Jurassic volcanic and sedimentary strata are cut by several northwest striking faults. At some localities carbonate quartz veins up to 5.6 metres wide occupy the structures. In other areas mafic volcanic units are pervasively iron carbonate-mariposite altered and siltstones are silicified along the northwest structures. Near the centre of the HC 2 claim porphyry-type copper mineralization in volcanic units have been cut by an iron carbonate altered structure. Precious metal (gold and silver) values are closely associated with quartz stringers and veining.