Island Group

Porphyry copper Group in British Columbia, Canada

Names and other identifiers

Tract name Insular Mixed Island- and Continental Arc (003pCu2003)
Group name Island Group
Included sites Island Copper deposit and Bay 21, Bay 29, Bay 56, Road, Rupert, and Yankee Girl prospects
Site status Group

Geographic location

Country Canada
State or province British Columbia
Geographic location -127.475016468, 50.599705134
Geologic map unit -127.475016468, 50.599705134
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 167
Age determination method U-Pb zircon
Age range 167 Ma (U-Pb zircon); 171 Ma (Ar-Ar)
Age reference unknown
Minerals bornite, chalcopyrite, galena, molybdenite, pyrite, sphalerite
Associated rocks rhyodacite porphyry, quartz-feldspar porphyry
Tectonic setting mixed
Stratigraphic age Middle Jurassic

Commodity and development information

Development status Past Producer
Major commodities Cu, Mo, Ag
Minor commodities Au, Zn, Pb
Trace commodities Re
Tonnage (Mt) 377Mt
Cu grade (%) 0.41%
Mo grade (%) 0.017%
Au grade (g/t) 0.19g/t
Ag grade (g/t) 1.4g/t
Contained copper 1,500,000t
Gold-Moly ratio 11

Reference information

Comments This group record includes data for the Island Copper deposit and Bay 21, Bay 29, Bay 56, Road, Rupert, and Yankee Girl prospects; the location information and the total weighted average resource data represent the Island Copper deposit.
Study area name British Columbia and Yukon Territory
References MINFILE BC (2009); Sutherland Brown (1976); Schroeter (1995); Singer and others (2008); Sinclair (2007)
Site reference Mihalasky and others (2011, revised 2013)
MINFILE BC, 2009, MINFILE Mineral inventory: British Columbia Ministry of Energy, Mines and Petroleum Resources, MINFILE database, total records 12,523, accessed December 2009, at
Sutherland Brown, A., 1976, ed., Porphyry deposits of the Canadian Cordillera: The Canadian Institute of Mining and Metallurgy, Special Volume 15, the Charles S. Ney Volume, 510 p., 2 pl., scale 1:250,000,000.
Schroeter, T.G., ed., 1995, Porphyry deposits of the northwestern Cordillera of North America: Canadian Institute of Mining, Metallurgy and Petroleum Special Volume 46, 888 p.
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at
Sinclair, W.D., 2007, Porphyry Deposits, in Goodfellow, W.D., ed., Mineral deposits of Canada—A synthesis of major deposit-types, district metallogeny, the evolution of geological provinces, and exploration methods: Geological Association of Canada, Mineral Deposits Division, Special Publication no. 5, p. 223–243.