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File Created: 24-Jul-85 by BC Geological Survey (BCGS)
Last Edit:  28-Dec-88 by Dorthe E. Jakobsen(DEJ)

Summary Help Help

NMI 104B1 Au3
Name VANCOUVER, PREMIER EXTENSION, WOODBINE Mining Division Skeena
BCGS Map 104B010
Status Prospect NTS Map 104B01E
Latitude 56º 03' 52" N UTM 09 (NAD 83)
Longitude 130º 01' 58" W Northing 6213733
Easting 435696
Commodities Gold, Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Vancouver showing is located on the Vancouver No.3 Crown Grant (L.4125) by the Granduc Road, north of the Woodbine workings (104B 090) and 24 kilometres north of Stewart, British Columbia. The majority of the work on the property was carried out in 1929 during the search for the extension to the Silbak Premier "West" or "Northwest" mineralized zone. For a more extensive geological de- scription and bibliography refer to the Silbak Premier Mine (104B 054).

The showing is located in the Intermontane Belt, bounded on the west by the Coast Crystalline Complex and on the east by the Bowser Basin, in the volcanic arc assemblage of the Stikinia Terrane.

Mineralization is hosted in Late Triassic to Early Jurassic Hazelton Group, Unuk River Formation. The Hazelton Group is a northwest trending belt of folded metavolcanic rocks containing a thick sequence of argillites and siltstones infolded along a synclinal axis.

The showing is hosted in the Unuk River Formation andesite flows, breccia and lapilli tuff. This sequence is intruded by the Early Jurassic Texas Creek plutonic suite porphyry dykes and is unconformably overlain by volcaniclastic and epiclastic rocks. This package is intruded by extensive Eocene Hyder granitic dykes and they, along with several faults, have "chopped up" the area.

Silicified potassium feldspar porphyry dykes strike north across the property. Mineralization is contained partially in the dykes and partially in the andesite tuff commonly as grey siliceous breccia or sometimes in quartz stringers up to 6 centimetres wide. Silicifica- tion is most intense in mineralized zones. The host rocks are sheared and fractured to some extent and contain minor disseminated pyrite.

Mineralization on the property consists of blebs and dissemin- ations of pyrite and rare small blebs and stringers of galena and sphalerite.

An adit driven on a porphyry dyke exposed a 2.7 metre wide silicifed zone mineralized with pyrite, sphalerite and galena. The zone strikes 172 degrees and dips 30 degrees west. A 2.74 chip sample across the best mineralization in this zone was 2.057 grams per tonne gold, 20.57 grams per tonne silver and 0.4 per cent zinc (Minister of Mines Annual Report 1936, page B12).

Bibliography
EMPR AR 1922-85; 1923-86; 1924-366; 1925-101; 1926-101; *1927-99;   1928-114; *1929-108; *1936-B11,B12
EMPR ASS RPT *7522, 8723, 12235, 17151
EMPR BULL 58, pp. 169; 63; 132
EMPR EXPL 1979-278; 1980-459; 1983-518
EMPR FIELDWORK 1983, pp. 149-165; 1984, pp. 316-342; 1985, pp. 217-  219; 1986, pp. 81-92; 1987, pp. 211-216,349-352,489-493
EMPR OF MAP *1987-22
EMPR PF (Starr, C.C. (1929): Report of Preliminary Examination of  the Property of Premier Extension Mining Company)
EMR MP CORPFILE (Premier Extension Gold Mining Company)
GSC MAP 9-1957; 1418A
GSC MEM 175, p. 162
GSC P 89-1E, pp. 145-154
GCNL #140, 1980
N MINER Jan.15,1981
Brown, D.A., (1987): Geological Setting of the Volcanic-Hosted Silbak  Premier Mine, Northwestern British Columbia, M.Sc. Thesis,  University of British Columbia (copy in Property File, 104B 054)

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