The Pinnacle (Cathedral) occurrence is located about 13 kilometres west of Uslika Lake and approximately 58 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 Pinnacle showing consists of a 60-metre-wide zone of parallel faults within quartz monzonite of the Hogem Plutonic Suite. Seven faults are identified and strike between 150 to 170 degrees and dip 50 to 60 degrees to the west. The faults host quartz veining with chlorite and minor carbonate and are variously mineralized with pyrite, arsenopyrite and chalcopyrite.
To date (2013), rock samples collected from the two westernmost and two easternmost faults have yielded the most significant gold results, though anomalous arsenic and gold have been encountered in the other structures as well. Significant gold values in samples invariably have anomalous arsenic values, although the converse does not necessarily hold. Rock sample #1926 was collected from the western most fault hosting a quartz-sulphide vein, 2.5-3 centimetres thick, containing a semi massive pyrite chain of grains and aggregates with lesser disseminated arsenopyrite. The sample assayed 3.60 grams per tonne gold, 0.1 per cent copper and 2.8 grams per tonne silver (Assessment Report 34793).
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 (094C 050), 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 (1255) from the Pinnacle occurrence area yielded 13.0 grams per tonne gold (Vanderwart Consulting Inc. (2021-07-12): Technical Report on the Thane Copper-Gold Project, Omineca Mining Division, British Columbia, Canada).
