The Punch Bowl West showing is situated on a north-south trending ridge, approximately 500 metres south west of Punch Bowl Lake and 40 kilometres southwest of Princeton.
The area is comprised of a thick section of sandstone, with lesser siltstone, tuffaceous argillite and lapilli tuff of the Early to Middle Jurassic Dewdney Creek Formation (Ladner Group). The beds strike north and dip 60 to 70 degrees west.
Locally, a west-striking shear zone is exposed in a gully that cuts into the east flank of the ridge, southwest of the lake. Sandstone, siltstone and argillite horizons are intermittently altered and mineralized with disseminated sulphides over a vertical distance of up to 60 metres. The beds are partly altered and replaced with silica, mariposite and siderite, suggesting an epithermal origin (Assessment Report 15146). Mineralization consists of abundant arsenopyrite, with minor sphalerite, pyrite, galena and chalcopyrite.
In 1984, six grab samples assayed 0.080 to 0.300 gram per tonne gold and 0.8 to 6.0 grams per tonne silver (Assessment Report 14693, page 8).
A 3.0-metre chip sample taken across sheared sandstone returned 0.112 per cent zinc, greater than 0.100 per cent arsenic, 28.0 grams per tonne silver and 0.180 gram per tonne gold (Property File - D.G. Cardinal, 1987, pages 12, 13).
In 1988, a rock chip sample of brecciated sandstone and conglomerate containing patchy pyrite and irregular silicification yielded up to 0.300 gram per tonne gold (Assessment Report 17824).
The area was originally prospected in the 1930’s and 1940’s and some placer gold was noted in Punch Bowl Creek. During 1984 through 1987, Kam Creek Mines completed programs of prospecting, rock and soil sampling and geological mapping on the area as the Punch Bowl and K.C.M. claims. In 1988, Locke Rich Minerals completed a program of rock and soil sampling, geological mapping and minor trenching on the area.