The Lake Shore showing is located 15 kilometres northeast of Stewart, about 3.5 kilometres east-northeast of the confluence of Bitter Creek and the Bear River, on the west side of Ore Mountain.
The area is underlain by north to north-northeast striking, steeply dipping argillites and slates of the Middle Jurassic Salmon River Formation (Hazelton Group) (Bulletin 63). The showing lies close to the unconformable contact of these rocks with the underlying volcanics of the Lower Jurassic Unuk River Formation (Hazelton Group). The rocks are cut by several north to northwest trending narrow felsic dikes that belong to the Portland Canal dike swarm. A prominent north to northeast trending fault lies immediately east of the showing. The dikes and mineralization appear to terminate against this fault (Assessment Report 13352).
Most of the mineralization occurs in the sediments, close to the contacts with a series of felsic dikes. Some mineralization occurs in the dikes themselves as fracture fillings and along joints. Mineralization comprises predominantly pyrite and pyrrhotite with lesser arsenopyrite, sphalerite, galena and chalcopyrite in a siliceous gangue. The sulphides form discontinuous, north trending and west dipping gash veins and pods up to 3 metres across; widths are typically less than 0.5 metre. The discrete mineral accumulations extend over a north to northeast length of about 150 metres, approximately parallel to the fault. The individual gash veins and pods, especially those hosted in dikes, tend to trend slightly oblique to the fault.
A chip(?) sample was collected in 1984 from the adit, 4.95 metres from the portal, near the south end of the exposed mineralization. The sample assayed 3.4 grams per tonne gold, 139.5 grams per tonne silver, 0.19 per cent copper, 1.0 per cent lead and 0.62 per cent zinc across a width of 27 centimetres (Assessment Report 13352).
In 1979, a grab sample collected from a new discovery, approximately 210 metres south-southeast of the adit, assayed 26.4 grams per tonne gold, 1033.7 grams per tonne silver, 0.21 per cent copper, 11.75 per cent lead and 6.93 per cent zinc (Assessment Report 8095).
In 1925, the Ore Mountain Mining Co. Ltd. acquired the Lake Shore claim (Lot 4808). During 1925-28, two crosscut tunnels, 18 metres and 116 metres long, respectively, and several opencuts were emplaced on the mineralization. Only minor surface work was reported during 1929-32. In 1955, the claim was acquired by Rufus-Argenta Mines Limited. In 1966, the company name was changed to Crest Ventures Limited. During 1966-67, Crest Silver Company Limited, a subsidiary of Crest Ventures, acquired the claim and carried out some geological mapping. During 1970-73, Ardo Mines Ltd. optioned the property and carried out prospecting, magnetometer and electromagnetic surveys. During 1979-80, Beaver Gold Resources Inc. acquired the property and carried out mapping, prospecting and sampling. In 1984, the property was owned by Grey Silver Mines Ltd. That year Maralgo Mines Limited optioned the property and flew an airborne VLF-EM and magnetometer survey over the area and conducted geological mapping, prospecting and sampling on the occurrence. No further work was reported until 1989 when Grey Silver Mines performed geological mapping, sampling and soil surveys in the area. The following year Varitech Resources Ltd. conducted a program of geological mapping, prospecting, sampling and soil, VLF-EM and magnetometer surveys in the area. The showing was resampled that year.
