The mineralization occurs near a fault contact with Lower Jurassic Hazelton Group volcanics of the Telkwa Formation and the Lower Cretaceous Skeena Group sediments. Fractures cut across the volcanic host rocks and mineralization occurs along silicified joints and bedding planes in the tuffs of the Hazelton Group as well as in quartz veins. The veins host occurrences of galena, sphalerite, pyrite and pyrrhotite. The dark green, fine-grained andesites lie in fault contact with the younger sediments comprised of rusty weathering quartzite, greywacke, slate and conglomerate. The basal sedimentary unit is comprised of a number of coal seams striking northwards and dipping 45 to 60 degrees east.

The main quartz vein, at 900 metres elevation, hosts dark sphalerite and minor amounts of arsenopyrite, pyrite, pyrrhotite, galena, and chalcopyrite accompanied by minor quartz gangue. The vein strikes 010 degrees and dips between 50 to 60 degrees west. The fissuring extends to the fault contact of the volcanic and sedimentary rocks. Samples collected by D. Lay in 1937 near the bottom of the shaft assayed 2.05 grams per tonne gold and 20.57 grams per tonne silver. Another sample collected by D. Lay, a 45.7 centimetre channel sample across the face of the drift assayed 6.86 grams per tonne gold, 233 grams per tonne silver, 2 per cent lead, and 5.4 per cent zinc (Minister of Mines Annual Report 1937, page C20).

In an open cut near the shaft a sphalerite vein 5 metres in length and 13 centimetres wide was exposed. Southwest of this vein is another vein consisting of equal parts of quartz and pyrrhotite with a little chalcopyrite. A 20 centimetre channel sample across the vein assayed 12.34 grams per tonne gold, 0.54 per cent copper, and nickel nil (Minister of Mines Annual Report 1938).

In another open cut, further southeast of the shaft, a vein was exposed consisting of solid sphalerite with 5 to 10 per cent quartz gangue, minor galena, pyrrhotite, and chalcopyrite.

Production data between the years 1933 to 1939 totalled 165 tonnes mined with 9,236 grams gold, 36,919 grams silver, 2400 kilo- grams lead, and 6,053 kilograms zinc.