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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  14-Aug-1989 by Peter S. Fischl (PSF)

Summary Help Help

NMI
Name FORT ST. JAMES SOUTH Mining Division Omineca
BCGS Map 093K049
Status Past Producer NTS Map 093K08W
Latitude 054º 27' 37'' UTM 10 (NAD 83)
Longitude 124º 17' 53'' Northing 6035510
Easting 415857
Commodities Limestone Deposit Types R09 : Limestone
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

Limestone outcrops on the south side of a 15 metre high knoll on the north shore of Stuart Lake over a length of 300 metres with widths of up to 76 metres, 3.5 kilometres northwest of Fort St. James. The deposit is situated on the southwest margin of 200 kilo- metre long belt of limestone with minor chert, argillite and green- stone (andesite) of the Mississippian to Triassic Cache Creek Group that extends northwestwards along Stuart Lake.

The deposit is composed of light to dark grey, very fine grained, well fractured limestone that is frequently cut by calcite veinlets up to 1.3 centimetres thick. The limestone contains some black and rusty stained cherty argillite lenses. A grab sample of randomly collected chips from the floor of the quarry assayed 54.81% CaO, 0.93% MgO, 0.17% insolubles, 0.10% R2O3, 0.06% Fe2O3, 0.003% MnO, 0.01% P2O5, 0.002% sulphur and 43.98% ignition loss (EMPR Annual Review 1968, p. 310)

A small amount of limestone was produced from a quarry located 46 metres north of the road that leads to Fort St. James along the north shore of Stuart Lake.

Bibliography
EMPR AR 1968-310
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 69-86, 475-482
EMPR OF 1993-9
EMPR MIN POT MAP 1993-2
GSC OF 2593, 3182
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13
GSC MEM 252, pp. 32-36
GSC MAP 630A; 907A; 1424A

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