The area is underlain by the Lower Cambrian Eagle Bay Formation consisting of siliceous and graphitic phyllites, phyllitic limestones and greenschist. The metavolcanics and metasediments 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.

A mineralized gossan, 100 by 10 metres, occurs within silicified tuffs and phyllites along a north 060 degree trend. Mineralization consists of pyrite, pyrrhotite, sphalerite, galena, and minor chalcopyrite. A 2.1 metre wide sample gave 2.99 per cent lead, 5.54 per cent zinc, 0.09 per cent copper, 38.4 grams per tonne silver and 1.8 grams per tonne gold.