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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  09-Oct-86 by Brian Grant(BG)

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Name DUNBAR CREEK, M7, M8 Mining Division Golden
BCGS Map 082K089
Status Showing NTS Map 082K16W
Latitude 50º 48' 45" N UTM 11 (NAD 83)
Longitude 116º 20' 27" W Northing 5629182
Easting 546439
Commodities Magnesite Deposit Types E09 : Sparry magnesite
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Dunbar Creek showings are all alteration (ie. replacement) deposits hosted by the basal member of the Upper Proterozoic Mount Nelson Formation dolomites. Magnesite occurs at six locations, all on or close to known faults. A grab sample (M7) collected close to Dunbar Creek, near a vertical northwest striking fault, contains 41.41 per cent MgO, 2.84 per cent CaO, 47.48 per cent CO2, 3.97 per cent SiO2 and 2.07 per cent Fe (total). The dolomite here is altered to a coarse-grained, highly irregular magnesite zone about 30 metres northeast of the fault.

North of the first site and across Dunbar Creek a low hill of dolomite is partly altered throughout and contains several, irregular patches composed completely of magnesite. A sample (M8) of this material contains 42.28 per cent MgO, 2.67 per cent CaO, 48.28 per cent CO2, 3.22 per cent SiO2 and 1.03 per cent Fe (total).

Several smaller magnesite bodies occur in the immediate area to the main showings.

EMPR AR 1964-199
EMPR OF 1987-13