The area is underlain by northwest trending Devonian to Upper Triassic metasediments which are intruded by Late Paleozoic and/or Mesozoic gabbro sills. Oligocene Tkope River Intrusives occur to the south. Two southeast-trending belts of magnetite and pyrrhotite vein and replacement mineralization occur in the metasediments which consist mainly of argillite and calcareous argillite. One occurrence, south of Chuck Creek and west of two small ponds, is up to 3 metres wide and reported to contain galena and sphalerite. Additional pods of massive magnetite and pyrrhotite are located at the 1200 metre elevation in the creek NW of the main showing, and at several locations to the north northeast for approximately 1 kilometre to the same elevation north of Chuck Creek. These pods may represent mainto-type deposits.