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File Created: 24-Aug-1995 by Gilles J. Arseneau (GJA)
Last Edit:  05-Sep-1995 by Gilles J. Arseneau (GJA)

Summary Help Help

NMI
Name MIN 4 Mining Division Golden
BCGS Map 082K038
Status Showing NTS Map 082K08W
Latitude 050º 21' 46'' UTM 11 (NAD 83)
Longitude 116º 27' 57'' Northing 5579104
Easting 537993
Commodities Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
E12 : Mississippi Valley-type Pb-Zn
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Min 4 occurrence is located 4 kilometres north of Toby Creek in the Golden Mining Division. The occurrence is on the north flank of the ridge that separates Pharaoh and Jumbo creeks.

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.

On the Min 4 property, galena, sphalerite and tetrahedrite occur in small southeast-trending veins within dolomite of the Mount Nelson and Dutch Creek formations. All veins are very small and considered to be uneconomical (Assessment Report 9846).

Bibliography
EMPR ASS RPT *9846, 16117
EMPR FIELDWORK 1989, pp. 29-37
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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