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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-Aug-1995 by Gilles J. Arseneau (GJA)

Summary Help Help

NMI 082K2 Pb2
Name RAD Mining Division Golden
BCGS Map 082K048
Status Showing NTS Map 082K08W
Latitude 050º 24' 47'' UTM 11 (NAD 83)
Longitude 116º 24' 36'' Northing 5584724
Easting 541920
Commodities Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Rad occurrence is located 37 kilometres along the Toby Creek road west of Invermere, in the Golden Mining Division. The property is at 1676 metres elevation above sea level on the south side of Delphine Creek.

Regionally, the area is underlain by Proterozoic clastic sedimentary rocks of the Purcell and Windermere supergroups and by lower Paleozoic strata of the Beaverfoot and Mount Forster formations (Geoscience Map 1995-1).

The Purcell Supergroup strata include the Aldridge, Creston, Kitchener, Dutch Creek and Mount Nelson formations. The Windermere Supergroup unconformably overlies the Purcell Supergroup rocks and includes the Toby Formation and Horsethief Creek Group (Paper 1990-1).

In the vicinity of the occurrence, rocks of the Kitchener and Dutch Creek formations have been further subdivided and assigned to the Van Creek and Gateway formations. The Van Creek Formation correlates with the Lower Kitchener Formation while the Gateway Formation is equivalent to the lower portion of the Dutch Creek Formation. The Mount Nelson Formation has been subdivided into seven discrete members, a lower quartzite, a lower dolomite, a middle dolomite, a purple dolomite, an upper middle dolomite, an upper quartzite, and an upper dolomite (Open File 1990-26).

Rocks of the Horsethief Creek Group, Beaverfoot and Mount Forster formations are folded and overthrusted by rocks of the upper portion of the Dutch Creek Formation and the lower members of the Mount Nelson Formation. The sedimentary rocks have undergone regional metamorphism to at least greenschist facies.

The occurrence is hosted within the lower dolomite member of the Mount Nelson Formation and consists of narrow veins and fractures within the crest of an anticline. The veins and fractures are parallel to the axis of the anticline. Mineralization consisting of galena, sphalerite and tetrahedrite occurs in white quartz veins (Assessment Report 9983).

Bibliography
EMPR AR 1968-267
EMPR ASS RPT 5542, *9983
EMPR EXPL 1975-E46; 1976-E47; 1977-E66
EMPR FIELDWORK 1989, pp. 29-37
EMPR GEM 1969-343,Fig.41,#83; 1971-425; 1972-73; 1973-91
EMPR GEOS MAP 1995-1
EMPR OF 1990-26
EMPR PF (82KSE General File - Geology map by P. Billingsley, 1958)
GSC MAP 1326A
GSC MEM 369
Pope, A.J. (1989): The Tectonics and Mineralization of the Toby- Horsethief Creek Area, Purcell Mountains, Southeast British Columbia, Canada, unpublished Ph.D. Thesis, University of London, England

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