The Federal occurrence is fault-hosted within schistose sediments of the Helikian Kitchener Formation (Purcell Supergroup). The surface showing apparently consists of massive pyrite and pyrrhotite and native copper contained within a shoot or chimney of soft talcose material (chlorite?) with limonite staining. The native copper occurs as thin layers and groups of arborescent crystals within the soft matrix of the fault zone. A sample across one metre assayed 11 per cent copper. The old workings are apparently located on the south side of the creek while the fault is exposed on both north and south slopes.