The North Lake showing is underlain by Middle to Upper Jurassic Hazelton Group, Ashman Formation rocks. The Ashman Formation is mainly a sedimentary sequence comprised of marine black shale, argillite, greywacke and siltstone with some intercalated tuff and breccia (Fieldwork 1988, Figure 1-23-2).

Alteration has affected mainly the feldspar and ferromagnesium minerals producing mica, clay minerals, chlorite, limonite, carbonates and less commonly, epidote.

The Hazelton rocks are intruded by dikes and small stocks which strike north-northwesterly and dip west-southwest. These include feldspar porphyry dikes and aphanitic basic dikes.

Mineralization at the North Lake showing consists of lenticular quartz-chalcopyrite-pyrite veinlets which occur within a brecciated shear zone along the west shore of North Lake. Open cuts expose a 0.45 metre wide shear zone which strikes about 060 degrees and dips 70 degrees to the northwest.

In 1985, a 1.0 metre wide chip sample from a trench assayed 1.71 grams per tonne gold, 40.11 grams per tonne silver, 1.59 per cent copper, 0.32 per cent zinc and 0.01 per cent lead. Another 0.45 metre wide sample assayed trace gold, 122.74 grams per tonne silver, 4.3 per cent copper, 2.7 per cent zinc and 0.1 per cent lead (Assessment Report 14256).

The 2007, Bard Ventures Ltd conducted IP work over the Copper Crown, Rainstorm, Eureka and in the vicinity of the North Lake zones.

Refer to Copper Crown (093L 026) for further information on work conducted on the Grouse Mountain property which included the North Lake showing.