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Intermontane Island-Arc Cu-Au

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Triassic and Jurassic alkalic igneous rocks of accreted island arcs that formed offshore of western North America
Tract ID 003pCu2002x
Country Canada-United States of America
Commodity Cu
Study area name British Columbia and Yukon Territory and United States
Tectonic setting island arc
Deposit type porphyry copper
Grade-tonnage model Porphyry copper, Cu-Au subtype (Singer and others, 2008)
Geologic age
Geologic feature age Triassic through Jurassic
Generalized age Mesozoic
Oldest rocks age 251Ma
Youngest rocks age 145.5Ma
Age range 105.5Ma
Identified Cu resources 24,000,000metric tons
Known prospects 57
Mean Cu (t/sq km) 200t/sq km
Map scales used 500K

Results of the assessment

Assessment date 2013
Estimators Steve Ludington, Jane Hammarstrom, Gilpin Robinson, and 1996 Team
Assessment depth 1km
Quantitative assessment Yes

Estimated number of deposits

Number of deposits Confidence level
3 90%
6 50%
14 10%
14 5%
14 1%
Mean estimated deposits 7.3 ±4.16 (0.57%)
Probability of mean 0.34
Probability of no copper 0.03

Estimated deposit density

Known
deposits		 Total
deposits		 Area
(sq km)		 Deposit density
per 100,000 sq km
12 19.3 109,900 18

Mean estimated tonnage

Copper 22,000,000
Molybdenum 130,000
Gold 1,600
Silver 7,300
Ore 4,500

Undiscovered copper resource

Confidence level 95% 90% 50% 10% 5%
Tonnage 680,000 2,200,000 14,000,000 56,000,000 72,000,000

Economic analysis

Fraser country Canada (BC*)
Fraser type 0.61%
Fraser high 0.38%
Typical cost 0.79%
High cost 0.21%
Infrastructure setting Mixed
Comments on depth default
Expected depth distribution
0 - 250m 0.25
250m - 500m 0.25
500m - 1km 0.5
Economically recoverable resources
Copper 14,000,000t
Molybdenum 62,000t
Gold 760t
Silver 4,200t
Probability no econ recoverable 0.35
Econ NPV 4,200x $1M
Exp dollars 31.88x $1M/100,000 sq km
Exp value class Medium

Bibliographic references

General Mihalasky and others (2011, revised 2013)
Economic Robinson and Menzie (2012)
Mihalasky, M.J., Bookstrom, A.A., Frost, T.P., and Ludington, S., with contributions from Logan, J.M., Panteleyev, A., and Abbot, G., 2011, revised 2013, Porphyry copper assessment of British Columbia and Yukon Territory, Canada: U.S. Geological Survey Scientific Investigations Report 2010–5090–C, v. 1.1, 128 p., http://pubs.usgs.gov/sir/2010/5090/c/.Robinson, G.R., Jr., and Menzie, W.D., 2012, Economic filters for evaluating porphyry copper deposit resource assessments using grade-tonnage deposit models, with examples from the U.S. Geological Survey global mineral resource assessment (ver 1.2, March 2014): U.S. Geological Survey Scientific Investigations Report 2010–5090–H, 21 p., http://pubs.usgs.gov/sir/2010/5090/h/.

Deposits and prospects associated with this tract

Name Type State Country Development Details
Misty deposit British Columbia Canada Past Producer Details
Big Onion deposit British Columbia Canada Prospect Details
Afton deposit British Columbia Canada Past Producer Details
Ajax JV deposit British Columbia Canada Past Producer Details
Alabama deposit British Columbia Canada Prospect Details
Axe deposit British Columbia Canada Past Producer Details
Axe South zone deposit British Columbia Canada Prospect Details
Axe West zone deposit British Columbia Canada Prospect Details
Chuchi deposit British Columbia Canada Prospect Details
Copper Mountain deposit British Columbia Canada Past Producer Details
Crescent prospect British Columbia Canada Past Producer Details
DM-Audra-Crescent deposit British Columbia Canada Prospect Details
Galaxy deposit British Columbia Canada Past Producer Details
Galore deposit British Columbia Canada Prospect Details
Galore Central deposit British Columbia Canada Prospect Details
Galore Copper Canyon deposit British Columbia Canada Prospect Details
Galore Junction deposit British Columbia Canada Prospect Details
Galore North Junction deposit British Columbia Canada Prospect Details
Galore Southwest deposit British Columbia Canada Prospect Details
Minto deposit Yukon Territory Canada Producer Details
Galore West Fork Glacier deposit British Columbia Canada Prospect Details
Aurizon Gold zone prospect British Columbia Canada Occurrence Details
Iron Mask deposit British Columbia Canada Past Producer Details
Jajay deposit British Columbia Canada Prospect Details
Kerr deposit British Columbia Canada Prospect Details
Lloyd-Nordik deposit British Columbia Canada Prospect Details
Mitchell deposit British Columbia Canada Prospect Details
Mount Milligan deposit British Columbia Canada Prospect Details
Mount Polley deposit British Columbia Canada Prospect Details
Primer North zone deposit British Columbia Canada Prospect Details
Rainbow deposit British Columbia Canada Prospect Details
Red Chris deposit British Columbia Canada Prospect Details
Sulphurets Gold deposit British Columbia Canada Prospect Details
TAM deposit British Columbia Canada Prospect Details
Williams Creek deposit Yukon Territory Canada Prospect Details
Ace prospect British Columbia Canada Occurrence Details
Admiral Dewy prospect British Columbia Canada Occurrence Details
All Alone Dome prospect British Columbia Canada Occurrence Details
Ann North prospect British Columbia Canada Occurrence Details
Aplite Creek prospect British Columbia Canada Occurrence Details
ATO prospect British Columbia Canada Prospect Details
Auddie prospect British Columbia Canada Occurrence Details
Big Bulk prospect British Columbia Canada Prospect Details
Blue Jay prospect British Columbia Canada Occurrence Details
Bornite prospect British Columbia Canada Occurrence Details
Camp prospect British Columbia Canada Occurrence Details
Clay prospect British Columbia Canada Occurrence Details
Coke prospect British Columbia Canada Occurrence Details
COL prospect British Columbia Canada Prospect Details
Copper Creek prospect British Columbia Canada Occurrence Details
Deep Gulch prospect British Columbia Canada Occurrence Details
Dick Creek prospect British Columbia Canada Occurrence Details
Discovery prospect British Columbia Canada Occurrence Details
Duke of York prospect British Columbia Canada Occurrence Details
Eagle prospect British Columbia Canada Occurrence Details
Falcon prospect British Columbia Canada Occurrence Details
Fargo prospect British Columbia Canada Occurrence Details
Grizzly prospect British Columbia Canada Prospect Details
Fraser prospect British Columbia Canada Occurrence Details
Friday Creek prospect British Columbia Canada Occurrence Details
G.E. prospect British Columbia Canada Prospect Details
Galore North Rim prospect British Columbia Canada Occurrence Details
Galore Saddle prospect British Columbia Canada Occurrence Details
Grey Mask prospect British Columbia Canada Occurrence Details
Hat prospect British Columbia Canada Occurrence Details
Heath #1 prospect British Columbia Canada Occurrence Details
Hilltop prospect British Columbia Canada Occurrence Details
Hoey prospect British Columbia Canada Occurrence Details
HU prospect British Columbia Canada Occurrence Details
ILK prospect British Columbia Canada Occurrence Details
Jennie Silkman prospect British Columbia Canada Occurrence Details
Jeno prospect British Columbia Canada Occurrence Details
Murphy Lake prospect British Columbia Canada Occurrence Details
Joker prospect British Columbia Canada Prospect Details
June Bug prospect British Columbia Canada Occurrence Details
Katie prospect British Columbia Canada Occurrence Details
Kimberly prospect British Columbia Canada Prospect Details
Log prospect British Columbia Canada Occurrence Details
Lucky prospect British Columbia Canada Occurrence Details
MacKenzie prospect British Columbia Canada Occurrence Details
Man prospect British Columbia Canada Occurrence Details
Marquis of Lorne prospect British Columbia Canada Occurrence Details
Maxine prospect British Columbia Canada Past Producer Details
MFJ prospect British Columbia Canada Occurrence Details
Miner prospect British Columbia Canada Occurrence Details
Moss prospect British Columbia Canada Occurrence Details
Mouse Mountain prospect British Columbia Canada Past Producer Details
Oriole prospect British Columbia Canada Past Producer Details
Oronoco prospect British Columbia Canada Occurrence Details
Osilinka prospect British Columbia Canada Prospect Details
Peach 3 prospect British Columbia Canada Occurrence Details
Peach-Melba prospect British Columbia Canada Occurrence Details
Pine (Axe-Primer) prospect British Columbia Canada Occurrence Details
Pip prospect British Columbia Canada Occurrence Details
Primer South zone prospect British Columbia Canada Past Producer Details
Python prospect British Columbia Canada Past Producer Details
Rats prospect British Columbia Canada Occurrence Details
Ray prospect British Columbia Canada Occurrence Details
Rayfield Copper prospect British Columbia Canada Occurrence Details
Reco prospect British Columbia Canada Occurrence Details
Redgold prospect British Columbia Canada Prospect Details
Rum prospect British Columbia Canada Occurrence Details
Siwash prospect British Columbia Canada Occurrence Details
Skook prospect British Columbia Canada Occurrence Details
SRM prospect British Columbia Canada Occurrence Details
Star prospect British Columbia Canada Past Producer Details
TAK prospect British Columbia Canada Occurrence Details
Thalia prospect British Columbia Canada Occurrence Details
Tim #1 prospect British Columbia Canada Occurrence Details
Vector prospect British Columbia Canada Occurrence Details
Virginia prospect British Columbia Canada Past Producer Details
Voigt prospect British Columbia Canada Prospect Details
Wolverine prospect British Columbia Canada Occurrence Details
Wood GP prospect British Columbia Canada Prospect Details
Worldstock prospect British Columbia Canada Prospect Details
Kelsey deposit Washington United States Occurrence Details
Big Kidd prospect British Columbia Canada Occurrence Details
Dorothy prospect British Columbia Canada Occurrence Details
Miracle prospect British Columbia Canada Occurrence Details
Phil prospect British Columbia Canada Occurrence Details
Timber prospect British Columbia Canada Occurrence Details
Afton-Ajax Group Group British Columbia Canada Past Producer Details
Axe-Primer Group Group British Columbia Canada Past Producer Details
Copper Mountain Group Group British Columbia Canada Past Producer Details
Galore Creek Group Group British Columbia Canada Prospect Details
Lorraine Group Group British Columbia Canada Prospect Details
Sulphurets Group Group British Columbia Canada Prospect Details
Polley Group Group British Columbia Canada Prospect Details
Lac La Heche Group Group British Columbia Canada Occurrence Details