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File Created: 13-Aug-2012 by Garry J. Payie (GJP)
Last Edit:  10-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

Name SMC, SKYLINE, REG Mining Division Liard
BCGS Map 104B065
Status Prospect NTS Map 104B11E
Latitude 056º 39' 00'' UTM 09 (NAD 83)
Longitude 131º 07' 22'' Northing 6280450
Easting 369850
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types G06 : Noranda/Kuroko massive sulphide Cu-Pb-Zn
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Insular Terrane Stikine
Capsule Geology

Three stratigraphic assemblages have been mapped in the area: (1) Upper Palaeozoic sediments and volcanics of the Stikine Assemblage, (2) clastic sediments of the Triassic Stuhini Group, and (3) Lower Jurassic sediments and volcanics of the Hazelton Group.

Four plutonic suites intrude the above; (1) Late Triassic calc-alkaline intrusions coeval with Stuhini Group stratigraphy, (2) Jurassic Copper Mountain, (3) Jurassic Texas Creek and (4) Tertiary Coast Plutonic suite.

Mineralization at the SMC prospect occurs as volcanogenic massive sulphide but is also shear-hosted (Assessment Report 29673). Mineralization has been traced over a 160 metres strike length in the trenches and follows a north-northwest trend. Rock types described include intermediate to felsic tuffs to lapilli tuffs within more extensive wackes and siltstones. Massive sulphides are well laminated within the tuffs. Sphalerite and pyrite are the dominant sulphides with lesser galena and chalcopyrite. Sulphides also occur as veinlets within brecciated felsic tuff subparallel to foliation/bedding. Silicification is strong where metal grades are highest. Foliation and shearing attitudes are highly variable but drilling shows bedding and mineralization to be dipping moderately northeast.

At the SMC showing, silicified structures grade up to 14.7 grams per tonne gold, 16.4 grams per tonne silver and 1 per cent lead and zinc over 1 metre (Assessment Report 28103).

Work History

The SMC Showing was discovered in 1988 during construction of the road leading from Bronson Airstrip to the Johnny Mountain mine. A single drill hole was completed at that time. Showing exposures were increased in size by four back-hoe trenches. Twelve diamond drill holes were completed on a very tight grid along 40 metres of strike length in 1991. Drill results yielded many mineralized sections with grades similar to the trench samples and with better grades. One hundred and twenty-five channel samples were collected by Adrian Resources Ltd in 1991 by making two cuts about 5 centimetres apart with a carbide blade across outcrops and chiselling out the intervening rock. A single diamond drillhole directed beneath the SMC structure by Spirit Bear Minerals in 2007 failed to show continuity of mineralization to depth, probably as a result of fault complications.

Refer to Johnny Mountain (MINFILE 104B 107) for related details and common property work history.

EMPR FIELDWORK 1989, p. 123
EMPR GM 1997-03
EMPR OF 1989-10; 1990-16; 1994-1; 1992-1; 1992-3; 1998-10
EMPR PF (Grove, E.W., (1986): Geological Report, Exploration and Development Proposal for Skyline Exploration Ltd., Reg Property, Apr.20, 1986; Grove, E.W., (1987): Stonehouse Gold Deposit Reg Property of Skyline Explorations Ltd., Sept.15, 1987 in Canadian Institute of Mining and Metallurgy, Eleventh District 6 Meeting, Vancouver, British Columbia, Oct.29-31, 1987; Refer to Stonehouse, 104B 107)
GSC MAP 9-1957; 311A; 1418A
GSC P 89-1E, pp. 145-154
Anderson, R.G., (1988): A Paleozoic and Mesozoic Stratigraphic and Plutonic Framework for the Iskut Map area (104B), Northwestern British Columbia, pp. A1-A5, in Geology and Metallogeny of North- western British Columbia, Smithers Exploration Group, G.A.C. Cordilleran Section Workshop, October 16-19, 1988
Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property with Special Reference to Johnny Flats & Burnie Trend Targets
Placer Dome File