The area is underlain by granodiorite and older quartz diorite of the Jurassic to Tertiary Coast Plutonic Complex. A 100 metre wide band of limestone trending 60 degrees and dipping 80 degrees, poss- ibly of the Upper Triassic Karmutsen Formation (Vancouver Group), lies in the granodiorite. A 4 to 6 metre wide, 75 metre long skarn zone occurs along the sediment-intrusive contact.

Copper mineralization occurs in both the skarn and intrusive rock. Pyrite, chalcopyrite and occasionally native copper occur as irregular streaks and blebs in the skarn. In the intrusive, chalco- pyrite occurs as stockwork and disseminations. Gangue minerals in- clude epidote, calcite, hematite, magnetite and garnet. A 1.8 metre sample taken in 1975, assayed 2.44 per cent copper and 43.9 grams per tonne silver (Assessment Report 5444).

In 1940, an 86 tonne shipment contained 2890 grams of silver and 2343 kilograms of copper (Bulletin 39).