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File Created: 04-Sep-1986 by Larry Jones (LDJ)
Last Edit:  23-Dec-1988 by Jonathan N. Rouse (JNR)

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NMI
Name BARON ISLAND Mining Division Skeena
BCGS Map 103J047
Status Showing NTS Map 103J07W
Latitude 054º 28' 34'' UTM 09 (NAD 83)
Longitude 130º 47' 11'' Northing 6037965
Easting 384249
Commodities Silver, Lead, Zinc, Copper, Gold Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Coast Crystalline Terrane Plutonic Rocks, Alexander
Capsule Geology

The area is dominated by a Cretaceous to Tertiary diorite pluton and quartz diorite to dioritic gabbro sills of the Coast Plutonic Complex. Thin, discontinuous rafts of sedimentary rocks occur within the intrusions. Younger granodiorite sills intrude the sediments and diorites. To the northeast, lie a thick (>300 metres) sequence of pyroxene porphyry tuffs, flows and agglomerates with rhyolite lenses. Strike slip faults, with offsets of up to 100 metres are numerous and strike 060 to 080 degrees.

Quartz veins in diorite contain galena stringers, chalcopyrite, pyrrhotite and sphalerite. A grab sample assayed 1.55 per cent lead, 73.0 grams per tonne silver, 0.12 per cent zinc and 0.13 per cent copper. A quartz vein in granodiorite with pyrite and arsenopyrite, 100 metres to the south, assayed 0.24 grams per tonne gold. Graphitic sediments, 400 metres to the south, assayed 0.07 per cent zinc (Assessment Report 12777).

Bibliography
EMPR ASS RPT 12197, *12777
GSC MAP 12-1966; 1385A; 1472A
GSC MEM 394
GSC P 66-33

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