The Rose Pass occurrence is located at approximately 1768 metres elevation, a short distance to the east of Rose Pass summit and approximately 45 kilometres west of Kimberley.
The area is underlain by phyllite, quartzite and grit of the Upper Proterozoic Horsethief Creek Group (Windermere Supergroup) and quartz arenite sedimentary rocks of the Middle Proterozoic Mount Nelson Formation (Purcell Supergroup).
Locally, quartz veins, up to 60 centimetres wide but averaging approximately 30 centimetres, occupying fractures in black argillite and schists of the Middle Proterozoic Mount Nelson Formation (Purcell Supergroup) host galena, sphalerite, chalcopyrite, pyrite and a tin- bearing mineral, probably stannite. A small dike or sill of granite porphyry intrudes the strata. The vein strikes north east and dips steeply west.
A sample is reported to have assayed 312 grams per tonne silver and 1.15 per cent tin (National Mineral Inventory).
In 1980, a 0.6-metre chip sample (23851) of hanging wall sediments assayed 0.260 per cent lead and 8.2 grams per tonne silver, while a rock sample (23863) of massive sulphide assayed 0.245 per cent copper and greater than 0.400 per cent lead, 0.400 per cent zinc, 0.100 per cent antimony and 20.0 grams per tonne silver, respectively (Assessment Report 8915). Drilling, performed the same year, intercepted a mineralized quartz zone with an aggregate thickness of approximately 2.7 metres with an additional 3.3 metres of mineralized schist, yielding an average of 119.7 grams per tonne silver, 3.6 per cent lead and 4.6 per cent zinc (Assessment Report 8915).
In 1989, samples are reported have yielded up to 918.3 grams per tonne silver, 13.11 per cent lead and 7.18 per cent zinc (Assessment Report 20681). The following year, a drill hole (L-91-01), located approximately 600 metres to the south, intercepted fine- to medium- grained galena and sphalerite mineralization occurring predominantly within a quartz feldspar porphyry. It is associated with hair-line fractures and narrow quartz veinlets. Sphalerite mineralization also occurs within a phyllite and limestone overlying conglomerate in the lower Horsethief Creek Group. Assays are reported to have averaged approximately 0.10 per cent zinc over approximately 6 metres (Assessment Report 22097).
In 2008, a grab sample (RP08-01) of vein material assayed 144.8 grams per tonne silver, 15.85 per cent zinc, 5.156 per cent lead, 0.428 per cent copper, 0.096 per cent cadmium and 0.023 per cent tin (Assessment Report 30380).
The area was originally staked and explored in the 1890’s. The workings consisted of two shallow open cuts approximately 518 metres apart and an adit or shaft (Macrob) of unknown length. The showings were restaked in 1936 but there is no report of the work performed at that time. In 1966, Rose Pass Mines Ltd acquired the Rose Pass property, comprising the Silver 5-10 claims, and staked the Vi 1-8 claims. An induced potential survey was apparently carried out over the property. The company name was changed in 1974 to Range Industries Ltd. The showings were held in 1980 as the KJ claim (9 units) by Gerhardi Holdings Ltd, of Nelson. A program of geological mapping, rock sampling and nine drill holes were completed during this time. During 1989 through 1991, South Kootenay Goldfields completed programs of rock and soil sampling, geological mapping and a diamond drill hole, totalling 197.4 metres, on the area as the Lapointe Creek property. In 2008, a minor program of rock sampling and prospecting was completed.