The Owl Lake showing is located on the northeastern side of Owl Lake approximately twelve kilometres north of Pemberton.

The showing occurs within the Upper Triassic Cadwallader Group preserved as a roof pendant within plutonic rocks of the Jurassic to Cretaceous Coast Crystalline Complex. The western boundary of the Cadwallader Group is marked by the Owl Creek fault, a major northwest trending fault that has been intruded by five small plugs of diorite, quartz diorite and granodiorite composition, over 8 kilometres strike length. Rocks to the west of the fault are those of the Lower Cretaceous Fire Lake Group. To the east, the Cretaceous Scuzzy pluton is composed of diorite, quartz diorite and tonalite.

The Cadwallader Group in the vicinity of the showing consists of andesitic tuff, breccia and high level porphyritic intrusions cut by minor basaltic dikes. The andesite has been pyritized and irregularly silicified, sericitized and chloritized. To the east of the Owl Creek fault are two subparallel faults which intersect a northeast striking shear zone. At this intersection the rocks contain up to 30 per cent pyrite along with minor chalcopyrite and molybdenite in fractures and quartz veinlets.

The results of a soil geochemical survey in 1992 yielded numerous anomalous copper (53 to 188 parts per million), molybdenum (4 to 62 parts per million), zinc (110 to 173 parts per million) and arsenic (15 to 152 parts per million) values, most associated with a northern magnetic low and proximal to the intersection of two magnetic linears interpreted to be faults (Assessment Report 22889). In 1993, 13.4 line kilometres of induced polarization and resistivity surveys were conducted at the J showing. Two localized resistivity highs were detected but no chargeability anomalies indicative of disseminated sulphides were discovered.