The area is underlain by argillite and limestone of the Jurassic to Triassic Kunga Group in contact with the monzonitic intrusives of the Middle to Late Jurassic Burnaby Island Plutonic Suite.
Copper, molybdenum and nickel showings occur in skarn and hornfelsed argillite near the contact with quartz monzonite. The mineralization consists of disseminated chalcopyrite, pyrrhotite, pyrite and minor molybdenite.