Iron Mask

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

Names and other identifiers

GMRAP ID 9769
Alternate names Erin Fr.
Tract name Intermontane Island-Arc Cu-Au (003pCu2002x)
Group name Afton-Ajax Group
Included sites Group includes Afton, Ajax JV, Big Onion, DM-Audra-Crescent, Galaxy, Iron Mask, and Rainbow deposits and Ace, Admiral Dewy, Crescent, Fargo, Kimberly, and Python prospects.
Site status deposit

Geographic location

Country Canada
State or province British Columbia
Geographic location -120.437515383, 50.654705987
Geologic map unit -120.437515383, 50.654705987
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 205Ma
Age determination method Inferred from U-Pb zircon age for Afton
Age range 205 Ma
Age reference unknown
Minerals azurite, bornite, chalcopyrite, cuprite, malachite, pyrite
Associated rocks diorite, monzonite, picrite, breccia
Tectonic setting island arc
Stratigraphic age Late Triassic

Commodity and development information

Development status Past Producer
Major commodities Cu, Au, Ag
Tonnage (Mt) 2Mt
Cu grade (%) 0.84%
Au grade (g/t) 0.4g/t
Contained copper 20,000t
Gold-Moly ratio -9999

Reference information

Comments 1904–1928, production.
Study area name British Columbia and Yukon Territory
References MINFILE BC (2009)
Site reference Mihalasky and others (2011, revised 2013)