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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  04-Apr-2022 by Karl A. Flower (KAF)

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Name BENCH, COREY, FOX, OX, FOX - 14, FOX - 16 Mining Division Skeena
BCGS Map 104B048
Status Showing NTS Map 104B08W
Latitude 056º 29' 55'' UTM 09 (NAD 83)
Longitude 130º 29' 05'' Northing 6262550
Easting 408600
Commodities Zinc, Lead Deposit Types G06 : Noranda/Kuroko massive sulphide Cu-Pb-Zn
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The first recorded work on the Bench zone was a stream sediment sampling program carried out by Placer Dome in 1991. Follow up work was carried out by Kenrich and Ambergate in 1993 when 10,575 metres of rough-flagged grid was established in the general area. The grid was mapped at 1:5,000 and soil samples were collected at 25 metre intervals, with some infill at 12.5m intervals where anomalies were encountered. Five hand-dug and blasted trenches were excavated and a limited VLF-EM and ground magnetic survey was carried out. In 1994, Kenrich established an additional 1,200 metres of grid for an IP, VLF-EM and ground magnetic survey. Work on the Bench zone in 1995 consisted of collecting 376 soil samples at 25-metre intervals on lines spaced 100 metres apart, in addition to reconnaissance geologic mapping. In 1996, Kenrich Mining Corp. carried out detailed mapping, collected 105 rock samples, and drilled nine diamond drill holes totaling 1,384 metres.

During 1997, Homestake carried out check mapping of surface exposures and relogging of drill core for the Bench zone. Analytical work was carried out on 54 rock samples from the Bench zone as well as 20 samples from existing drill core. Homestake also drilled one diamond drill hole to a depth of 780.18m. No further work has been done on the Bench zone since 1997.

A north-plunging syncline was mapped through the center of the Bench zone. Mafic pillow lavas of the Early to Middle Jurassic Salmon River Formation (Hazelton Group) are exposed in the core of the syncline, followed outward by a band of undivided Salmon River Formation rocks, a band of Middle Jurassic Mount Dilworth Formation (Hazelton Group) rocks and ultimately a broad exposure of undivided Salmon River Formation rocks. Units observed include rhyolite flows, breccias, and tuffs in contact with argillites.

Little outcrop mineralization has been encountered at the Bench zone. Disseminated sphalerite, galena and pyrite was found in one location in sediments of the Troy Ridge member. Elsewhere, discontinuous disseminated to semi-massive lenses of pyrite and pyrrhotite have been locally observed along contacts between sediments (Troy Ridge member) and mafic volcanics (John Peaks member) in the eastern portion of the Bench zone. Up to 10 per cent disseminated pyrite and pyrrhotite are locally encountered within tuffaceous sediments throughout the area . No significant assays have been returned from any of these sulfide occurrences.

Kenrich-Eskay Mining Corp. has continued to explore its Corey prospects in 2004 to 2007.

See Cumberland (104B 011) for further details of the Corey property and a common work History.

EM EXPL 1997-15; 1998-28
EMPR AR 1961-116
EMPR BULL 58, *63
EMPR FIELDWORK 1988, pp. 241-250
EMPR OF 1989-10; 1999-2; 1999-14
EMPR PF (Geology Map-1:31,250 Scale-Newmont Exploration of Canada, 1960's; Kenrich Mining Corporation Website (May 1998, Nov. 1999): Corporate Profile, Bench Zone, 7 p.)
GSC MAP 9-1957; 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, Showing No. B54)
Equity Preservation Corp. Compilation: Stewart-Sulphurets-Iskut, Dec. 1988, (Showing No. B54)
Lindsay, D., Prowse, N.D. (2021-06-08): NI 43-101 Technical Report on the Sib-Corey-North Mitchell Property