Mount Polley

Porphyry copper (Cu-Au) deposit in British Columbia, Canada

Names and other identifiers

GMRAP ID 9838
Alternate names Cariboo-Bell, Mt. Polley
Tract name Intermontane Island-Arc Cu-Au (003pCu2002x)
Group name Polley Group
Included sites Bell pit, Boundary zone, Cariboo pit, Northeast Zone, Pond zone, Southeast zone, Springer pit, Wight pit, Wishbone; Group includes Lloyd-Nordik and Mount Polley deposits.
Site status deposit

Geographic location

Country Canada
State or province British Columbia
Geographic location -121.641716191, 52.554405924
Geologic map unit -121.641716191, 52.554405924
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 202Ma
Age determination method U-Pb zircon
Age range 202 Ma
Age reference unknown
Minerals bornite, chalcopyrite, magnetite, pyrite
Associated rocks monzonite, diorite, plagioclase porphyry, foidal syenite (post-ore)
Tectonic setting island arc
Stratigraphic age Late Triassic

Commodity and development information

Development status Prospect
Major commodities Cu, Au, Ag
Tonnage (Mt) 205Mt
Cu grade (%) 0.324%
Au grade (g/t) 0.3098g/t
Contained copper 664,000t
Gold-Moly ratio -9999

Reference information

Comments 1990, resource estimated, open below Bell, Springer zones.
Study area name British Columbia and Yukon Territory
References MINFILE BC (2009); Sutherland Brown (1976); Schroeter (1995); Schroeter and others (2006); Schroeter and others (2007); Sinclair (2007); DeGrace and others (2009); Singer and others (2008); James Logan (written commun., 2008); Imperial Metals Corp. (2008)
Site reference Mihalasky and others (2011, revised 2013)
DeGrace, John; Fredericks, Jay; Grieve, David; Lefebure, David; Madu, Bruce; Northcote, Bruce; and Wojdak, Paul, 2009, British Columbia mining and mineral exploration overview 2008—British Columbia Ministry of Energy, Mines and Petroleum Resources, Information Circular 2009-1, 31 p.
Imperial Metals Corp., 2008: Imperial Metals Corp. Web page accessed 2008, at http://www.imperialmetals.com/.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 http://minfile.gov.bc.ca/.
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.
Schroeter, Tom; Grieve, David; Lane, Robert; Madu, Bruce; Northcote, Bruce; and Wojdak, Paul, 2007, British Columbia mining and mineral exploration overview 2006: British Columbia Ministry of Energy, Mines and Petroleum Resources Information Circular 2007-1, 28 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 http://pubs.usgs.gov/of/2008/1155/.
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.