The area is underlain by granite to diorite intrusions related to the Cretaceous to Tertiary Coast Plutonic Complex.
An east trending, north dipping shear zone in diorite contains a 0.5 metre wide quartz vein mineralized with bornite and possibly free gold. A sample assayed 2.0 grams per tonne gold, 54.9 grams per tonne silver and 0.3 per cent copper (Minister of Mines Annual Report 1914).