The MS prospect is located 1.5 kilometres north of Blue Lake near Richter Pass. Osoyoos is 7.5 kilometres to the southeast.
The occurrence was staked on the MS claim in 1980 by Highmark Resources Ltd., which also acquired the Chickamin (Lot 799) and Divide (Lot 800) Reverted Crown grants and staked the ES, CM, WR, BW and GM claims. Highmark carried out geological mapping, a geochemical soil survey, surface stripping and trenching and diamond drilling. Drilling consisted of 16 EXT holes totalling 453.5 metres and 8 BQ holes totalling 1153.9 metres. The Chickamin and Divide Reverted Crown grants were first Crown granted in 1895 to Adams British Columbia Co. Ltd. It is reported that a short adit was driven.
The MS occurrence lies within granodiorite and diorite of the Middle Jurassic Similkameen intrusions which have intruded quartzite, schist and greenstone rocks of the Carboniferous to Permian Kobau Group. To the north and east, the Kobau rocks are exposed. To the south, syenitic rocks of the Jurassic Kruger pluton occur. Fissuring, shearing and fracturing of andesite and other volcanic rocks on the property is extensive and is possibly related to the northwest trending Blue Lake fault.
Mineralization occurs in shear hosted quartz veins within granodiorite. On the neighbouring Mam prospect (082ESW205), the main vein is 1 centimetre to over 1.50 metres wide, strikes 135 degrees, dips 75 degrees southwest, and is traceable over a distance of 244 metres. Minerals hosted by quartz veins include pyrite, pyrrhotite, chalcopyrite, bornite, native silver, native gold and microscopic tellurides of gold, silver and bismuth. Alteration extends for considerable distances either side of the veins. Copper sulphides have been locally oxidized to malachite and azurite. Propylitic alteration minerals include chlorite, sericite, epidote, carbonate, calcite, and feldspar.
In 1980 and 1981, diamond drilling was centred on quartz veins on the MS claim. The best gold and silver intersections from EXT drillholes is as follows: drillhole 80-6 yielded 0.68 gram per tonne gold, 85.03 grams per tonne silver and 0.02 per cent copper over the 30 centimetre intersection between 4.26 and 4.56 metres (Assessment Report 9402); drillhole 80-10 intersected 173 grams per tonne gold over the 1.2 metre interval between 31.70 to 32.90 metres (Assessment Report 9402). Gold and silver values were lower from BQ drillholes. Gold values ranged from 0.07 to 2.40 grams per tonne and silver values from 0.07 to 21.60 grams per tonne (Assessment Report 9402).
