The Lin 20 showing is located north of Starvation Peak, at an elevation of approximately 2000 metres.
The area is underlain by undivided sedimentary rocks and dolomitic carbonate rocks of the middle Proterozoic Creston, Kitchener and Grinnell formations (Purcell Supergroup), though recent geological compilations for the area do not use of the Grinnell nomenclature. Falconbridge's 1970 work revealed a 100-metre northwest-trending zone of copper mineralization adjacent and related to a northeast trending andesitic (diorite) sill or dike (Map 2, Assessment Report 2703). The report does not describe the type of copper mineralization.
In general, throughout this region, stratabound covellite, bornite and chalcocite mineralization, consisting of fine disseminations and blebs (1 to 3 millimetres), are confined to quartzite beds, previously identified as belonging to the Helikian Upper Grinnell Formation. The best mineralized beds are traceable laterally for a couple of thousand metres with interruptions, and may reach up to 10 per cent sulphides over several centimetres. Malachite is widespread at surface and to a depth of approximately 1 metre. The thickness of the mineralized horizons rarely exceeds 1 metre.
Where there is enrichment of copper sulphides, radiometric surveys indicate anomalous radioactivity probably from uranium or thorium(?) enrichment. Radiometric prospecting indicates anomalous readings in the range of 200 to 400 counts per second coincidental with areas of stronger sulphide enrichment. Background is approximately 50 counts per second on a BGS-1S Scintrex scintillometer. Trace amounts of molybdenum are also reported to be associated.
Samples from the Lin 20 to 22 (082GSE008) claims are reported to have yielded up to 0.3 per cent copper and 14 grams per tonne silver (Property File - unknown [unknown]: Geological Sketch Map of Clark Range and locations of principal stratabound mineral occurrences - SE BC).
The Lin claims were staked in late 1969 by the Goble family (Kintla Exploration Limited) and optioned to Falconbridge Nickel Mines Limited. The claims were located from Kishinena Creek south to Starvation Peak. In 1970, Falconbridge completed a program of geological mapping on the area as the Lin claims (Assessment Report 2703). In 1974 or 1975, four short diamond drill holes, totalling 95.4 metres, were completed on the Lin 21 claim (082GSE049) (Assessment Report 5694) and 3 holes were drilled on the Opal claims (082GSE046) (Assessment Report 5696). In 1975, Aquitaine Co. of Canada Ltd. completed a program of regional geochemical sampling, geological mapping and prospecting in the area. In 1975, the Goble family (Kintla) reported that they discovered uranium in the red beds of the Grinnell Formation, and in some of the copper bearing beds of the Grinnell Formation. In 1976 a preliminary, radiometric survey was conducted on the Lin Claims (Assessment Report 6521). In 1978/79 a more detailed examination was undertaken and radiometric work was also carried out on the Opal claims (082GSE046) between Starvation Creek and the Montana border (Assessment Report 7678). Kintla reported that “copper-silver-molybdenum beds” were located in 1979.
