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File Created: 13-Jul-1988 by Larry Jones (LDJ)
Last Edit:  27-Mar-2022 by Nicole Barlow (NB)

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NMI 104B1 Au1
Name PICTOU Mining Division Skeena
BCGS Map 104B010
Status Past Producer NTS Map 104B01E
Latitude 056º 02' 55'' UTM 09 (NAD 83)
Longitude 130º 01' 02'' Northing 6211956
Easting 436639
Commodities Silver, Gold, Zinc, Lead, Copper Deposit Types G07 : Subaqueous hot spring Ag-Au
G06 : Noranda/Kuroko massive sulphide Cu-Pb-Zn
I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt Insular Terrane Stikine
Capsule Geology

The Pictou zone of the Silbak Premier mine is located between Fletcher and Wilson Creeks 22.0 kilometres north of Stewart, British Columbia. The zone is offset to the east, just south of the main deposit across an east-west fault. For a more extensive geological description and bibliography refer to the Silbak Premier Mine (104B 054).

The property 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.

The deposit is hosted by Upper Triassic to Lower Jurassic andesite flows, breccia and lapilli tuff, correlated with the 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 andesite, at least 750 metres thick, is intruded by Early Jurassic Texas Creek plutonic suite dacitic porphyry dykes and is un- conformably overlain by volcaniclastic and epiclastic rocks. The potassium feldspar porphyry (historically known as "Premier Porphyry") is spatially associated with the ore; this relationship is thought to indicate a Lower Jurassic age for mineralization. The ore is predominantly discordant but locally concordant with the moderately northwest-dipping andesite flows, breccias and dacite flows.

Hydrothermal alteration zones related to the mineralizing system are represented by a proximal silicification/quartz stockwork and potassium feldspar and/or sericite facies potassic alteration. Peripheral to mineralization is a propylitic alteration assemblage of carbonate, chlorite and pyrite.

Mineralization is associated with the steeply northwest dipping, "Northeast" or "Main" zone where there are at least four styles of mineralization with textures ranging from stockwork and siliceous breccia to locally layered and massive sulphide-rich mineralization. Pictou mineralization consists of narrow discrete quartz veins rich in base metals. The Pictou vein averages 6 metres in width.

Ore minerals include pyrite, galena, sphalerite, argentite, chalcopyrite and arsenopyrite. Gangue minerals are quartz, potassium feldspar, chlorite, carbonate and others.

In 1980 a resampling program resulted in an assay of 3.771 grams per tonne gold, 142.262 grams per tonne silver, 0.08 per cent copper, 6.10 per cent lead and 12.10 per cent zinc from a trench above the Pictou tunnel (Phendler, R.W., 1980).

In 1986 a drill core sample of the Pictou vein over 5.7 metres assayed 0.27 grams per tonne gold and 173.11 grams per tonne silver (Assessment Report 15762, Fig. 3). Production from this zone is included with the Silbak Premier mine production figures.

Bibliography
FOR AN EXTENSIVE BIBLIOGRAPHY ON SILBAK PREMIER MINE SEE 104B 054
EMPR AR 1911-72,73; 1917-68; 1918-80,472; 1919-74
EMPR ASS RPT *15762, 38850, 39342
EMPR BULL 58, p. 109
EMPR EXPL 1980-459
EMPR PF (Phendler, R.W., (1980): Report on the Silbak Premier Gold-Silver Mine, Skeena Mining Division, British Columbia for British Silbak Premier Mines Ltd.; British Silbak Premier Mines Ltd. Annual Report 1980 in 104B 054)
EMPR SUM RPT 1911, p. 54
GSC MEM 32, pp. 66,67; 132, p. 51
GSC P 89-1E, pp. 145-154
Christopher, P.A. (2009-08-03): Technical Report on the Premier Gold Project
Kirkham, G. (2012-06-18): Technical Report on the Resource Estimate for the Premier Gold Property
Kirkham, G. (2012-08-20): Revised Technical Report on the Resource Estimate for the Premier Gold Property
Puritch, E. (2013-03-27): Technical Report and Resource Estimate for the Big Missouri and Martha Ellen Deposits, Premier Gold Property
Rennie, D.W. (2018-06-22): Technical Report on the Premier-Dilworth Project
Rennie, D.W. (2019-01-17): Technical Report on the Premier Project
Bird, S.C., Meintjes, T. (2020-02-28): Resource Estimate Update for the Premier Gold Project, Stewart, British Columbia, Canada
Ascot Resources Limited (2020-05-22): Premier & Red Mountain Gold Project Feasibility Study NI 43-101 Technical Report, British Columbia

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