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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  02-Dec-14 by Laura deGroot(LDG)

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Name DRIFTWOOD CREEK, FISH Mining Division Golden
BCGS Map 082K098
Status Showing NTS Map 082K15E
Latitude 50º 54' 16" N UTM 11 (NAD 83)
Longitude 116º 34' 34" W 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.

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