The Rose and Belle occurrence area is underlain by chloritic amygdaloidal basalt of the Upper Triassic Karmutsen Formation (Vancouver Group), locally cut by a quartz-carbonate (ankerite) shear zone. A steeply dipping quartz diorite dyke intercepts this zone.

Mineralization within the quartz-carbonate zone comprises magnetite, pyrite, chalcopyrite, arsenopyrite and hematite. Minor gangue minerals are garnet, diopside and epidote. A rock sample from the zone assayed up to 0.59 grams per tonne gold (Assessment Report 17995).