Calibre mining April 2012 CXB Final

Advanced Gold, Copper and Silver Exploration

Mining Triangle, Nicaragua TSX.V: CXB APRIL 2012

FORWARD LOOKING STATEMENTCertain statements in this document constitute “forward looking statements” which may not

be based on historical fact. Such forward looking statements involve known and unknown

risk, uncertainties and other factors which may cause the actual results, performance

or achievements of the Company, or industry results to be materially different from any

future results, performance, or achievements expressed or implied by such forward looking

statements. Such factors include, among others, the following: actual results of exploration and

development activities; the costs and timing of the development of new deposits; future prices

of precious and base metals; accidents; risks inherent in mineral exploration; risks associated

with development, construction and mining operations; restrictions on foreign ownership; the

Company’s history of operating losses and uncertainty of future profitability; uncertainty of

access to additional capital; and environmental liability claims and insurance. This presentation

is not an offer to purchase securities and does not constitute an offering document under

Securities legislation.

STABLE ENVIRoNMENT: PRoLIFIC MINING DISTRICT

» Stable government, with a political environment favorable to mining

» Prolific “Mining Triangle” has produced over 7.9M oz’s of gold

» Calibre and its partners control over 860 km2 of underexplored project area in the region

TEAM AND PARTNERS: EXPERIENCED, SuCCESSFuL

» Calibre Mining Proven management with decades of mining and public company experience

» Featherstone Capital Strong history of success. Have created billions of dollars in Shareholder Value

» B2Gold Nicaragua’s largest gold producer with two mines and a strong portfolio of development assets

» Alder Resources Experienced management with focus on exploration in the Americas

Calibre’s Borosi Gold-Copper-Silver Project Mining Triangle of Northeast Nicaragua, Central America

INvESTMENT HIGHLIGHTSNEw DISCoVERy: PRIMAVERA GoLD-CoPPER PRoJECT

» Primavera porphyry gold/copper discovery

» Ten drill holes completed totaling 3,199.10m

» Discovery drill hole (Jan. 2012): 261.7m grading 0.78 g/t Au, 0.30% Cu

» Joint Venture with B2Gold. B2Gold(Nicaragua’s largest gold producer) can earn a 51% interest in 322km2 of concessions including Primavera

» Second diamond drill rig being added to the program (2 rigs total)

» 25km2 porphyry gold/copper target area at Primavera

ESTABLIShED PRoJECTS: PRoVEN PARTNERS

» Calibre 100%-owned NI 43-101 Compliant Inferred Resource totaling 835,000 ozs Gold and 4.3 million ozs Silver

» 100%-owned Riscos de Oro epithermal gold-silver project: 9,427m delineation drilling completed to date

» Joint Venture with Alder Resources Ltd. on the Rosita copper skarn project. Alder will invest up to $4 million, for a 65% earn in. Drilling underway at Rosita

5CALIBREMINING.COM4 CALIBRE INVESTMENT hIGhLIGhTS

CALIBRE MINING CoRP

Edward Farrauto, CGA President & CEO, Director » 20+ years experience as CFO and director of public companies; » Founder and director of several public companies;

Paulo Santos, CA Chief Financial Officer » 10+ years experience with public accounting, auditing, and regulatory

compliance

Greg Smith, P.Geo VP Exploration » 23+ years exploration experience with both junior & senior operations; » Involved in successfully outlining 10+ million ounces of gold discoveries.

George Salamis Director » 20+ years exploration, development and operations experience; » President & CEO of Edgewater Exploration Ltd.

Hon. John Reynolds, P.C. Director » 35+ years experience in politics, former Member of Parliament, and a

member of the Queen’s Privy Council for Canada;

» Strategic Senior Advisor at McMillan LLP.

FEAThERSToNE CAPITAL

Douglas B. Forster, M.Sc., P.Geo Executive Chairman of the Calibre Board » President & CEO of Featherstone Capital Inc. » 30+ years of resource project development, M&A, equity finance and

public company management; » Founder and director of numerous public companies;

Blayne Johnson Lead Director of Calibre Board » 25 years of capital markets experience; » Former VP of First Marathon Securities » Chairman of Featherstone Capital Inc.

EXPERIENCED TEAM PARTNERS

B2GoLD

Vancouver based gold producer led by Clive Johnson and Tom Garagan, with two gold mines in Nicaragua and a strong portfolio of development and exploration assets in Nicaragua, Colombia and Uruguay. B2Gold was founded in 2007 by the former executive and management team of Bema Gold Corporation.

ALDER RESouRCES

Toronto-based junior exploration company with a focus on exploration for base and precious metals in the Americas.

SHARE STRUCTURE Issued & outstanding 167,910,918

options 15,855,000

yamana warrants 10,000,000*

Fully Diluted 193,765,918

Fully Diluted Cash Position $12,417,250

working Capital $1,000,000

* In conjunction with the purchase of the Borosi Concessions in 2009, Calibre granted 10 million warrants to yamana Gold (5 million exercisable at $0.50 and 5 million exercisable at $1.00). The warrants expire in July 2014 and are only exercisable if Calibre delineates at least 2.5 million NI 43-101 Measured and Indicated compliant ounces of gold equivalent (total of gold and copper resources).

7CALIBREMINING.COM6 CALIBRE TEAM

NICARAGUA: STAbLE, UNDER EXPLORED MINING ENvIRONMENT» Democratic Republic with President Ortega elected to a new 5 year term

in Nov. 2011

» Gold is Nicaragua’s No. 3 export

» Gold has helped Nicaragua’s economy grow by 4% annually in the past year, the highest rate in Central America

» Annual gold production has more than doubled in the past 3 years

» Supportive mining laws, including favourable tax regime

» 25 year exploration and 50 year exploitation permits

» Economist Intelligence Unit ranks Nicaragua as one of the safest countries in Central America

HONDURAS

NICARAGUA

BorosiConcessions

Managua

LakeNicaragua

La Libertad (Gold Mine)B2GOLD CORP.

El Limon (Gold Mine)B2GOLD CORP.

Bonanza(Gold Mine)

Siuna Rosita and Primavera

CaribbeanSea

Pacific Ocean

EL SALVADOR

COSTA RICA

PANAMA

Riscos de Oro

Puerto Cabezas (Airport)

0 20 40 80 120 160km

bOROSI CONCESSION AREA

9CALIBREMINING.COM8 woRKING IN NICARAGuA

Cerro Cola BlancaForest Reserve

Prospects

100% Calibre

Calibre-Alder Option Area

Calibre-B2Gold Option Area

Cerro BanacruzForest Reserve

NICARAGUA

Borosi Concessions

Managua

275k

m

0 5 10 15 20km

Siuna

Riscos de Oro

Primavera

Cerro Aeropuerto

Rosita

Minnesota

Santa Rita

Bonanza

La Luna

Bonanza (Gold Mine)2.8M OZS PAST PRODUCTION

LA LUZ (Gold Mine)2.7M OZS PAST PRODUCTION

bOROSI GOLD, SILvER AND COPPER CONCESSIONS – “MINING TRIANGLE”

3

Cerro Cola BlancaForest Reserve

Prospects

100% Calibre

Calibre-Alder Option Area

Calibre-B2Gold Option Area

Cerro BanacruzForest Reserve

NICARAGUA

Borosi Concessions

Managua

275k

m

0 5 10 15 20km

Siuna

Riscos de Oro

Primavera

Cerro Aeropuerto

Rosita

Minnesota

Santa Rita

Bonanza

La Luna

Bonanza (Gold Mine)2.8M OZS PAST PRODUCTION

LA LUZ (Gold Mine)2.7M OZS PAST PRODUCTION

6

2

5

4

1

CALIBRE/B2GoLD1 PRIMAVERA Gold-Copper

2 MINNESoTA Gold-Copper

100% CALIBRE

3 CERRo AERoPuERTo Gold-Silver NI43-101 Inferred Resource 707,750 oz Au 3.14M oz Ag

4 LA LuNA Gold-Silver NI43-101 Inferred Resource 127,700 oz Au 1.74M oz Ag

5 RISCoS DE oRo Gold-Silver 9,427m of drilling completed

CALIBRE/ALDER RESouRCES

6 SANTA RITA Copper-Gold Former open pit copper mine

produced 305M lbs Cu

11CALIBREMINING.COM10 BoRoSI CoNCESSIoNS AREA

PRIMAvERA GOLD/COPPER PROJECT

PRoJECT hIGhLIGhTS

» Road accessible with national power grid located 1.2 km from the project, 8km from town of Rosita

» Subdued topography with main land use being subsistence farming and ranching.

» Joint Venture with B2Gold: B2Gold can earn a 51% interest in Primavera, as well as 322 sq km of surrounding concessions, by spending $8M by June, 2014 ($5.3 spent to March 2012). B2Gold may elect, once earn-in is complete, to carry an individual prospect within the concession area through a Preliminary Feasibility Study for an additional 14% interest in the project

» Airborne geophysical survey outlines a large 5km by 5km interpreted intrusive/volcanic complex

» 10 drill holes completed totaling 3199.10m

» Second diamond drill rig being added to the program (2 rigs in total)

» Primavera is geologically similar to Newcrest Mining Limited’s Cadia-Ridgeway porphyry gold/copper mine in NSW, Australia where underground and open pit reserves contain 23.6M oz Au and 8.3B lbs Cu*

AIRbORNE RADIOMETRIC SURvEY

PRIMAVERA GoLD-CoPPER DISCoVERy

Intrusive/Volcanic Complex

Borosi Concessions

0km 20 40

*Newcrest Mining Limited website

13CALIBREMINING.COM12 PRIMAVERA PROJECT

PRIMAvERA GOLD/COPPER PROJECT SOIL GEOCHEMISTRY

GOLD IN SOIL GEOCHEMISTRY

TRENCH RESULTS

Trench ID Interval (m) Gold (g/t) Copper (ppm)

PRTR11-005 51.25 1.53 680

PRTR11-010 107.00 0.78 980

PRTR11-011 179.40 0.63 997

PRTR11-012 58.00 0.70 1313

PRTR11-013 49.50 0.25 1100

PRTR11-014 51.70 0.42 1286

HIGHLIGHTS

COPPER IN SOIL GEOCHEMISTRY

» Over 800 m by 300 m gold/copper soil geochemistry anomaly (open)

» Additional gold/copper soil geochem anomalies have been outlined in the 25km2 Primavera porphyry target area

» Trenches returned long intervals of continuous gold/copper mineralization including 179.4m grading 0.63g/t Au and 997 ppm Cu

» Very sparse rock outcrop in region with up to 10m of overburden and saprolite

Borosi Concessions

0km 20 40

PR-12-005

PR-12-008

PR-11-003

PR-11-002PR-11-001

PR-12-009

PR-12-004

PR-12-010

PR-12-007

PR-12-006

PR-12-005

PR-12-008

PR-11-003

PR-11-002PR-11-001

PR-12-009

PR-12-004

PR-12-010

PR-12-007

PR-12-006

PR-12-011 PR-12-011


PRIMAvERA GOLD/COPPER PROJECT RESULTS 2012 PRIMAvERA DRILL HOLE INTERCEPTS

» 3,199.10 metres of diamond drilling completed in 10 holes with an ongoing program using 2 drill rigs completing a program of infill and step-out drilling at the primavera gold/copper system as well as drill testing additional porphyry and vein targets

» Gold/copper mineralization has been intersected in drill holes over a 300m by 300m area and to a depth of 300m with mineralization comprised of quartz-magnetite-chalcopyrite-bornite veins and vein stockwork within broad zones of potassically and propylitically-altered intermediate volcanic and intrusive rocks

» Primavera is geologically similar to Newcrest Mining Limited’s Cadia-Ridgeway gold/copper mine (23.6M oz Au and 8.3B lbs Cu)

Drill hole From To Length Gold Copper (m) (m) (m) (g/t) (ppm)

PR-11-001* 0.00 276.80 276.80 0.50 2,146

includes 0.00 103.00 103.00 0.85 3,240

PR-11-002* 1.5 263.20 261.70 0.78 2,966

includes 1.5 209.00 207.50 0.89 3,378

includes 74.50 209.00 134.50 1.01 3,561

PR -11-003** 4.00 327.20 323.20 0.41 1,843

includes 4.00 150.50 146.50 0.65 2,742

includes 150.50 293.00 142.50 0.22 1,197

293.00 327.20 34.20 0.13 683

PR-12-004 NSV*** NSV***

PR-12-005 207.50 372.50 165.00 0.31 1,713

207.50 224.00 16.50 0.35 1,103

224.00 270.00 46.00 0.48 3,155

270.00 312.00 42.00 0.15 749

312.00 372.50 60.50 0.27 1,452

PR-12-006 12.00 102.00 90.00 0.21 1,315

PR-12-007 7.70 255.00 247.30 0.22 1,097

includes 7.70 156.00 148.30 0.22 917

includes 156.00 197.00 41.00 0.34 1,760

includes 197.00 255.00 58.00 0.16 1,088

PR-12-008 107.65 280.00 172.35 0.48 2,401

includes 107.65 131.50 23.85 0.32 1,478

includes 131.50 187.00 55.50 0.67 3,507

includes 187.00 280.00 93.00 0.41 1,978

280.00 382.50 102.50 0.23 1,139

393.00 430.50 37.50 0.14 1,005

PR-12-009 NSV*** NSV***

PR-12-10 79.00 94.40 15.40 0.59 4,325

includes 81.00 86.00 5.00 0.51 9,644

Borosi Concessions

0km 20 40

*Holes released in news release dated January 20, 2012** Results initially released for top 127.5 metres (January 20, 2012).Hole was paused over the holiday break***No Significant valuesNote: Hole PR-12-010 was analyzed at Inspectorate’s Labs in Vancouver

PRIMAvERA DRILL PLAN


PR11-002 INTERCEPTED:

» 261.70m grading 0.78 g/t Au, 0.30% Cu

» Continuos Gold-Copper Mineralization


» 247.35m grading 0.43 g/t Au, 0.21% Cu

including 172.35m grading 0.48 g/t Au, 0.24% Cu

WEIGHTED AvERAGE GRADE ON SECTION:

» 254.52m grading 0.61 g/t Au, 0.26% Cu

PRIMAvERA GOLD/COPPER PROJECT DRILL HOLES PR11-002, PR12-008

Au (g/t)

Cu (ppm)


» 172.35m grading 0.48 g/t Au, 0.24% Cu

PICTURED DRILL INTERCEPT ASSAYED

» 5.52m @ 0.59g/t Au and 0.29% Cu (Section 196.93m-202.45m of hole PR12-008)

DRILL HOLE PR12-008

Borosi Concessions

0km 20 40

*PR12-008 was analyzed at Inspectorate Labs in Vancouver

*PR-12-008

PR-11-002


PRIMAvERA PORPHYRY GOLD/COPPER MINERALIzATION - DISTRICT POTENTIAL

25 KM PORPHYRY GOLD/COPPER

TARGET AREA

2

Copper Hill

Primavera

Santa Juana

San Francisco

District Exploration Potential» Lidar Survey Completed» Airborne geophysical survey underway» Soil geochem grids expanded» IP survey planned

PORPHYRY SYSTEMS ARE KNOWN TO

OCCUR IN CLUSTERS


HONDURAS

NICARAGUA

Caribbean Sea

Pacific Ocean

EL SALVADOR

BELIZE

COSTA RICA

PANAMA

PRIMAVERAPorphyry Gold-Copper Project

CERRO COLORADO24.8 B lbs Copper, 3.5M ozs Gold

COBRA PANAMA19.6 B lbs Copper, 4.9M ozs Gold

Deposit Tonnes Au Cu Au Eq. Contained Au Contained Cu (Mt) (g/t) (%) (g/t)* (Million ozs) (Billion lbs)

Cerro Casale 1,200 0.59 0.22 0.94 23.1 5.78

Chapada 429 0.24 0.26 0.65 3.1 2.15

El Morro 537 0.49 0.52 1.31 8.2 6.08

Agua Rica 908 0.22 0.49 1.00 22.1 9.78

Maricung 269 0.70 0.00 0.70 6.0 0.00

Alumbrera 390 0.51 0.47 1.25 6.4 4.03

Kemess South 109 0.71 0.23 1.07 2.5 0.56

Mt. Milligan 531 0.34 0.20 0.66 6.0 2.12

Cobra Panama 2,143 0.07 0.41 0.72 4.9 19.59

Cerro Colorado 1,400 0.08 0.78 1.31 3.5 24.00

Cadia-Ridgeway 1,290 0.58 0.30 1.06 23.6 8.30

Primavera** - 0.61 0.25 1.01 - -

SELECTED PORPHYRY GOLD/COPPER DEPOSITS/MINES

* Au Eq. (g/t): Gold Equivalent calculated using $1,300 oz gold and $3.00/lb copper and metallurgical recoveries and net smelter returns are assumed to be 100%.

**weighted average grade of PR-11-001, PR-11-002, PR-11-003, and PR-12-008

Resource Information derived from website Sources.

23CALIBREMINING.COM22 SELECTED PoRPhyRy GoLD/CoPPER DEPoSITS/MINES

RISCOS DE ORO PROJECT DISTRICT POTENTIAL 100% CALIBRE owNED

» Low Sulfidation Epithermal Gold-Silver Vein District

» Comparable to nearby Bonanza Camp in geology, mineralization, and structure (past production of +2.8 million ozs Au)

» Gold – Silver System extends over 7 km from the El Paraiso and Murcielago targets Northeast towards Riscos de Oro

» Completed 9,427m of resource delineation drilling at Riscos in 37 holes with epithermal gold-silver intercepts including 7.69 g/t Au, 211.80 g/t Ag over 10.6m

» Historic trenching at Murcielago adit 7.0 Km SW of Riscos returned 12.4 g/t Au over 3.0 metres

» Multiple parallel veins identified

DRILLING DETAILS» 9,427m of delineation drilling completed

» Former open pit and underground mine to 90m depth only

» Gold-Silver mineralization defined over 725m strike length to a depth of 300m

» Multiple mineralized veins and structures

DRILLING HIGHLIGHTS» RD11-012: 7.69 g/t Au, 211.80 g/t Ag over 10.6m

» RD11-010: 10.25 g/t Au, 288.25 g/t Ag over 5.4m

» RD10-009: 4.23 g/t Au, 384.86 g/t Ag over 8.53m

Borosi Concessions

0km 20 40

25CALIBREMINING.COM24 RISCoS DE oRo PRoJECT

A

A1

» Au Eq cutoff equivalent calculated using Wardrop’s estimated gold price of US$1,058/oz and silver price of US$16.57 /oz

» Mineral resources that are not mineral reserves do not have economic viability.

» Metallurgical recoveries and net smelter returns are assumed to be 100%

NI 43-101 GOLD/SILvER RESOURCES AT CERRO AEROPUERTO AND LA LUNA 100% CALIBRE owNED

Calibre Mining Corp. Global Inferred Resource (using a 0.6 g/t AuEq 1,3 cutoff grade)2

Tonnes and Grade Total ounces

Deposit Tonnes Gold Silver Au Eq1 Gold Silver Au Eq1 (g/t) (g/t) (g/t) (oz) (oz) (oz)

Cerro Aeropuerto 6,052,000 3.64 16.16 3.89 707,750 3,144,500 757,000

La Luna 2,539,000 1.56 14.01 1.78 127,700 1,143,570 146,000

835,450 4,288,070 903,000

CERRo AERoPuERTo DRILL hoLES

Borosi Concessions

0km 20 40

LA LuNA DRILL hoLES

Borosi Concessions

0km 20 40

La Luz Mine

27CALIBREMINING.COM26 CERRo AERoPuERTo AND LA LuNA PRoJECTS

FORMER SANTA RITA COPPER MINE CALIBRE/ALDER oPTIoN

» Optioned to Alder Resources; Alder to spend C$4.0 million over the next four years to earn a 65% stake in Calibre’s Rosita D Concession

» Rosita D concession: 3,356 hectares - only 5% of Calibre’s concessions in the Mining Triangle

» Historic open pit Santa Rita copper-gold mine: total historic production from skarn mineralization estimated at 305 M lbs of Cu, 177,737 ozs of Au, and 2,629,720 ozs of Ag from 5,924,572 tons of ore (Arengi, 2002)

» Recent drilling results reported by Alder include: 12m grading 0.91% Cu, 1.00 g/t Au and 16.63 g/t Ag (Alder News Release February 8, 2012)

» Phase One exploration commenced, including 8,000 metres of diamond drilling

Borosi Concessions

0km 20 40

SANTA RITA hISToRICAL oPEN PIT

29CALIBREMINING.COM28 CALIBRE/ALDER oPTIoN

SUMMARY» Nicaragua provides a favorable, stable, environment

for mining.

» The ‘Mining Triangle’ has proven potential and is under-explored.

» Calibre Mining, Featherstone Capital, B2Gold, and Alder Resources are an established, experienced team who control over 860 km2 of underexplored territory in an area that has already produced more than 7.9M oz’s of gold.

» New porphyry gold-copper discovery at Primavera with district potential.

» With up to $7 million in exploration carried by partners, Calibre is able to rapidly advance its opportunities in the Mining Triangle.

EXPLORATION TIME LINE & NEWS FLOW

INFORMATIONMark Carruthers [email protected] (604) 681.9944

Calibre Mining Corp. 1620 – 1066 west hastings St. Vancouver, BC V6E 3X1

TSX.V: CXB

calibremining.com

2012 Q1 Q2 Q3 Q4

Exploration for Porphyry Gold/Copper Systems

Calibre/B2Gold option 100% Calibre owned concessions

Target Delineation Drilling

Primavera / Calibre/B2Gold Rosita Copper Project / Calibre/Alder Resources option

Data ReviewRiscos de oro / Cerro Aeropuerto / La Luna / 100% Calibre

RESuLTSDrill results from Santa Rita and Primavera + regional porphyry gold/copper exploration and drill programs

Calibre Mining Corp. 1620 – 1066 west hastings St. Vancouver, BC V6E 3X1

TSX.V: CXB

calibremining.com

Business

Calibre mining April 2012 CXB Final