Porphyry copper deposit in British Columbia, Canada

Names and other identifiers

Alternate names Expo
Tract name Insular Mixed Island- and Continental Arc (003pCu2003)
Group name Hushamu Group
Included sites South MacIntosh, NW Expo; Group includes Hushamu and Red Dog deposits and HEP prospect.
Site status deposit

Geographic location

Country Canada
State or province British Columbia
Geographic location -127.858116542, 50.675305089
Geologic map unit -127.858116542, 50.675305089
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 170Ma
Age determination method U-Pb zircon
Age range 170 Ma (U-Pb zircon); 170 Ma (Ar-Ar)
Age reference unknown
Minerals bornite, chalcopyrite, magnetite, pyrite
Associated rocks quartz diorite porphyry, quartz monzonite, diorite, feldspar porphyry
Tectonic setting mixed
Stratigraphic age Middle Jurassic

Commodity and development information

Development status Prospect
Major commodities Cu, Au, Mo
Tonnage (Mt) 735Mt
Cu grade (%) 0.198%
Mo grade (%) 0.011%
Au grade (g/t) 0.247g/t
Contained copper 1,460,000t
Gold-Moly ratio 22

Reference information

Comments 1975, resource estimated; 1980 revised; transitional to epithermal.
Study area name British Columbia and Yukon Territory
References MINFILE BC (2009); Schroeter (1995); Schroeter and others (2006); DeGrace and others (2008); Sinclair (2007); Singer and others (2008); Western Copper Corp. (2008)
Site reference Mihalasky and others (2011, revised 2013)
DeGrace, John; Grant, Brian; Grieve, David; Lefebure, David; Madu, Bruce; Northcote, Bruce; and Wojdak, Paul, 2008, British Columbia mining and mineral exploration overview 2007—British Columbia Ministry of Energy, Mines and Petroleum Resources, Information Circular 2008-1, 30 p. (Also available online at BC, 2009, MINFILE Mineral inventory: British Columbia Ministry of Energy, Mines and Petroleum Resources, MINFILE database, total records 12,523, accessed December 2009, at
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.
Schroeter, Tom; Cathro, Michael; Grieve, David; Lane, Robert; Pardy, Jamie; and Wojdak, Paul, 2006, British Columbia mining and mineral exploration overview 2005: British Columbia Ministry of Energy, Mines and Petroleum Resources Information Circular 2006-1, 20 p.
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.
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 Copper Corp., 2008: Western Copper Corp. Web page accessed 2008, at (Also available at