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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  10-Sep-1991 by Robert G. Gaba (RGG)

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NMI
Name JIM CREEK Mining Division Lillooet
BCGS Map 092J098
Status Showing NTS Map 092J15E
Latitude 050º 56' 55'' UTM 10 (NAD 83)
Longitude 122º 33' 20'' Northing 5644204
Easting 531221
Commodities Jade/Nephrite, Gemstones Deposit Types Q01 : Jade
Tectonic Belt Coast Crystalline Terrane Bridge River
Capsule Geology

The Jim Creek nephrite showing is located at the headwaters of Jim Creek, 3.8 kilometres northeast of the west end of Marshall Creek. The showing is a cigar-shaped mass of nephrite, 1 by 1 by 4 metres, and is within calc-silicate altered serpentinite melange (in part rodingite) of the Shulaps Ultramafic Complex and adjacent to chert of the Mississippian to Jurassic Bridge River Complex (Group).

Botryoidal nephrite occurs as thin ribbons (30 to 60 centimetres thick), within serpentinite, but is not of commercial value. The main showing is an estimated 10 tonnes. Jim Creek, directly below the deposit, contains alluvial boulders of nephrite in such abundance as to suggest an alternate, yet undiscovered, source in the area.

Bibliography
EMPR BULL 32 (Map)
EMPR FIELDWORK 1974, p. 35; 1985, pp. 303-310; 1986, pp. 23-29; 1987, pp. 93-130; 1988, pp. 105-152; 1989, pp. 45-72; 1990, pp. 75-83
EMPR OF 1987-11; 1988-3; 1989-4; 1990-10
GSC P 78-19, pp. 21,26,27
CJES 1987, Vol. 24, pp. 2279-2291
EMPR PFD 673462

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