Pretty Girl Occurrence, Mount Slade, Invermere, Windermere District, Golden Mining Division, British Columbia, Canadai

Regional Level Types
Pretty Girl Occurrence	Occurrence
Mount Slade	Mountain
Invermere	Community
Windermere District	Mining District
Golden Mining Division	Division
British Columbia	Province
Canada	Country

The Pretty Girl occurrence is located on a high ridge east of the summit of Mt. Slade, 20 kilometres due west of Invermere, British Columbia.

There is a brief description of the occurrence on the British Columbia “Minfile” site, current to 2011. Excerpts are quoted below:
“In 1898 the property comprised 6 claims, the Pretty Girl, Venus, New Chum, Beauty, Old Chum, and Minniehaha Fr., held by New Golden British Columbia, Limited of London, England. Development work was confined to the Pretty Girl claim at the 2280-metre elevation and included open cuts, a 72-metre adit, a 12-metre shaft and crosscut. A 450-kilogram shipment of ore was sent to England for test purposes. The claims (Lots 2570-2575 respectively) were Crown-granted to the company in 1900. The property was worked under lease in 1903 and two apparently new adits were driven to lengths of 100 metres and 14 metres, and the shaft deepened to 21 metres. Five tonnes of ore were mined in 1904 with 10,482 grams of silver and 1,214 kilograms of copper recovered.”
“The Pretty Girl area is underlain by upper Proterozoic coarse clastic sedimentary rocks of the Horsethief Creek Group. Early surface workings were reportedly in shale or slate dipping near vertical and striking about north 25 degrees west. The upper adit evidently followed a vein, which varies from a seam up to 25 centimetres in width, consisting of quartz somewhat stained with malachite (copper carbonate). The ore in the shaft, some of which was shipped and some specimens of which are still to be seen on the dump, carried grey-copper with high values in silver.”

Further comment by Giles Peatfield on geology of the locality:
The geology of the region including the Pretty Girl occurrence was described in detail by Reesor (1973). Interestingly, although he described many of the mineral occurrences in the region, he made no mention of the Pretty Girl.
Comments by Giles Peatfield on some of the minerals reported from the locality:
Ankerite: Reported by Payne (1988), in polished thin section.
Galena: Traces of galena were reported by Payne (1988) in polished thin sections.
Hematite: Reported as a weathering product by Payne (1988).
Limonite: Reported as a weathering product by Payne (1988).
Muscovite: Reported by Payne (1988) in polished thin sections.
Sericite: Reported by Payne (1988) in polished thin sections.
Tetrahedrite group: Warren and Lord (1935) described this as “schwatzite”, and found on analysis that it contined about 6.6 percent mercury.
In addition, Payne (1988) noted, in one polished section, an unknown mineral which he described as “Mineral X (possibly native bismuth, bismuth telluride or native silver) [which] forms one equant grain 0.07mm in size. It is pale cream in color with high reflectivity, and occurs with chalcopyrite surrounded by tetrahedrite. Identification of this phase will require S.E.M. analysis.” I can find no record of such work having been done.

Other Databases

Link to British Columbia Minfile:	082KNE025

Other Regions, Features and Areas containing this locality

References