The Capoose Porphyry occurrence is located on a southeast-facing slope, approximately 800 metres north of the northeast end of Capoose Lake.
The region in which the Capoose showing occurs is within the Intermontane Belt, underlain dominantly by Lower to Middle Jurassic volcanic and sedimentary rocks of the Hazelton Group. These assemblages are overlain by the Upper Cretaceous to Lower Tertiary Ootsa Lake Group and Miocene plateau basalt. Intruding Lower Jurassic rocks of the Hazelton Group in the northeastern part of the map sheet is a belt of granodiorite, diorite, and quartz diorite plutons of the Lower Jurassic Topley intrusive suite. Felsic plutons of probable Cretaceous age intrude both Lower and Middle Jurassic Hazelton strata.
This showing, and the adjacent Cap showing (093F 021), are underlain by granitic rocks of the Capoose Batholith of probable Cretaceous age. Sulphide mineralization comprises chalcopyrite, molybdenite, covellite and pyrite along with malachite, along fracture planes cutting granodiorite and quartz monzonite. Chalcopyrite and malachite have also been reported as occurring as disseminations in porphyritic quartz monzonite. Minor amounts of argillic alteration occur in the intrusive rocks. The best assays reported are 0.56 per cent copper and 0.007 per cent MoS2 from a grab sample taken from 1 of 14 blast pits on the property (Fieldwork 1992, p. 66).
Work History
In 1970, Rio Tinto Canadian Exploration Ltd. completed a soil sampling program, geological mapping, a 20.8 line-kilometre ground magnetic survey and a 46.8 line-kilometres induced polarization survey on the area as the Cap claim group. The following year, an induced polarization survey was completed on the Cap and T claim groups.
1983, BP Minerals Ltd. completed a program geological mapping and geochemical (rock, silt, and soil) sampling on the area immediately north of the occurrence as the Swan 1-4 claims.
During 1992 through 1994, Bull Pine Explorations Ltd. completed programs prospecting, geological mapping and geochemical (rock and soil) sampling on the area immediately north of the occurrence as the Swan 1 claim.
