The Lake Area (Cathedral) occurrence is located about 12 kilometres northwest of Tenakihi Lakes and approximately 77 kilometres northwest of the community of Germansen Landing.

The area is underlain by the Early Jurassic Hogem Plutonic Suite which consists of numerous intrusive bodies of distinct age. This complex varies in composition between gabbro, diorite, monzonite, syenite and alkali feldspar syenite. The contact with volcanic rocks of the Upper Triassic Takla Group lies 1 kilometre to the north of the showing.

The main lithologies at the Lake Area showing are diorite to quartz monzonite intrusive rocks. Several quartz veins, pegmatites and aplite dikes were also noted. In 2013, rock sample #1989 assayed 0.70 per cent copper from a dark green, chloritic, hornblende porphyritic volcanic, tentatively identified as basalt of the Upper Triassic Takla Group (Assessment Report 34793). Disseminated chalcopyrite and a surface coating of malachite were observed.

Work History

In 2009-10, C.O. Naas examined the provincial Regional Geochemical Survey data and British Columbia MINFILE which led to the staking of the Thane Creek property tenures. A comprehensive compilation of historical exploration work was undertaken and identified four areas that indicated excellent potential for copper-gold mineralization. In 2010, a property visit was carried out and explored three of the target areas identified by the compilation program. Exploration consisted of geochemical sampling with collection of 10 silt samples and 69 rock samples. In 2012, Thane Minerals Inc. carried out exploration at multiple areas on the Cathedral property including the Tenakihi (094C 071), Link (094C 123), Osilinka, Cathedral (094C 109, 181), Gail (094C 072, 133), Cirque (093N 093), and Lake (094C 188) zones. Exploration consisted of silt sampling, soil and talus fine sampling (contour and gridded), rock sampling, and geological mapping. A total of 36 silt samples, 785 soil and talus fine samples, and 749 rock samples were collected. Approximately 1525 hectares were geologically mapped at 1:10,000 scale. Analyses of soil and talus fine samples and selected rock and silt samples have been carried out by x-ray fluorescence (XRF).

In 2020, Interra Copper Corp. completed a program of geological mapping, geochemical (rock, soil and stream sediment) sampling and a 14.0 line-kilometre induced polarization survey on the area as the Thane property. A rock sample (35927) from the Lake zone yielded 1.00 per cent copper (Vanderwart Consulting Inc. [2021-07-12]: Technical Report on the Thane Copper-Gold Project, Omineca Mining Division, British Columbia, Canada).