The Black Bear showing is located on the west side of Granby Bay on Observatory Inlet, just southeast of the Bonanza mine (103P 023).

The showing is hosted in a 14.4 by 9.6 kilometre roof pendant within the Eocene Coast Plutonic Complex. The roof pendant, consisting of volcanic and sedimentary rocks, has been correlated with the Middle-Upper Jurassic Hazelton Group and the Middle Jurassic Bowser Lake Group. The volcanics consist of variably chloritized pillow and massive basalt with minor mafic tuffs. The overlying sediments consist of argillite, siltstone and sandstone with minor chert and limestone. There are two observable phases of folding in the area, an initial north-northeast trending phase followed by a later east-northeast trending phase.

A 200 metre wide stockwork of irregular lenticular masses, veins and stringers of quartz in hornblende prophyritic basalt contains minor chalcopyrite. The stockwork has a general strike of 038 degrees. Two hundred metres west of the stockwork, at an elevation of 400 metres, a quartz vein strikes 008 degrees and dips steeply to the west. A felsite dike lies in close proximity to the east wall of the vein. The vein can be traced for 152 metres and is 3 to 4 metres wide. A 2.5 centimetre wide, 0.6 metre long stringer of molybdenite occurs on the hangingwall.