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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  07-Jan-2020 by Karl A. Flower (KAF)

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NMI 092L2 Au34
Name NOOTKA Mining Division Alberni, Nanaimo
BCGS Map 092L007
Status Showing NTS Map 092L02E
Latitude 050º 02' 24'' UTM 09 (NAD 83)
Longitude 126º 44' 50'' Northing 5545509
Easting 661309
Commodities Copper, Gold, Silver, Zinc Deposit Types
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Nootka occurrence is located on steep slopes near an un-named creek flowing southwest into the Nomash River, approximately 2.7 kilometres southeast of its junction with the Zeballos River.

Regionally, the area is underlain by limestone and calcareous sedimentary rocks of the Quatsino Formation and basaltic volcanic rocks of the Karmutsen Formation, both of the Upper Triassic Vancouver Group. To the southwest, these have been intruded by granodioritic rocks of the Jurassic Island Plutonic Suite and quartz dioritic rocks of the Eocene to Oligocene Mount Washington Plutonic Suite.

The Geological Survey of Canada Summary Report 1932, Part A II describes the occurrence as a pronounced shear zone, striking 040 degrees and dipping 80 degrees southeast in altered green mafic volcanic rocks of the Karmutsen Formation. Associated with the shear zone is a 1-metre vuggy quartz lens mineralized with chalcopyrite and pyrrhotite. Extending for 0.6 metres from the quartz lens along the shear zone is an area seamed with quartz veins, epidote and garnet, but little sulphides.

Other zones of mineralization are reported 20 metres southwest and 60 metres northeast of the shear zone and are composed of 15 to 45-centimetre wide quartz-chalcopyrite-pyrrhotite bands.

In 1932, a sample of oxidized material from the richest part of the vein is reported to have assayed 17.07 per cent copper, 13.7 grams per tonne gold and 124.8 grams per tonne silver (Assessment Report 12864).

In 1995, quartz vein float samples with chalcopyrite and pyrrhotite yielded up to 23.28 grams per tonne gold, 42.2 grams per tonne silver, 0.114 per cent zinc and 8.69 per cent copper (Sample 599522; Assessment Report 24184).

During the 1930s and 1940s, the area was prospected by Alfred Bird. In 1966, Malaspina Mining Co. Ltd. completed a program of soil sampling, geological mapping and a 6.6 line-kilometre ground magnetic survey on the area as the Rugged group. In 1989, Golden Quadrant Resources completed 12.8 line-kilometres of ground electromagnetic and magnetic surveys on the area as the Nomash Silver claim.

In 1994 and 1995, Orvana Minerals Corp. completed a program of rock and silt sampling and geological mapping on the area as the Nomash property. In 2009, Global Silver Producers Ltd. and A25 Gold Producers Corp. prospected the area. No workings or mineralization were identified during this time. In 2017, Pacific West Stone Inc. completed a program of prospecting, geological mapping and rock sampling on the area.

Bibliography
EMPR AR 1967-283
EMPR ASS RPT 868ΒΈ *12864, 18928, *24184, 31273, 36783
EMPR BULL 20, Part V, pp. 16,27
EMPR FIELDWORK 1982, p. 290; 1983, p. 219
GSC EC GEOL 1
GSC MAP 4-1974; 255A; 1028A; 1552A
GSC MEM 204; 272
GSC OF 9; 170; 463
GSC P 38-5; 40-12; 69-1A; 70-1A; 72-44; 74-8; 79-30
GSC SUM RPT 1929A; *1932, Part A II, p. 44
Carson, D.J.T., (1968): Metallogenic Study of Vancouver Island with
emphasis on the Relationship of Plutonic Rocks to Mineral Deposits,
Ph.D. Thesis, Carleton University, Ottawa
Stevenson, J.S. (1938): Lode Gold Deposits of the Zeballos Area

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