App Figure 9 – Observed vs Predicted Conventional Crusher

SMC Test Report on Twenty Samples from Mt Todd Project Vista Gold Australia Pty Ltd

JKTech Job No. 11001 / P71 28

App Figure 9 – Observed vs Predicted Conventional Crusher Specific Energy

B 3.3 HPGRs

Validation of equation 1 for HPGRs used data from 18 different circuits (35 data sets) including laboratory, pilot and industrial scale equipment. Observed vs predicted specific energies are given in App Figure 10. The data relate to HPGRs operating with specific grinding forces typically in the range 2.5-3.5 N/mm2. The observed specific energies relate to power delivered by the roll drive shafts. Motor input power for full scale machines is expected to be 8-10% higher.

y = 0.9981x

R2 = 0.9669

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

predicted (kWh/t)

observ

ed (kW

h/t) 1



App Figure 10 – Observed vs Predicted HPGR Specific Energy

B 4 WORKED EXAMPLES

A SMC Test® and Bond ball work index test were carried out on a representative ore sample. The following results were obtained:

SMC Test:

Mia = 19.4 kWh/t

Mic = 7.2 kWh/t

Mih = 13.9 kWh/t

Bond test carried out with a 150 micron closing screen:

Mib = 18.8 kWh/t

Three circuits are to be evaluated:

SABC

HPGR/ball mill

Conventional crushing/ball mill

The overall specific grinding energy to reduce a primary crusher product with a P80 of 100 mm to a final product P80 of 106 µm needs to be estimated.

B 4.1 SABC Circuit

Coarse particle tumbling mill specific energy

y = 1.0006x

R2 = 0.9514

0

0.5

1

1.5

2

2.5

3

3.5

4

0 0.5 1 1.5 2 2.5 3 3.5 4

Predicted (kWh/t)

Observ

ed (kW

h/t) 1



Combining eq 2 and 4:

( )1000000/100000295.0()1000000/750295.0(100000750*4*4.19*95.0

+−+−−=aW

= 9.6 kWh/t

Fine particle tumbling mill specific energy


( )1000000/750295.0()1000000/106295.0(750106*4*8.18

+−+−−=bW

= 8.4 kWh/t

Pebble crusher specific energy

In this circuit, it is assumed that the pebble crusher feed P80 is 52.5mm. As a rule of thumb this value can be estimated by assuming that it is 0.75 of the nominal pebble port aperture (in this case the pebble port aperture is 70mm). The pebble crusher is set to give a product P80 of 12mm. The pebble crusher feed rate is expected to be 25% of new feed tph.


( )1000000/52500295.0()1000000/12000295.0(5250012000*4*2.7*19.1

+−+−−=cW

= 1.12 kWh/t when expressed in terms of the crusher feed rate

= 1.12 * 0.25 kWh/t when expressed in terms of the SABC circuit new feed rate

= 0.3 kWh/t of SAG mill circuit new feed

Total net comminution specific energy:

From eq 3:

WT = 9.6 + 8.4 + 0.3 kWh/t

= 18.3 kWh/t

B 4.2 HPGR/Ball Milling Circuit

In this circuit primary crusher product is reduced to a HPGR circuit feed P80 of 35 mm by closed circuit secondary crushing. The HPGR is also in closed circuit and reduces the 35 mm feed to a circuit product P80 of 4 mm. This is then fed to a closed circuit ball mill which takes the grind down to a P80 of 106 µm.

Secondary crushing specific energy


( )1000000/100000295.0()1000000/35000295.0(10000035000*4*2.7*1

+−+−−=cW



= 0.6 kWh/t

HPGR specific energy


( )1000000/35000295.0()1000000/4000295.0(350004000*4*9.13*1

+−+−−=cW

= 2.9 kWh/t



( )1000000/4000295.0()1000000/750295.0(4000750*4*4.19*1

+−+−−=aW

= 4.5 kWh/t



( )1000000/750295.0()1000000/106295.0(750106*4*8.18

+−+−−=bW

= 8.4 kWh/t


From eq 3:

WT = 4.5 + 8.4 + 0.6 + 2.9 kWh/t

= 16.4 kWh/t

B 4.3 Conventional Crushing/Ball Milling Circuit

In this circuit primary crusher product is reduced in size to P80 of 6.5 mm via a secondary/tertiary crushing circuit (closed). This is then fed to a closed circuit ball mill which grinds to a P80 of 106 µm.

Secondary/tertiary crushing specific energy


( )1000000/100000295.0()1000000/6500295.0(1000006500*4*2.7*1

+−+−−=cW

= 1.7 kWh/t





( )1000000/6500295.0()1000000/750295.0(6500750*4*4.19*1

+−+−−=aW

= 5.5 kWh/t



( )1000000/750295.0()1000000/106295.0(750106*4*8.18

+−+−−=bW

= 8.4 kWh/t

Size distribution correction

( )1000000/100000295.0()1000000/6500295.0(1000006500*4*4.19*19.0

+−+−−=sW

= 0.9 kWh/t


From eq 3:

WT = 5.5 + 8.4 + 1.7 + 0.9 kWh/t

= 16.5 kWh/t

B 5 REFERENCES

Morrell, S., 2004a. Predicting the Specific Energy of Autogenous and Semi-autogenous Mills from Small Diameter Drill Core Samples. Minerals Engineering, Vol 17/3 pp 447-451

Morrell, S., 2004b. An Alternative Energy-Size Relationship To That Proposed By Bond For The Design and Optimisation Of Grinding Circuits. International Journal of Mineral Processing, 74, 133-141.

Morrell, S., 2006. Rock Characterisation for High Pressure Grinding Rolls Circuit Design, Proc International Autogenous and Semi Autogenous Grinding Technology,Vancouver, vol IV pp 267-278.

Morrell,S., 2008a, A method for predicting the specific energy requirement of comminution circuits and assessing their energy utilisation efficiency, Minerals Engineering, Vol. 21, No. 3.

Morrell,S., 2008b, Predicting the Overall Specific Energy Requirements of AG/SAG, Ball Mill and HPGR Circuits on the Basis of Small-Scale Laboratory Ore Characterisation Tests, Proceedings Procemin Conference, Santiago, Chile

Stephenson, I.;1997, The downstream effects of high pressure grinding rolls processing, PhD Thesis, Julius Kruttschnitt Mineral Research Centre, Department of Mining and Metallurgical Engineering, University of Queensland.



Schonert, K., 1991. Advances in comminution fundamental, and impacts on technology. XVII International Mineral Processing Congress, Dresden, Volume 1,: pp 1-21.

Shi, F., Lambert, S., Daniel, M.J., 2006, Measurement of the effect of HPGR treating platinum ores. SAG 2006, Vancouver, 23-27 September 2006.

Report No. A13575 Part 1

APPENDIX XI

Mt Todd Variability Gold Ore Drill Core

Bond Ball Mill Work Index Determination

Details and Results

BOND BALL MILL CLOSED CIRCUIT GRINDABILITY : 106 MICROMETERS

SAMPLE IDENTITY COMPOSITE #4

CLIENT VISTA GOLD CORPORATION: MT TODD FEASIBILITY

PROJECT No A13575

DATE Jun-11

WT OF WT OF

PERIOD REVS WT OF WT OF WT WT NET WT NET WT CIRC'TING FRESH U/SIZE

OF 700 NEW OF OF OF OF LOAD FEED IN FEED

MILL mls FEED O/SIZE U/SIZE U/SIZE U/SIZE ADDED TO TO NEXT

PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 240 1250.5 1250.5 1028.3 222.2 141.0 0.588 463 222.2 14.4

2 583 1250.5 222.2 872.0 378.5 364.1 0.624 230 378.5 24.6

3 533 1250.5 378.5 870.7 379.8 355.2 0.666 229 379.8 24.6

4 499 1250.5 379.8 890.1 360.4 335.8 0.673 247 360.4 23.4

5 496 1250.5 360.4 893.2 357.3 333.9 0.673 250 357.3 23.2

6 496 1250.5 357.3 893.2 357.3 334.1 0.674 250 357.3 23.2

Note : * = Ex grinding mill

PRODUCT IN THE FEED 6.49 (%)

BULK DENSITY 1.7864 (t/m3)

IDEAL POTENTIAL PRODUCT 357.3 (g)

AVERAGE EQUILIBRIUM CIRC LOAD 250 (%)

AVERAGE PRODUCT 0.673 (g/rev)

80 % PASSING FEED SIZE 2656 (µm)

80 % PASSING PRODUCT SIZE 80 (µm)

BOND BALL MILL WORK INDEX ( Kilowatt hours / dry tonne ) : 25.0

BOND BALL MILL GRINDABILITY TEST FEED AND PRODUCT SIZINGS

COMPOSITE #4A13575

FEED TO PERIOD No. 1 EQUILIBRIUM PRODUCTS

Size Weight Retained Passing Size Weight Retained Passing

(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 126.7 15.31 84.69 0.090 48.8 13.66 86.34

2.000 216.3 26.14 58.55 0.075 32.6 9.12 77.22

1.400 150.5 18.19 40.36 0.063 24.4 6.83 70.39

1.000 81.7 9.87 30.49 0.045 46.5 13.01 57.37

0.600 84.1 10.16 20.33 -0.045 205.0 57.37

0.300 64.5 7.79 12.53

0.150 38.3 4.63 7.90 TOTAL 357.3 100.00

0.106 11.7 1.41 6.49

-0.106 53.7 6.49 P 80 (µm) : 80

TOTAL 827.5 100.00

F 80 (µm) : 2656

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)

BOND BALL MILL GRINDABILITY : FEED & PRODUCT SIZEDISTRIBUTION




PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1173.0 1173.0 974.6 198.4 117.2 0.586 491 198.4 13.7

2 548 1173.0 198.4 820.1 352.9 339.2 0.619 232 352.9 24.4

3 502 1173.0 353.0 818.8 354.2 329.8 0.657 231 354.2 24.5

4 473 1173.0 354.2 837.9 335.1 310.6 0.657 250 335.1 23.2

5 475 1173.0 335.1 837.9 335.1 311.9 0.657 250 335.1 23.2











COMPOSITE #10A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 168.5 19.87 80.13 0.090 38.6 11.52 88.48

2.000 200.9 23.69 56.45 0.075 31.8 9.49 78.99

1.400 147.8 17.43 39.02 0.063 22.4 6.68 72.31

1.000 79.2 9.34 29.69 0.045 45.6 13.61 58.70

0.600 77.3 9.11 20.57 -0.045 196.7 58.70

0.300 64.5 7.60 12.97

0.150 38.7 4.56 8.41 TOTAL 335.1 100.00

0.106 12.6 1.49 6.92

-0.106 58.7 6.92 P 80 (µm) : 77

TOTAL 848.2 100.00

F 80 (µm) : 2795

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1215.9 1215.9 1011.9 204.0 143.5 0.574 496 204.0 10.2

2 588 1215.9 204.0 878.8 337.1 326.9 0.556 261 337.1 16.8

3 595 1215.9 337.1 850.7 365.2 348.4 0.586 233 365.2 18.2

4 562 1215.9 365.2 868.5 347.4 329.2 0.586 250 347.4 17.3

5 564 1215.9 347.4 868.5 347.4 330.1 0.585 250 347.4 17.3











COMPOSITE #13A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 68.2 8.28 91.72 0.090 42.4 12.20 87.80

2.000 239.6 29.10 62.62 0.075 31.3 9.01 78.79

1.400 174.2 21.16 41.46 0.063 23.0 6.62 72.16

1.000 92.0 11.17 30.29 0.045 45.7 13.15 59.01

0.600 92.8 11.27 19.02 -0.045 205.0 59.01

0.300 68.6 8.33 10.69

0.150 34.9 4.24 6.45 TOTAL 347.4 100.00

0.106 12.1 1.47 4.98

-0.106 41.0 4.98 P 80 (µm) : 77

TOTAL 823.4 100.00

F 80 (µm) : 2478

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1251.9 1251.9 1055.2 196.7 114.4 0.572 536 196.7 12.9

2 602 1251.9 196.7 887.3 364.6 351.7 0.584 243 364.6 24.0

3 571 1251.9 364.6 865.6 386.3 362.3 0.635 224 386.3 25.4

4 524 1251.9 386.3 886.5 365.4 340.0 0.649 243 365.4 24.0

5 514 1251.9 365.4 887.4 364.5 340.5 0.662 243 364.5 23.9

6 504 1251.9 364.5 894.2 357.7 333.8 0.662 250 357.7 23.5

7 505 1251.9 357.7 894.2 357.7 334.2 0.662 250 357.7 23.5











COMPOSITE #24A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 126.5 15.34 84.66 0.090 40.5 11.32 88.68

2.000 223.7 27.12 57.55 0.075 30.0 8.39 80.29

1.400 146.3 17.74 39.81 0.063 20.4 5.70 74.59

1.000 80.3 9.73 30.08 0.045 42.7 11.94 62.65

0.600 79.8 9.67 20.40 -0.045 224.1 62.65

0.300 66.9 8.11 12.29

0.150 36.5 4.42 7.87 TOTAL 357.7 100.00

0.106 10.7 1.30 6.57

-0.106 54.2 6.57 P 80 (µm) : 74

TOTAL 824.9 100.00

F 80 (µm) : 2662

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1270.8 1270.8 1056.5 214.3 107.5 0.538 493 214.3 18.0

2 642 1270.8 214.3 902.5 368.3 350.3 0.546 245 368.3 30.9

3 609 1270.8 368.3 885.5 385.3 354.4 0.582 230 385.3 32.4

4 568 1270.8 385.3 883.5 387.3 354.9 0.625 228 387.3 32.5

5 529 1270.8 387.3 917.0 353.8 321.3 0.607 259 353.8 29.7

6 549 1270.8 353.8 903.5 367.3 337.6 0.615 246 367.3 30.9

7 540 1270.8 367.3 907.7 363.1 332.2 0.615 250 363.1 30.5

8 541 1270.8 363.1 907.7 363.1 332.6 0.615 250 363.1 30.5











COMPOSITE #27A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 120.0 14.46 85.54 0.090 45.4 12.50 87.50

2.000 147.9 17.83 67.71 0.075 32.1 8.84 78.66

1.400 146.6 17.67 50.04 0.063 22.3 6.14 72.51

1.000 96.6 11.64 38.40 0.045 42.7 11.76 60.75

0.600 100.4 12.10 26.30 -0.045 220.6 60.75

0.300 86.7 10.45 15.85

0.150 47.9 5.77 10.08 TOTAL 363.1 100.00

0.106 13.9 1.68 8.40

-0.106 69.7 8.40 P 80 (µm) : 77

TOTAL 829.7 100.00

F 80 (µm) : 2552

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1203.5 1203.5 1013.1 190.4 124.2 0.497 532 190.4 10.5

2 671 1203.5 190.4 825.3 378.2 367.7 0.548 218 378.2 20.8

3 589 1203.5 378.2 849.8 353.7 332.9 0.565 240 353.7 19.5

4 574 1203.5 353.7 859.6 343.9 324.4 0.565 250 343.9 18.9

5 575 1203.5 343.9 859.6 343.9 325.0 0.565 250 343.9 18.9











COMPOSITE #28A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 81.1 9.25 90.75 0.090 35.5 10.32 89.68

2.000 248.9 28.40 62.35 0.075 30.7 8.93 80.75

1.400 189.0 21.56 40.79 0.063 21.5 6.25 74.50

1.000 98.5 11.24 29.55 0.045 46.0 13.38 61.12

0.600 95.3 10.87 18.68 -0.045 210.2 61.12

0.300 68.3 7.79 10.88

0.150 36.8 4.20 6.69 TOTAL 343.9 100.00

0.106 10.4 1.19 5.50

-0.106 48.2 5.50 P 80 (µm) : 74

TOTAL 876.5 100.00

F 80 (µm) : 2497

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1227.8 1227.8 139.9 1087.9 1021.1 5.105 13 1087.9 59.2

2 562 1227.8 188.1 890.2 337.6 278.4 0.495 264 337.6 18.4

3 571 1227.8 337.6 846.3 381.5 363.1 0.636 222 381.5 20.8

4 519 1227.8 381.5 863.2 364.6 343.8 0.662 237 364.6 19.8

5 500 1227.8 364.6 877.0 350.8 331.0 0.662 250 350.8 19.1

6 501 1227.8 350.8 877.0 350.8 331.7 0.662 250 350.8 19.1











COMPOSITE #42A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 84.6 9.68 90.32 0.090 39.4 11.23 88.77

2.000 262.8 30.05 60.27 0.075 30.9 8.81 79.96

1.400 177.8 20.33 39.94 0.063 21.5 6.13 73.83

1.000 92.2 10.54 29.39 0.045 45.2 12.88 60.95

0.600 92.4 10.57 18.82 -0.045 213.8 60.95

0.300 68.7 7.86 10.97

0.150 35.4 4.05 6.92 TOTAL 350.8 100.00

0.106 12.9 1.48 5.44

-0.106 47.6 5.44 P 80 (µm) : 75

TOTAL 874.4 100.00

F 80 (µm) : 2525

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1226.1 1226.1 1029.1 197.0 136.1 0.544 522 197.0 9.8

2 625 1226.1 197.0 870.7 355.4 345.6 0.553 245 355.4 17.6

3 602 1226.1 355.4 866.3 359.8 342.2 0.568 241 359.8 17.9

4 585 1226.1 359.8 875.8 350.3 332.4 0.568 250 350.3 17.4

5 586 1226.1 350.3 875.8 350.3 332.9 0.568 250 350.3 17.4











COMPOSITE #47A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 116.9 14.70 85.30 0.090 33.0 9.56 90.44

2.000 218.5 27.47 57.83 0.075 24.3 7.04 83.41

1.400 153.3 19.27 38.56 0.063 21.2 6.14 77.27

1.000 82.4 10.36 28.20 0.045 42.5 12.31 64.96

0.600 82.6 10.38 17.81 -0.045 224.3 64.96

0.300 61.0 7.67 10.15

0.150 32.8 4.12 6.02 TOTAL 345.3 100.00

0.106 8.4 1.06 4.97

-0.106 39.5 4.97 P 80 (µm) : 68

TOTAL 795.4 100.00

F 80 (µm) : 2646

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1163.0 1163.0 983.0 180.0 127.9 0.512 546 180.0 8.1

2 634 1163.0 180.0 817.1 345.9 337.8 0.533 236 345.9 15.5

3 595 1163.0 345.9 803.1 359.9 344.4 0.579 223 359.9 16.1

4 546 1163.0 359.9 823.3 339.7 323.6 0.593 242 339.7 15.2

5 535 1163.0 339.7 830.7 332.3 317.1 0.593 250 332.3 14.9

6 536 1163.0 332.3 830.7 332.3 317.4 0.592 250 332.3 14.9











COMPOSITE #52A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 104.4 12.51 87.49 0.090 46.8 14.08 85.92

2.000 234.0 28.03 59.46 0.075 30.2 9.09 76.83

1.400 165.8 19.86 39.60 0.063 21.1 6.35 70.48

1.000 91.5 10.96 28.64 0.045 44.3 13.33 57.15

0.600 87.5 10.48 18.16 -0.045 189.9 57.15

0.300 69.6 8.34 9.82

0.150 35.0 4.19 5.63 TOTAL 332.3 100.00

0.106 9.6 1.15 4.48

-0.106 37.4 4.48 P 80 (µm) : 80

TOTAL 834.8 100.00

F 80 (µm) : 2586

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1176.5 1176.5 998.4 178.1 113.7 0.568 561 178.1 9.8

2 574 1176.5 178.1 829.4 347.1 337.3 0.588 239 347.1 19.0

3 540 1176.5 347.1 825.6 350.9 331.9 0.615 235 350.9 19.2

4 516 1176.5 350.9 844.6 331.9 312.7 0.606 254 331.9 18.2

5 525 1176.5 331.9 840.4 336.1 317.9 0.606 250 336.1 18.4

6 525 1176.5 336.1 840.4 336.1 317.7 0.605 250 336.1 18.4











COMPOSITE #55A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 101.3 11.80 88.20 0.090 30.6 9.10 90.90

2.000 250.2 29.15 59.05 0.075 28.9 8.60 82.30

1.400 173.2 20.18 38.87 0.063 21.2 6.31 75.99

1.000 92.3 10.75 28.12 0.045 44.5 13.24 62.75

0.600 90.3 10.52 17.60 -0.045 210.9 62.75

0.300 63.5 7.40 10.21

0.150 30.4 3.54 6.66 TOTAL 336.1 100.00

0.106 10.2 1.19 5.48

-0.106 47.0 5.48 P 80 (µm) : 71

TOTAL 858.4 100.00

F 80 (µm) : 2575

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1232.1 1232.1 1057.5 174.6 119.4 0.478 606 174.6 7.8

2 721 1232.1 174.6 864.2 367.9 360.1 0.499 235 367.9 16.5

3 672 1232.1 367.9 848.8 383.3 366.8 0.546 221 383.3 17.2

4 613 1232.1 383.3 856.0 376.1 358.9 0.586 228 376.1 16.8

5 572 1232.1 376.1 874.8 357.3 340.5 0.595 245 357.3 16.0

6 565 1232.1 357.3 880.1 352.0 336.0 0.595 250 352.0 15.8

7 565 1232.1 352.0 880.1 352.0 336.2 0.595 250 352.0 15.8











COMPOSITE #56A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 85.8 10.50 89.50 0.090 42.3 12.02 87.98

2.000 223.1 27.29 62.21 0.075 34.0 9.66 78.33

1.400 160.2 19.60 42.61 0.063 23.0 6.53 71.79

1.000 92.5 11.32 31.29 0.045 47.4 13.46 58.33

0.600 93.0 11.38 19.92 -0.045 205.3 58.33

0.300 75.6 9.25 10.67

0.150 39.7 4.86 5.81 TOTAL 352.0 100.00

0.106 10.9 1.33 4.48

-0.106 36.6 4.48 P 80 (µm) : 78

TOTAL 817.4 100.00

F 80 (µm) : 2521

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1297.0 1297.0 1113.6 183.4 108.2 0.541 607 183.4 10.6

2 665 1297.0 183.4 931.5 365.5 354.9 0.534 255 365.5 21.2

3 655 1297.0 365.5 897.4 399.6 378.4 0.578 225 399.6 23.2

4 601 1297.0 399.6 934.7 362.3 339.1 0.564 258 362.3 21.0

5 619 1297.0 362.3 926.4 370.6 349.6 0.565 250 370.6 21.5

6 618 1297.0 370.6 926.4 370.6 349.1 0.565 250 370.6 21.5











COMPOSITE #57A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 75.6 9.35 90.65 0.090 40.8 11.01 88.99

2.000 209.3 25.88 64.77 0.075 33.6 9.07 79.92

1.400 153.9 19.03 45.75 0.063 24.7 6.67 73.26

1.000 90.8 11.23 34.52 0.045 49.3 13.30 59.95

0.600 99.8 12.34 22.18 -0.045 222.2 59.95

0.300 77.1 9.53 12.65

0.150 40.6 5.02 7.63 TOTAL 370.6 100.00

0.106 14.8 1.83 5.80

-0.106 46.9 5.80 P 80 (µm) : 75

TOTAL 808.8 100.00

F 80 (µm) : 2471

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1218.6 1218.6 1022.1 196.5 139.2 0.557 520 196.5 9.2

2 609 1218.6 196.5 887.1 331.5 322.3 0.529 268 331.5 15.6

3 629 1218.6 331.5 856.6 362.0 346.4 0.551 237 362.0 17.0

4 601 1218.6 362.0 841.2 377.4 360.4 0.600 223 377.4 17.8

5 551 1218.6 377.4 879.5 339.1 321.3 0.583 259 339.1 16.0

6 570 1218.6 339.1 870.4 348.2 332.2 0.583 250 348.2 16.4

7 569 1218.6 348.2 870.4 348.2 331.8 0.583 250 348.2 16.4











COMPOSITE #58A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 164.8 19.68 80.32 0.090 42.6 12.24 87.76

2.000 207.9 24.82 55.50 0.075 32.1 9.22 78.54

1.400 152.8 18.24 37.26 0.063 23.1 6.63 71.91

1.000 84.9 10.14 27.13 0.045 44.5 12.78 59.13

0.600 84.7 10.11 17.01 -0.045 205.9 59.13

0.300 60.8 7.26 9.75

0.150 30.7 3.67 6.09 TOTAL 348.2 100.00

0.106 11.6 1.38 4.70

-0.106 39.4 4.70 P 80 (µm) : 77

TOTAL 837.6 100.00

F 80 (µm) : 2790

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1180.5 1180.5 1012.9 167.6 103.2 0.516 604 167.6 9.1

2 636 1180.5 167.6 836.5 344.0 334.9 0.526 243 344.0 18.8

3 605 1180.5 344.0 818.5 362.0 343.2 0.567 226 362.0 19.8

4 560 1180.5 362.0 833.9 346.6 326.8 0.584 241 346.6 18.9

5 545 1180.5 346.6 843.2 337.3 318.4 0.584 250 337.3 18.4

6 546 1180.5 337.3 843.2 337.3 318.9 0.584 250 337.3 18.4











COMPOSITE #60A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 153.1 18.45 81.55 0.090 40.7 12.07 87.93

2.000 202.4 24.39 57.17 0.075 35.0 10.38 77.56

1.400 150.2 18.10 39.07 0.063 23.7 7.03 70.53

1.000 83.8 10.10 28.98 0.045 48.2 14.29 56.24

0.600 84.4 10.17 18.81 -0.045 189.7 56.24

0.300 62.7 7.55 11.25

0.150 34.3 4.13 7.12 TOTAL 337.3 100.00

0.106 13.8 1.66 5.46

-0.106 45.3 5.46 P 80 (µm) : 79

TOTAL 830.0 100.00

F 80 (µm) : 2749

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 250 1247.1 1247.1 1043.3 203.8 144.7 0.579 512 203.8 9.7

2 599 1247.1 203.8 913.0 334.1 324.4 0.542 273 334.1 15.8

3 629 1247.1 334.1 881.2 365.9 350.1 0.557 241 365.9 17.3

4 609 1247.1 365.9 890.8 356.3 339.0 0.557 250 356.3 16.9

5 610 1247.1 356.3 890.8 356.3 339.4 0.556 250 356.3 16.9











COMPOSITE #61A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 169.7 19.75 80.25 0.090 38.6 10.83 89.17

2.000 214.9 25.01 55.25 0.075 33.9 9.51 79.65

1.400 152.1 17.70 37.55 0.063 23.5 6.60 73.06

1.000 86.9 10.11 27.44 0.045 49.1 13.78 59.28

0.600 87.0 10.12 17.31 -0.045 211.2 59.28

0.300 63.4 7.38 9.94

0.150 32.7 3.80 6.13 TOTAL 356.3 100.00

0.106 12.0 1.40 4.74

-0.106 40.7 4.74 P 80 (µm) : 76

TOTAL 859.4 100.00

F 80 (µm) : 2792

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1264.3 1264.3 1056.3 208.0 120.9 0.604 508 208.0 14.3

2 574 1264.3 208.0 907.7 356.6 342.3 0.596 255 356.6 24.6

3 565 1264.3 356.6 865.8 398.5 373.9 0.662 217 398.5 27.5

4 504 1264.3 398.5 903.1 361.2 333.7 0.662 250 361.2 24.9

5 508 1264.3 361.2 903.1 361.2 336.3 0.662 250 361.2 24.9











COMPOSITE #62A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 85.9 10.44 89.56 0.090 44.7 12.37 87.63

2.000 236.3 28.72 60.84 0.075 32.9 9.11 78.52

1.400 164.9 20.04 40.80 0.063 22.8 6.31 72.21

1.000 83.5 10.15 30.65 0.045 47.4 13.12 59.08

0.600 83.7 10.17 20.48 -0.045 213.4 59.08

0.300 63.5 7.72 12.76

0.150 34.9 4.24 8.52 TOTAL 361.2 100.00

0.106 13.4 1.63 6.89

-0.106 56.7 6.89 P 80 (µm) : 77

TOTAL 822.8 100.00

F 80 (µm) : 2534

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1242.1 1242.1 1066.2 175.9 108.7 0.543 606 175.9 9.5

2 636 1242.1 175.9 880.5 361.6 352.1 0.554 244 361.6 19.6

3 606 1242.1 361.6 874.9 367.2 347.6 0.574 238 367.2 19.9

4 584 1242.1 367.2 872.2 369.9 350.0 0.599 236 369.9 20.0

5 559 1242.1 369.9 877.6 364.5 344.5 0.616 241 364.5 19.7

6 544 1242.1 364.5 887.2 354.9 335.2 0.616 250 354.9 19.2

7 545 1242.1 354.9 887.2 354.9 335.7 0.616 250 354.9 19.2











COMPOSITE #63A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 126.3 15.97 84.03 0.090 44.6 12.57 87.43

2.000 193.0 24.40 59.63 0.075 34.3 9.66 77.77

1.400 159.7 20.19 39.44 0.063 24.0 6.76 71.01

1.000 82.2 10.39 29.05 0.045 47.0 13.24 57.76

0.600 82.5 10.43 18.62 -0.045 205.0 57.76

0.300 60.7 7.67 10.95

0.150 31.8 4.02 6.93 TOTAL 354.9 100.00

0.106 12.0 1.52 5.41

-0.106 42.8 5.41 P 80 (µm) : 78

TOTAL 791.0 100.00

F 80 (µm) : 2668

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1276.9 1276.9 1025.8 251.1 166.8 0.834 409 251.1 16.6

2 417 1276.9 251.1 1009.1 267.8 251.2 0.602 377 267.8 17.7

3 576 1276.9 267.8 887.7 389.2 371.5 0.645 228 389.2 25.7

4 526 1276.9 389.2 888.9 388.0 362.3 0.689 229 388.0 25.6

5 492 1276.9 388.0 912.1 364.8 339.2 0.689 250 364.8 24.1

6 494 1276.9 364.8 912.1 364.8 340.7 0.690 250 364.8 24.1











COMPOSITE #65A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 97.4 14.57 85.43 0.090 49.0 13.43 86.57

2.000 160.6 24.03 61.39 0.075 35.5 9.73 76.84

1.400 138.7 20.75 40.64 0.063 24.5 6.72 70.12

1.000 70.0 10.47 30.17 0.045 47.3 12.96 57.16

0.600 67.4 10.09 20.08 -0.045 208.5 57.16

0.300 51.3 7.68 12.40

0.150 28.8 4.31 8.10 TOTAL 364.8 100.00

0.106 10.0 1.50 6.60

-0.106 44.1 6.60 P 80 (µm) : 80

TOTAL 668.3 100.00

F 80 (µm) : 2619

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1267.6 1267.6 1047.4 220.2 141.7 0.709 476 220.2 13.6

2 492 1267.6 220.2 943.1 324.5 310.9 0.632 291 324.5 20.1

3 541 1267.6 324.5 867.5 400.1 380.0 0.702 217 400.1 24.8

4 480 1267.6 400.1 905.4 362.2 337.4 0.703 250 362.2 22.4

5 483 1267.6 362.2 905.4 362.2 339.8 0.703 250 362.2 22.4











COMPOSITE #69A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 109.5 16.29 83.71 0.090 41.5 11.46 88.54

2.000 172.5 25.67 58.04 0.075 34.2 9.44 79.10

1.400 126.4 18.81 39.23 0.063 22.4 6.18 72.91

1.000 68.1 10.13 29.09 0.045 47.0 12.98 59.94

0.600 66.3 9.87 19.23 -0.045 217.1 59.94

0.300 50.2 7.47 11.76

0.150 28.1 4.18 7.57 TOTAL 362.2 100.00

0.106 9.3 1.38 6.19

-0.106 41.6 6.19 P 80 (µm) : 76

TOTAL 672.0 100.00

F 80 (µm) : 2685

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)





PROJECT No A13575

DATE Jun-11

WT OF WT OF




PER REV NEXT CYCLE

(g) (g) (g)* (g)* (g)* (g) (%) CYCLE (g) (g)

1 200 1229.5 1229.5 1035.5 194.0 132.4 0.662 534 194.0 9.7

2 516 1229.5 194.0 905.0 324.5 314.8 0.610 279 324.5 16.3

3 549 1229.5 324.5 847.4 382.1 365.8 0.666 222 382.1 19.1

4 498 1229.5 382.1 869.9 359.6 340.5 0.684 242 359.6 18.0

5 487 1229.5 359.6 878.2 351.3 333.3 0.684 250 351.3 17.6

6 488 1229.5 351.3 878.2 351.3 333.7 0.684 250 351.3 17.6











COMPOSITE #74A13575



(mm) (g) (%) (%) (mm) (g) (%) (%)

2.800 100.5 14.85 85.15 0.090 46.9 13.70 86.30

2.000 189.1 27.94 57.22 0.075 34.4 10.05 76.25

1.400 134.4 19.86 37.36 0.063 24.7 7.22 69.03

1.000 70.2 10.37 26.99 0.045 46.3 13.53 55.51

0.600 65.7 9.71 17.28 -0.045 190.0 55.51

0.300 48.3 7.14 10.15

0.150 26.4 3.90 6.25 TOTAL 342.3 100.00

0.106 8.4 1.24 5.01

-0.106 33.9 5.01 P 80 (µm) : 81

TOTAL 676.9 100.00

F 80 (µm) : 2652

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

10 100 1000 10000

% P

AS

SIN

G

SIZE (MICROMETERS)



APPENDIX XII

Mt Todd Variability Gold Ore Drill Core

• Mineralogy (MLA) Report MIN815 • LIMS Testwork

Details and Results

Qu

TheALS Am

uantitativ

Six (6

e results containmmtec accepts n

ve Automco

6) DiamonMt T

Vista Go(Proj

Minera

J

ned in this reporno responsibility

ated Minonducted on

nd Core STodd Proj

for

old Corpoject A135

alogy RepMIN815

uly 201

rt relate only to ty for the represe

eralogica

Samples frect

oration 75)

port No. 5

11

the sample(s) suntativeness of th

al Analysis

rom

bmitted for testhe sample(s) sub

is

ting. bmitted.

SUMMA 1.

2.

3.

4.

5.

APPE Append Append

ARY

INTRODUC

SAMPLES R

SAMPLE PR

ANALYTICA

RESULTS

5.1 Qua

5.2 Calc

5.3 Tex

5.3.1

5.3.2

5.3.3

5.3.4

5.3.5

5.3.6

ENDICES

dix I Q

dix II P

T

CTION

RECEIVED

REPARATIO

AL PROCED

antitative M

culated Par

xtural Indica

1 Comp

2 Comp

3 Comp

4 Comp

5 Comp.

6 Comp.

S

Quantitative

Particle Imag

TABLE O

ON

DURES

Mineralogy

rticle and G

ations (Par

#16 VB11-0

#19 VB11-0

#26 VB11-0

#33 VB12-0

. #39 VB12–

. #91 VB12–

Mineralogy

ges

OF CON

y and Gold-

Grain Size

rticle Image

001 349-36

001 380-39

001 456-46

002 284-29

–002 45–35

–010 18.80–

y and SEM Im

NTENT

Silver Mine

es)

60 m

9 1m

65 m

94 m

5 m

–29.92 m

mages of D

Mineralogy R

TS

eralisation

etected Gol

Report No. MIN

ld-Silver Min

N815 (A13575)

PAGE NO.

(i)

1

1

2

2

2

2

5

7

7

7

7

8

8

8

neral Grains

)

.

s

The minCorpora A summ

neralogical ation was re

mary of sign

The modal as indicativproduce stathe samplesexpected amica/clays tthis. Asideincluding pthe dominalarge pyrrhothe chalcopComp #26 galena in th

From the manalysis it argentian gcould contahigh bismupresent wit

The generathe bounda

examinatioequested by

ificant findin

mineralogive values, atistically ros does shows the quartzthan quartze from the

pyrite, pyrrhant sulphideotite grain dpyrite showsshowing ne

he samples w

manual SEMwas found

gold. It was aain a very tth peak heih the bismu

l gold mineary between

SU

on of six (6) y the ALS Am

ngs follows:

cal data obas measure

obust minerws dominanz vein was , and later e

e silicates, sotite, chalcoe is pyrite, detected in s a significaearly 1% chwere only d

M EDS analy that the malso found ttrace amounight exact quth.

eralisation fo the vein an

Page i of i

UMMAR

core sampmmtec gold

:

btained for tement of aral populatice of quartztargeted. In

examinationseveral sulpopyrite, sphwith the nothe measur

ant occurrenhalcopyrite cdetected at t

ysis of the dmajority of that the bismnt of platin

quantificatio

or all samplend the host

RY

ples from thd processing

the 6 polisha single 2Dions. Howez and mica/nterestingly,n of the minphides werhalerite andotable exceement area

nce in the Vconcentratiotrace amoun

detected gothe gold o

muth detectum. Howe

on could not

es occurredrock.

Mineralogy R

he Mt Todd g team.

hed sectionsD cross-secever, the ind/clays in all s Comp #33eral map wie also dete galena. In

eption of Co. Of the rem

VB11 sampleon. The remnts.

old grains doccurred asted with thever, due to t be carried

within the

Report No. MIN

Project for

s should bectional surfdicative misamples, wh3 indicates ill reveal theected in thn most of tomp #26 wmaining sulpes, with Commaining sph

during the gs both puree gold was m peak overl out on trac

quartz vein,

N815 (A13575)

r Vista Gold

e taken onlyace cannotneralogy ofhich is to bemuch moree reason forhe samples,he samples

which had aphides, onlymp #16 andhalerite and

gold searche gold andmetallic andlap and thece platinum

, or close to

)

d

y t f e e r , s a y d d

h d d e

m

o

1.

The minCorpora The aim

The minproject Mineral

2.

The sam

Com

Com

Com

Com

Com

Com

INTRO

neralogical ation was re

m of the min

Gold miner

Modal mine

neralogical operator logy).

SAMPL

mple details

Samp

mp. #16 VB11

mp. #19 VB11

mp. #26 VB11

mp. #33 VB12

mp. #39 VB12

p. #91 VB12 –

ODUCTI

examinatioequested by

neralogical i

ral composi

eralogy of t

work was rand was u

LES REC

are listed in

ple Name

1 – 001 349 – 3

1 – 001 380 – 3

1 – 001 456 – 4

2 – 002 284 – 2

2 – 002 345 – 3

– 010 18.80 – 2

ON

on of six (6)y the ALS Am

investigatio

tion, occurr

the samples

requested bundertaken

CEIVED

n the table b

360 m

391 m

467 m

294 m

355 m

29.92 m

Page 1 of 8

core sampmmtec gold

ons is to cha

rence and a

s

by Mr Way and supe

D

below:

Sample Ty

Core

Core

ples from thd processing

aracterise th

ssociations

yne Hardingervised by

ype Ma

Mineralogy R

he Mt Todd g team.

he following

g (ALS AmmDr Chi Vi

ass % Retaine

N/A

N/A

Report No. MIN

Project for

g:

mtec) on beinh Ly (AL

ed MinSam

MIN

MIN

MIN

MIN

MIN

MIN

N815 (A13575)

r Vista Gold

ehalf of theLS Ammtec

neralogy mple No.

N815A1A

N815B1A

N815C1A

N815D1A

N815E1A

N815F1A

)

d

e c

3.

The qurectangwere thblocks wthe polisample

4. A

All samSEM Par The momode ofalse coelectronachieve15 μm. A brighbackscaScanner(Energy

5.

5.1

During Data va

SAMPL

artz vein rular blocks,

hen embeddwere cut baished sectio was then ca

ANALY

ples have brticle Scann

odal mineralof analysis molour imagen intensity t reasonable

ht mineral attering incr. All selec

y Dispersive

RESULT

Quantita

automated

lidation allo

LE PREP

running thr, containingded into a tck to expos

on holder, bearbon coate

YTICAL

been analyseer for the g

logical and tmode on thee of the sao infer the me analysis t

search focluding golcted grains Detector, E

TS

ative Min

analysis, the

owed simpli

PARAT

ough each this vein, wtwo-part epse a fresh suefore being

ed prior to in

PROCE

ed with QEMold mineral

textural anae QEMSCANmple. Themineralogy imes and re

or the phad-rich mine

s were indivDS, standard

neralogy

e data resul

fication of t

Page 2 of 8

ION

of the sawere cut fropoxy resin, aurface of the polished dntroduction

EDURE

MSCAN instl search.

alysis of the N, which raste system us of each pixeesolution a

ases with eral phasesvidually valdless).

and Gol

lted in an ex

the mineral

mples was m the receiand allowede sample anown to a 1 into the ins

ES

rument for

sample wasters over theses the chael in generall samples

high atoms was undlidated usin

d-Silver

xtensive min

list into foll

Mineralogy R

isolated aved core sad to set oved trimmed micron diamstrument fo

quantitative

s carried oute whole anaracteristic x

ation of the were run a

ic density ertaken wit

ng X-ray sp

Minerali

neral list.

owing mine

Report No. MIN

and thin seamples. Theernight. On down in sizmond paste

or analysis.

e mineralog

t using the alysis area gx-ray and b false colourt a pixel re

and stronth Zeiss SEpectrum sp

isation

eral groupin

N815 (A13575)

ection sizedese samplesnce set, theze to fit into finish. The

gy and Zeiss

Field Imageenerating a

back scatterr image. Toesolution of

ng electronEM Particleot analyses

ngs:

)

d s e o e

s

e a r o f

n e s

Min

P

Ch

S

Ar

M

C

F

Min

Mi

The quathe data

M

neral Group

Gold

Silver

Bismuth

Pyrite

Pyrrhotite

halcopyrite

Sphalerite

Galena

rsenopyrite

Quartz

Mica/Clays

arbonates

Fe Oxides

nor Silicates

inor Phases

antitative ma appear in

Mineral Group

Gold

Silver

Bismuth

Pyrite

Pyrrhotite

Chalcopyrit

Sphalerite

Galena

Arsenopyri

Quartz

Mica/Clay

Carbonate

Fe Oxides

Minor Silica

Minor Phas

Defined

Defined

Defined

mineralogy foAppendix I.

ping

e

te

e

ite

s

es

s

tes

ses

d as any pixel

d as any pixel

d as any pixel r

Predominant

Pred

or the samp

Comp. #16 V349 – 3

0.0

0.0

0.0

16.

0.2

0.9

0.0

0.0

0.0

75.

6.1

0.0

0.0

0.0

0.0

Page 3 of 8

Minera

l reporting Au

l reporting Ag

reporting Bi in

tly muscovite,

Predominan

dominantly goe

O

All

ples is show

MINERA

VB11 – 001 360 m

09

00

09

79

23

94

00

03

06

50

15

02

07

00

02

l Formula or

in the automa

in the automa

n the automate

FeS2

FeS(1-n) (n=0-0

FeCuS2

(Zn, Fe)S

PbS

FeAsS

SiO2

and secondary

ntly calcite and

oethitic/limonit

Other trace sili

ll other trace m

wn in the ta

AL MASS PERC

Comp. #19 380 –

0.0

0.0

0.0

37

0.0

0.0

0.0

0.1

0.0

56

0.1

5.9

0.0

0.0

0.0

Mineralogy R

Description

ated X-ray scan

ated X-ray sca

ted X-ray scan

0.17)

S

ry biotite, kaol

d minor dolom

tic hydrated iro

licates

minerals

bles below.

CENT (%) IN S

VB11 – 001 391 m

00

00

00

.33

03

06

01

18

00

.35

13

90

01

00

01

Report No. MIN

an (Mainly arge

an (Mainly silve

n (Mainly meta

linite and chlo

mite

on oxides

Bar charts

SAMPLE

Comp. #26 456 –

0.

0.

0.

0.

16

0.

0.

0.

0.

50

30

0.

0.

0.

0.

N815 (A13575)

entian gold)

er sulphide)

allic bismuth)

orite.

s illustrating

VB11 – 001 467 m

00

00

00

80

6.82

84

14

02

00

0.44

0.66

02

09

04

13

)

g

M

Mineral Group

Gold

Silver

Bismuth

Pyrite

Pyrrhotite

Chalcopyrit

Sphalerite

Galena

Arsenopyri

Quartz

Mica/Clay

Carbonate

Fe Oxides

Minor Silica

Minor Phas

The modal as indicativproduce stathe sampleexpected asmica/clays tthis. Asideincluding pdominant spyrrhotite gchalcopyriteComp #26 galena in th

From the manalysis it argentian gand could cthe high bplatinum pr

ping

e

te

e

ite

s

es

s

tes

ses

mineralogive values, atistically ros does shows the quartzthan quartze from theyrite, pyrrhosulphide is grain detecte shows a showing ne

he samples w

manual SEMwas found

gold. It wascontain a v

bismuth pearesent with

Comp. #33 V284 – 2

0.0

0.0

0.0

4.0

0.1

0.0

0.0

0.0

0.0

12.

70.

2.1

1.6

7.0

2.0

cal data obas measure

obust minerw dominancz vein was t, and later e

e silicates, sotite, chalco pyrite, witted in the msignificant

early 1% chwere only d

M EDS analy that the ms also foundery trace amak height ethe bismuth

Page 4 of 8

MINERA

VB12 – 002 294 m

00

00

00

04

12

07

08

04

00

16

68

12

62

00

08

btained for tement of aral populatice of quartztargeted. Inexaminationseveral sulp

opyrite, sphath the nota

measuremenoccurrence

halcopyrite cdetected at t

ysis of the dmajority of d that the bmount of pexact quanth.

AL MASS PERC

Comp. #39 345 –

0.0

0.0

0.0

13

0.4

0.0

0.0

0.0

0.0

26

58

0.6

0.0

0.2

0.2

the 6 polisha single 2Dions. Howez and mica/cnterestinglyn of the minphides weralerite and gable exceptnt area. Of in the VB1concentratiotrace amoun

detected gothe gold o

bismuth detlatinum. H

tification co

Mineralogy R

CENT (%) IN S

VB12 – 002 355 m

00

00

00

.30

41

06

00

04

00

.99

.00

64

09

24

22

hed sectionsD cross-secever, the indclays in all s, Comp #33eral map wie also detegalena. In mtion of Cothe remaini11 sampleson. The remnts.

old grains doccurred astected with owever, du

ould not be

Report No. MIN

SAMPLE

Comp. #91 18.80 –

0.

0.

0.

23

0.

0.

0.

0.

0.

57

14

0.

3.

0.

0.

s should bectional surfdicative misamples, wh3 indicates ill reveal theected in th

most of the smp #26 wing sulphid

s, with Commaining sph

during the gs both pure the gold we to peak o

e carried ou

N815 (A13575)

VB12 – 010 29.92 m

02

00

02

.50

46

09

00

00

00

7.58

4.53

10

62

02

05

e taken onlyace cannotneralogy of

hich is to bemuch moree reason forhe samples,samples the

with a largees, only the

mp #16 andhalerite and

gold searche gold andwas metallicoverlap andut on trace

)

y t f e e r ,

e e e d d

h d c d e

5.2

The avemineralgrain sisome mparticle

M

Calculate

erage grainl grains andizes are to

minor miner selection.

Mineral Group

Gold

Silver

Bismuth

Pyrite

Pyrrhotite

Chalcopyrit

Sphalerite

Galena

Arsenopyri

Quartz

Mica/Clay

Carbonate

Fe Oxides

Minor Silica

Minor Phas

ed Partic

n size estimd approxima

some exterals can be

ping

e

te

e

ite

s

es

s

tes

ses

cle and G

mations are ated to sphnt under-es affected by

Comp. #16 V349 – 3

27

26

25

29

44

23

48

43

10

72

78

45

59

34

43

Page 5 of 8

Grain Size

produced heres of a cstimated esy the small

AVERA

VB11 – 001 360 m

7

6

5

97

4

32

8

3

02

29

8

5

9

4

3

e

from two-certain diamspecially in l number of

AGE PARTICLE(μm

Comp. #19 380 –

0

2

0

84

3

4

3

4

4

21

8

43

5

3

3

Mineralogy R

dimensionameter. Typic

an unsizedf grains inte

E AND GRAINm) VB11 – 001 391 m

0

3

0

43

7

1

6

7

5

43

7

39

2

1

4

Report No. MIN

al random cally both p

d sample. Sercepted w

N SIZES

Comp. #26 456 –

2

0

2

9

33

11

9

3

3

15

9

4

4

3

3

N815 (A13575)

sections ofparticle andStatistics of

with random

VB11 – 001 467 m

25

0

25

91

36

18

91

33

34

59

92

45

47

32

34

)

f d f

m

M

Mineral Group

Gold

Silver

Bismuth

Pyrite

Pyrrhotite

Chalcopyrit

Sphalerite

Galena

Arsenopyri

Quartz

Mica/Clay

Carbonate

Fe Oxides

Minor Silica

Minor Phas

The calculaas the size occur as “g

Of the minrelative to which are aThe other sdata suggethat the minsufficient

It should albeen givenmeans the

ping

e

te

e

ite

s

es

s

tes

ses

ted average for the bulrains”.

erals forminthe other m

also the twosilicates in test coarse m

mica/clays ar to different

lso be note here, they minimal rep

Comp. #33 V284 – 2

0

0

0

27

35

53

31

27

32

32

11

49

25

28

24

e grain size k material w

ng “grains” minerals, aso samples whe sample a

mica/clays, tre fine graitiate the ind

d that the a only represportable gra

Page 6 of 8

AVERA

VB12 – 002 294 m

0

0

0

77

5

3

1

7

2

2

19

9

5

8

4

data providwall rock an

in the samps is the chawhich contaare generalthe textural ined. This dividual grai

although essent the upain size is ~2

AGE PARTICLE(μm

Comp. #39 345 –

0

0

0

35

5

4

4

7

10

8

15

8

2

2

2

ded here shond vein will

ple, the pyralcopyrite inain the highly fine. It s data from is because

ins.

stimates of pper limit as22 μm.

Mineralogy R

E AND GRAINm) VB12 – 002 355 m

0

0

0

51

4

6

0

6

06

1

57

9

9

6

9

ould be take be over es

rite and pyrn the Compest concenthould be nothe minera the resolut

the gold ans the analys

Report No. MIN

N SIZES

Comp. #91 18.80 –

2

0

2

26

2

6

3

0

7

26

6

3

10

3

3

en as indicastimated as

rrhotite are p #16 and tration of coted that al

al maps woution of the

nd silver grasis resolutio

N815 (A13575)

VB12 – 010 29.92 m

26

0

24

60

29

66

35

0

72

65

68

35

03

37

38

ative values,it does not

very coarseComp #26,halcopyrite.lthough theuld suggest

e analysis is

ain size hasn at 15 μm

)

, t

e , .

e t s

s m

5.3

A false sample, Field im 5.3.1

The minpyrite amica/clagrainedthe goldwith meclearly small gothe mic 5.3.2

The minwith noinclusiocalcite During in the qdue to t 5.3.3

The falshost wathroughsparselypyrrhotsome mmineralcapturesphalerigrain inThe fielquartz v

Textural

colour min, with both m

mages illustr

Comp #16

neral map ond chalcopyay intrusion

d with intergd deportmeetallic bismureflects the old pixels (reous wall ro

Comp #19

neral map o evidence o

ons are cleamineralisatithe gold se

quartz vein. the small nu

Comp #26

se colour mall rock of hout the samy populatedite minerali

mineralisatiolisation, boted in the anite mineralis

ntergrown wld scan was vein.

l Indicati

neral map omineralogic

ating miner

6 VB11-00

of this sampyrite inclusion has also bgrowths of ent in the veuth also inte gold mine

red) dissemiock.

9 VB11-00

of this sampof the mica/crly seen in ion with tharch analys However, umber and s

6 VB11-00

mineral map mica/clay mple with ad by mica/clsation, mainon of chalcth pyrrhotitalysis area isation in the

with pyrrhot also able t

ions (Part

of the sampcal informati

ral maps and

1 349-360

le clearly shons, and finbeen measuquartz. Froein show a erspersed w

eralisation, winated throu

1 380-39

ple also shoclay wall rocthe false co

he pyrite whis only a sinno gold gr

size of the g

1 456-465

of this sammineralogyn area of delay. Unlike nly as a largcopyrite witte and chalis a fracturee sample. Tite/pyrite ano detect a f

Page 7 of 8

ticle Ima

ple is produion and text

d textural ch

0 m

hows the quner grain pyrured and thom the goldnuggety go

with the golwith carefulughout the

1m

ows the quack. As with olour minerhich is not

ngle argentiaains were d

gold grains p

5 m

mple vividlyy. The graenser “large the other V

ge intrusion thin it, but lcopyrite, we near the “The gold send again alsfew pixels o

ages)

uced duringtural inform

haracteristic

artz vein, tarrhotite inclhe image shd search anold dissemind. The greyl examinatioquartz vein,

artz vein dothe VB11-0ral map, bu seen in than gold gra

detected dupresent in th

y shows theain size of er” mica/clayVB11-001 sa at the “top there is a

within the wbase” of thearch analysiso in close of gold alon

Mineralogy R

g the Field ation obtain

c appear in A

argeted for tusions. Withows that talysis of thenated throuy scale imagon of the im, with little t

ominating th01 349-360 t the samphe other twin of ~20 μring the fiehe sample.

quartz veinthe mica/c

y grains andamples, this” of the vein

also a smalwall rock. Ae vein whichis also only association ng a fractur

Report No. MIN

Image ananable from

Appendix II.

this analysisthin the anathe mica/clae sample, e

ughout the qge of the samage reveato none bei

he entire fie m sample, le also show

wo VB11-00m in size w

eld scan, wh

n running tclay seems d areas whics sample shn. The vein ll amount oAn interesth also carrie detected a with metalre running t

N815 (A13575)

lysis of thethe image.

.

s, with largealysis area, aays are fineexamples ofquartz vein,ample morealing all theng found in

eld of view,large pyritews areas of01 samples.as detected

hich may be

through the to changech are moreows mainly also showsof sulphideting featurees the main single goldlic bismuth.through the

)

e

e a e f ,

e e n

, e f .

d e

e e e y s e e n d .

e

5.3.4

The mindenselythan qucalcite avein. Nsample. 5.3.5

The falsmica/clapyrite agold sea 5.3.6

The falsvein divveins. Avein, wpreviouoxide. Aseveral bismuth

Comp #33

neral map fy mineralizeuartz and thand pyrite mo gold was .

Comp. #3

se colour may wall rocknd calcite march analysi

Comp. #9

se colour imverging intoAs with the ith pyrite bs samples tAlthough nsingle pixe

h.

3 VB12-00

for this samed mica/clayhe other is mineralizatio detected ei

9 VB12–00

ineral map k matrix. Asmineralisatiois or the fiel

1 VB12–01

mage obtaino two separa previous sabeing the mthe pyrite mo gold was

el sized go

2 284-294

mple shows ys. One of heavily inton, with evidither during

02 45–355

of this samp with the pr

on. As with ld scan analy

10 18.80–

ned for this ate veins, wamples thermain sulphi

mineralisatio detected dld grains, w

Page 8 of 8

4 m

two veins the veins itergrown widence of qu

g the gold se

5 m

ple also clerevious sam the previoulysis.

–29.92 m

sample repwith the micre is significide mineral

on seems toduring the gwhich are a

running thris, howeverith pyrite. uartz veiningearch analys

arly shows tmple the qua

us sample n

presents a seca/clay wall ant sulphidl detected also be clo

gold search, all closely a

Mineralogy R

rough the h, dominatedThe mica/c

g along the sis or the fie

the quartz vartz vein is hno gold was

ection of throck interpe mineralisain the sam

osely associa the field imassociated a

Report No. MIN

host rock cod by mica/cclay vein als two boundeld scan ana

vein runningheavily inters detected e

he core withosed betweation within

mple. Howeated with a

mage analysalso with t

N815 (A13575)

onsisting ofclays ratherso contains

daries of thealysis of this

g through argrown witheither in the

h the quartzeen the twon the quartzever, unlikereas of ironsis detectedthe metallic

)

f r s e s

a h e

z o z e n d c

MINEERALO

OGY AAPPEN

Mineralogy R

NDICE

Report No. MIN

ES

N815 (A13575))

Qu

uantitatiDetect

MINAP

ive Mineted Gold

NERALPPEND

eralogyd-Silver

LOGY DIX I

y and SEr Minera

Mineralogy R

EM Imagal Grain

Report No. MIN

ges of ns

N815 (A13575))

Mas

s (%

)

Ap

ppendix I - Pagge 1 Mineralogy RReport No. MINN815 (A13575))

G

Grai

Gr

rain 2 – Metallic Bi

Grain 3 - –

Grain 4 – Met

Grain 9 – Met

in 10 – Au/Bi alloy?

rain 1 – 74% Au – 2

i

– Metallic Bi

tallic Bi

tallic Bi

?

Ap

VB1

26% Ag

Grain 8 – Meta

ppendix I - Pag

11-001 349

Field On

NB: Galen

allic Bi

ge 2

9-360 m

ne

na

Mineralogy R

Grain 6

Grain 7 – Met

Matri

Report No. MIN

Grain 5 – 77% A

6 – 75% Au – 25% A

tallic Bi

ix – Quartz

N815 (A13575)

Au – 23% Ag

Ag

)

G

Grain 3

rain 1 – Metallic Bi

Ap

– 100% Au

Ma

ppendix I - Pag

Field Tw

atrix – Quartz

ge 3

wo

Grain

Grain 2

Mineralogy R

1 – 100% Au

– Metallic Bi

Report No. MINN815 (A13575)

)

Grain 5

Grain 2 – 77%

5 – Metallic Bi

Ap

Au – 23% Ag

ppendix I - Pag

Field Thre

G

ge 4

ree

Grain 1 – 93% Au –

Mineralogy R

– 7% Ag

Grain 3 – A

Matr

Report No. MIN

Au/Bi Alloy?

Grain 4

rix – Quartz

N815 (A13575)

4 – Metallic Bi

)

Grain 2 – Met

Ap

tallic Bi

Matrix 2 – Quartz

ppendix I - Pag

Field Fou

z

ge 5

ur

Grain 1 –

Mineralogy R

79% Au – 21% Ag

Report No. MIN

Multiple Grain – G

N815 (A13575)

Matrix 1 – Pyrite

Galena

)

Grain 5 –

Ap

VB1

– 92% Au – 8% Ag

ppendix I - Pag

11-001 380

Field On

ge 6

0-391 m

ne

Mineralogy RReport No. MINN815 (A13575)

)

Silicate – Iron A

Ap

VB1

luminosilicate

ppendix I - Pag

11-001 456

Field On

Grain 2 – Metall

ge 7

6-467m

ne

Grain 1 – 78%

lic Bi

Mineralogy R

% Au – 22% Ag

Matrix

Report No. MIN

x – Pyrrhotite

N815 (A13575)

)

MINAP

Par

NERALPPEND

rticle Im

LOGY DIX II

mages

Mineralogy RReport No. MINN815 (A13575))

The c

colour le

Full Co

BaGoSilvBisPyrPyrChSpGaArsQuMicCaFe MinMin

Ap

egend is apresen

olour Legen

ckgrounldversmuthriterrhotitealcopyrhaleritelenasenopyrartz

ca/Clayrbonate Oxidesnor Silicnor Pha

ppendix II - Pag

applicabnted in th

nd

nd

ritee

rite

ses

catesses

ge 1

ble to all his report

Grey S

BacGolSilvBisPyrPyrChaSphGalArsQuaMicCarFe OMinMin

Minera

Mineralogy R

l particle rt.

Scale Legen

ckgrounldvermuthriterrhotitealcopyrihaleritelenasenopyriartza/ClaysrbonatesOxides

nor Silicanor Phas

al Nam

Report No. MIN

images

nd

d

te

ite

s

atesses

e

N815 (A13575)

)

Comp. #16

Ap

16 VB11 – 00

ppendix II - Pag

001 349-360

ge 2

0 m (Full Co

Mineralogy R

olour Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #1

Ap

16 VB11 – 0

ppendix II - Pag

001 349-360

ge 3

60 m (Grey S

Mineralogy R

Scale Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #19

Ap

19 VB11 – 00

ppendix II - Pag

001 380-391

ge 4

1 m (Full Co

Mineralogy R

olour Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #1

Ap

19 VB11 – 0

ppendix II - Pag

001 380-391

ge 5

1 m (Grey S

Mineralogy R

Scale Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #26

Ap

26 VB11 – 00

ppendix II - Pag

001 456-467

ge 6

7 m (Full Co

Mineralogy R

olour Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. # 2

Ap

26 VB11 – 0

ppendix II - Pag

001 456-467

ge 7

7 m (Full Co

Mineralogy R

Colour Legen

Report No. MIN

end)

N815 (A13575)

)

Comp. #3

Ap

33 VB12 – 00

ppendix II - Pag

002 284-294

ge 8

4 m (Full Co

Mineralogy R

olour Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #3

Ap

33 VB12 – 0

ppendix II - Pag

002 284-294

ge 9

4 m (Grey S

Mineralogy R

Scale Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #39

App

39 VB12 – 00

ppendix II - Pag

002 345-355

ge 10

5 m (Full Co

Mineralogy R

olour Legen

Report No. MIN

nd)

N815 (A13575)

)

Comp. #3

App

39 VB12 – 0

ppendix II - Pag

002 345-355

ge 11

5 m (Grey L

Mineralogy R

Level Legen

Report No. MIN

nd)

N815 (A13575)

)

C

Comp. #91 V

App

VB12 – 010

ppendix II - Pag

0 18.80-29.9

ge 12

92 m (Full C

Mineralogy R

Colour Leg

Report No. MIN

gend)

N815 (A13575)

)

C

Comp. #91

App

1 VB12 – 010

ppendix II - Pag

0 18.80-29.

ge 13

.92 m (Grey

Mineralogy R

y Scale Lege

Report No. MIN

gend)

N815 (A13575)

)

PROJECT A13575

CLIENT VISTA GOLD CORPORATION

TEST DESCRIPTION DRY LIMS MAGNETIC SEPARATION TESTWORK @ 1100G

VB11 003 519-535m COMPOSITE # 79

GRIND P100 : 3.35 mm

DATE Aug-11

MASS

(g) Au, g/t Ag, ppm Cu, ppm Fe, % S, % Mass Au Ag Cu Fe S

MAGS 416.7 0.34 0.6 645 6.34 1.34 8.34 18.09 26.68 27.46 11.01 30.33

NON‐MAGS 4580.7 0.14 0.15 155 4.66 0.28 91.66 81.91 73.32 72.54 88.99 69.67

CALC. FEED 4997.4 0.16 0.19 196 4.80 0.37 100.00 100.00 100.00 100.00 100.00 100.00

ASSAY FEED 5000

SAMPLE

STREAMASSAY Distribution [%]


APPENDIX XIII

Variability Composites (99 Samples)

Head Analysis

Details and Results

ANALYTE UNIT

Au1 g/t 0.42 0.43 1.29 2.16 1.53

Au2 g/t 0.43 0.42 1.20 2.28 1.47

Au3 g/t n/a n/a n/a 2.43 n/a


Ag g/t 0.3 2.5 1.0 1.1 0.8

As ppm 50 50 30 40 20

Al % 6.76 6.92 6.24 6.48 6.08

Ba ppm 400 400 400 300 300

Be ppm 2.2 2.4 1.9 2.1 1.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.15 0.33 0.21 0.18 0.24

Corganic % < 0.03 < 0.03 0.06 0.06 0.09

CO32-

% 0.75 1.65 1.05 0.90 1.20

Ca ppm 7000 7000 4000 4000 4000

Cd ppm < 5 10 < 5 < 5 < 5

Co ppm 25 25 20 25 20

Cr ppm 50 40 60 50 40

Cu ppm 108 168 346 414 656

CN Sol. Cu ppm 26 34 144 116 274

Fe % 5.08 4.90 5.32 5.80 5.20

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.60 2.80 2.80 3.00 2.60

Li ppm 20 20 15 15 10

Mg % 1.32 1.36 1.12 1.16 1.00

Mn ppm 500 700 400 400 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 8640 4220 540 440 500

Ni ppm 55 45 45 40 40

P ppm 600 600 600 600 500

Pb ppm 115 3945 170 140 140Stotal % 0.48 0.92 1.34 1.76 1.66

Ssulfide % 0.40 0.80 1.10 1.48 1.38

Sb ppm 2.5 2.7 1.2 1.1 1.2SiO2 % 66.0 63.4 63.4 62.8 62.8

Sn ppm 50 50 50 50 50

Sr ppm 36 32 16 16 8

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 0.2

Th ppm 14 16 12 14 12

Ti ppm 4000 3800 3800 3600 3400

U ppm 3.3 3.6 3.3 3.4 3.4

V ppm 108 96 98 98 88

Y ppm 26 24 24 24 22

Zn ppm 704 5128 468 246 470

Zr ppm 175 155 175 160 175

True SG g/mL 2.7792 2.7761 2.8051 2.7750 2.8073

COMPOSITE #4

COMPOSITE #5

COMPOSITE #1

COMPOSITE #2

COMPOSITE #3

COMPREHENSIVE HEAD ANALYSIS: VARIABILITY COMPOSITES

A13575 MT TODD PROJECT FEASBILITY STUDY

VISTA GOLD CORPORATION

ANALYTE UNIT

Au1 g/t 1.62 1.76 1.89 1.35 0.91

Au2 g/t 1.58 1.83 2.04 1.36 0.87

Au3 g/t n/a n/a 2.28 n/a n/a


Ag g/t 1.2 1.5 1.2 1.1 0.9

As ppm 40 50 30 70 40

Al % 5.88 6.48 5.68 6.00 5.92

Ba ppm 300 300 300 300 300

Be ppm 1.9 2.1 1.8 1.9 1.9

Bi ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1Ctotal % 0.24 0.18 0.15 0.12 0.12

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 1.20 0.90 0.75 0.60 0.60

Ca ppm 4000 4000 3000 3000 3000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 20 35 25

Cr ppm 40 40 40 50 40

Cu ppm 454 570 698 470 384

CN Sol. Cu ppm 220 284 360 228 170

Fe % 4.68 5.76 5.06 5.50 4.94

Hg ppm 0.7 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.40 2.60 2.40 2.40 2.40

Li ppm 15 20 20 15 15

Mg % 1.08 1.20 1.00 1.24 1.24

Mn ppm 300 300 300 400 400

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 540 320 400 220 480

Ni ppm 40 45 35 40 40

P ppm 600 600 600 700 600

Pb ppm 665 365 655 1100 415Stotal % 1.40 1.56 1.54 1.52 1.24

Ssulfide % 1.20 1.36 1.32 1.24 1.06

Sb ppm 14.3 1.5 1.7 1.5 1.4SiO2 % 55.0 66.6 57.2 66.6 62.2

Sn ppm < 50 < 50 100 50 < 50

Sr ppm 10 10 12 16 12

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 < 0.2

Th ppm 12 12 12 14 12

Ti ppm 3200 3800 3200 3800 3600

U ppm 3.2 3.1 3.2 3.1 3.3

V ppm 94 90 94 100 98

Y ppm 22 24 22 24 22

Zn ppm 1030 894 1018 742 1720

Zr ppm 170 160 165 170 180

True SG g/mL 2.8121 2.7733 2.8195 2.7868 2.7992

COMPOSITE #9

COMPOSITE #10

COMPOSITE #7

COMPOSITE #8

COMPOSITE #6

ANALYTE UNIT

Au1 g/t 0.70 1.08 1.01 0.42 0.54

Au2 g/t 0.70 1.08 0.98 0.42 0.51

Au3 g/t n/a n/a n/a n/a n/a


Ag g/t 1.2 1.0 1.2 3.1 1.0

As ppm 40 40 70 190 50

Al % 6.20 6.92 7.68 7.16 6.60

Ba ppm 300 400 500 400 400

Be ppm 2.0 2.7 3.1 2.8 1.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.15 0.24 0.12 0.21 0.15

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.75 1.20 0.60 0.65 0.75

Ca ppm 3000 4000 3000 6000 4000

Cd ppm 5 5 5 15 < 5

Co ppm 20 25 25 25 20

Cr ppm 40 50 50 40 50

Cu ppm 362 330 228 732 886

CN Sol. Cu ppm 158 156 80 210 438

Fe % 4.78 5.16 5.74 5.16 5.32

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.40 2.80 3.20 2.80 2.80

Li ppm 20 20 20 25 15

Mg % 1.28 1.24 1.32 1.64 1.20

Mn ppm 400 400 400 400 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 540 1660 800 460 1480

Ni ppm 40 40 35 35 50

P ppm 600 600 800 600 600

Pb ppm 825 540 865 6135 350Stotal % 0.92 1.02 1.30 1.38 1.34

Ssulfide % 0.70 0.88 1.12 1.06 1.12

Sb ppm 1.4 1.8 2.2 6.4 1.2SiO2 % 66.8 58.0 59.8 60.8 67.8

Sn ppm < 50 < 50 100 < 50 50

Sr ppm 14 16 18 12 10

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 < 0.2

Th ppm 12 14 16 14 14

Ti ppm 3800 3400 3600 3400 3600

U ppm 3.1 3.5 3.9 3.5 3.1

V ppm 92 96 84 86 86

Y ppm 24 24 28 26 24

Zn ppm 2166 2222 2782 4580 600

Zr ppm 155 160 165 150 160

True SG g/mL 2.7480 2.7983 2.7799 2.8117 2.7554

COMPOSITE #11

COMPOSITE #12

COMPOSITE #13

COMPOSITE #14

COMPOSITE #15

ANALYTE UNIT

Au1 g/t 1.79 1.20 0.93 0.54 1.32

Au2 g/t 1.93 1.22 1.16 0.53 1.32

Au3 g/t 1.81 n/a 1.01 n/a n/a

Au4 g/t 1.86 n/a 0.95 n/a n/a

Ag g/t 1.4 0.8 2.3 2.2 2.1

As ppm 820 20 120 970 410

Al % 6.92 7.00 7.56 6.76 6.72

Ba ppm 500 500 400 400 300

Be ppm 2.4 2.0 2.7 10.8 2.7

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.06 0.06 0.39 0.36 0.81

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.30 0.30 1.95 1.80 4.05

Ca ppm 2000 2000 5000 6000 15000

Cd ppm < 5 < 5 < 5 < 5 10.00

Co ppm 20 15 50 230 40

Cr ppm 40 40 50 50 50

Cu ppm 592 540 1014 1546 1118

CN Sol. Cu ppm 258 156 420 638 508

Fe % 4.52 5.10 5.22 4.72 4.88

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.80 3.00 3.20 2.60 2.80

Li ppm 20 15 25 25 25

Mg % 1.16 1.16 1.64 1.44 1.92

Mn ppm 200 200 500 600 600

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 680 920 340 540 260

Ni ppm 25 35 50 85 40

P ppm 500 500 600 600 700

Pb ppm 195 45 485 620 665Stotal % 1.34 1.56 1.30 1.32 1.74

Ssulfide % 1.08 1.24 1.20 1.22 1.48

Sb ppm 1.7 0.6 2.8 7.1 3.2SiO2 % 62.6 63.6 61.0 64.6 62.0

Sn ppm 100 100 50 50 100

Sr ppm 8 8 12 8 10

Te ppm 0.4 0.6 < 0.2 < 0.2 0.4

Th ppm 16 14 16 14 14

Ti ppm 2600 3000 3400 3400 3200

U ppm 4.3 3.6 3.4 3.1 3.0

V ppm 60 72 80 84 78

Y ppm 26 24 28 24 24

Zn ppm 188 48 1008 972 4654

Zr ppm 170 165 145 150 140

True SG g/mL 2.7564 2.7994 2.7898 2.8844 2.8167

COMPOSITE #17

COMPOSITE #18

COMPOSITE #19

COMPOSITE #16

COMPOSITE #20

ANALYTE UNIT

Au1 g/t 1.22 0.86 0.90 1.46 1.93

Au2 g/t 1.14 0.74 0.72 1.43 2.14

Au3 g/t n/a 0.95 1.00 n/a 2.10

Au4 g/t n/a 1.01 0.84 n/a 2.23

Ag g/t 1.1 0.4 0.4 0.5 1.0

As ppm 30 20 10 180 30

Al % 7.52 6.80 7.88 8.08 7.08

Ba ppm 400 700 500 500 500

Be ppm 2.7 2.6 2.3 2.5 2.6

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % < 0.03 < 0.03 0.03 0.09 0.06

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% < 0.03 < 0.03 0.15 0.45 0.30

Ca ppm 2000 2000 3000 2000 2000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 15 15 20 15

Cr ppm 50 50 40 50 20

Cu ppm 1100 510 522 464 742

CN Sol. Cu ppm 480 100 78 106 210

Fe % 5.60 4.88 5.62 5.60 4.68

Hg ppm < 0.1 < 0.1 3.2 < 0.1 < 0.1

K % 3.20 3.20 3.80 3.60 3.60

Li ppm 20 20 20 15 15

Mg % 1.20 1.08 1.12 1.16 0.80

Mn ppm 200 200 300 200 200

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 580 720 180 640 520

Ni ppm 40 40 40 35 25

P ppm 700 600 600 600 500

Pb ppm 340 40 35 55 60Stotal % 2.06 1.50 1.48 1.60 1.66

Ssulfide % 1.70 1.16 1.20 1.16 1.42

Sb ppm 1.1 0.8 0.6 0.7 0.5SiO2 % 62.4 55.6 63.0 61.2 66.2

Sn ppm 100 50 100 100 100

Sr ppm 12 10 16 10 10

Te ppm < 0.2 0.2 < 0.2 < 0.2 0.2

Th ppm 14 12 14 16 20

Ti ppm 3400 3200 3600 3200 2000

U ppm 3.3 3.5 2.3 3.9 4.7

V ppm 86 86 66 74 36

Y ppm 24 22 26 26 28

Zn ppm 562 80 38 36 56

Zr ppm 145 150 55 150 140

True SG g/mL 2.7880 2.8099 2.7746 2.8277 2.7527

COMPOSITE #21

COMPOSITE #22

COMPOSITE #23

COMPOSITE #24

COMPOSITE #25

ANALYTE UNIT

Au1 g/t 1.01 0.71 0.51 2.31 3.83

Au2 g/t 1.04 0.70 0.54 2.35 3.76



Ag g/t 0.6 0.5 0.5 1.4 1.9

As ppm < 10 60 50 110 11100

Al % 8.84 9.20 8.72 7.60 6.44

Ba ppm 600 600 600 700 700

Be ppm 3.0 3.2 2.5 3.1 2.6

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % < 0.03 < 0.03 < 0.03 0.06 0.12

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% < 0.03 < 0.03 < 0.03 30.00 0.60

Ca ppm 2000 3000 3000 2000 3000

Cd ppm < 5 < 5 < 5 < 5 30

Co ppm 15 20 15 20 25

Cr ppm 50 60 50 50 30

Cu ppm 662 4740 522 528 680

CN Sol. Cu ppm 122 96 96 238 268

Fe % 5.88 5.68 5.62 5.00 4.78

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 4.40 4.20 4.00 3.20 2.60

Li ppm 20 25 20 20 15

Mg % 1.20 1.24 1.04 1.24 0.92

Mn ppm 200 300 200 300 200

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 680 1040 2400 3360 3860

Ni ppm 40 40 40 35 30

P ppm 600 600 600 600 500

Pb ppm 50 55 40 335 190Stotal % 1.56 1.10 1.38 0.90 2.10

Ssulfide % 1.24 0.88 1.02 0.72 1.98

Sb ppm 0.8 1.8 0.4 1.3 5.8SiO2 % 60.8 58.8 61.4 65.4 66.0

Sn ppm 100 150 50 100 < 50

Sr ppm 10 10 12 12 10

Te ppm < 0.2 < 0.2 < 0.2 0.2 0.4

Th ppm 18 16 18 18 16

Ti ppm 3600 3600 3600 3200 2000

U ppm 3.4 3.6 3.6 3.7 4.1

V ppm 84 88 76 76 40

Y ppm 28 28 28 28 28

Zn ppm 70 108 42 766 446

Zr ppm 145 140 150 170 165

True SG g/mL 2.8111 2.7773 2.7981 2.7987 2.7904


A13575 MT TODD PROJECT FEASBILITY STUDY


COMPOSITE #26

COMPOSITE #27

COMPOSITE #28

COMPOSITE #29

COMPOSITE #30

ANALYTE UNIT

Au1 g/t 0.57 0.33 0.23 0.39 0.36

Au2 g/t 0.52 0.36 0.22 0.37 0.39



Ag g/t 1.1 1.0 1.0 8.4 1.4

As ppm 110 150 40 140 50

Al % 7.28 5.80 8.48 7.36 6.64

Ba ppm 700 400 500 500 400

Be ppm 3.0 2.9 3.4 5.1 4.0

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.09 0.51 0.18 0.63 0.18

Corganic % < 0.03 0.06 < 0.03 < 0.03 < 0.03

CO32-

% 0.45 2.55 0.90 3.15 0.90

Ca ppm 3000 7000 4000 7000 4000

Cd ppm < 5 < 5 < 5 25 5

Co ppm 15 35 20 60 25

Cr ppm 30 40 50 50 50

Cu ppm 250 156 122 762 312

CN Sol. Cu ppm 104 60 66 72 90

Fe % 4.20 3.80 5.12 5.40 4.88

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.00 2.40 3.40 3.40 3.00

Li ppm 25 25 25 25 20

Mg % 1.32 1.40 1.56 2.04 1.32

Mn ppm 300 400 400 900 400

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 1680 1340 2600 1000 2300

Ni ppm 25 45 30 50 45

P ppm 500 600 700 400 400

Pb ppm 535 715 200 2110 545Stotal % 0.52 0.40 0.30 0.90 1.04

Ssulfide % 0.48 0.32 0.22 0.90 1.04

Sb ppm 1.5 3.6 1.6 5.7 2.0SiO2 % 68.8 55.2 61.6 59.4 66.8

Sn ppm 150 50 50 < 50 50

Sr ppm 8 12 14 8 10

Te ppm < 0.2 < 0.2 < 0.2 0.6 0.4

Th ppm 18 12 18 16 14

Ti ppm 2800 2800 3400 3400 3600

U ppm 4.1 3.1 3.6 3.0 3.2

V ppm 58 80 82 84 88

Y ppm 28 20 28 26 22

Zn ppm 750 614 450 7402 2014

Zr ppm 185 150 155 140 165

True SG g/mL 2.7729 2.7434 2.7919 2.8326 2.7989

COMPOSITE #32

COMPOSITE #33

COMPOSITE #34

COMPOSITE #35

COMPOSITE #31

ANALYTE UNIT

Au1 g/t 0.86 1.25 0.75 3.04 1.04

Au2 g/t 0.91 1.18 0.68 3.79 1.10



Ag g/t 2.2 2.0 1.3 0.7 0.7

As ppm 90 180 320 60 40

Al % 7.12 6.56 8.04 7.48 7.72

Ba ppm 400 400 500 500 500

Be ppm 3.5 3.8 4.1 3.8 4.3

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.18 0.30 0.21 0.15 0.09

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.90 1.50 1.05 0.75 0.45

Ca ppm 5000 7000 5000 3000 3000

Cd ppm 10 < 5 < 5 < 5 < 5

Co ppm 20 25 60 15 20

Cr ppm 50 50 60 50 60

Cu ppm 486 642 680 820 842

CN Sol. Cu ppm 128 120 240 50 42

Fe % 4.80 5.10 5.72 5.94 6.28

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.20 3.00 3.40 3.40 3.60

Li ppm 20 20 25 20 15

Mg % 1.44 1.48 1.52 1.20 1.24

Mn ppm 300 500 600 300 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 1040 1020 1060 920 1040

Ni ppm 40 40 45 35 30

P ppm 300 400 500 400 400

Pb ppm 1360 685 650 40 75Stotal % 1.34 1.50 1.34 1.70 1.92

Ssulfide % 1.32 1.50 1.34 1.52 1.86

Sb ppm 1.9 2.5 2.9 1.1 1.2SiO2 % 66.0 65.4 60.4 64.0 64.4

Sn ppm 50 < 50 < 50 50 < 50

Sr ppm 8 10 10 8 8

Te ppm 0.6 0.2 0.2 0.4 0.4

Th ppm 16 12 16 14 14

Ti ppm 3400 3400 3400 3400 3600

U ppm 3.2 3.1 3.4 3.3 3.4

V ppm 86 84 94 86 88

Y ppm 26 22 26 26 24

Zn ppm 2966 1886 1368 176 342

Zr ppm 155 155 140 150 145

True SG g/mL 2.7745 2.8198 2.7987 2.8385 2.8066

COMPOSITE #36

COMPOSITE #37

COMPOSITE #38

COMPOSITE #39

COMPOSITE #40

ANALYTE UNIT

Au1 g/t 1.90 1.18 0.64 2.25 3.78

Au2 g/t 1.97 1.27 0.64 2.10 3.77



Ag g/t 0.6 0.7 < 0.3 1.4 2.0

As ppm 20 20 10 60 30

Al % 7.72 7.36 8.28 6.96 8.32

Ba ppm 500 500 600 600 600

Be ppm 3.7 4.4 4.9 5.6 4.2

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.06 0.09 0.12 0.12 0.09

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.30 0.45 0.60 0.60 0.45

Ca ppm 2000 3000 3000 3000 3000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 15 15 25

Cr ppm 50 50 40 20 50

Cu ppm 492 498 370 652 1088

CN Sol. Cu ppm 204 74 104 86 166

Fe % 6.16 5.70 5.24 5.10 7.14

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.60 3.40 4.00 3.80 3.80

Li ppm 20 30 20 15 20

Mg % 1.20 1.32 1.28 0.84 1.20

Mn ppm 300 300 300 300 400

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 920 980 1000 780 1120

Ni ppm 40 40 30 30 40

P ppm 400 300 400 300 400

Pb ppm 15 25 10 265 70Stotal % 1.82 1.48 1.10 2.04 2.50

Ssulfide % 1.70 1.40 1.00 1.84 2.38

Sb ppm 1.1 1.7 0.9 1.3 1.3SiO2 % 63.6 63.8 64.2 66.6 60.8

Sn ppm 50 50 100 50 50

Sr ppm 8 14 10 12 12

Te ppm 0.2 0.2 < 0.2 0.2 0.4

Th ppm 14 14 18 24 14

Ti ppm 3600 3600 2800 1600 3400

U ppm 3.3 3.3 4.5 5.7 3.4

V ppm 90 88 66 24 80

Y ppm 24 24 30 30 26

Zn ppm 76 84 124 814 434

Zr ppm 155 155 175 160 140

True SG g/mL 2.8388 2.7812 2.8219 2.7752 2.8815

COMPOSITE #41

COMPOSITE #42

COMPOSITE #45

COMPOSITE #43

COMPOSITE #44

ANALYTE UNIT

Au1 g/t 0.44 0.62 0.41 0.44 1.04

Au2 g/t 0.50 0.60 0.42 0.41 1.21

Au3 g/t n/a n/a n/a n/a 0.97


Ag g/t 0.5 0.5 1.6 0.6 1.0

As ppm < 10 20 630 < 10 20

Al % 8.48 8.84 8.32 8.68 8.00

Ba ppm 600 600 500 600 500

Be ppm 4.3 5.3 4.4 4.9 4.5

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.03 0.06 0.06 0.06 < 0.03

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.15 0.30 0.30 0.30 < 0.03

Ca ppm 3000 2000 2000 3000 2000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 15 15 20 15 15

Cr ppm 50 60 50 50 50

Cu ppm 390 536 868 622 926

CN Sol. Cu ppm 58 156 150 80 48

Fe % 5.76 6.06 6.52 6.24 6.26

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 4.20 4.20 3.60 4.20 3.80

Li ppm 20 20 20 20 15

Mg % 1.20 1.24 1.16 1.28 1.04

Mn ppm 300 300 400 300 200

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 960 980 1180 1060 720

Ni ppm 40 35 35 30 35

P ppm 400 400 500 500 400

Pb ppm 10 15 115 5 10Stotal % 1.28 1.20 1.58 1.30 2.04

Ssulfide % 1.20 1.08 1.44 1.20 1.82

Sb ppm 0.8 1.1 2.3 0.8 0.8SiO2 % 61.4 59.2 62.0 60.8 63.2

Sn ppm 50 100 < 50 < 50 100

Sr ppm 14 12 12 12 8

Te ppm < 0.2 < 0.2 0.2 0.2 0.2

Th ppm 16 16 16 18 16

Ti ppm 3400 3400 3200 3200 3400

U ppm 3.7 3.4 3.9 4.3 3.7

V ppm 66 82 78 76 74

Y ppm 26 26 26 28 26

Zn ppm 44 76 280 62 40

Zr ppm 160 140 155 140 160

True SG g/mL 2.7958 2.8343 2.8088 2.7878 2.8419

COMPOSITE #46

COMPOSITE #47

COMPOSITE #48

COMPOSITE #49

COMPOSITE #50

ANALYTE UNIT

Au1 g/t 0.62 0.62 0.98 0.29 0.13

Au2 g/t 0.64 0.67 0.84 0.26 0.11



Ag g/t 0.8 0.7 1.0 0.5 0.4

As ppm < 10 10 10 780 80

Al % 7.28 7.68 8.84 8.56 7.96

Ba ppm 500 600 600 600 500

Be ppm 4.8 4.4 5.1 4.5 4.5

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.03 < 0.03 < 0.03 < 0.03 0.09

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.15 < 0.03 < 0.03 < 0.03 0.45

Ca ppm 2000 3000 4000 3000 5000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 10 15 20 20 20

Cr ppm 30 50 50 50 50

Cu ppm 784 614 808 310 358

CN Sol. Cu ppm 46 98 50 118 354

Fe % 5.02 4.74 6.12 5.60 5.30

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 4.00 4.00 4.40 4.20 3.80

Li ppm 15 15 20 15 15

Mg % 0.92 1.00 1.16 1.12 1.04

Mn ppm 200 200 300 300 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 980 2580 2400 3420 3480

Ni ppm 30 35 40 40 35

P ppm 200 400 400 400 400

Pb ppm < 5 < 5 < 5 < 5 5Stotal % 1.48 0.94 1.30 0.94 0.98

Ssulfide % 1.32 0.82 1.24 0.90 0.88

Sb ppm 0.5 0.4 0.7 1.1 1.2SiO2 % 67.2 65.4 61.8 61.4 65.2

Sn ppm 50 < 50 50 < 50 100

Sr ppm 8 12 18 14 14

Te ppm 0.2 < 0.2 0.4 1.0 0.4

Th ppm 26 18 16 18 16

Ti ppm 2400 3000 3600 3600 3400

U ppm 6.3 4.6 3.8 3.7 3.7

V ppm 40 64 82 80 78

Y ppm 30 26 28 28 26

Zn ppm 24 26 30 24 40

Zr ppm 160 165 145 155 170

True SG g/mL 2.7583 2.7860 2.7790 2.8149 2.7832

COMPOSITE #51

COMPOSITE #52

COMPOSITE #53

COMPOSITE #54

COMPOSITE #55


A13575 MT TODD PROJECT FEASABILITY STUDY


ANALYTE UNIT

Au1 g/t 0.72 1.56 0.53 0.31 0.25

Au2 g/t 0.80 1.37 0.59 0.37 0.26

Au3 g/t n/a 1.36 n/a n/a n/a

Au4 g/t n/a 1.33 n/a n/a n/a

Ag g/t 0.3 0.4 < 0.3 0.5 0.4

As ppm 20 80 30 340 140

Al % 7.44 7.32 7.12 6.72 6.36

Ba ppm 600 600 600 500 400

Be ppm 4.9 4.7 4.7 4.5 4.0

Bi ppm < 10 10 < 10 < 10 < 10Ctotal % 0.12 0.09 0.12 0.12 0.18

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 0.06

CO32-

% 0.60 0.45 0.60 0.60 0.60

Ca ppm 6000 5000 11000 7000 5000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 25 20 20

Cr ppm 50 40 40 50 40

Cu ppm 216 328 200 150 136

CN Sol. Cu ppm 110 284 98 132 54

Fe % 5.94 5.30 5.40 5.02 4.96

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.80 3.60 3.20 2.40 2.40

Li ppm 25 30 30 20 15

Mg % 1.28 1.12 1.36 1.28 1.24

Mn ppm 500 400 500 500 400

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 1660 1860 7460 9700 7620

Ni ppm 40 35 45 45 40

P ppm 400 400 500 400 400

Pb ppm 45 10 15 120 85Stotal % 0.72 0.72 0.24 0.34 0.36

Ssulfide % 0.62 0.64 0.20 0.32 0.30

Sb ppm 1.0 1.1 0.7 1.0 1.4SiO2 % 64.2 63.2 64.6 65.8 67.4

Sn ppm < 50 < 50 < 50 < 50 50

Sr ppm 26 22 78 36 30

Te ppm 0.2 0.2 < 0.2 < 0.2 < 0.2

Th ppm 14 16 16 14 14

Ti ppm 3600 3200 4000 4000 4000

U ppm 3.4 3.6 3.4 3.4 3.1

V ppm 88 74 100 100 98

Y ppm 26 26 26 24 24

Zn ppm 190 66 86 222 80

Zr ppm 155 170 180 185 190

True SG g/mL 2.8089 2.7702 2.7872 2.7425 2.7372

COMPOSITE #56

COMPOSITE #57

COMPOSITE #58

COMPOSITE #59

COMPOSITE #60

ANALYTE UNIT

Au1 g/t 0.51 0.58 0.69 0.50 0.53

Au2 g/t 0.51 0.54 0.64 0.56 0.59



Ag g/t 0.6 0.5 0.9 0.3 0.4

As ppm 110 150 90 30 30

Al % 7.00 6.48 7.24 6.96 6.28

Ba ppm 500 500 500 700 400

Be ppm 4.7 4.1 4.9 4.8 3.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.11 0.12 0.09 0.21 0.27

Corganic % 0.03 < 0.03 < 0.03 0.03 0.09

CO32-

% 0.40 0.60 0.45 0.90 0.90

Ca ppm 6000 3000 5000 18000 7000

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 20 30 20

Cr ppm 40 40 40 20 40

Cu ppm 154 238 342 130 178

CN Sol. Cu ppm 82 194 72 192 214

Fe % 5.50 4.96 5.80 6.80 4.90

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.00 2.80 3.60 3.20 3.00

Li ppm 20 15 20 15 15

Mg % 1.48 1.16 1.28 1.52 1.08

Mn ppm 400 300 400 800 500

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 7240 2620 1740 6460 2480

Ni ppm 35 35 30 25 35

P ppm 500 400 400 1100 400

Pb ppm 355 190 150 20 145Stotal % 0.50 0.84 1.18 0.98 0.68

Ssulfide % 0.46 0.70 0.98 0.78 0.54

Sb ppm 1.2 1.6 1.2 0.8 1.4SiO2 % 63.4 68.0 65.0 60.4 67.0

Sn ppm 50 < 50 < 50 < 50 < 50

Sr ppm 38 14 22 102 18

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 < 0.2

Th ppm 14 16 16 14 14

Ti ppm 3800 3200 3600 5800 3600

U ppm 3.4 4.0 3.6 3.4 3.0

V ppm 96 72 82 160 92

Y ppm 26 26 26 28 24

Zn ppm 680 478 270 134 342

Zr ppm 170 170 165 180 175

True SG g/mL 2.7906 2.7660 2.8152 2.7950 2.7989

COMPOSITE #61

COMPOSITE #62

COMPOSITE #63

COMPOSITE #64

COMPOSITE #65

ANALYTE UNIT

Au1 g/t 1.06 0.94 1.36 1.62 2.68

Au2 g/t 1.00 0.92 1.25 1.47 2.72

Au3 g/t n/a n/a 1.23 1.52 n/a

Au4 g/t n/a n/a 1.18 1.56 n/a

Ag g/t 0.6 0.3 0.6 0.6 0.5

As ppm 30 50 30 20 10

Al % 6.40 7.08 6.72 6.36 6.36

Ba ppm 400 400 500 400 400

Be ppm 4.1 3.7 3.7 4.5 3.7

Bi ppm < 10 < 10 < 10 < 10 10Ctotal % 0.21 0.12 0.12 0.12 0.09

Corganic % 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.90 0.60 0.60 0.60 0.45

Ca ppm 5000 5500 4900 3900 4750

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 20 20 20

Cr ppm 40 40 40 40 30

Cu ppm 236 336 398 596 544

CN Sol. Cu ppm 244 86 110 118 234

Fe % 5.30 6.00 5.92 5.60 6.14

Hg ppm < 0.1 0.1 < 0.1 < 0.1 < 0.1

K % 2.80 2.60 2.80 2.40 2.60

Li ppm 15 15 20 15 15

Mg % 1.12 1.12 1.12 1.08 1.08

Mn ppm 500 500 600 500 500

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 980 860 400 260 480

Ni ppm 35 35 35 40 40

P ppm 400 400 400 400 400

Pb ppm 295 10 15 15 225Stotal % 0.98 1.12 1.10 1.42 1.82

Ssulfide % 0.78 0.98 0.90 1.10 1.32

Sb ppm 1.4 1.2 1.5 1.5 1.2SiO2 % 67.8 67.6 66.8 60.6 64.4

Sn ppm < 50 100 < 50 50 100

Sr ppm 12 14 14 10 14

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 0.2

Th ppm 14 14 14 16 14

Ti ppm 3800 4000 4000 3400 3800

U ppm 3.1 3.1 3.1 3.2 3.3

V ppm 94 94 94 86 88

Y ppm 24 24 24 24 24

Zn ppm 304 52 58 62 90

Zr ppm 180 155 165 160 175

True SG g/mL 2.7699 2.8278 2.8132 2.7853 2.8340

COMPOSITE #66

COMPOSITE #67

COMPOSITE #68

COMPOSITE #69

COMPOSITE #70

ANALYTE UNIT

Au1 g/t 1.11 0.45 0.60 0.48 0.19

Au2 g/t 1.15 0.43 0.52 0.46 0.22



Ag g/t < 0.3 < 0.3 0.7 < 0.3 0.4

As ppm 80 20 120 20 40

Al % 6.20 6.16 6.36 6.88 7.44

Ba ppm 400 300 300 400 400

Be ppm 3.4 3.7 3.9 4.1 4.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.09 0.06 0.30 0.12 0.06

Corganic % < 0.03 < 0.03 0.06 < 0.03 < 0.03

CO32-

% 0.45 0.30 1.20 0.60 0.30

Ca ppm 3750 3100 9100 3300 2600

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 25 20 20 20 20

Cr ppm 40 40 40 40 40

Cu ppm 226 208 530 246 184

CN Sol. Cu ppm 48 40 204 94 72

Fe % 5.14 4.92 5.04 5.24 5.16

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.20 2.20 2.20 2.40 2.60

Li ppm 15 15 15 20 20

Mg % 1.24 1.40 1.68 1.36 1.48

Mn ppm 400 400 600 500 500

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 4460 3300 1440 4620 4680

Ni ppm 40 35 40 35 35

P ppm 400 400 400 400 500

Pb ppm 10 20 150 45 595Stotal % 0.88 0.62 0.70 0.70 0.44

Ssulfide % 0.64 0.54 0.62 0.54 0.34

Sb ppm 1.0 0.8 2.4 1.2 1.4SiO2 % 67.2 67.4 67.2 71.4 70.0

Sn ppm < 50 < 50 350 50 50

Sr ppm 16 14 10 14 14

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 < 0.2

Th ppm 12 12 12 12 14

Ti ppm 4000 4000 4000 4200 4200

U ppm 3.0 2.8 2.8 3.0 3.1

V ppm 102 100 92 92 98

Y ppm 22 22 22 22 24

Zn ppm 46 32 538 148 908

Zr ppm 180 175 160 165 170

True SG g/mL 2.7633 2.7837 2.7565 2.7932 2.7510

COMPOSITE #71

COMPOSITE #72

COMPOSITE #73

COMPOSITE #74

COMPOSITE #75

ANALYTE UNIT

Au1 g/t 0.48 0.44 0.38 0.13 0.47

Au2 g/t 0.43 0.40 0.42 0.13 0.58



Ag g/t 0.5 0.5 1.2 0.5 < 0.3

As ppm 70 80 40 40 60

Al % 8.08 6.84 7.88 7.16 7.48

Ba ppm 500 400 500 400 500

Be ppm 5.1 4.2 5.3 5.4 3.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.09 0.09 0.12 0.12 < 0.03

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.45 0.45 0.60 0.60 < 0.03

Ca ppm 2650 3750 4600 4450 1050

Cd ppm < 5 < 5 15 < 5 < 5

Co ppm 20 20 30 25 20

Cr ppm 40 40 40 40 50

Cu ppm 256 238 468 140 238

CN Sol. Cu ppm 84 86 172 74 204

Fe % 6.04 5.24 6.24 4.76 5.16

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.20 2.20 2.80 2.40 2.60

Li ppm 20 15 20 20 20

Mg % 1.44 1.24 1.40 1.24 1.44

Mn ppm 400 500 600 500 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 3220 7520 5400 7680 3500

Ni ppm 40 40 30 35 35

P ppm 500 300 500 400 300

Pb ppm 605 445 1215 635 25Stotal % 0.94 0.74 1.00 0.36 0.82

Ssulfide % 0.80 0.50 0.84 0.26 0.72

Sb ppm 1.7 1.4 2.3 1.3 0.9SiO2 % 64.4 67.6 62.6 64.6 67.2

Sn ppm 100 < 50 150 < 50 100

Sr ppm 16 24 26 32 10

Te ppm < 0.2 < 0.2 < 0.2 < 0.2 0.4

Th ppm 18 14 16 14 14

Ti ppm 4000 3800 3400 3600 3800

U ppm 3.1 3.2 3.3 3.5 3.0

V ppm 94 90 82 86 92

Y ppm 26 24 24 22 24

Zn ppm 864 306 4148 1032 74

Zr ppm 180 170 140 150 160

True SG g/mL 2.8181 2.7528 2.8224 2.7418 2.8062

COMPOSITE #79

COMPOSITE #80

COMPOSITE #76

COMPOSITE #77


A13575 MT TODD PROJECT FEASABILITY STUDY


COMPOSITE #78

ANALYTE UNIT

Au1 g/t 0.61 0.38 0.18 0.54 0.54

Au2 g/t 0.61 0.34 0.19 0.49 0.48



Ag g/t < 0.3 < 0.3 < 0.3 0.4 0.4

As ppm 40 30 30 20 20

Al % 7.12 7.92 7.04 7.20 8.40

Ba ppm 400 400 400 400 500

Be ppm 4.1 5.0 5.0 4.4 5.8

Bi ppm < 10 10 < 10 < 10 < 10Ctotal % 0.03 0.06 0.03 0.09 0.06

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.15 0.30 0.15 0.45 0.30

Ca ppm 2000 550 600 2350 1600

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 25 25 20 20

Cr ppm 50 50 40 50 50

Cu ppm 230 162 148 304 258

CN Sol. Cu ppm 184 134 80 134 100

Fe % 5.24 5.38 4.58 5.24 5.70

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.40 2.80 2.60 2.40 3.60

Li ppm 20 15 20 20 20

Mg % 1.28 1.28 1.20 1.24 1.36

Mn ppm 300 400 300 400 400

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 4760 800 1780 4420 820

Ni ppm 45 40 45 40 40

P ppm 400 300 200 500 500

Pb ppm 15 105 80 55 30Stotal % 0.82 0.78 0.70 0.86 1.04

Ssulfide % 0.70 0.68 0.62 0.74 0.90

Sb ppm 0.8 1.1 1.1 0.7 1.0SiO2 % 64.4 64.8 62.2 66.2 59.8

Sn ppm < 50 50 < 50 100 50

Sr ppm 16 6 8 12 10

Te ppm 0.6 0.6 0.2 0.2 0.2

Th ppm 14 16 16 14 16

Ti ppm 3800 3800 3400 3800 3400

U ppm 3.1 3.2 3.6 3.2 3.5

V ppm 98 98 80 92 88

Y ppm 22 24 24 22 26

Zn ppm 72 192 276 200 128

Zr ppm 170 160 185 170 150

True SG g/mL 2.7570 2.8207 2.7533 2.7975 2.7915

COMPOSITE #81

COMPOSITE #82

COMPOSITE #83

COMPOSITE #84

COMPOSITE #85

ANALYTE UNIT

Au1 g/t 1.26 0.85 1.25 0.53 0.38

Au2 g/t 1.44 0.67 1.21 0.40 0.38



Ag g/t 0.4 0.6 0.5 0.7 < 0.3

As ppm 10 20 130 20 40

Al % 8.76 6.80 6.32 7.12 7.40

Ba ppm 500 400 400 500 400

Be ppm 4.5 3.3 3.3 3.6 3.8

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % 0.06 0.03 0.06 0.06 0.03

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.30 0.15 0.30 0.30 0.15

Ca ppm 600 900 950 1000 1150

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 20 20 20

Cr ppm 50 40 40 50 50

Cu ppm 460 824 516 934 176

CN Sol. Cu ppm 76 140 124 304 118

Fe % 6.22 6.42 5.40 5.76 5.30

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 3.40 2.40 2.20 2.60 2.40

Li ppm 20 15 15 15 20

Mg % 1.40 1.12 1.12 1.20 1.40

Mn ppm 300 300 300 300 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 720 440 640 460 4440

Ni ppm 35 40 35 35 40

P ppm 400 400 400 400 400

Pb ppm 15 10 15 60 20Stotal % 1.30 2.10 1.42 1.60 0.78

Ssulfide % 1.10 1.60 1.24 1.40 0.70

Sb ppm 0.8 0.8 0.7 0.9 0.9SiO2 % 63.8 65.6 64.0 67.4 67.4

Sn ppm 150 50 50 100 50

Sr ppm 4 4 4 6 10

Te ppm 0.4 0.4 0.6 0.4 0.2

Th ppm 16 12 12 12 12

Ti ppm 3600 3800 3600 3600 3800

U ppm 3.3 3.0 2.9 2.9 3.1

V ppm 90 92 86 86 96

Y ppm 26 24 22 24 24

Zn ppm 34 40 32 252 48

Zr ppm 145 175 180 150 170

True SG g/mL 2.8331 2.7928 2.8119 2.3727 2.7863

COMPOSITE #86

COMPOSITE #87

COMPOSITE #88

COMPOSITE #89

COMPOSITE #90

ANALYTE UNIT

Au1 g/t 0.64 0.42 0.19 0.30 0.60

Au2 g/t 0.62 0.41 0.18 0.29 0.59

Au3 g/t 0.63 0.45 n/a 0.33 n/a

Au4 g/t 0.61 0.43 n/a 0.30 n/a

Ag g/t 0.3 0.5 < 0.3 0.4 0.7

As ppm 20 50 30 20 20

Al % 8.08 7.44 7.12 8.16 8.28

Ba ppm 600 400 400 400 500

Be ppm 5.0 4.6 4.5 5.1 5.9

Bi ppm < 10 < 10 < 10 < 10 < 10Ctotal % < 0.03 0.03 0.03 0.09 0.06

Corganic % < 0.03 < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% < 0.03 0.15 0.15 0.45 0.30

Ca ppm 1050 1350 2150 900 650

Cd ppm < 5 < 5 < 5 < 5 < 5

Co ppm 20 20 20 20 20

Cr ppm 50 40 50 50 50

Cu ppm 220 222 144 210 532

CN Sol. Cu ppm 152 124 54 86 186

Fe % 5.28 5.12 5.02 5.58 6.28

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1 < 0.1

K % 2.80 2.80 2.40 3.20 3.20

Li ppm 20 20 20 20 20

Mg % 1.28 1.28 1.28 1.28 1.28

Mn ppm 300 400 400 400 300

Mo ppm < 5 < 5 < 5 < 5 < 5

Na ppm 3600 1660 4080 1620 680

Ni ppm 35 35 40 35 40

P ppm 400 200 500 400 400

Pb ppm 10 85 25 65 105Stotal % 0.82 0.82 0.70 0.84 1.82

Ssulfide % 0.74 0.80 0.60 0.76 1.44

Sb ppm 0.9 0.9 0.8 0.9 1.0SiO2 % 63.6 67.4 66.2 63.0 59.8

Sn ppm < 50 50 < 50 50 50

Sr ppm 8 10 14 8 6

Te ppm 0.4 0.4 0.4 0.2 0.2

Th ppm 16 14 12 14 14

Ti ppm 3400 3600 3800 3600 3400

U ppm 3.6 3.2 3.1 3.2 3.4

V ppm 82 78 90 88 88

Y ppm 26 26 24 24 26

Zn ppm 60 286 54 320 348

Zr ppm 175 165 165 155 140

True SG g/mL 2.8023 2.7635 2.7857 2.7853 2.8451

COMPOSITE #95

COMPOSITE #91

COMPOSITE #92

COMPOSITE #93

COMPOSITE #94

ANALYTE UNIT

Au1 g/t 0.67 0.73 0.81 0.33

Au2 g/t 0.58 0.56 0.66 0.38

Au3 g/t n/a 0.43 1.04 n/a

Au4 g/t n/a 0.47 0.76 n/a

Ag g/t 0.4 0.5 1.0 0.3

As ppm 20 40 30 10

Al % 6.88 6.72 7.56 6.76

Ba ppm 500 500 500 500

Be ppm 3.4 3.7 4.4 4.0

Bi ppm < 10 < 10 < 10 < 10Ctotal % 0.06 0.06 0.09 < 0.03

Corganic % < 0.03 < 0.03 < 0.03 < 0.03

CO32-

% 0.30 0.30 0.45 < 0.03

Ca ppm 1100 1100 950 950

Cd ppm < 5 < 5 < 5 < 5

Co ppm 15 20 25 20

Cr ppm 50 40 50 50

Cu ppm 274 702 738 536

CN Sol. Cu ppm 68 174 212 112

Fe % 5.32 5.62 7.06 5.56

Hg ppm < 0.1 < 0.1 < 0.1 < 0.1

K % 2.60 2.40 2.80 2.40

Li ppm 15 15 15 15

Mg % 1.20 1.16 1.28 1.16

Mn ppm 300 300 300 200

Mo ppm < 5 < 5 < 5 < 5

Na ppm 800 740 600 900

Ni ppm 30 35 40 40

P ppm 300 400 500 400

Pb ppm 10 30 60 10Stotal % 1.06 1.34 2.58 1.48

Ssulfide % 0.88 1.12 2.20 1.24

Sb ppm 0.6 0.7 1.4 0.8SiO2 % 65.8 68.6 63.8 67.0

Sn ppm 50 100 50 50

Sr ppm 6 6 4 6

Te ppm 0.2 0.4 0.6 < 0.2

Th ppm 14 12 14 12

Ti ppm 3800 3800 3600 3600

U ppm 2.8 3.0 3.1 3.0

V ppm 84 88 86 84

Y ppm 22 24 24 26

Zn ppm 42 50 210 24

Zr ppm 165 170 155 175

True SG g/mL 2.7788 2.7512 2.8521 2.7739

COMPOSITE #96

COMPOSITE #97

COMPOSITE #98

COMPOSITE #99


APPENDIX XIV

Variability Composites (99 Samples)

Carbon Leach Testwork

Details and Results

PROJECT A13575CLIENT VISTA GOLD CORPORATIONTEST No WH 4167

MT TODD VARIABILITY COMPOSITE # 1GRIND P80 : 125 µmWATER PERTH TAP WATERDATE OCTOBER 2011

ADDITIONS

TIME Solids Water Carbon NaCN Lime Oxygen pH NaCN Au Cu Wt Au Cu Au Cu

(Hours) (g) (g) Haycarb (g) (g) (ppm) (%) (ppm) (ppm) (g) (g/t) (g/t) Total Total

Yao (g) (%) (%)

3000.0 2000.0 9.1 8.3

0 63.1 1.00 1.20 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.8 0.00 0.00 8.6 9.9 0.033 0.010 3.6 6.31 11 18 63.99 1.98

2 50.1 0.64 0.00 8.2 9.9 0.018 0.003 3.9 6.68 12 24 67.73 2.18

4 42.5 0.00 0.00 7.5 10.1 0.045 0.003 4.6 7.55 12 26 67.73 2.57

6 36.6 0.00 0.00 7.5 10.0 0.030 0.003 5.3 5.96 12 28 67.73 2.91

8 32.2 0.50 0.00 7.4 10.1 0.025 0.003 6.5 4.35 12 32 67.73 3.50

12 27.6 0.00 0.00 8.6 10.3 0.040 0.003 7.6 4.63 12 36 67.73 4.10

24 22.0 0.60 0.00 8.7 10.2 0.020 0.003 11.1 5.64 12 58 67.73 5.90

36 18.5 0.00 0.00 8.6 10.5 0.033 0.003 15.4 3.46 12 62 67.73 7.98

48 18.5 0.00 0.00 8.6 10.2 0.015 0.003 19.6 12 104 67.73 10.18

Product Quantity Assay Total Dist'n Assay Total Dist'n

(ppm) (g) (%) (ppm) (g) (%) 1. NaCN Addition : 0.91 (Kg/t)

2. NaCN Consumption : 0.79 (Kg/t)

3000.0 0.12 360 32.27 125.0 375000 89.82 3. Lime Consumption : 0.40 (Kg/t)

2000.0 0.003 5 0.45 19.600 39200 9.39 4. Perth Tap Water Used : 1.000 (SG)

44.6 529 47.38 1371 0.33 5. Water weight to leach: 2000.0 (g)

18.5 12.0 222 19.90 104.0 1924 0.46 6. Grind Size P 80 : 125 (µm)

7. 0.0 g carbon was added to the slurry at the

67.73 10.18 start of cyanidation.

Total 1116 100.00 417495 100.00 8. Evaporation losses made up prior to sampling at each period.

Calculated Grade 0.37 139 9. 100 g/t Pb(NO3)2 added at start of leach.

Assay Grade 0.42 / 0.43 108

* Carbon samples removed at each sampling interval.

GOLD COPPER COMMENTS :

SAMPLE

CIL CYANIDATION TIME LEACH TESTWORK : AIR SPARGE

SOLUTION DATA PREG. CARBON EXTRACTION

Solids (g)

Solution (mls)

Intermed.Carbon * (g)

Final Carbon (g)

Total Extraction

GOLD & COPPER EXTRACTION CALCULATIONS

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)

RATE OF GOLD & COPPER EXTRACTION

Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.1 8.2

0 63.1 1.00 1.20 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.4 0.50 0.00 8.7 10.0 0.025 0.050 14.9 6.67 9 36 62.29 5.13

2 49.3 0.00 0.00 9.2 10.0 0.035 0.003 17.7 7.13 12 40 69.21 6.02

4 37.7 0.50 0.00 7.5 10.1 0.025 0.003 20.0 11.54 12 40 69.21 6.76

6 32.2 0.00 0.00 7.7 10.1 0.033 0.003 21.4 5.57 12 40 69.21 7.21

8 27.1 0.70 0.00 7.9 10.3 0.015 0.003 22.6 5.04 12 50 69.21 7.64

12 22.5 0.00 0.00 8.7 10.5 0.045 0.003 23.2 4.63 12 96 69.21 8.04

24 17.4 0.80 0.00 8.8 10.1 0.010 0.003 23.5 5.13 12 108 69.21 8.17

36 14.7 0.54 0.00 8.5 10.3 0.023 0.003 26.8 2.65 12 118 69.21 9.26

48 14.7 0.00 0.00 8.7 9.9 0.005 0.003 24.0 12 306 69.21 8.81







14.7 12.0 177 16.48 306.0 4504 0.72 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.43 / 0.42 168



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.3 11.0

0 63.1 1.00 1.21 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.4 0.00 0.00 8.7 10.1 0.030 0.020 6.3 6.71 30 30 60.98 1.22

2 49.3 0.60 0.00 7.7 10.0 0.018 0.015 8.6 7.10 33 58 66.00 1.72

4 41.6 0.00 0.00 7.6 10.1 0.045 0.014 10.9 7.66 36 68 70.60 2.15

6 36.1 0.60 0.00 7.5 10.2 0.023 0.003 13.3 5.47 38 76 72.50 2.58

8 31.2 0.00 0.00 7.6 10.3 0.040 0.003 15.6 4.96 39 82 73.64 2.98

12 27.0 0.00 0.00 8.7 10.3 0.028 0.003 20.9 4.17 40 98 74.63 3.91

24 23.3 0.84 0.00 8.8 9.9 0.008 0.003 28.1 3.69 42 140 76.33 5.22

36 20.7 0.70 0.00 9.1 10.2 0.013 0.003 44.1 2.67 42 200 76.33 8.02

48 20.7 0.00 0.00 8.7 10.3 0.013 0.003 58.6 42 268 76.33 10.58







20.7 42.0 867 27.37 268.0 5534 0.46 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.29 / 1.20 346



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.8 8.0

0 63.1 1.00 1.25 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.4 0.00 0.00 8.7 10.1 0.030 0.065 6.3 6.67 63 28 68.22 1.11

2 50.0 0.64 0.00 7.6 10.0 0.018 0.020 8.4 6.41 72 52 75.16 1.51

4 41.3 0.00 0.00 8.0 10.1 0.045 0.010 10.6 8.72 75 58 77.32 1.87

6 35.2 0.54 0.00 7.5 10.2 0.023 0.005 13.9 6.04 77 58 78.53 2.38

8 30.2 0.00 0.00 7.4 10.3 0.040 0.005 16.5 5.06 78 60 79.11 2.79

12 26.3 0.00 0.00 8.7 10.3 0.028 0.003 22.2 3.89 81 60 80.53 3.66

24 22.6 0.84 0.00 8.9 9.9 0.008 0.003 28.4 3.70 81 144 80.53 4.78

36 18.1 0.74 0.00 9.0 10.2 0.013 0.003 43.7 4.46 84 182 81.68 7.20

48 18.1 0.00 0.00 8.6 10.3 0.013 0.002 55.6 87 212 82.55 9.06







18.1 87.0 1577 26.22 212.0 3844 0.29 6. Grind Size P 80 : 125 (µm)





Assay Grade 2.16 / 2.28 414


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.4 8.1

0 63.1 1.00 1.07 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 55.5 0.00 0.00 8.8 10.1 0.033 0.020 5.9 7.54 42 40 65.64 0.66

2 49.0 0.64 0.00 7.5 10.1 0.018 0.015 8.3 6.54 48 70 73.53 0.94

4 38.5 0.00 0.00 7.7 10.2 0.045 0.003 10.5 10.54 50 70 75.31 1.14

6 32.6 0.54 0.00 7.6 10.3 0.023 0.003 13.5 5.86 51 70 76.25 1.42

8 27.6 0.00 0.00 7.4 10.4 0.045 0.003 16.4 4.98 53 100 77.84 1.73

12 23.4 0.00 0.00 8.7 10.5 0.030 0.003 21.3 4.20 54 108 78.52 2.19

24 18.6 0.90 0.00 8.8 9.9 0.005 0.003 28.1 4.79 57 304 80.23 3.03

36 15.2 0.70 0.00 9.2 10.3 0.015 0.003 46.3 3.40 57 332 80.23 4.73

48 15.2 0.00 0.00 8.7 10.3 0.010 0.003 61.4 57 378 80.23 6.15







15.2 57.0 868 21.19 378.0 5757 0.26 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.53 / 1.47 656


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.5 8.1

0 63.1 1.00 1.12 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 55.0 0.00 0.00 8.8 10.1 0.028 0.030 5.3 8.10 45 38 71.24 0.87

2 46.7 0.70 0.00 7.4 10.0 0.015 0.010 7.1 8.24 48 50 74.31 1.14

4 39.0 0.00 0.00 7.7 10.2 0.048 0.003 8.3 7.79 51 62 77.39 1.34

6 31.5 0.00 0.00 7.6 10.2 0.038 0.003 9.4 7.41 51 64 77.39 1.50

8 25.5 0.00 0.00 7.4 10.3 0.028 0.003 10.8 6.09 51 64 77.42 1.68

12 22.3 0.70 0.00 8.4 10.4 0.015 0.003 12.0 3.20 51 68 77.39 1.85

24 17.1 0.00 0.00 8.7 10.5 0.028 0.003 15.5 5.19 54 86 79.03 2.35

36 14.4 0.70 0.00 9.1 10.3 0.015 0.003 19.7 2.68 54 90 79.03 2.92

48 14.4 0.00 0.00 8.7 10.5 0.030 0.003 27.1 57 118 80.09 3.95







14.4 57.0 820 20.15 118.0 1697 0.11 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.62 / 1.58 454


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.5 8.0

0 63.1 1.00 1.25 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.4 0.00 0.00 8.7 10.1 0.033 0.040 6.5 6.71 45 56 64.12 0.90

2 46.2 0.54 0.00 7.4 10.0 0.023 0.010 10.1 10.21 51 70 70.24 1.31

4 38.9 0.00 0.00 7.7 10.2 0.040 0.005 12.5 7.28 54 90 73.06 1.62

6 34.3 0.00 0.00 7.5 10.1 0.028 0.003 15.6 4.61 57 106 75.51 1.99

8 26.5 0.60 0.00 7.3 10.2 0.020 0.003 18.0 7.78 57 124 75.51 2.28

12 23.2 0.00 0.00 8.6 10.5 0.030 0.003 24.4 3.33 58 126 76.12 2.97

24 19.9 0.80 0.00 8.7 10.4 0.010 0.003 28.7 3.25 60 226 77.11 3.57

36 17.2 0.64 0.00 9.1 10.4 0.018 0.003 43.6 2.68 60 240 77.11 5.19

48 17.2 0.00 0.00 8.6 10.1 0.008 0.003 52.9 63 698 78.25 6.63







17.2 63.0 1085 23.85 698.0 12027 0.65 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.76 / 1.83 570


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 8.9 8.1

0 63.1 1.00 1.27 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 54.1 0.00 0.00 8.7 10.2 0.030 0.025 8.0 8.96 51 58 62.82 0.94

2 44.4 0.60 0.00 7.6 10.1 0.020 0.085 11.2 9.77 57 92 71.37 1.31

4 35.2 0.00 0.00 7.9 10.2 0.040 0.005 12.9 9.15 61 110 71.71 1.51

6 29.5 0.54 0.00 7.7 10.0 0.023 0.005 16.2 5.72 62 134 72.38 1.86

8 24.3 0.00 0.00 7.4 10.2 0.043 0.003 18.3 5.19 63 136 72.85 2.06

12 20.3 0.54 0.00 8.6 10.5 0.023 0.003 23.6 3.98 66 148 74.25 2.58

24 16.0 0.54 0.00 8.8 10.4 0.023 0.003 32.8 4.31 69 194 75.43 3.51

36 13.0 0.54 0.00 9.3 10.6 0.023 0.003 47.2 3.05 72 226 76.35 4.90

48 13.0 0.00 0.00 8.8 10.3 0.015 0.003 61.1 72 346 76.35 6.30







13.0 72.0 932 17.93 346.0 4481 0.21 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.89 / 2.04 698


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.8 8.0

0 63.1 1.00 1.21 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 57.5 0.00 0.00 8.5 10.1 0.028 0.025 5.7 5.59 33 50 67.53 1.01

2 51.1 0.60 0.00 7.5 10.0 0.020 0.005 7.8 6.39 36 56 71.73 1.30

4 42.7 0.00 0.00 7.7 10.2 0.040 0.003 9.2 8.36 39 56 76.42 1.49

6 37.9 0.50 0.00 7.6 10.1 0.025 0.003 10.7 4.80 39 66 76.42 1.73

8 31.7 0.00 0.00 7.5 10.4 0.043 0.003 12.5 6.23 39 84 76.42 2.02

12 27.7 0.64 0.00 9.0 10.4 0.025 0.003 16.1 4.02 39 88 76.42 2.53

24 23.2 0.90 0.00 8.9 10.1 0.013 0.003 21.2 4.48 39 122 76.42 3.30

36 18.1 0.80 0.00 9.5 10.3 0.020 0.003 31.8 5.14 39 206 76.42 4.89

48 18.1 0.00 0.00 8.7 10.4 0.013 0.003 38.1 42 304 78.14 5.88







18.1 42.0 759 24.04 304.0 5493 0.38 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.35 / 1.36 470


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.8 8.1

0 63.1 1.00 1.20 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.3 0.00 0.00 8.6 10.1 0.028 0.010 4.8 6.80 24 20 69.80 0.89

2 49.2 0.60 0.00 7.5 10.0 0.020 0.050 9.6 7.10 24 28 73.44 1.72

4 41.7 0.00 0.00 7.8 10.1 0.040 0.003 8.2 7.49 27 34 75.83 1.50

6 35.7 0.54 0.00 7.7 10.1 0.025 0.003 10.0 6.04 27 46 75.83 1.85

8 30.6 0.00 0.00 7.6 10.3 0.043 0.003 11.6 5.02 27 56 75.83 2.14

12 25.2 0.50 0.00 8.9 10.3 0.025 0.003 15.8 5.43 28 64 77.23 2.86

24 21.2 0.74 0.00 8.9 10.4 0.013 0.003 21.0 4.01 30 100 79.52 3.79

36 16.4 0.60 0.00 9.4 10.4 0.020 0.003 29.1 4.78 30 134 79.52 5.19

48 16.4 0.00 0.00 8.9 10.4 0.013 0.003 39.6 30 234 79.52 7.06







16.4 30.0 492 22.40 234.0 3840 0.32 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.91 / 0.87 384


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.6 8.1

0 63.1 1.00 1.20 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.8 0.00 0.00 8.5 10.2 0.030 0.015 5.2 6.25 21 34 71.20 1.01

2 49.5 0.50 0.00 7.5 10.1 0.025 0.005 7.0 7.35 23 42 76.12 1.33

4 43.7 0.00 0.00 7.7 10.2 0.038 0.003 8.2 5.82 24 50 78.46 1.55

6 37.5 0.00 0.00 7.7 10.1 0.028 0.003 9.4 6.12 24 60 78.46 1.78

8 31.1 0.60 0.00 7.3 10.3 0.020 0.003 10.5 6.42 24 74 78.46 2.00

12 27.0 0.00 0.00 8.5 10.5 0.035 0.005 12.6 4.10 24 78 78.72 2.35

24 21.6 0.74 0.00 8.8 10.5 0.013 0.003 15.2 5.46 24 98 78.46 2.81

36 16.6 0.00 0.00 9.3 10.2 0.035 0.003 20.1 4.96 24 100 78.46 3.60

48 16.6 0.00 0.00 8.7 10.4 0.015 0.003 24.0 27 176 81.08 4.34







16.6 27.0 448 23.56 176.0 2922 0.24 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.70 / 0.70 362


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 10.3 8.2

0 63.1 1.00 1.34 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.5 0.00 0.00 8.8 10.1 0.028 0.015 5.4 4.63 30 42 69.26 1.40

2 50.5 0.74 0.00 7.5 9.9 0.013 0.003 6.9 7.93 32 52 72.57 1.73

4 42.9 0.00 0.00 7.7 10.1 0.043 0.003 9.0 7.67 33 70 74.39 2.27

6 37.3 0.00 0.00 7.5 10.2 0.030 0.003 11.9 5.52 33 76 74.39 2.89

8 30.1 0.64 0.00 7.1 10.2 0.018 0.003 13.5 7.25 33 76 74.39 3.22

12 25.3 0.00 0.00 8.8 10.4 0.048 0.003 18.2 4.74 34 80 75.48 4.20

24 20.6 0.60 0.00 8.8 10.3 0.020 0.003 24.6 4.78 36 168 77.30 5.76

36 17.0 0.00 0.00 9.1 10.5 0.033 0.003 31.9 3.53 36 176 77.30 7.28

48 17.0 0.00 0.00 8.6 10.2 0.013 0.003 37.7 36 272 77.30 8.65







17.0 36.0 613 22.09 272.0 4632 0.48 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.08 / 1.08 330


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.5 8.1

0 63.1 1.00 1.64 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.4 0.00 0.00 8.2 10.2 0.028 0.015 4.8 6.72 12 32 52.08 1.60

2 49.9 0.60 0.00 7.3 10.1 0.020 0.003 6.4 6.49 15 48 61.61 2.16

4 45.3 0.00 0.00 7.6 10.3 0.043 0.003 7.5 4.58 17 52 68.22 2.47

6 41.1 0.00 0.00 7.6 10.2 0.035 0.003 9.0 4.21 18 62 71.21 2.95

8 35.6 0.54 0.00 7.3 10.3 0.023 0.003 9.9 5.50 18 70 71.21 3.25

12 31.9 0.00 0.00 8.6 10.5 0.040 0.003 12.2 3.70 18 74 71.21 3.92

24 27.6 0.80 0.00 8.8 10.2 0.010 0.003 13.2 4.24 18 114 71.21 4.37

36 22.7 0.54 0.00 9.4 10.4 0.023 0.003 17.2 4.99 18 152 71.21 5.63

48 22.7 0.00 0.00 8.2 10.3 0.018 0.003 19.7 18 158 71.21 6.34







22.7 18.0 408 26.98 158.0 3579 0.50 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.01 / 0.98 228


Final Carbon (g)

Total Extraction


Solids (g)

Solution (mls)


SAMPLE




0

10

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30

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50

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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50

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

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50

60

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.6 8.1

0 63.1 1.00 1.38 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 55.1 0.50 0.00 8.0 10.2 0.025 0.015 8.3 7.98 9 68 49.85 0.93

2 48.5 0.00 0.00 7.4 10.2 0.043 0.010 9.2 6.58 12 80 62.81 1.02

4 44.0 0.00 0.00 7.8 10.2 0.038 0.003 10.2 4.54 13 90 65.60 1.12

6 38.4 0.00 0.00 7.6 10.2 0.033 0.003 10.4 5.56 14 158 69.27 1.28

8 32.9 0.50 0.00 7.4 10.2 0.025 0.003 10.9 5.53 15 168 72.48 1.34

12 29.0 0.00 0.00 8.8 10.4 0.040 0.003 12.1 3.90 15 176 72.48 1.46

24 25.3 0.80 0.00 8.8 10.0 0.010 0.003 13.0 3.70 15 222 72.48 1.59

36 20.9 0.60 0.00 9.2 10.3 0.200 0.003 16.4 4.44 15 202 72.48 1.87

48 20.9 0.00 0.00 8.6 10.4 0.023 0.003 17.9 15 162 72.48 1.97







20.9 15.0 313 26.09 162.0 3378 0.15 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.42 / 0.42 732



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

10

20

30

40

50

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70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.6 8.1

0 63.1 1.00 1.04 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 54.1 0.00 0.00 8.3 10.2 0.030 0.010 8.5 8.98 15 124 57.27 0.85

2 45.1 0.50 0.00 7.3 10.1 0.025 0.003 11.7 9.05 18 170 66.00 1.12

4 39.8 0.00 0.00 7.6 10.2 0.038 0.003 13.2 5.30 19 172 68.67 1.22

6 33.4 0.00 0.00 7.6 10.1 0.033 0.003 16.4 6.38 19 188 68.67 1.46

8 27.7 0.60 0.00 7.4 10.3 0.020 0.003 18.3 5.65 20 212 70.65 1.62

12 24.3 0.00 0.00 8.4 10.5 0.040 0.003 22.9 3.46 21 224 72.29 1.94

24 21.5 0.84 0.00 8.9 10.2 0.008 0.003 31.1 2.72 24 314 76.61 2.58

36 17.2 0.64 0.00 9.3 10.4 0.018 0.003 43.9 4.33 27 346 80.44 3.48

48 17.2 0.00 0.00 8.6 10.4 0.013 0.003 59.1 27 410 80.44 4.56




3000.0 0.11 330 19.56 930 2790000 95.44 3. Lime Consumption : 0.35 (Kg/t)

2000.0 0.003 5 0.30 59 118200 4.04 4. Perth Tap Water Used : 1.000 (SG)


17.2 27.0 465 27.54 410 7056 0.24 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.54 / 0.51 886



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

10

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30

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50

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70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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60

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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60

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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60

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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50

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.6 8.0

0 63.1 1.00 1.28 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.2 0.00 0.00 7.9 10.3 0.033 0.020 7.1 6.87 48 76 61.06 1.03

2 50.2 0.00 0.00 7.3 10.3 0.028 0.010 8.8 5.99 51 78 64.02 1.19

4 46.6 0.50 0.00 7.3 10.3 0.025 0.003 10.5 3.60 57 80 69.72 1.39

6 40.3 0.00 0.00 7.4 10.3 0.040 0.003 13.0 6.34 60 82 72.50 1.66

8 34.4 0.00 0.00 7.1 10.4 0.033 0.003 15.0 5.84 63 104 74.91 1.93

12 32.4 0.64 0.00 9.0 10.3 0.018 0.003 18.5 2.07 63 136 74.91 2.37

24 29.1 0.84 0.00 8.8 10.2 0.008 0.003 25.8 3.25 64 208 75.55 3.29

36 23.7 0.70 0.00 9.4 10.4 0.015 0.003 37.7 5.45 66 210 76.71 4.59

48 23.7 0.00 0.00 8.6 10.3 0.010 0.003 50.2 66 312 76.71 6.09







23.7 66.0 1562 31.09 312 7385 0.40 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.79 / 1.93 592



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

10

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


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0

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N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.7 8.0

0 63.1 1.00 1.25 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 57.1 0.00 0.00 8.5 10.2 0.030 0.015 7.1 6.03 36 32 62.89 0.95

2 50.1 0.60 0.00 7.4 10.2 0.020 0.005 9.8 6.93 39 58 67.02 1.35

4 45.0 0.00 0.00 7.7 10.1 0.040 0.003 12.0 5.13 42 58 71.00 1.61

6 37.7 0.50 0.00 7.6 10.1 0.025 0.003 15.2 7.29 45 66 74.69 2.00

8 31.9 0.00 0.00 7.3 10.4 0.043 0.003 18.2 5.80 48 92 77.78 2.41

12 29.1 0.00 0.00 8.8 10.3 0.030 0.003 24.7 2.82 51 122 80.39 3.24

24 22.7 0.90 0.00 8.8 10.1 0.005 0.003 33.3 6.42 54 252 82.78 4.47

36 17.0 0.64 0.00 9.2 10.5 0.018 0.003 55.6 5.69 54 326 82.78 7.19

48 17.0 0.00 0.00 8.2 10.5 0.015 0.003 79.2 54 360 82.78 10.00







17.0 54.0 916 25.05 360 6109 0.36 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.20 / 1.22 540



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


Au-Total

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.8 8.2

0 63.1 1.00 1.30 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 54.9 0.00 0.00 8.8 10.3 0.028 0.010 10.3 8.21 30 52 73.68 0.67

2 48.2 0.64 0.00 7.4 9.8 0.018 0.003 13.8 6.68 32 104 77.33 0.93

4 42.1 0.00 0.00 7.7 10.0 0.038 0.003 16.4 6.05 33 128 79.18 1.11

6 36.5 0.54 0.00 7.5 9.9 0.025 0.003 21.2 5.69 35 136 82.43 1.39

8 30.7 0.00 0.00 7.3 10.2 0.040 0.003 23.4 5.80 36 150 83.84 1.52

12 28.1 0.00 0.00 8.4 10.2 0.030 0.003 28.5 2.51 36 158 83.84 1.82

24 23.9 0.84 0.00 9.0 9.9 0.008 0.003 36.2 4.26 36 238 83.84 2.31

36 19.7 0.50 0.00 9.0 10.2 0.025 0.003 51.1 4.16 36 242 83.84 3.15

48 19.7 0.00 0.00 8.4 10.2 0.025 0.003 65.9 38 246 84.97 3.97







19.7 37.5 740 28.49 246 4851 0.14 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.93 / 1.16 1014


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

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TIME (Hours)


Au-Total

Cu-Total

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(%)

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Au-Total

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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Au-Total

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0

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TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.6 8.1

0 63.1 1.00 1.05 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.9 0.00 0.00 8.7 10.2 0.028 0.010 10.5 4.20 15 64 57.53 0.46

2 50.2 0.50 0.00 7.6 10.2 0.025 0.003 11.7 8.68 18 112 67.16 0.56

4 45.5 0.00 0.00 7.8 10.3 0.038 0.003 12.9 4.69 20 136 73.14 0.62

6 40.1 0.00 0.00 7.6 10.2 0.028 0.003 15.0 5.37 21 154 75.85 0.72

8 35.4 0.64 0.00 7.6 10.3 0.018 0.003 15.6 4.75 21 154 75.85 0.74

12 31.9 0.00 0.00 9.1 10.4 0.033 0.005 20.1 3.48 21 182 76.14 0.92

24 25.6 0.94 0.00 9.1 10.1 0.003 0.003 22.1 6.33 21 222 75.85 1.02

36 20.2 0.50 0.00 9.2 10.4 0.025 0.003 32.3 5.37 21 270 75.85 1.42

48 20.2 0.00 0.00 8.8 9.8 0.003 0.003 50.0 24 534 79.46 2.18







20.2 24.0 485 28.88 534 10792 0.20 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.54 / 0.53 1546


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

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0

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0

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(%)

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Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

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Au-Total

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

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Au-Total

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(%)

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Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

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Au-Total

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0

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Au-Total

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EX

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(%)

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Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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(%)

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Au-Total

Cu-Total

PROJECT A13575CLIENT VISTA GOLD CORPORATIONTEST No WH 4WH 4186


ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.7 8.1

0 63.1 1.00 1.38 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 60.2 0.00 0.00 8.5 10.3 0.025 0.030 13.2 2.92 36 98 56.49 0.88

2 53.3 0.74 0.00 7.6 10.3 0.013 0.010 16.1 6.85 40 116 61.36 1.06

4 48.1 0.00 0.00 7.8 10.3 0.050 0.010 19.7 5.21 44 120 66.52 1.26

6 43.0 0.00 0.00 7.7 10.4 0.045 0.003 23.3 5.07 48 162 70.82 1.51

8 36.6 0.00 0.00 7.2 10.5 0.035 0.005 26.9 6.44 51 166 74.07 1.71

12 32.9 0.00 0.00 8.9 10.6 0.028 0.003 32.0 3.70 53 194 75.73 2.01

24 27.3 0.84 0.00 8.9 10.1 0.008 0.003 36.9 5.59 57 236 78.91 2.31

36 22.4 0.00 0.00 9.2 10.1 0.033 0.003 58.3 4.93 57 328 78.91 3.53

48 22.4 0.00 0.00 8.6 10.5 0.015 0.003 66.3 57 442 78.91 4.03







22.4 57.0 1275 30.90 442 9888 0.27 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.32 / 1.32 1118


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



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ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 9.4 8.0

0 63.1 1.00 1.57 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.2 0.00 0.00 8.7 10.2 0.025 0.025 13.5 3.93 42 106 74.16 0.92

2 51.7 0.60 0.00 7.6 10.1 0.020 0.005 19.7 7.43 47 164 81.18 1.34

4 47.7 0.00 0.00 7.7 10.2 0.035 0.003 26.1 4.04 48 172 82.46 1.71

6 41.6 0.64 0.00 7.6 10.0 0.018 0.003 32.8 6.06 49 222 83.77 2.14

8 36.7 0.00 0.00 7.4 10.2 0.040 0.003 39.9 4.92 50 272 84.92 2.58

12 33.7 0.00 0.00 8.8 10.4 0.028 0.003 51.5 3.01 51 320 85.93 3.27

24 27.4 0.90 0.00 8.6 10.1 0.005 0.003 60.5 6.34 51 488 85.93 3.91

36 20.8 0.64 0.00 9.3 10.5 0.018 0.003 97.7 6.58 51 548 85.93 5.99

48 20.8 0.00 0.00 8.2 10.6 0.023 0.003 126.0 54 702 87.64 7.63







20.8 54.0 1122 30.81 702 14581 0.40 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.22 / 1.14 1100


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



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PROJECT A13575CLIENT VISTA GOLD CORPORATIONTEST No WH WH 4188


ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 3.9 8.1

0 63.1 1.00 1.51 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.4 0.00 0.00 6.9 10.4 0.025 0.020 6.5 4.66 18 80 46.78 1.09

2 50.8 0.60 0.00 7.2 10.3 0.020 0.010 11.3 7.59 24 138 59.93 1.86

4 45.3 0.00 0.00 7.3 10.4 0.048 0.005 14.9 5.52 29 164 69.65 2.38

6 40.4 0.00 0.00 7.5 10.3 0.040 0.003 19.8 4.92 30 180 71.25 3.02

8 35.7 0.00 0.00 7.1 10.3 0.038 0.003 23.8 4.66 31 182 72.86 3.51

12 32.5 0.54 0.00 9.0 10.2 0.023 0.003 30.6 3.19 33 230 75.70 4.44

24 27.5 0.84 0.00 9.0 10.1 0.016 0.003 43.3 5.01 36 314 79.59 6.14

36 21.0 0.54 0.00 9.2 10.4 0.023 0.003 60.2 6.53 36 348 79.59 8.25

48 21.0 0.00 0.00 8.5 10.3 0.018 0.003 73.7 39 364 82.09 9.91







21.0 39.0 819 32.59 364 7644 0.46 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.86 / 0.74 510


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



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ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.8 8.1

0 63.1 1.00 1.64 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.1 0.00 0.00 7.9 10.4 0.030 0.015 8.2 3.97 12 108 37.29 1.29

2 52.4 0.60 0.00 7.5 10.4 0.020 0.005 13.9 6.67 15 124 44.74 1.95

4 48.8 0.00 0.00 7.7 10.4 0.043 0.003 17.9 3.65 18 140 51.96 2.44

6 43.0 0.00 0.00 7.6 10.3 0.030 0.003 24.0 5.75 21 160 58.90 3.17

8 34.0 0.70 0.00 7.2 10.4 0.015 0.003 29.0 9.04 23 218 62.98 3.87

12 31.3 0.00 0.00 9.2 10.2 0.045 0.003 39.8 2.68 24 224 64.59 5.08

24 27.2 0.74 0.00 8.7 10.4 0.013 0.003 55.4 4.12 25 350 66.07 7.03

36 20.3 0.54 0.00 9.4 10.7 0.023 0.003 75.4 6.93 27 358 68.65 9.26

48 20.3 0.00 0.00 8.7 10.6 0.025 0.003 105.0 33 384 74.41 12.57







20.3 33.0 669 31.70 384 7784 0.43 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.90 / 0.72 522


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



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(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 4.7 8.6

0 63.1 1.00 1.28 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 57.4 0.00 0.00 7.4 10.3 0.033 0.020 6.9 5.69 30 76 51.67 1.18

2 50.1 0.50 0.00 7.5 10.3 0.025 0.020 10.0 7.33 36 98 60.88 1.63

4 41.0 0.00 0.00 7.7 10.4 0.040 0.010 12.6 9.11 42 112 68.37 2.01

6 34.3 0.00 0.00 7.7 10.4 0.033 0.003 16.3 6.70 45 154 71.26 2.59

8 28.2 0.54 0.00 7.8 10.4 0.023 0.003 18.3 6.10 46 168 72.17 2.88

12 23.6 0.00 0.00 9.3 10.4 0.030 0.003 24.5 4.53 48 186 73.68 3.70

24 18.6 0.90 1.67 8.7 9.2 0.005 0.003 51.6 5.07 51 251 75.57 7.25

36 15.2 0.70 0.00 9.1 10.7 0.015 0.003 60.0 3.40 59 350 79.54 8.44

48 15.2 0.00 0.00 8.7 10.3 0.030 0.003 62.8 60 730 79.95 9.16







15.2 60.0 909 24.31 730 11060 0.70 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.46 / 1.43 464


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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40

50

60

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total



ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 3.4 8.5

0 63.1 1.00 1.20 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 57.9 0.00 0.00 5.3 10.3 0.030 0.045 9.8 5.20 39 86 48.78 1.00

2 48.9 0.60 0.00 7.3 10.3 0.020 0.025 13.7 8.94 51 122 61.30 1.39

4 39.5 0.00 0.00 7.3 10.4 0.045 0.010 17.5 9.47 63 146 71.96 1.74

6 34.0 0.00 0.00 7.6 10.4 0.033 0.003 22.7 5.43 65 166 73.19 2.19

8 28.9 0.50 0.00 7.6 10.4 0.025 0.003 25.9 5.10 66 200 73.84 2.49

12 24.5 0.00 0.00 9.4 10.4 0.040 0.003 34.0 4.47 69 208 75.50 3.15

24 20.1 0.90 0.00 8.7 9.8 0.005 0.015 44.3 4.35 76 386 79.25 4.16

36 16.3 0.90 2.96 9.4 9.4 0.005 0.003 61.1 3.78 81 640 80.70 5.71

48 16.3 0.00 0.00 8.8 10.7 0.028 0.003 120.0 84 1046 81.64 10.72







16.3 84.0 1373 26.26 1046 17092 0.69 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.93 / 2.14 742


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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40

50

60

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4192

MT TODD VARIABILITY COMPOSITE # 26GRIND P80 : 125 µm

WATER PERTH TAP WATER

DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 0.7 8.3

0 63.1 1.00 1.99 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.3 0.00 0.00 4.5 10.4 0.030 0.040 11.3 3.83 21 66 47.99 1.21

2 55.4 0.60 0.00 5.8 10.3 0.020 0.025 18.4 3.87 27 82 59.12 1.89

4 51.7 0.00 0.00 7.0 10.4 0.038 0.020 30.7 3.73 30 148 64.45 3.16

6 48.2 0.00 0.00 7.6 10.3 0.028 0.010 40.5 3.50 33 202 69.06 4.17

8 44.2 0.64 0.00 7.6 10.3 0.018 0.005 48.0 3.99 35 256 72.01 4.96

12 39.4 0.00 0.00 7.8 10.4 0.033 0.005 66.7 4.72 36 264 73.52 6.66

24 35.5 0.84 0.00 8.7 10.1 0.008 0.003 80.3 3.91 36 542 73.35 8.38

36 29.4 0.74 0.00 8.1 10.2 0.013 0.003 122.0 6.18 36 618 73.35 12.26

48 29.4 0.00 0.00 9.6 10.4 0.023 0.003 143.0 36 664 73.35 14.21


(ppm) (mg) (%) (ppm) (mg) (%) 1. NaCN Addition : 1.27 (Kg/t)





29.4 36.0 1057 36.10 664 19488 0.88 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.01 / 1.04 662


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4193



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 4.7 8.3

0 63.1 1.00 1.25 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.7 0.00 0.00 6.6 11.3 0.033 0.015 7.8 3.38 21 34 65.19 1.06

2 57.5 0.50 0.00 7.5 10.2 0.025 0.005 10.5 2.25 24 64 72.85 1.49

4 53.0 0.00 0.00 7.6 10.3 0.033 0.003 16.6 4.49 25 122 75.37 2.41

6 48.4 0.50 0.00 9.1 10.4 0.025 0.003 21.7 4.52 26 174 77.92 3.18

8 42.9 0.00 0.00 8.5 10.6 0.040 0.003 27.1 5.55 26 176 77.92 3.83

12 38.8 0.60 0.00 8.4 10.5 0.020 0.003 38.1 4.05 26 192 77.92 5.19

24 34.6 0.80 0.00 9.0 10.4 0.010 0.005 56.8 4.23 27 338 80.03 7.75

36 29.4 0.60 0.00 8.4 10.5 0.020 0.003 81.4 5.19 27 418 79.79 10.85

48 29.4 0.00 0.00 9.8 10.5 0.018 0.003 107.0 27 558 79.79 14.15







29.4 27.0 794 38.23 558 16416 0.98 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.71 / 0.70 474


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4194



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 2.5 8.3

0 63.1 1.00 1.00 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 60.3 0.00 0.00 7.1 10.2 0.030 0.010 6.3 2.74 9 32 44.46 0.83

2 58.4 0.50 0.00 7.1 10.2 0.025 0.003 9.0 1.95 11 72 52.45 1.27

4 55.2 0.00 0.00 7.4 10.4 0.033 0.003 14.0 3.18 12 94 56.87 1.91

6 49.7 0.50 0.00 8.6 10.4 0.025 0.003 18.2 5.56 13 138 61.04 2.53

8 46.5 0.00 0.00 8.2 10.6 0.040 0.003 22.5 3.19 14 148 64.80 3.05

12 41.3 0.00 0.00 8.2 10.6 0.028 0.003 31.1 5.21 15 192 68.31 4.14

24 36.4 0.90 0.00 8.9 10.2 0.005 0.003 43.7 4.82 17 354 74.55 5.95

36 30.0 0.74 0.00 8.3 10.6 0.013 0.003 66.3 6.40 18 384 77.31 8.58

48 30.0 0.00 0.00 9.6 10.7 0.020 0.003 90.0 18 460 77.31 11.40







30.0 18.0 541 40.89 460 13814 0.78 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.51 / 0.54 522


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4195



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 3.9 8.2

0 63.1 1.00 1.14 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.3 0.00 0.00 7.6 10.4 0.030 0.040 10.2 3.80 51 64 53.58 1.30

2 55.4 0.54 0.00 7.0 10.3 0.023 0.015 13.9 3.84 57 88 58.55 1.77

4 51.5 0.00 0.00 7.4 10.2 0.043 0.005 18.7 3.96 60 118 60.93 2.37

6 47.5 0.00 0.00 7.7 10.5 0.035 0.003 21.8 4.02 63 164 63.35 2.83

8 41.1 0.60 0.00 8.3 10.7 0.020 0.003 24.8 6.37 64 168 64.13 3.16

12 35.9 0.00 0.00 8.3 10.8 0.043 0.003 29.6 5.21 65 194 64.79 3.72

24 31.0 0.80 0.00 8.9 10.5 0.010 0.003 37.7 4.87 66 202 65.38 4.60

36 24.6 0.00 0.00 8.3 10.6 0.033 0.003 48.2 6.42 69 254 66.89 5.80

48 24.6 0.00 0.00 9.8 10.5 0.015 0.003 53.6 75 416 69.29 6.59







24.6 75.0 1844 29.97 416 10229 0.54 6. Grind Size P 80 : 125 (µm)





Assay Grade 2.31 / 2.35 528


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4196



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 3.8 8.1

0 63.1 1.00 0.98 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.5 0.00 0.00 6.6 10.3 0.033 0.035 7.6 3.61 66 56 43.91 0.79

2 55.7 0.00 0.00 6.9 10.3 0.028 0.015 8.7 3.76 75 78 49.05 0.94

4 50.9 0.54 0.00 7.5 10.4 0.023 0.010 10.7 4.80 81 116 52.41 1.19

6 45.2 0.00 0.00 8.7 10.5 0.043 0.005 12.7 5.71 89 138 56.53 1.41

8 40.3 0.00 0.00 8.1 10.6 0.038 0.005 14.6 4.90 93 172 58.41 1.63

12 33.2 0.00 0.00 8.2 10.4 0.028 0.005 17.7 7.10 96 204 59.66 1.94

24 28.3 0.90 0.00 8.9 10.1 0.005 0.003 19.1 4.95 105 290 62.71 2.18

36 23.4 0.00 0.00 8.3 10.3 0.033 0.003 24.9 4.82 111 294 64.47 2.67

48 23.4 0.00 0.00 9.7 10.2 0.015 0.003 27.7 113 396 64.83 3.01







23.4 112.5 2636 27.34 396 9278 0.39 6. Grind Size P 80 : 125 (µm)





Assay Grade 3.83 / 3.76 680


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4197



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 6.4 8.3

0 63.1 1.00 1.12 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.2 0.00 0.00 6.7 10.3 0.030 0.015 3.8 3.85 15 46 66.19 1.25

2 54.3 0.54 0.00 6.9 10.4 0.023 0.003 4.1 4.89 16 52 68.51 1.38

4 50.1 0.00 0.00 7.5 10.6 0.040 0.015 5.0 4.23 17 54 73.89 1.59

6 45.8 0.00 0.00 8.8 10.5 0.038 0.003 5.8 4.32 18 58 75.59 1.80

8 41.7 0.00 0.00 8.2 10.2 0.030 0.003 5.8 4.11 18 70 75.59 1.89

12 37.8 0.00 0.00 8.5 10.2 0.028 0.003 6.3 3.91 18 80 75.59 2.05

24 33.3 0.84 0.00 9.1 10.2 0.008 0.003 6.6 4.44 18 84 75.59 2.13

36 27.6 0.50 0.00 8.3 10.5 0.025 0.003 8.9 5.71 18 106 75.59 2.77

48 27.6 0.00 0.00 9.8 10.7 0.030 0.003 10.8 18 122 75.59 3.28







27.6 18.0 497 33.71 122 3370 0.40 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.57 / 0.52 250


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4198



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 6.6 8.3

0 63.1 1.00 1.01 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.4 0.00 0.00 7.1 10.3 0.038 0.005 2.1 3.64 12 20 60.64 1.07

2 54.7 0.00 0.00 7.0 10.4 0.033 0.010 2.8 4.71 12 24 61.43 1.38

4 51.1 0.00 0.00 7.6 10.5 0.028 0.003 3.4 3.60 13 28 64.57 1.65

6 47.9 0.54 0.00 8.8 10.6 0.023 0.003 3.7 3.25 14 32 68.61 1.81

8 44.1 0.00 0.00 8.3 10.6 0.035 0.010 4.2 3.78 14 36 69.80 2.06

12 37.9 0.00 0.00 8.5 10.7 0.030 0.005 4.4 6.25 15 38 72.49 2.14

24 34.5 0.80 0.00 9.2 10.3 0.010 0.003 4.4 3.39 16 40 75.09 2.17

36 30.2 0.50 0.00 8.4 10.5 0.025 0.003 6.0 4.28 16 42 75.09 2.80

48 30.2 0.00 0.00 9.9 10.5 0.030 0.003 7.0 17 50 76.28 3.23







30.2 16.5 498 39.37 50 1509 0.29 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.33 / 0.36 156


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4199



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.5 8.4

0 63.1 1.00 1.31 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 60.0 0.00 0.00 6.7 10.4 0.033 0.005 4.8 3.08 3 22 38.43 2.75

2 54.2 0.00 0.00 7.0 10.4 0.030 0.003 6.5 5.82 5 28 60.61 3.66

4 49.9 0.54 0.00 7.7 10.5 0.023 0.003 8.1 4.24 6 40 71.07 4.61

6 46.1 0.00 0.00 8.8 10.6 0.043 0.003 9.3 3.84 6 50 71.07 5.35

8 42.3 0.00 0.00 8.3 10.7 0.033 0.003 10.7 3.77 6 66 71.07 6.23

12 37.1 0.00 0.00 8.4 10.6 0.028 0.003 13.3 5.20 6 88 71.07 7.76

24 32.7 0.90 0.00 9.2 10.1 0.005 0.003 14.6 4.40 6 126 71.07 8.75

36 28.3 0.50 0.00 8.5 10.4 0.025 0.003 18.2 4.42 6 160 71.07 10.82

48 28.3 0.00 0.00 9.8 10.4 0.018 0.003 24.8 6 164 71.07 14.14







28.3 6.0 170 32.76 164 4643 1.16 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.23 / 0.22 122


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4200



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.0 8.3

0 63.1 1.00 1.12 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.8 0.00 0.00 7.4 1.3 0.030 0.001 6.7 4.25 11 64 64.36 0.69

2 55.7 0.60 0.00 7.6 10.4 0.020 0.003 8.8 3.12 12 66 70.17 0.86

4 51.9 0.00 0.00 7.7 10.6 0.043 0.003 10.6 3.81 12 72 70.17 1.02

6 46.7 0.00 0.00 9.1 10.7 0.038 0.003 11.4 5.25 12 76 70.17 1.10

8 42.0 0.54 0.00 8.4 10.6 0.023 0.003 12.9 4.61 12 84 70.17 1.23

12 37.9 0.00 0.00 8.4 10.7 0.040 0.003 15.1 4.15 12 92 70.17 1.42

24 32.4 0.70 0.00 9.1 10.2 0.015 0.003 16.5 5.49 13 130 73.68 1.59

36 28.3 0.54 0.00 8.4 10.2 0.023 0.003 22.1 4.08 13 134 73.68 2.04

48 28.3 0.00 0.00 9.9 10.2 0.025 0.003 26.4 14 196 74.99 2.45







28.3 13.5 382 35.41 196 5551 0.22 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.39 / 0.37 762


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4201



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 6.1 8.3

0 63.1 1.00 1.00 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.8 0.00 0.00 8.3 10.3 0.030 0.005 4.3 3.33 11 30 68.43 1.09

2 55.3 0.00 0.00 7.3 10.4 0.028 0.003 5.4 4.45 12 44 73.75 1.40

4 50.9 0.60 0.00 7.9 10.4 0.020 0.003 6.4 4.37 12 52 73.75 1.67

6 46.5 0.00 0.00 8.6 10.6 0.040 0.003 7.4 4.42 12 56 73.75 1.88

8 42.4 0.00 0.00 8.5 10.6 0.035 0.003 8.5 4.07 12 58 73.75 2.14

12 38.7 0.00 0.00 8.4 10.7 0.028 0.003 10.1 3.79 12 78 73.75 2.55

24 33.2 0.84 0.00 9.1 10.0 0.008 0.003 9.9 5.43 12 90 73.75 2.55

36 29.1 0.70 0.00 8.4 10.4 0.015 0.003 16.9 4.12 12 90 73.75 4.01

48 29.1 0.00 0.00 9.8 10.6 0.025 0.003 20.0 12 150 73.75 4.84







29.1 12.0 349 33.95 150 4365 0.45 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.36 / 0.39 312


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4202



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.8 8.3

0 63.1 1.00 0.86 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.4 0.00 0.00 7.3 10.3 0.030 0.010 4.3 3.68 24 36 68.35 0.67

2 54.8 0.54 0.00 7.6 10.4 0.023 0.005 5.0 4.63 25 52 70.55 0.81

4 50.2 0.00 0.00 7.9 10.6 0.040 0.003 5.6 4.59 27 66 75.21 0.94

6 45.6 0.00 0.00 9.0 10.7 0.033 0.003 6.3 4.55 28 72 77.44 1.05

8 40.6 0.54 0.00 8.7 10.7 0.023 0.003 7.3 5.00 29 74 79.48 1.17

12 36.9 0.00 0.00 8.6 10.8 0.043 0.003 8.1 3.74 30 88 81.29 1.31

24 32.3 0.64 0.00 9.1 10.3 0.018 0.003 8.7 4.55 30 106 81.29 1.42

36 27.8 0.54 0.00 8.6 10.3 0.023 0.003 11.8 4.53 30 116 81.29 1.83

48 27.8 0.00 0.00 9.9 10.4 0.020 0.003 16.9 30 166 81.29 2.54







27.8 30.0 834 37.17 166 4616 0.29 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.86 / 0.91 486


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4203



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.5 8.3

0 63.1 1.00 1.01 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.7 0.00 0.00 9.1 10.3 0.030 0.015 6.1 3.37 25 66 55.76 0.76

2 55.2 0.50 0.00 8.2 10.3 0.025 0.003 7.0 4.49 26 92 56.96 0.92

4 51.5 0.00 0.00 9.3 10.5 0.038 0.003 8.5 3.76 27 116 58.88 1.12

6 45.9 0.00 0.00 9.4 10.6 0.028 0.003 9.2 5.61 28 134 60.67 1.23

8 41.6 0.54 0.00 8.9 10.6 0.023 0.003 10.1 4.28 30 138 63.85 1.32

12 37.0 0.00 0.00 8.6 10.7 0.038 0.003 11.8 4.57 32 144 66.73 1.49

24 31.8 0.84 0.00 9.1 10.0 0.008 0.003 12.9 5.19 36 178 71.87 1.65

36 26.8 0.74 0.00 8.6 10.1 0.013 0.003 24.4 5.05 40 198 76.28 2.75

48 26.8 0.00 0.00 9.9 10.2 0.023 0.003 32.6 42 304 78.14 3.65







26.8 42.0 1124 39.00 304 8135 0.38 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.25 / 1.18 642


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4204



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 7.8 8.3

0 63.1 1.00 1.08 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.4 0.00 0.00 8.0 10.3 0.030 0.005 9.8 4.65 18 96 57.64 1.08

2 54.7 0.54 0.00 7.5 10.3 0.023 0.003 12.2 3.73 19 146 60.33 1.40

4 51.0 0.00 0.00 8.7 10.5 0.035 0.003 16.1 3.71 21 168 65.83 1.77

6 46.4 0.00 0.00 8.9 10.6 0.030 0.003 18.8 4.57 22 182 68.40 2.03

8 41.7 0.54 0.00 8.7 10.6 0.023 0.003 20.3 4.76 23 192 70.73 2.18

12 37.7 0.00 0.00 8.5 10.7 0.030 0.003 26.9 4.01 24 204 72.83 2.75

24 32.1 0.84 0.00 9.1 10.2 0.008 0.003 30.0 5.57 24 296 72.83 3.15

36 26.8 0.70 0.00 8.5 10.3 0.015 0.003 42.4 5.26 24 304 72.83 4.20

48 26.8 0.00 0.00 9.8 10.3 0.018 0.003 52.1 24 444 72.83 5.17







26.8 24.0 644 32.39 444 11908 0.50 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.75 / 0.68 680


Solids (g)

Solution (mls)


SAMPLE




Final Carbon (g)

Total Extraction


0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

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Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIME (Hours)


Au-Total

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0

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EX

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TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4205



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 4.5 8.1

0 63.1 1.00 1.04 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 58.6 0.00 0.00 7.5 10.2 0.030 0.040 10.6 4.52 45 118 41.97 0.98

2 54.4 0.54 0.00 7.1 10.2 0.023 0.025 14.3 4.14 60 156 54.17 1.31

4 50.5 0.00 0.00 8.4 10.4 0.035 0.015 21.6 3.93 75 170 65.62 1.84

6 46.5 0.00 0.00 8.9 10.5 0.028 0.010 25.7 4.04 84 174 72.01 2.13

8 41.7 0.60 0.00 8.8 10.5 0.020 0.010 28.6 4.72 90 178 76.02 2.33

12 36.6 0.00 0.00 8.3 10.5 0.033 0.005 39.2 5.15 93 270 77.68 3.19

24 32.6 0.84 0.00 8.9 9.9 0.008 0.003 52.6 3.95 98 346 80.24 4.20

36 26.4 0.74 0.00 8.6 10.1 0.013 0.003 77.8 6.23 102 412 82.11 6.01

48 26.4 0.00 0.00 9.9 10.3 0.018 0.003 105.0 107 484 83.82 7.94







26.4 106.5 2812 40.43 484 12778 0.44 6. Grind Size P 80 : 125 (µm)





Assay Grade 3.04 / 3.79 820


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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N

(%)

TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

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TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIME (Hours)


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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

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40

50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4206



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 2.6 8.1

0 63.1 1.00 0.99 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 57.3 0.00 0.00 6.1 10.3 0.030 0.025 10.1 5.79 21 60 45.57 0.81

2 53.6 0.50 0.00 6.7 10.3 0.025 0.015 14.1 3.67 27 88 56.30 1.13

4 49.1 0.00 0.00 7.7 10.5 0.033 0.005 21.1 4.54 33 140 66.31 1.69

6 45.0 0.00 0.00 8.6 10.6 0.028 0.003 26.5 4.07 36 172 71.02 2.11

8 41.3 0.60 0.00 8.4 10.6 0.020 0.010 30.7 3.76 38 188 74.50 2.41

12 37.7 0.00 0.00 8.1 10.7 0.000 0.003 45.2 3.52 40 200 76.74 3.41

24 33.0 0.80 0.00 8.9 10.2 0.800 0.003 59.8 4.71 42 312 79.24 4.53

36 26.6 0.00 0.00 8.3 10.4 0.000 0.003 84.1 6.46 43 358 80.34 6.21

48 26.6 0.00 0.00 10.0 10.2 0.000 0.003 94.6 45 746 82.10 7.26







26.6 45.0 1195 39.62 746 19814 0.67 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.04 / 1.10 842


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

20

30

40

50

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4207



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 2.5 8.1

0 63.1 1.00 1.09 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.0 0.00 0.00 7.5 10.2 0.030 0.045 8.2 4.07 45 50 62.09 1.15

2 55.5 0.54 0.00 7.4 10.3 0.023 0.015 10.9 3.48 52 54 69.57 1.48

4 51.6 0.00 0.00 8.4 10.5 0.038 0.010 16.5 3.91 57 104 75.24 2.30

6 46.0 0.50 0.00 8.8 10.5 0.025 0.003 20.6 5.67 59 156 77.11 2.93

8 40.7 0.00 0.00 8.6 10.7 0.045 0.003 25.1 5.27 60 168 78.09 3.49

12 36.7 0.00 0.00 8.3 10.7 0.028 0.003 35.5 3.99 62 192 79.81 4.77

24 31.8 0.90 0.00 9.1 10.0 0.005 0.003 39.3 4.94 63 366 80.59 5.59

36 21.9 0.74 0.00 8.5 10.3 0.013 0.003 63.6 9.87 64 412 81.26 8.52

48 21.9 0.00 0.00 9.9 10.4 0.015 0.003 84.9 66 546 82.19 11.19







21.9 66.0 1444 30.61 546 11946 0.70 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.90 / 1.97 492


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



0

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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(%)

TIME (Hours)


Au-Total

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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50

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70

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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40

50

60

70

80

90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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30

40

50

60

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90

100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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100

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4208



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 4.1 8.1

0 63.1 1.00 1.23 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 59.6 0.00 0.00 7.8 10.3 0.033 0.025 6.9 3.49 33 58 55.60 1.05

2 55.3 0.00 0.00 7.4 10.4 0.028 0.010 9.6 4.34 42 76 68.80 1.45

4 51.9 0.64 0.00 8.8 10.4 0.018 0.003 13.6 3.36 48 138 77.06 2.13

6 48.3 0.00 0.00 8.9 10.6 0.040 0.003 17.8 3.56 50 170 79.76 2.74

8 46.6 0.50 0.00 8.2 10.6 0.025 0.003 22.6 1.75 51 198 81.03 3.40

12 43.2 0.00 0.00 8.4 10.7 0.040 0.003 31.4 3.38 52 206 82.24 4.48

24 37.7 0.80 0.00 9.1 10.3 0.010 0.003 41.3 5.47 53 348 83.37 6.05

36 32.3 0.54 0.00 8.4 10.3 0.023 0.003 62.2 5.48 54 352 84.35 8.58

48 32.3 0.00 0.00 9.9 10.4 0.020 0.003 82.9 54 476 84.35 11.32







32.3 54.0 1742 45.42 476 15351 0.93 6. Grind Size P 80 : 125 (µm)





Assay Grade 1.18 / 1.27 498


Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction



SAMPLE



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PROJECT A13575


TEST No WH 4209



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 5.4 8.2

0 63.1 1.00 1.08 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 61.9 0.00 0.00 8.3 10.2 0.030 0.015 5.9 1.21 15 84 57.07 1.38

2 59.0 0.54 0.00 7.5 10.2 0.023 0.005 7.5 2.92 18 112 66.75 1.78

4 53.1 0.00 0.00 8.6 10.4 0.043 0.005 11.5 5.87 20 130 73.65 2.52

6 48.6 0.00 0.00 8.9 10.3 0.030 0.003 15.3 4.51 21 146 76.46 3.21

8 44.0 0.64 0.00 7.9 10.4 0.018 0.003 17.6 4.57 22 152 79.30 3.60

12 40.2 0.00 0.00 8.1 10.5 0.043 0.003 23.9 3.85 23 168 81.87 4.68

24 34.4 0.74 0.00 8.2 10.2 0.013 0.003 35.2 5.72 24 278 84.22 6.88

36 29.9 0.00 0.00 8.0 10.2 0.035 0.003 46.3 4.58 24 292 84.22 8.72

48 29.9 0.00 0.00 9.8 10.2 0.018 0.003 52.6 24 380 84.22 9.95







29.9 24.0 716 41.88 380 11343 0.92 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.64 / 0.64 370



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


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0

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Au-Total

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

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0

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(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4210



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 2.8 8.1

0 63.1 1.00 0.94 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 61.0 0.00 0.00 7.6 10.3 0.030 0.050 6.8 2.04 51 88 54.51 0.93

2 56.3 0.54 0.00 7.3 10.3 0.023 0.015 8.7 4.78 63 124 65.39 1.22

4 50.6 0.00 0.00 8.5 10.5 0.038 0.005 12.7 5.70 69 152 70.61 1.68

6 45.0 0.50 0.00 8.4 10.6 0.025 0.003 16.0 5.57 72 184 73.02 2.08

8 39.6 0.00 0.00 7.8 10.6 0.043 0.003 18.9 5.41 73 200 73.76 2.39

12 36.4 0.00 0.00 8.4 10.7 0.033 0.003 24.0 3.20 75 202 75.06 2.89

24 30.6 0.84 0.00 9.1 10.0 0.008 0.003 26.3 5.78 76 294 75.66 3.27

36 23.4 0.64 0.00 8.8 10.2 0.018 0.003 34.7 7.23 78 298 76.66 4.09

48 23.4 0.00 0.00 9.9 10.5 0.025 0.003 44.0 81 346 77.82 5.04







23.4 81.0 1893 31.11 346 8086 0.39 6. Grind Size P 80 : 125 (µm)





Assay Grade 2.25 / 2.10 652



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


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Au-Total

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(%)

TIME (Hours)


Au-Total

Cu-Total

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TIME (Hours)


Au-Total

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TIME (Hours)


Au-Total

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Au-Total

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0

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TIME (Hours)


Au-Total

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0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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N

(%)

TIME (Hours)


Au-Total

Cu-Total

0

10

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

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(%)

TIME (Hours)


Au-Total

Cu-Total

0

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(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4WH 4211



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 1.1 8.1

0 63.1 1.00 1.36 11.3 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 60.0 0.00 0.00 6.6 10.5 0.030 0.065 12.3 3.07 81 122 55.07 0.88

2 55.6 0.54 0.00 6.6 10.5 0.023 0.030 17.5 4.40 96 186 63.80 1.27

4 50.8 0.00 0.00 8.1 10.5 0.035 0.010 26.7 4.78 114 252 73.90 1.87

6 46.7 0.00 0.00 8.5 10.6 0.030 0.005 34.6 4.14 123 282 78.60 2.34

8 41.2 0.70 0.00 7.6 10.6 0.015 0.005 40.4 5.48 126 322 80.08 2.70

12 36.7 0.00 0.00 8.1 10.7 0.048 0.005 53.3 4.54 129 374 81.38 3.46

24 30.1 0.80 0.00 8.9 10.2 0.010 0.003 66.5 6.58 132 460 82.48 4.27

36 25.4 0.64 0.00 8.2 10.3 0.018 0.003 92.9 4.68 138 460 84.38 5.71

48 25.4 0.00 0.00 9.8 10.5 0.025 0.003 122.0 141 562 85.18 7.36







25.4 141.0 3583 37.66 562 14280 0.39 6. Grind Size P 80 : 125 (µm)





Assay Grade 3.77 / 3.78 1088



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


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PROJECT A13575


TEST No WH 4212



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 0.9 8.1

0 63.1 1.00 1.58 11.0 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.9 0.00 0.00 7.6 10.1 0.033 0.010 7.2 6.16 12 40 58.37 1.26

2 53.0 0.54 0.00 8.7 10.2 0.023 0.010 10.6 3.92 14 56 66.93 1.84

4 47.6 0.00 0.00 9.0 10.2 0.040 0.003 15.3 5.36 15 78 69.78 2.63

6 41.8 0.00 0.00 9.0 10.2 0.028 0.003 19.3 5.83 16 126 73.36 3.40

8 34.0 0.64 0.00 9.5 10.1 0.018 0.003 22.3 7.82 17 130 76.50 3.86

12 28.2 0.00 0.00 9.4 10.2 0.033 0.003 29.8 5.80 18 162 79.06 5.06

24 23.0 0.90 0.00 8.3 9.8 0.005 0.003 43.1 5.22 19 336 81.17 7.42

36 17.6 0.84 0.00 8.4 10.0 0.008 0.003 66.4 5.35 20 362 82.90 10.95

48 17.6 0.00 0.00 9.3 10.1 0.010 0.003 91.6 21 404 84.22 14.77







17.6 21.0 370 27.80 404 7118 0.53 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.44 / 0.50 390



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


0

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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50

EX

TR

AC

TIO

N

(%)

TIME (Hours)


Au-Total

Cu-Total

PROJECT A13575


TEST No WH 4213



DATE OCTOBER 2011

ADDITIONS



Yao (g) (%) (%)

3000.0 2000.0 1.1 8.1

0 63.1 1.00 1.74 11.1 0.050 0.000 0.0 0.00 0 0 0.00 0.00

1 56.8 0.00 0.00 7.6 10.3 0.033 0.010 7.7 6.28 12 46 55.93 0.86

2 51.8 0.00 0.00 8.3 10.3 0.028 0.003 11.3 4.96 15 72 67.12 1.27

4 47.3 0.60 0.00 8.8 10.2 0.020 0.003 16.0 4.59 16 106 70.85 1.79

6 42.7 0.00 0.00 8.8 10.2 0.043 0.003 21.4 4.59 17 130 74.25 2.35

8 37.4 0.00 0.00 9.1 10.3 0.028 0.003 26.2 5.26 18 154 77.32 2.85

12 32.8 0.70 0.00 9.2 10.2 0.015 0.003 33.8 4.60 18 306 77.32 3.83

24 29.2 0.74 0.00 8.3 10.2 0.013 0.003 58.3 3.59 18 334 77.32 6.18

36 22.5 0.64 0.00 8.2 10.3 0.018 0.003 82.1 6.71 18 342 77.32 8.43

48 22.5 0.00 0.00 9.2 10.3 0.018 0.010 110.0 18 454 78.40 11.17







22.5 18.0 405 29.16 454 10215 0.48 6. Grind Size P 80 : 125 (µm)





Assay Grade 0.62 / 0.60 536



SAMPLE



Solids (g)

Solution (mls)


Final Carbon (g)

Total Extraction


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Documents

App Figure 9 – Observed vs Predicted Conventional Crusher