The Commodore occurrence area is underlain by massive recrystal- lized limestone of the Quatsino Formation in fault contact with por- phyritic and amygdaloidal basalt of the Karmutsen Formation, both of the Upper Triassic Vancouver Group. This sequence is intruded by hornblende porphyry, feldspar porphyry, diorite dykes and a more massive diorite at depth.

The fault zone contact between limestone and basalt contains quartz veins mineralized with pyrite, chalcopyrite and galena carrying values in silver, zinc and gold. Three quartz veins were exploited on the property. Mineralization tends to be more concen- trated where veins crosscut dykes. The veins also extend into the limestone with minor disseminated galena evident in the limestone.

Past work included an inclined shaft, drifting and a crosscut.