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File Created: 13-Oct-1988 by Laura L. Duffett (LLD)
Last Edit:  10-May-2017 by Jessica Norris (JRN)

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Name CENTRAL STU 2, STU 2, KESTRAL, RIDGE, BEAR Mining Division Liard
BCGS Map 104B066
Status Showing NTS Map 104B10W
Latitude 056º 38' 22'' UTM 09 (NAD 83)
Longitude 130º 54' 04'' Northing 6278868
Easting 383405
Commodities Gold, Copper, Silver, Arsenic Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Central Stu 2 occurrence is located in northwest British Columbia, approximately 96 kilometres northwest of Stewart.

The Central Stu 2 zone is underlain by a sequence of folded and faulted Upper Triassic andesitic volcanic and clastic sedimentary rock units of the Stuhini Group. The sequences of clastic layered rocks consist of volcanic wackes, andesitic flows, and argillite interbeds.

On the property, limestone is the oldest unit which is successively overlain by an argillite/siltstone/greywacke sequence which in turn is overlain by an andesite agglomerate unit. Feldspar porphyry and andesite dikes cut both the argillite/siltstone/greywacke and agglomerate.

In the central part of the Stu 2 claim, grey, massive, sometimes recrystallized limestone forms an east-west trending wedge which is possibly in fault contact with the argillite/siltstone/greywacke sequence. This sedimentary sequence is bedded, fine-grained, black and is often silicified and strongly fractured. The sequence hosts known mineralization in areas of feldspar-porphyry and andesite diking (refer to Billy Goat Bowl Zone, 104B 310).

In the southeast, Central Stu 2 Zone mineralization is related to the intrusion of andesite and feldspar-porphyry dikes. The andesite dikes vary from 0.5 to 1.0 metre in width and often occur in swarms. The feldspar-porphyry dikes range from 2 to 4 metres in width.

Pyritic sulphide veins occur immediately adjacent to several andesite dikes. The dikes and veins have a general east-west trend and dip steeply to the south with individual widths ranging up to 30 to 40 centimetres across. A 0.5 metre wide sample from one of these mineralized veins assayed 11.725 grams per tonne gold, 29.14 grams per tonne silver, 0.425 per cent copper and 3.867 per cent arsenic. Another 0.5 metre sample assayed 12.136 grams per tonne gold, 19.885 grams per tonne silver, 0.457 per cent copper and 4.339 per cent arsenic (Assessment Report 16930).

Toward the east part of the Central Stu 2, narrow auriferous quartz vein stringers with galena, sphalerite and chalcopyrite are hosted within andesite agglomerate and in close proximity to feldspar porphyry diking. In 1987, a 0.03 metre sample assayed 68.98 grams per tonne gold, 38.056 grams per tonne silver, 0.11 per cent copper, 1.49 per cent zinc and 1.19 per cent lead (Assessment Report 16930).

Work History

In 1989 detailed geological surveying by Kestrel Resources was directed towards identifying and evaluating the geologic settings of the Billy Goat Bowl, Central STU 2 and Magnetite Zones. Since the Billy Goat Bowl Zone has restricted access it was mapped separately from the other two zones which occur along the southern ridge of Zappa Creek. The two latter zones are collectively referred in this report as the "Ridge" Zone since they are indistinguishable.

See Magnetite (Stu)(MINFILE 104B 313) for related details and a common work History.

Rock sampling of the Billy Goat Bowl, Central Stu 2, and Magnetite (Stu) area in 2014 by Colorado Resources Ltd. reported negligible gold values, however the approximately 60 samples taken average around 0.5 per cent copper (Assessment Report 35184).

EMPR ASS RPT 9189, 10363, 11304, *17127, *20495, 22188, 35184
EMPR FIELDWORK 2015-1, pp. 41-58
EMPR GM 1997-03
EMPR OF 1990-16; 1994-1
GSC MAP 9-1957; 311A; 1418A
GSC P 89-1E, pp. 145-154
NW PROSPECTOR Aug./Sept., 1988
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 Northwestern British Columbia, Smithers Exploration Group, G.A.C. Cordilleran Section Workshop, October 16-19, 1988
Prime Capital Corporation, Iskut River Gold Camp Poster, July 1988