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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  31-Mar-2009 by Gloria Robinson (GLR)

Summary Help Help

NMI 093B8 Cu1
BCGS Map 093B049
Status Showing NTS Map 093B08W
Latitude 052º 27' 51'' UTM 10 (NAD 83)
Longitude 122º 15' 30'' Northing 5812925
Easting 550387
Commodities Copper, Iron, Magnetite, Molybdenum Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
K01 : Cu skarn
Tectonic Belt Intermontane Terrane Cache Creek, Stikine
Capsule Geology

The Iron Mountain showing is located near the eastern margin of the Stikinia Terrane 31 kilometres south of Quesnel in south central British Columbia. The dominant rock types in the region are meta- basalt, limestone and argillaceous metasediments of the Mississippian to Triassic Cache Creek Group. These are intruded by the dioritic to quartz dioritic Granite Mountain Pluton and the (?)Cretaceous Sheri- dan Creek Pluton. Jurassic sedimentary rocks overlap both the Cache Creek and Quesnellia terranes to the north and east of the plutons. Older rocks are largely obscured by plateau basalt of probable Miocene age to the west.

The Granite Mountain Pluton has been affected by regional metamorphism (greenschist facies) and deformation along with the enclosing Cache Creek Group. The Cache Creek Group and the margins of the Granite Mountain Pluton record effects of ductile deformation. The main body of the pluton has been cataclastically deformed.

The Iron Mountain showing is underlain by thin bedded metamorphosed basaltic tuffs and related rocks ("greenschist") , volcanic breccia and marble of the Cache Creek Group and, in the north, granite. Mineralization consists of magnetite, specular hematite and chalcopyrite with garnet, pyroxene and epidote as contact metasomatic lensoid deposits within marble and schist. The lenses range in size from a few centimetres in width up 1.2 metres and up to 60 metres long and have been traced over a distance of over 1.5 kilometres. The lenses are conformable with the foliation of the enclosing rocks. Chalcopyrite and pyrite occur disseminated through- out the schists and along shears in the intrusive rocks. Pyrite, chalcopyrite and molybdenite are also present in quartz veins.

EM EXPL 1998-A1-A15
EM OF 1999-7
EMR AR 1925-A156; 1956-33; 1957-16; 1966-120; 1967-121
EMPR ASS RPT 1873, 2305, 2382, 3746, 10585
EMPR EXPL 1982-277
EMPR GEM 1969-368; 1972-335
EMPR PF (Crosby, J.K., (1956): *Report on the Iron Mountain Area
near McLeese Lake; Geology Map (sketch), 1969; Philp, R.H.D.,
(1970): Report on the Brenda, Mayday, Maybe, Ted and Tell Groups,
Ensbrook Mines Limited, Prospectus; Geochemical Survey Report on
At and It claims, Philp, R.H.D., 1970; 93B General File - Property
Map of the McLeese Lake Area, 1970; Ensbrook Mines Ltd.
Prospectus, 1970)
EMPR PF Cyprus Anvil (Cominco Ltd. (1967): Claims, Geology and Drill Holes Plan Map - Gibraltar)
EMR MP CORPFILE (The Cariboo Gold Quartz Mining Company, Limited;
Earlcrest Resources Ltd.; Ballinderry Explorations Ltd.; Falcon
Explorations Limited)
GSC MAP 12-1959; 1424A; 1537G