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Quesnel
Dawson
Creek
Williams Lake
PRINCE
GEORGE
Fort St. John
Taylor
Chetwynd
Mackenzie
Vanderhoof
Hudson's Hope
Fort St. James
Wells
Hixon
Penny
Rolla
Likely
Tachie
Kersley
Horsefly
Red Rock
Ferndale
Tintagel
Sugarcane
Southbank
Bear Lake
Alexandria
Australian
Ootsa Lake
Anahim Lake
Fort Fraser
Decker Lake
McLeod Lake
Alexis Creek
Willow
River
Upper Fraser
Moberly Lake
Charlie
Lake
Pendleton Bay
Tumbler Ridge
Germansen Landing
Granisle
Burns Lake
Fraser Lake
Pouce
Coupe
WILLISTON
LAKE
STUART
LAKE
BABINE
LAKE
OOTSA
LAKE
QUESNEL
LAKE
Takla
Lake
Francois
Lake
Carp
Lake
Trembleur
Lake
Tchentlo
Lake
Tezzeron
Lake
Pinchi
Lake
Fraser
Lake
Charlotte
Lake
Horsefly
Lake
Chuchi
Lake
Knewstubb
Lake
Tetachuck
Lake
Inzana
Lake
Cheslatta
Lake
Tchesinkut
Lake
Great Beaver
Lake
Clearwater
Lake
Mesilink
a
River
OsilinkaRiver
Omineca River
Graham R
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Kiskatinawa
River
Mu rray
River
Murray R
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Suku
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River
Pine River
Pine
River
River
Parsnip
R I V E R
Chilanko
River
Wapiti
Rive r
River
McGregor
Fraser
River
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River
Willow
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Cariboo River
Horsefly River
West
Road River
P E A C E
R
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Chilco
tin
Clisbako R
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Nazko
River
Atnarko
R
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Dean
West Road
River
Chelaslie River
Chilako
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Chilako River
Nechako R
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Nechako R
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Salmon River
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GIBRALTAR
MT. POLLEY
ENDAKO
PINCHI LAKE
GRANISLE
BELL
MT. MILLIGAN
KWANIKA
QUEST PROJECT1:500 000 GEOCHEMISTRY - CSIRO SOM ANALYSIS: SAMPLE SITES COLOURED BY SIROSOM-DERIVED K-MEANS CLUSTERING
1:250 000 NTS SHEETS 93A,B,C,F,G,H,I,J,K,N,O,PPART OF 1:250 000 NTS SHEETS 82M; 83D,E,L,M; 84D; 92M,N,O,P; 93D,E,L,M AND 94A,B,C,D
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\
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Pacific O
cean
Vancouver
VICTORIA
Prince
George
YUKON TERRITORY
ALBERTA
UNITED STATES OF AMERICA
UNITED STATES OF AMERICA
BRITISH COLUMBIA
Location Map
QUESTAirborne Geophysical
Survey Area
National Topographic System Index
094F
WARE
083L
WAPITI
093O
PINE PASS
094G
TRUTCH
093H
MCBRIDE
093B
QUESNEL
103P
NASS RIVER
103I
TERRACE
093D
BELLA COOLA
093L
SMITHERS
093M
HAZELTON
083D
CANOE RIVER
092M
RIVERS INLET
084D
CLEAR HILLS
093C
ANAHIM LAKE
092O
TASEKO LAKES
093K
FORT FRASER
103A
LAREDO SOUND
102P
QUEENS SOUND
083E
MOUNT ROBSON
093G
PRINCE GEORGE
093J
MCLEOD LAKE
083M
GRANDE PRAIRIE
093N
MANSON RIVER
093A
QUESNEL LAKE
094A
CHARLIE LAKE
093P
DAWSON CREEK
104H
SPATSIZI RIVER
104A
BOWSER LAKE
082M
SEYMOUR ARM
103H
DOUGLAS CHANNEL
093F
NECHAKO RIVER
094B
HALFWAY RIVER
094H
BEATTON RIVER
093E
WHITESAIL LAKE
093I
MONKMAN PASS
094C
MESILINKA RIVER
092P
BONAPARTE LAKE
092N
MOUNT WADDINGTON
084E
CHINCHAGA RIVER
094D
MCCONNELL CREEK
094E
TOODOGGONE RIVER
Survey Location Map
GE
OS
CIE
NC
E B
C -
QU
ES
T -
GE
OC
HE
MIS
TR
Y -
CS
IRO
SO
M A
NA
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SIS
GE
OS
CIE
NC
E B
C -
QU
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T -
GE
OC
HE
MIS
TR
Y -
CS
IRO
SO
M A
NA
LY
SIS
Stream (9323)
Lake (5696)
Geoscience BC is an industry-led, industry-focused not for profit society that works to attract mineral and oil and gas investment to British Columbia through collection and marketing of geoscience data.
www.geosciencebc.com
QUEST PROJECT1:250 000 NTS SHEETS 93A,B,C,F,G,H,I,J,K,N,O,P
PART OF 1:250 000 NTS SHEETS 82M; 83D,E,L,M; 84D; 92M,N,O,P; 93D,E,L,M AND 94A,B,C,D
1 : 500,000
Universal Transverse Mercator Projection, Zone 10Horizontal Datum: North American Datum 1983
Mean magnetic declination 2009, 19°26´E, decreasing 16.6´ annually. Readings vary from17°42´E in the southeast corner to 20°47´E in the northwest corner of the map.
September 16, 2009
0 25 505 10 15 20 kms
Citation: Geoscience BC (2009): QUEST Project - Geochemistry - CSIRO SOM Analysis: Sample Sites Coloured by SiroSOM-Derived K-means Clustering; Geoscience BC, Map 2009-14-01, scale 1 : 500 000.
MAP 2009-14-01
GEOCHEMISTRY - CSIRO SOM ANALYSISSample Sites Coloured by SiroSOM-Derived K-means Clustering
QUEST Geochemistry CSIRO SOM Analysis - K-means Clustering
The levelled and imputed element grids (Barnett and Williams, 2009) were intersected by the sample locations and the values assigned to the sample point. Note, missing element values have been imputed.
The SiroSOM procedure assigns each sample to a best-matching unit (BMU). Samples that are similar tend to be assigned to either the same BMU or to a BMU that is nearby on the self-organized map (SOM). The SOM-derived BMU “vectors” were analyzed using K-means to produce 20 classes. By inspection, the user can determine which sample sites have similar global statistics. Sites with similar statistics will be assigned to the same K-means cluster. Anomalism for each sample is then determined using the statistics of the K-means cluster it has been assigned to.
Users should reference Figure 2(b) in Fraser and Hodgkinson (2009), which details the distribution of the K-mean classes over the self organized map and Figure 3, which shows the elemental component plots. By combining information present on these two figures, one can assess the elemental significance of the various clusters; and this understanding can be enhanced by noting the spatial context of particular clusters.
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A L
B E
R T
A
Data Analysis
Topographic Data
Data Sources
Acknowledgments
Fraser, S.J., and Hodgkinson, J.H., (2009): An Investigation Using SiroSOM for the Analysis of QUEST Stream-Sediment and Lake-Sediment Geochemical Data. September 2009, Geoscience BC, Report 2009-14: CSIRO Exploration and Mining Report 2009/983. 64p.
Barnett, C. T. and Williams, P. M. (2009): Using geochemistry and neural networks to map geology under glacial cover, Geoscience BC, Report 2009-3.
Jackaman, W. (2008): Regional Stream Sediment and Water Geochemical Data, Pine Pass, British Columbia (NTS 93O); Geoscience BC, Report 2008-7
Jackaman, W. (2008): Regional Lake Sediment and Water Geochemical Data, Northern Fraser Basin, Central British Columbia (parts of NTS 93G, H, J, K, N & O); Geoscience BC, Report 2008-5
Jackaman, W. (2008): QUEST Project Sample Reanalysis; Geoscience BC, Report 2008-3
Jackaman, W. (2007): Regional drainage sediment and water geochemical data, South Nechako Basin and Cariboo Basin, central British Columbia (parts of NTS 92N, O, P, 93A, B); Geoscience BC, Report 2007-6, 332 p.
Lett, R.E.W. and Bluemel, B. (2006): Re-analysis of regional geochemical survey stream sediment samples from the McLeod Lake area (NTS map sheet 093J); BC Ministry of Energy, Mines and Petroleum Resources, Geofile 2006-09, 220 p.
Jackaman, W. (2006): Regional drainage sediment and water geochemical data, Anahim Lake and Nechako River, central British Columbia (NTS 93C & 93F); Geoscience BC, Report 2006-4, 463 p.
Lett, R.E.W. (2005): Regional Geochemical Survey Database on CD, BC Ministry of Energy, Mines and Petroleum Resources, Geofile 2005-17.
Massey, N.W.D, MacIntyre, D.G., Desjardins, P.J. and Cooney, R.T. (2005): Digital Geology Map of British Columbia: Whole Province; B.C. Ministry of Energy and Mines, Geofile 2005-1.
Geoscience BC Ministry of Energy, Mines and Petroleum Resources
Cartography by Fion Ma, Geoscience BC
Image processing by Peter Kowalczyk, Geoscience BC
Numerical analysis by CSIRO, Australia -
Geoscience BC is funded through grants from the Provincial Government of British Columbia.
QUEST is funded in partnership with the Northern Development Initiative Trust -
Geochemistry Data
Levelled Data
Original Data
www.geosciencebc.com www.empr.gov.bc.ca/mining/geoscience
www.csiro.au
www.nditrust.ca
K-means Clusters
Note: Samples were assigned to SOM-derived BMU nodes. These nodes then were "clustered"by K-means to yield 20 classes. Field sample sites are coloured according to the cluster theirnode has been assigned.
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Legend
Airborne Geophysical Survey Area
Provincial boundary
Railroad (unclassified)
Road (unclassified)
Mineral deposit (selected)
Populated place (unclassified)
Stream sediment sample
Lake sediment sample
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Disclaimer: While every effort has been taken to ensure the accuracy of the information in this map, the data are provided on an 'as-is' basis, without any warranty, guarantee or representation of any kind, whether expressed or implied. It is the responsibility of the user to check the facts before entering any financial or other commitment based upon this information.
