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

A diamond drill hole intersected disseminated pyrrhotite, galena and sphalerite within limestone, argillite and tuff sequences. A sample in graphitic argillite assayed 0.22 per cent zinc, 0.22 per cent lead and 5.8 grams per tonne silver (Assessment Report 7693). A nearby surface showing consists of a 10 centimetre wide zone of sphalerite within calcareous argillite.