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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  02-Dec-2014 by Laura deGroot (LDG)

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NMI
Name DRIFTWOOD CREEK, FISH Mining Division Golden
BCGS Map 082K098
Status Showing NTS Map 082K15E
Latitude 050º 54' 16'' UTM 11 (NAD 83)
Longitude 116º 34' 34'' Northing 5639284
Easting 529805
Commodities Magnesite Deposit Types E09 : Sparry magnesite
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

Lower Cambrian Cranbrook Formation quartzites, dolomites and phyllitic argillites host medium to coarse-grained crystalline magnesite. The occurrence is at the western end of the rocky ridge north of Driftwood Creek. Beds of slatey phyllites, overlain by a fine-grained dark, cherty dolomite, form the footwall to a strike exposure of about 110 metres of magnesite beds. The stratigraphy trends 290 degrees northwest and dips 80 to 85 degrees southwest.

Southwest and overlying the dolomite is a 65 metre thick sequence of medium to coarse-grained magnesite containing cherty blebs and lenses. This section also hosts two continuous horizons of massive magnesite 4.5 and 2.2 metres thick. A metallurgical test sample was collected from the lower, 4.5 metre thick, magnesite body and ran 42.5 per cent MgO. The upper part of this unit is host to a horizon of white to yellow, fine-grained orthoquartzite similiar to that exposed below slatey phyllites.

The upper 45 metres of the section is a massive, medium to coarse-grained magnesite with no visible impurities and is exposed for several hundred metres along strike. A bulk sample from this section contained 40 per cent MgO.

Bibliography
EMPR ASS RPT 8760
EMPR FIELDWORK 1983, p. 213
EMPR OF 1987-13
EMPR PF (Prospectors Report 2001-28 by Peter Klewchuk)

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