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File Created: 10-Aug-2020 by Karl A. Flower (KAF)
Last Edit:  10-Aug-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name STAIRWAY, UPPER STAIR WAY, LOWER STAIRWAY, LADDER CREEK Mining Division Liard
BCGS Map 104B065
Status Showing NTS Map 104B11E
Latitude 056º 38' 36'' UTM 09 (NAD 83)
Longitude 131º 01' 45'' Northing 6279540
Easting 375561
Commodities Gold, Silver, Copper, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Insular Terrane Stikine
Capsule Geology

The Stairway occurrence is located at an elevation of approximately 840 metres on or near a northeast flowing tributary of Bronson Creek and approximately 5.1 southeast of the junction of Bronson Creek and the Iskut River.

The area is underlain by a sequence of folded and faulted andesitic volcanic and clastic sedimentary rock units of the Upper Triassic Stuhini Group and andesitic volcanic rocks of the Lower Jurassic Hazelton Group. The sequences of clastic layered rocks consist of volcanic wackes, andesitic flows, and argillite interbeds. The sedimentary and volcanic rocks have been intruded by monzodioritic to gabbroic rocks of the Triassic to Jurassic Iskut River (Bronson) Stock.

Locally, mineralized veins are reported at the Upper and Lower Stairway zones and the nearby Ladder Creek zone.

In 2011, a chip sample (SP11-8-30-6) from a trench on the Upper Stairway zone assayed 9.88 grams per tonne gold and 259 grams per tonne silver over 0.20 metre, while three other 0.20 metre long chip samples (SP11-8-30-1, -2 and -8) from trenches on the Upper and Lower Stairway zones yielded from 2.14 to 2.99 grams per tonne gold, 164 to 370 grams per tonne silver, 0.01 to 8.42 per cent copper, 0.03 to 0.19 per cent lead and 0.01 to 2.64 per cent zinc (Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property with Special Reference to Johnny Flats & Burnie Trend Target). Also, at this time a rock sample from the Ladder Creek zone assayed 1.2 grams per tonne gold and 6.5 grams per tonne silver (Burgoyne, A.A. (2012-05-07): Technical Report on The Iskut Property with Special Reference to Johnny Flats & Burnie Trend Target).

Work History

The area has been explored in conjunction with the nearby Bronson Slope (MINFILE 104B 077) occurrence and a complete regional exploration history can be found there.

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.

Bibliography
EMPR BULL 63
EMPR FIELDWORK 1989, p. 123
EMPR GM 1997-03
EMPR OF 1989-10; 1990-16; 1994-1; 1992-1; 1992-3; 1998-10
GSC MAP 9-1957; 311A; 1418A
GSC MEM 246
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 Target

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