The CA showing is located within the Intermontane Belt underlain by volcanic rocks of the Jurassic Hazelton Group and Tertiary vol- canics of the Ootsa Lake and Endako Groups, overlain by Miocene plateau basalt. Intruding the Mesozoic volcanic and related sedi- mentary rocks of the Hazelton Group are small complexes of foliated granodiorite and diorite, often showing complex mixed relationships with intrusive and supracrustal rocks. Younger undeformed quartz porphyry dikes, possibly related to the overlying Ootsa Lake Group cut these older rocks.

The CA showing is underlain by medium grained diorite which is intensely fractured. These rocks are pervasively chloritized with local intense epidote and silica alteration. Mineralization consists of chalcopyrite and pyrite with malachite along fractures within the diorite.