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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  04-Jun-2020 by George Owsiacki (GO)

Summary Help Help

NMI 104I7 Gem2
Name NCW Mining Division Liard
BCGS Map 104I027
Status Showing NTS Map 104I07E
Latitude 058º 16' 26'' UTM 09 (NAD 83)
Longitude 128º 37' 36'' Northing 6459264
Easting 521899
Commodities Jade/Nephrite, Gemstones Deposit Types Q01 : Jade
Tectonic Belt Intermontane Terrane Cache Creek, Plutonic Rocks
Capsule Geology

The NCW occurrence is located a few kilometres east of Provencher Lake, about 90 kilometres east-southeast of the community of Dease Lake.

The area is underlain by Mississippian to Triassic Cache Creek Complex rocks including metavolcanics (greenstone), metasediments and tectonically emplaced ultramafic rocks. The upper Mississippian to Permian Cache Creek Complex ultramafic rocks consist of peridotite, dunite and pyroxenite which are generally serpentinized.

The NCW nephrite jade showing occurs halfway between the ridge top and the valley floor, on a steep east-facing slope. The jade occurs at the margin of metamorphosed sedimentary rock and serpentinite. The lens trends 125 degrees and dips steeply southwest. Alteration at the contact is intense with much diopside present.

The jade outcrop is reported to cover a relatively large area on the slope. Quality of the material was reported to be difficult to discern due to partial oxidation of surface samples. The jade is reported to be hard and dense with an attractive bluish green colour.

In 1972, Frobex Ltd. mapped the property and Delphi Resources and Nephro-Jade Canada did the same in 1973.

Bibliography
EMPR GEM 1974-381
EMPR ASS RPT 4801, 4802, *5100, 35338
EMPR AR 1961-119-126
EMPR OF 1989-18; 1996-11
GSC MEM 194, p. 14
GSC P 72-53; 74-1A, p. 375; 78-1A, pp. 25-27; *78-19, p. 34
GSC OF 610; 2262; 2779
GSC BULL 504
GSC MAP 9-1957; 29-1962; 1418A; 1712A

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