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File Created: 11-Aug-1989 by Peter S. Fischl (PSF)
Last Edit:  11-Aug-1989 by Peter S. Fischl (PSF)

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Name JOHN, NECOSLIE RIVER Mining Division Omineca
BCGS Map 093K040
Status Prospect NTS Map 093K08E
Latitude 054º 22' 05'' UTM 10 (NAD 83)
Longitude 124º 05' 59'' Northing 6025030
Easting 428552
Commodities Limestone Deposit Types R09 : Limestone
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

Limestone is exposed along the base of a slope for 650 metres on the northeast side of the Necoslie River road, 13 kilometres south- east of Fort St. James. The deposit lies on the southwest margin of a belt of limestone of the Carboniferous to Jurassic Cache Creek Group with minor chert, argillite and greenstone (andesite) up to 10 kilometers wide that extends northwest of Gordon Lake for 200 kilo- metres.

The deposit is comprised mostly of light grey, medium to fine grained limestone that becomes black in a few places. The limestone is cut by white calcite veinlets and contains a few cherty inclus- ions. A sample of randomly collected chips taken along a roadcut for 38.1 metres assayed 51.66% CaO, 0.14% MgO, 6.42% insolubles, 0.29% R2O3, 0.12% Fe2O3, 0.06% MnO, 0.03% P2O5, 0.011% sulphur and 40.78% ignition loss (Geology, Exploration and Mining in B.C. 1969, p. 393).

This deposit was partially stripped and drilled by Domtar Chemicals between 1968 and 1970.

EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 69-86, 475-482
EMPR GEM 1968-310; 1969-393; 1970-503
EMPR OF 1993-9
EMPR PF (Summary of Exploration and Development Forms by Domtar for 1968 and 1970)
GSC MAP 630A; 907A; 1424A
GSC MEM 252, pp. 32-37
GSC OF 2593, 3182
GSC P 90-1F, pp. 115-120; 91-1A, pp. 7-13