The area is underlain by argillite, greywacke, and conglomerate of the Jurassic to Cretaceous Bowser Lake Group. Narrow quartz veins lie conformably below a 35 to 75 metre wide conglomerate bed which strikes northeast and dips 50 to 75 degrees southeast. The veins are mineralized with galena, sphalerite, pyrite, and pyrrhotite, and minor chalcopyrite.

The Gold Cap veins consist of a 90 metre continuation of the Bear vein (103I 029), to the west and a 30 metre long vein, 120 metres to the east. The vein to the west is 5 to 15 centimetres wide and strikes 030 degrees with a 15 degree south east dip. It follows a narrow seam of soft, black, carbonaceous shale, overlain by greywacke. A 0.82 kilogram sample assayed 2.06 grams per tonne gold and 18.5 grams per tonne silver (Geological Survey of Canada Memoir 205).