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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  10-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI 104B11 Cu1
BCGS Map 104B065
Status Prospect NTS Map 104B11E
Latitude 056º 39' 02'' UTM 09 (NAD 83)
Longitude 131º 03' 37'' Northing 6280386
Easting 373683
Commodities Silver, Zinc, Lead, Gold, Copper Deposit Types I02 : Intrusion-related Au pyrrhotite veins
G07 : Subaqueous hot spring Ag-Au
Tectonic Belt Insular Terrane Stikine
Capsule Geology

The Bonanza zone covers the ten crown-granted mineral claims that parallel Bronson Creek just north of the Stonehouse Gold deposit (104B 107). The showings within this zone are comprised of stratabound pyrite, pyrrhotite, chalcopyrite, sphalerite, galena, plus tetra- hedrite replacement mineralization which shows evidence of sulphide remobilization into secondary fractures and kink folds. Host rocks consist mainly of an Upper Triassic to Lower Jurassic sedimentary/ volcanic sequence which has been correlated with the Hazelton Group, Unuk River Formation. Some of these stratified rocks may be cor- related with upper members of the Stuhini Gorup. The stratified Jurassic-Triassic rocks are intruded by intermediate to felsic stocks and plutons of Jurassic and younger age that are related to the Coast Plutonic Complex.

Near the showings, shears cut sharply across the folded sedi- mentary sequence at about 110 degrees and dip about 45 degrees to the west. Alteration includes sericitization, carbonatization, silicifi- cation and pyritization which together have produced a bleached en- velope in the otherwise dark sediments. Between 1914 and 1917, about one tonne of ore was shipped from the showings which produced about 2.0 grams per tonne gold, 1515.4 grams per tonne silver and 12.45 per cent copper (Minister of Mines, Annual Report 1917, page 74). Traces of argentite were reported to occur with the sulphides (Minister of Mines, Annual Report 1919, page 83).

Grab samples taken from these showings in 1984 to 1986 have assayed as high as 14.1 per cent copper, 13903 grams per tonne silver and 98.7 grams per tonne gold. The overall results from trenching in- dicate a large tonnage that would grade about 0.7 per cent copper, 0.6 per cent lead, 3.5 per cent zinc, 127.0 grams per tonne silver and about 1.9 grams per tonne gold (Grove, 1987). The showings are ex- tremely high in silver relative to base metal concentrations and host exceedingly rich, discontinuous ore pockets.

Work along Bronson Creek suggests that the Bonanza zone sulphide mineralization is confined strong, through going shears cutting sharply across the folded sedimentary rocks. Three parallel shears have been investigated and found to trend uniformly at about 110 degrees, dipping 45 degrees west. Each of these shears is marked by sericite, calcite, quartz and sulphide alteration and replacement (Grove, 1987).

During 2009 through 2011, Skyline Gold Corp. completed programs of prospecting, geochemical (rock and soil) sampling, trenching, airborne and ground geophysical surveys and 23 diamond drill holes, totalling 5676 metres, on the area as the Iskut property.

EMPR AR 1914-512; *1917-74; *1919-83; 1968-41
EMPR ASS RPT 630, 769, 5275, 9090, 10510, 13674
EMPR EXPL 1980-470; 1983-524; 1984-387; 1985-C381-382
EMPR GEM 1972-518; 1973-501
EMPR INF CIRC 1997-1, p. 7
EMPR PF (Grove, E.W. (1986): *Geological Report, Exploration and
Development Proposal on the Skyline Explorations Ltd., Reg
Property, April 20, 1986; (1987): Stonehouse Gold Deposit, Reg
Property of Skyline Explorations Ltd., September 15, 1987 in
Canadian Institute of Mining and Metallurgy, Eleventh District 6
Vancouver, B.C., October 29-31, 1987; Refer to Stonehouse - 104B
GSC MAP 9-1957; 1418A
GSC MEM 246, p. 72
GSC P 89-1E, pp. 145-154
GCNL #156,#210, 1984; #63,#79,#99,May 5, 1987; #47,#76, 1988
MINING REVIEW Sept/Oct 1988, pp. 38-43
N MINER Nov.3,7, 1986; May 4,11, 1987; Mar.,Jan., 1988
NAGMIN Jun.7, 1985
PR REL (Skyline Explorations Ltd.: Oct.24,25, 1985; Sept.4,Aug.15,
1986, Development-Reg Property, 1986; Jan.,May 15, Annual Report
1987; McDermid St. Lawrence Ltd.: May, 1987; E.W. Grove Consult-
ants Ltd., Reg Property, Apr.20, 1986)
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
Equity Preservation Corp. Compilation: Stewart-Sulphurets-Iskut,
Dec. 1988, (Showing No. B23)
Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property
with Special Reference to Johnny Flats & Burnie Trend Targets
Placer Dome File