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File Created: 17-Jan-1990 by Garry J. Payie (GJP)
Last Edit:  01-Jan-0001 by BC Geological Survey (BCGS)

Summary Help Help

NMI
Name MOYEHA 2 (L.1702), MOYEHA RICH LEAD Mining Division Alberni
BCGS Map 092F041
Status Showing NTS Map 092F05W
Latitude 049º 25' 38'' UTM 10 (NAD 83)
Longitude 125º 55' 16'' Northing 5479053
Easting 288190
Commodities Gold, Silver, Lead Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Moyeha 2 occurrence is located near the northwest corner of the head of Herbert Inlet. To the east of the occurrence the area is underlain by volcanics of the Upper Triassic Karmutsen Formation (Vancouver Group); to the west the volcanics are intruded by a stock of the Jurassic Island Intrusions. These plutonic rocks on Vancouver Island vary in composition from gabbro to quartz monzonite but are mainly granodiorite and quartz diorite.

The country rock is a highly altered andesite that is described as massive, fine-grained and having amygdaloidal phases. Dykes of quartz porphyry have invaded the andesite to the southwest where both rock types are known to host deposits similar to this one. See Moyeha 1 (092F 179).

A quartz vein occurring in andesite strikes 080 degrees and dips 38 degrees south. It has been traced along its length for about 90 metres at an elevation of 125 metres. The width varies from 5 to 15 centimetres, averaging about 7.5 centimetres. The vein is typically drusy and contains small amounts of chalcopyrite, pyrite, galena and free gold. A 7.6 centimetre sample of typical quartz assayed 29.49 grams per tonne gold and 27.43 grams per tonne silver (Minister of Mines Annual Report 1935, page F46).

About 10 metres in elevation below the main vein a 5 centimetre wide quartz vein was exposed in a trench over a length of 15 centimetres. The nature of this vein is similar to that of the above vein.

Bibliography
EMPR AR 1933-252, *1935-F45
EMPR FIELDWORK 1988, pp. 61-74
GSC MAP 17-1968; 1386A
GSC MEM *204, pp. 23,24
GSC OF 463
GSC P 68-50; 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Metallogenic Study of Vancouver Island With Emphasis on the Relationships of Mineral Deposits to Plutonic Rocks, Unpublished Ph.D. Thesis, Carleton University

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