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File Created: 29-Oct-1986 by Larry Jones (LDJ)
Last Edit:  11-Aug-1989 by Laura L. Duffett (LLD)

Summary Help Help

NMI 103I8 Au2
Name GOLDEN NIB, GLOBE, IRON HAT, STAR, THORN Mining Division Skeena
BCGS Map 103I048
Status Past Producer NTS Map 103I08W
Latitude 054º 29' 29'' UTM 09 (NAD 83)
Longitude 128º 28' 06'' Northing 6038326
Easting 534439
Commodities Gold, Silver, Copper Deposit Types I02 : Intrusion-related Au pyrrhotite veins
L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Intermontane Terrane Plutonic Rocks, Stikine
Capsule Geology

A 1.5 to 4.5 metre wide shear zone, striking 045 degrees and dipping 70 degrees southeast, occurs in coarse grained granodiorite of the Cretaceous to Tertiary Coast Plutonic Complex. The zone, which is up to 300 metres long and 180 metres vertical distance, contains quartz lenses and veins mineralized with pyrite and chalco- pyrite. Associated alteration minerals include epidote, chlorite and biotite.

In the area of the main vein, remnants of older Mesozoic and Paleozoic sedimentary rocks, mainly greywacke, have been altered to greenstone. North trending faults, dipping 50 to 70 degrees west, cut the vein. Mineralization is erratic with lenses up to 2 metres and assays up to 7.7 grams per tonne gold and 14 grams per tonne silver (Assessment Report 11335). A grab sample assayed 4.2 grams per tonne gold, 26.1 grams per tonne silver and 1.20 per cent copper (Assessment Report 13104).

In 1926, about 27 tonnes of hand-sorted ore were shipped from the Golden Nib property. From this ore 1,493 grams of gold, 1,275 grams of silver and 302 kilograms of copper were recovered. Two tonnes of ore were shipped to the Provincial Government sampling plant in Prince Rupert between 1938 and 1941. This shipment produced 124 grams of gold and 62 grams of silver.

Bibliography
EMPR AR 1918-52; 1920-41; 1921-45; 1923-49; *1925-71; 1926-64,75; *1928-75,76; 1938-B26,B36; 1941-42
EMPR ASS RPT 11335, 13104, 14560
EMPR BULL 1, 1932, pp. 21,30
EMPR EXPL 1983-502; 1984-375
EMPR MAP 8; 69-1
EMPR PF (*DiSpirito, F. et al. (1986): Geophysical, Geochemical and Geological Surveys on the Thorn Project in Prospectus for Castello Resources Ltd., Jul. 13, 1987)
GSC MAP 11-1956; 278A; 1136A; 1385A
GSC MEM *205, pp. 25,26; 329, p. 78
GSC P 36-17, pp. 42-44; 36-20, pp. 27,28
GSC SUM RPT 1925A; 1926A, pp. 39,40

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