The Hudson Bay Mountain area is underlain mainly by volcanic rocks of the Lower Jurassic Hazelton Group, Telkwa Formation. Pyro- clastic rocks, particularly lapilli tuff, of intermediate composition are the most abundant. Three main groups of felsic intrusions have been recognized in the district. These include felsites, grano- diorites and Tertiary porphyries. Mineralization in the area seems to be genetically related to the Tertiary porphyry intrusions.

Mineralization on the Torrent claim occurs in a shear zone about 2.0 metres in width. The zone is within brecciated andesite and strikes northeast with a near vertical dip. Mineralization consists mainly of sphalerite, arsenopyrite, pyrite and lesser amounts of galena and chalcopyrite. A sample from a 1.2 metre width of mineralization assayed 5.83 grams per tonne gold, 92.57 grams per tonne silver and 3.8 per cent zinc (Batten, 1928).