The claims are underlain by Lower Jurassic Hazelton Group volcanics in the Telkwa Formation comprised of andesitic to dacitic flows, rhyolite, basalt flow, tuff and breccia. The volcanics have been intruded by tongues and dikes of porphyritic granodiorite and related granitic rocks ranging from Late Cretaceous to Eocene in age.

Mineralization consists of numerous pyritic zones in the volcanics which host low values in gold, silver, and copper. A selected sample in 1972 assayed 3.25 per cent copper (Assessment Report 3583).

Associated with the pyritic zones are felsite dikes which are fractured and mineralized with chalcocite, bornite, and secondary malachite. Also associated with the mineralization in the volcanics are veinlets and blebs of epidote, hematite, and quartz.