MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 092JNE111

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

SUMMARY

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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