The Lem occurrence is located immediately east of an un-named lake (informally called Mystery [Deer] Lake), approximately 1.1 kilometres north-northeast of the northeast end of Roscoe Lake.

The area is located on the eastern flank of the multistage Upper Triassic to Lower Jurassic Guichon Creek Batholith. The Lem occurrence lies astride the northwest-trending contact between Bethlehem phase granodiorite to the northeast and Skeena variety (Bethsaida phase) to the southwest. The Skeena granodiorite is transitional in composition and texture between the two phases of the batholith. South of the small lake near the centre of the property, the Skeena rocks have been intruded by an aplitic quartz porphyry dike, which has been exposed several kilometres to the south along its strike.

Trenching (1970) has exposed mineralization in a north-trending zone approximately 400 metres long and 4.5 metres wide immediately east of the lake. Chalcopyrite with lesser bornite and minor azurite occur as disseminations and fracture-fillings in the granodiorite. Alteration mineralogy in this zone comprise limonite, chlorite, biotite, sericite and potassium feldspar.

In 2019, a float sample (P425405) of medium-grained biotite quartz diorite or granodiorite with fractures hosting malachite, located approximately 1 kilometre southeast of the occurrence, assayed 1.45 per cent copper and 10 grams per tonne silver (Assessment Report 38508).

Later work (1990s) identified the Mystery Lake zone on the CVS 13 claim in the approximate area of the Lem occurrence. The exact location of this zone is unknown. The zone comprises a widespread area of hydrothermal alteration with pervasive sericite and lesser potassium felspar occurring over a distance of at least 600 metres in both Bethlehem phase granodiorite and quartz aplite dikes. Malachite mineralization is reported along with local quartz-chalcocite-bornite veins.

In 1993, drilling yielded intercepts including 1.36 per cent copper and 11.8 grams per tonne silver over 3 metres and 0.266 per cent copper over 12 metres in hole 93CVS-11 (Property File 804381).

Work History

In 1970, Kelver Mines held the area as the Lem claims and completed a program of line-cutting and a 4.0 line-kilometre induced polarization survey. Maps indicate that at least 22 trenches had been completed on the area by this time.

In 1972, Stokes Exploration Management Co. Ltd. completed a 13.5 line-kilometre ground magnetic survey on the Lem claims.

Also during 1970 through 1974, Highmont Mining Corp. Ltd. completed programs of geological mapping, soil sampling and ground magnetic surveys on the area immediately south and east of the occurrence as the Pen, Price and Ruby claims.

During 1991 through 1994, Aucumo Resources and Hudson Bay Exploration completed programs of geological mapping, soil and stream sediment sampling and induced polarization surveys on the as the CVS property.

During 2018 through 2020, Mascot Capital Inc. completed programs of prospecting, geochemical (rock and soil) sampling, 3D compilations of historical magnetic data and an 8.0 line-kilometre seismic survey on the area as the Gnawed Mountain property.