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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Dec-2013 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name NOBLE, NUB, NOBLE B Mining Division Alberni
BCGS Map 092F042
Status Prospect NTS Map 092F05E
Latitude 049º 26' 07'' UTM 10 (NAD 83)
Longitude 125º 44' 04'' Northing 5479440
Easting 301756
Commodities Gold, Silver, Zinc, Lead, Copper Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Noble occurrence is located on Noble Creek, between 200 and 270 metres elevation and north east of the creek from about 365 to 525 metres elevation.

The area is underlain by andesitic and basaltic volcanics of the Upper Triassic Karmutsen Formation, Vancouver Group. Thin members, which may be altered tuffs also occur. The volcanics are intruded by quartz diorite dykes. These dykes are associated with the Early to Middle Jurassic Island Plutonic Suite which, in this region, make up a large portion of the surface geology.

Locally, a system of veins occur in volcanics occupying joints along which there has been some shearing. One vein occurs in 5 metre wide quartz diorite dyke. The veins exposed near the creek, the dyke, and a wider vein found northeast of the creek strike from 025 to 040 degrees. Most of veins and the dyke dip from 65 to 75 degrees to the southeast, one vein dips 80 degrees to the north and the wider vein dips vertically. The veins exposed at the higher elevations to the northeast of the creek strike from due north to 020 degrees and dip eastward from 60 to 70 degrees.

The veins generally pinch and swell along strike and rarely exceed 23 centimetres in width. However, mineralized shears found to the northeast of the creek reach widths of 60 centimetres or more. The veins or lenses consist of quartz and carbonate which host moderate percentages of sulphides. The sulphides include pyrrhotite, chalcopyrite, marcasite, galena, some sphalerite and probably pyrite. Free gold has been reported. Samples of these veins taken by Bancroft in 1939 generally assayed between 4 and 67 grams per tonne gold and between 3 and 41 grams per tonne silver (Bulletin 8, page 38). The sample with the greatest width assayed 10.38 grams per tonne gold and 6.86 grams per tonne silver across 48 centimetres.

A test shipment totalling 2.25 tonnes of ore was made in 1942. This ore contained 91.89 grams per tonne gold, 17.14 grams per tonne silver, 1.9 per cent zinc, 0.8 per cent lead and a trace of copper (Minister of Mines Annual Report 1942, page A31).

During 1972 through 1982, W. Guppy and Golden Hinde Mines completed programs of prospecting, rock and soil sampling, geological mapping and four packsack drill holes, totalling 20 metres, on the area by as the Cub and Nub claims.

Bibliography
EMPR AR 1940-73; 1942-81; 1946-183; 1947-181
EMPR ASS RPT 4101, *4354, *4951, 4962, *5419
EMPR BULL *8, p. 36-38; 13
EMPR EXPL 1975-E97
EMPR GEM 1972-267, 1973-232, 1974-176
EMPR PF (Starr, C.C. (1940): Report on the Noble B Group of Mining
Claims; Sketch showing Noble B Group plan of "assays", 1940;
Sketch showing plan of Noble B Mining Claims showing veins,
1940)
GSC MAP 17-1968; 1386A
GSC MEM 204, p. 25
GSC OF 463
GSC P 68-50, p. 38; 72-44; 79-30; 80-16
Carson, D.J.T. (1968): Metallogenic Study of Vancouver Island With
Emphasis on the Relationships of Mineral Deposits to Plutonic
Rocks, Unpublished Ph.D. Thesis, Carleton University
EMPR PFD 6778, 810009

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