The Swan 1 showing is located about 120 kilometres southwest of Vanderhoof.
The region in which the showing occurs is underlain dominantly by Lower to Middle Jurassic volcanic and sedimentary rocks of the Hazelton Group. These assemblages are overlain by the Upper Cretaceous to Oligocene 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 uncertain age intrude both Lower and Middle Jurassic Hazelton strata.
The area of the showing is underlain by volcanic and sedimentary rocks of the Hazelton Group. These comprise rhyolite, andesite, and argillite. Biotite quartz diorite and quartz monzonite of the Jurassic-Cretaceous(?) Capoose batholith occur to the south. Mineralization consists of 2 to 3 per cent pyrrhotite and trace chalcopyrite in altered (chlorite, clay, goethite, and jarosite) quartz-eye rhyolite.
A grab sample across 2 metres assayed 0.75 gram per tonne gold, 114.2 grams per tonne silver and 1.78 per cent copper (Assessment Report 22522).
Work History
Stream and lake sediment surveys were conducted in this area in the 1960s by Rio Tinto.
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 of 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 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 as the Swan 1 claim.