MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 103I 097

File Created:	29-Oct-1986	by	Larry Jones (LDJ)
Last Edit:	10-Aug-1989	by	Laura L. Duffett (LLD)

SUMMARY

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		NMI	103I8 Cu3
Name	PTARMIGAN, THORN	Mining Division	Omineca, Skeena
		BCGS Map	103I048
Status	Showing	NTS Map	103I08W
Latitude	054º 29' 24''	UTM	09 (NAD 83)
Longitude	128º 25' 56''	Northing	6038190
		Easting	536779
Commodities	Silver, Copper, Lead, Zinc, Gold	Deposit Types	I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt	Intermontane	Terrane	Stikine, Plutonic Rocks

Capsule Geology

Granodiorite of the Cretaceous to Tertiary Coast Plutonic Complex contain small roof pendants of sheared Mesozoic and Paleozoic greenstone derived from greywackes, volcanics and quartzites. The roof pendants are 6 to 25 metres wide and contain quartz and carbonate veins parallel to the northeast trending schistosity. The veins are sparsely mineralized with tetrahedrite, chalcopyrite, pyrite, galena and sphalerite. A sample of a 2.4 metre wide mineral- ized zone assayed 150 grams per tonne silver (Minister of Mines Annual Report 1918) and a 4.6 metre chip sample assayed 55 grams per tonne silver and 0.3 grams per tonne gold (Minister of Mines Annual Report 1930). A selected sample of tetrahedrite and pyrite assayed 460 grams per tonne silver and trace gold (Geological Survey of Canada Memoir 205).

Bibliography

EMPR AR 1914-114; 1918-50,51; 1920-40; 1921-45; 1923-49; 1924-48,49; 1925-70,71; *1930-78

EMPR ASS RPT 13104, 14560, 15115

EMPR EXPL 1984-375; 1985-C373; 1986-C427

EMPR MAP 69-1; 8

EMPR PF (*DiSpirito, F. et al (1986): Geophysical, Geochemical and Geological Surveys on the Thorn Project in Prospectus for Castello Resources Ltd., July 13, 1987)

GSC MAP 1136A; 278A; 11-1956; 1385A

GSC MEM *205, pp. 27-29; 329, p. 78

GSC P 36-17, p. 46; 36-20, p. 25

GSC SUM RPT 1925A, p. 118; 1926A, pp. 41,42