The Gopher showing is hosted by the augite porphyry (diorite) of the Rossland sill. The sill itself has intruded volcanic conglomer- ate, breccia, and sandstone of the Elise Formation, Rossland Group. The contact of the sill is poorly defined but appears concordant. The Rossland Group rocks are intruded by the Lower Jurassic Rossland monzonite which is comprised of a biotite-hornblende-augite monzonite stock. The showing lies within the zone of thermal metamorphism associated with the monzonite intrusive.

The mineralized vein lies east of the main fault on the Home- stake claim (082FSW123) and, in part, is a continuation of the east Homestake vein system. Mineralization consists of pyrrhotite, pyrite, chalcopyrite, sphalerite and minor arsenopyrite in quartz- calcite gangue. Equidimensional pyrite grains occur as islands in the pyrrhotite. Native bismuth and associated bismuthinite were also reported to occur in the ore. Chip samples taken across 1 metre at the Gopher adit assayed from 8.37 to 10.35 grams per tonne gold and 12.34 to 30.17 grams per tonne silver (Assessment Report 16751).