The Rufus occurrence is located on a west- facing steep ridge or slope of Mount Rufus.
The area is underlain by sedimentary rocks of the Mississippian to Lower Permian Buttle Lake Group. These have been intruded by granodioritic rocks of the Jurassic Island Plutonic Suite to the west and by dioritic rocks of the Paleozoic to Jurassic Westcoast Crystalline Complex to the east.
Locally, a gossanous zone hosts massive pyrrhotite and pyrite with flecks and strings of chalcopyrite. A grab sample (49404) assayed 0.43 per cent copper, 0.01 per cent lead, 0.01 per cent zinc, 4.8 grams per tonne silver and 1.6 grams per tonne gold (John S. Vincent (1981-12-01): 1981 Report on WYN claims).
In 1981, Dynamic Oil Ltd. completed a program of geological mapping; rock, soil and silt sampling and airborne geophysical surveys on the area as Wyn claims.