MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 082FSW165

File Created:	16-Sep-1987	by	Laura L. Coughlan (LLC)
Last Edit:	18-Jun-1991	by	Garry J. Payie (GJP)

SUMMARY

Summary Help


		NMI
Name	NEST EGG (L.1048)	Mining Division	Trail Creek
		BCGS Map	082F001
Status	Prospect	NTS Map	082F04W
Latitude	049º 04' 01''	UTM	11 (NAD 83)
Longitude	117º 48' 10''	Northing	5435208
		Easting	441362
Commodities	Gold, Copper, Silver	Deposit Types	L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt	Omineca	Terrane	Quesnel, Plutonic Rocks

Capsule Geology

The Nest Egg showing is considered to be Rossland-type mineralization, with sulphides infilling well-defined fractures and faults in the Early Jurassic Rossland monzonite. The host rock is comprised of a biotite-hornblende-augite monzonite stock which is medium-grained, grey to green in colour and hosts magnetite, apatite, some sphene with chlorite, epidote, pyrite and pyrrhotite.

The showing is a vein which strikes east-west and hosts pyrite, pyrrhotite and chalcopyrite with quartz-carbonate gangue. Over 72 tonnes of ore containing values in copper and gold were shipped from the Nest Egg in 1907, 1908 and 1934. Values in silver are also reported.

Samples taken as part of Ph.D. thesis were reported to contain only arsenopyrite, hematite, pyrite and appreciable magnetite (Thorpe, 1967, pages 18 and 32).

Bibliography

EMPR AR 1896-31,560; 1897-537; 1899-599; 1907-107,214; 1908-105,247; 1934-A27,E37; 1947-158; 1949-158

EMPR ASS RPT 24, 34

EMPR BC METAL MM00690

EMPR BULL *74, p. 40 and Figure 2 (mineral deposit table); 109

EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27; 1990, pp. 9-31

EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16

GSC MAP 1518; 1504A

GSC MEM 77

GSC OF 1195

GSC P 79-26

EG Vol. 68, 1973, pp. 1337-1346

*Thorpe, R.I. (1967): Controls of Hypogene Sulphide Zoning, Rossland, British Columbia, Ph.D. Thesis, University of Wisconsin

EMPR PFD 822470, 822474, 822475, 822572, 822573