MINFILE Mineral Inventory

MINFILE Record Summary

MINFILE No 104B 351

File Created:	29-Nov-1988	by	Dani J. Alldrick (DJA)
Last Edit:	24-Mar-2022	by	Nicole Barlow (NB)

SUMMARY

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		NMI
Name	GOLDEN MARMOT (SULPHURETS), WEASEL, DEBBIE, PTARMIGAN, SULPHURETS, BRUCEJACK, BRUCESIDE, GM	Mining Division	Skeena
		BCGS Map	104B049
Status	Prospect	NTS Map	104B08E
Latitude	056º 29' 32''	UTM	09 (NAD 83)
Longitude	130º 12' 20''	Northing	6261516
		Easting	425773
Commodities	Gold, Silver, Copper, Lead, Zinc	Deposit Types	I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt	Intermontane	Terrane	Stikine

Capsule Geology

A large hill covered in gossanous scree is a prominent feature 1000 metres north of the Goldwedge (104B 105) minesite. The hill has attracted sampling in the past, assays from sulphide-rich, oxidized scree samples returned low gold-silver values.

The rocks underlying the Golden Marmot are assigned to the Lower Jurassic Unuk River Formation of the Hazelton Group. The tuff had been deformed (stretched lapilli), weakly foliated, bleached (pale green colour) and flooded with carbonate and sericite alteration and trace very fine pyrite.

Sampling in 1988 focused on several crudely parallel quartz and carbonate-quartz veins that stick up as resistant spines through the scree and strike 160 degrees and dip 80 degrees northeast. From northeast to southwest the veins were named: Ptarmigan, Golden Marmot, Weasel and Debbie (Assessment Report 18564). The veins are either massive quartz or massive carbonate (calcite) with minor quartz nodules and seams. The veins usually host only minor visible sulphides; mainly pyrite but locally some medium-grained tetrahedrite and galena/sphalerite. Polybasite, arsenopyrite, chalcopyrite, molybdenite have also been reported (Assessment Report 21884).

Surface chip samples from the zone assayed as high as 32.78 grams per tonne gold and 120.69 grams per tonne silver over 2.5 metres. Trench samples assayed as high as 165.05 grams per tonne gold and 120.69 grams per tonne silver over 3.0 metres (Northern Miner, Oct. 17, 1988).

By 1991, seven gold-silver veins had been reported. In this year 400 metres of backhoe trenching had been done and 474 rock chip samples had been collected (Assessment Report 21884).

The diamond-drill hole on the Golden Marmot vein reached 125 metres and intersected a narrow, low-grade vein at depth. The diamond-drill hole on the Ptarmigan vein was about 192 metres deep and intersected two quartz vein structures. The country rock was massive andesitic lapilli tuff throughout.

In 2011, drilling yielded from 0.30 gram per tonne gold and 80.4 grams per tonne silver over 33.0 metres in hole SU-218 to 2.78 grams per tonne gold and 10.0 grams per tonne silver over 17.3 metres in hole SU-197 (Ghaffari, H. (2012-02-20): Technical Report and Updated Preliminary Economic Assessment of the Brucejack Project).

Refer to West (104B 193) for details of the work history of the Sulphurets-Brucejack property which encompasses this occurrence.

Bibliography

EMPR ASS RPT *18564, *21884, 36214, 39314

EMPR FIELDWORK 1987, pp. 199-209

EMPR OF 1988-4

EMPR PF (Bridge, D.A., Ferguson, L.J., and Brown, M.G., (1981): 1980 Exploration Report on the Sulphurets Property for Esso Minerals Canada Ltd. (unpublished); Bridge, D., and Melnyk, W., (1982): 1981 Exploration Report on the Sulphurets Property for Esso Minerals Canada Ltd. (unpublished); Bridge, D., and Melnyk, W., (1983): 1982 Exploration Report on the Sulphurets Property for Esso Minerals Canada Ltd. (unpublished); Britten, R.M., (1983): Regional Geological Assessment of the Stewart-Sulphurets Area, and Geology and Alteration of the Sulphurets Prospect Area for Esso Minerals Canada Ltd. (unpublished); Lomenda, M.G., (1983): Geology, Alteration and Mineralization of the Mitchell-Sulphurets Ridge and Snowfields Gold zone, Sulphurets Property for Esso Minerals Canada Ltd. (unpublished); Melnyk, W., (1983): 1983 Canada Ltd. (unpublished); Geology Map - 1:31,250 scale, Newmont Exploration of Canada Ltd., 1960's; Newhawk Gold Mines Ltd., Press Release *Oct. 6, 1988)

GSC MAP 9-1957; 1418A

GSC P 89-1E, pp. 145-154

N MINER *Oct.17, 1988

Kirkham, R.V., (1963): The Geology and Mineral Deposits in the Vicinity of the Mitchell and Sulphurets Glaciers, M.Sc. Thesis, University of British Columbia

Simpson, T.M., (1983): The Geology and Hydrothermal Alteration of the Sulphurets Deposits, Northwest British Columbia, M.Sc. Thesis, University of Idaho

Armstrong, T.A. (2010-01-14): Technical Report and Resource Estimates on the West, Bridge, Galena Hill, Shore, SG & Gossan Hill Gold & Silver Zones of the Brucejack Property

Ghaffari, H. (2010-09-10): Technical Report and Preliminary Assessment of the Snowfield-Brucejack Project

Ghaffari, H. (2010-10-28): Technical Report and Preliminary Assessment of the Snowfield-Brucejack Project

Armstrong, T.A. (2011-03-04): Technical Report and Updated Resource Estimate on the Brucejack Property

Armstrong, T.A. (2011-04-04): Technical Report and Updated Resource Estimate on the Snowfield-Brucejack Property

Ghaffari, H. (2011-06-03): Technical Report and Preliminary Economic Assessment of the Brucejack Project

Armstrong, T.A. (2012-01-12): Technical Report and Resource Estimate on the Brucejack Property

*Ghaffari, H. (2012-02-20): Technical Report and Updated Preliminary Economic Assessment of the Brucejack Project

Jones, I. (2019-04-04): Technical Report on the Brucejack Gold Mine

Pretium Resources Inc. (2020-03-09): Technical Report on the Brucejack Gold Mine, Northwest British Columbia

EMPR PFD 903720, 802722, 802725, 802726, 802729, 802738, 802975, 803138, 803196, 803209, 803217, 803229, 803410, 803412, 803432, 803577, 803660, 803672, 803676, 803718, 803720, 803730, 803785, 803821, 803840, 803841, 804018, 804028, 804052, 804116, 804200, 804214, 804252, 804260, 804267, 804284, 803926, 803947, 803975, 804033, 804064, 804089, 804090, 804091, 804092, 804106, 804112, 503017