The area is underlain by the Lower Cambrian part of the Eagle Bay Formation consisting of siliceous and graphitic phyllites, phyllitic limestones and greenschist. The metavolcanics and meta- sediments generally strike northeast and dip 10 to 40 degrees northwest. The rocks are cut by Late Cretaceous or Early Tertiary quartz-feldspar porphyry and mafic dykes with northerly trends.

Massive pyrite with chalcopyrite occurs within dark green uniform chlorite schist having a 170 degree strike and 15 degree westerly dip. The zone is 0.5 metres thick and assayed 0.89 per cent copper, 0.03 per cent lead, 0.12 per cent zinc and 8.9 grams per tonne silver.