Regionally the area is underlain by Upper Triassic Nicola Group andesite, porphyritic andesite, basalt, breccias and limestone. Granitic rocks of the Juro-Cretaceous Coast Plutonic Complex are found to the east of the occurrence area.

A pit on the Win showing exposes fractured and faulted silicified limestone with considerable epidote alteration and malachite and azurite staining. Generally, the mineralization within the pit consists of fracture-controlled chalcopyrite, pyrite, hematite, sphalerite, tetrahedrite and minor bornite. A grab sample from a trench assayed 1.04 per cent copper and 19.88 grams per tonne silver (Sookochoff, L.).