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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  30-Oct-2014 by Laura deGroot (LDG)

Summary Help Help

NMI
Name GREAT NORTHERN (L.5358), TATLER, BJ, FARNHAM Mining Division Golden
BCGS Map 082K048
Status Prospect NTS Map 082K08W
Latitude 050º 25' 29'' UTM 11 (NAD 83)
Longitude 116º 29' 21'' Northing 5585980
Easting 536286
Commodities Copper, Silver, Lead Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Great Northern prospect is located at the headwaters of Farnham Creek, on the west flank of Black Diamond Mountain in the Golden Mining Division. The property consists of a single Reverted Crown grant (Lot 5358).

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 prospect consists of vertical fissure veins up to 30 centimetres wide within silicified dolomitic limestone of the Mount Nelson Formation. The veins have been exposed by trenching for a distance of 200 metres along a northwest strike. Mineralization includes galena, pyrite, chalcopyrite, friebergite, azurite and malachite in a gangue of quartz and barite. A 1.2 metre chip sample across the mineralized vein assayed 35 grams per tonne silver, 4.37 per cent lead and 1.05 per cent copper (Property File - See 082KSE004, Sheppard, E.P. (1971): Geological Report on the Tatler Group).

Bibliography
EMPR AR 1900-806; 1903-245; 1920-114; 1968-266
EMPR ASS RPT 1614, 1977, 2515, 6099, 14574, *21066, 21789, 23880
EMPR EXPL 1976-E48; 1977-E66; 1985-C78
EMPR FIELDWORK 1989, pp. 29-37
EMPR GEOS MAP 1995-1
EMPR OF 1990-26
EMPR PF (*see Imperial, 082KSE004 - Geological Report on the Tatler
Group by E.P. Sheppard, 1971; *see Copper King, 082KSE003 -
Geological Report on Tatler Group by T.R. Tough, 1967; 82KSE
General File - Geology map by P. Billingsley, 1958; Prospectors Report 1995-37 by Robert
Jordan)
GSC MAP 1957-12; 1326A
GSC MEM 148, p. 50; 369, p. 115
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
EMPR PFD 520084

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