The property is underlain by north east trending metavolcanics of the Cambrian to Ordovician part of the Eagle Bay Formation. The metavolcanics consist of bedded andesitic fragmentals and flows, siliceous tuffites with some rhyolite ignimbrites, tuffs, and frag- mentals. The andesite and tuffite contain abundant siliceous and/or cherty layers. Small amounts of pyrite, pyrrhotite, chalcopyrite and sphalerite are disseminated in the rocks. Northeast-north trending quartz feldspar porphyry dykes cut the metavolcanics.

Numerous zones of massive galena, sphalerite, pyrrhotite, pyrite and magnetite with minor chalcopyrite occur in conformable chlorite and/or epidote rich layers. Layers of massive sulphides are 4 metres or more.

The zinc zone covers an area measuring about 1600 by 600 metres in an east northeast trend with 20 to 35 degree dips to the north- west. This zone lies about 1 kilometre southeast of the BC zone (082M 139).

A drillhole intersected 1.53 per cent lead, 1.09 per cent zinc and 10.9 grams per tonne silver over 1.13 metres (Assessment Report 14681). Indicated reserves are 148,000 tonnes grading 49.7 grams per tonne silver, 0.25 per cent cadmium, 0.19 per cent copper, 0.14 per cent molybdenum, 0.53 per cent lead and 2.43 per cent zinc (Property File - Black, 1976; Assessment Report 13381, page 17).