The GC occurrence is located on the northern slopes of Mount Porter, approximately 4 kilometres north east of Doran Lake.

The area is primarily underlain by Upper Triassic Karmutsen Formation (Vancouver Group) massive basalt, pillow basalt, pillow basalt breccia, lapilli tuff, a volcanic sediment unit and an occasional feldspar porphyry dike.

Mineralization consists of disseminated and locally massive pyrite and chalcopyrite and trace galena in a quartz-carbonate stockwork within a highly fractured and altered basalt. Quartz-carbonate stockworks are also evident in basalt breccia and are mineralized with pyrite and trace chalcopyrite. A rock sample from rubble at the base of a cliff (Box Canyon showing) assayed 0.32 per cent copper and 18.2 grams per tonne gold (Assessment Report 15354).

In 1986, the area was prospected by R.J. Bilquist as the GC 1-2 claims.