The Copper Crown South West occurrence is located on Grouse Mountain, southwest of Coppermine Lake.

Regionally, the area is underlain by a sequence of north west striking andesite flows and pyroclastics, with lesser rhyolite and basalts of the Lower Jurassic Telkwa Formation (Hazelton Group) and a north-northwest trending sedimentary sequence comprised of marine black shale, argillite, siltstone and greywacke with intercalated tuffs and breccia of the Upper Jurassic Ashman Formation (Bowser Lake Group). The volcanic and sedimentary rocks are intruded by dikes and small stocks which strike north-northwest and dip west-southwest. These include feldspar porphyry, biotite feldspar porphyry, monzodioritic to gabbroic intrusives and aphanitic basic dikes of the Late Cretaceous Bulkley Plutonic Suite and Eocene Goosly Plutonic Suite. Alteration has affected mainly the feldspar and ferromagnesium minerals producing mica and clay minerals, chlorite, limonite, carbonates, and less commonly epidote.

Locally, a shear zone hosts a less than 1 metre wide mineralized quartz vein associated with a northwest-southeast trending monzodiorite dike. The vein/shear zone trends 203 degrees with a dip of 68 degrees to the southeast. The mineralization was not described but is likely similar to that of the nearby by Copper Crown (MINFILE 093L 026) occurrence and comprise variable amounts of sphalerite, chalcopyrite, galena and pyrite.

In 2010, a grab sample (18651) was collected from an old blast trench yielding 1.0 per cent copper, 17.75 per cent zinc and 110.5 grams per tonne silver (Assessment Report 32238).

The area has been explored in conjunction with the nearby Copper Crown (MINFILE 093L 026) occurrence and full exploration history can be found there.