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File Created: 13-Jul-88 by Larry Jones(LDJ)
Last Edit:  21-Jun-16 by Laura deGroot(LDG)

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NMI
Name TAU, UPPER TAU, KLINE Mining Division Alaska, USA
BCGS Map 104B010
Status Showing NTS Map 104B01E
Latitude 56º 00' 57" N UTM 09 (NAD 83)
Longitude 130º 02' 31" W Northing 6208332
Easting 435044
Commodities Gold, Copper Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Upper Tau showing is located 500 metres west of Skookum Lake, 13 kilometres north of Hyder, Alaska.

Located in the Intermontane Belt, the area, bounded on the west by the Coast Crystalline Complex and on the east by the Bowser Basin, is part of the volcanic arc assemblage of the Stikinia Terrane. The showing is hosted by the Upper Triassic to Lower Jurassic Hazelton Group, Unuk River Formation metavolcanics. The Hazelton Group is a northwest trending steeply east dipping belt of folded andesitic lapilli tuffs, flows and breccia containing a thick sequence of argillite and siltstone infolded along a synclinal axis. The sequence is intruded by the Early Jurassic Texas Creek granodiorite, Eocene granitic Hyder intrusives and lamprophyre dykes.

This occurrence is most likely associated with mineralization at the Alaska-Premier (104B 064) workings located 1.2 kilometres north of this showing. A sample from a tuff xenolith in a Texas Creek granodiorite dyke contains pyrite, arsenopyrite and minor pyrrhotite and chalcopyrite. This sample assayed 0.48 grams per tonne gold over 1.5 metres (Houston Oil and Minerals Corp., 1979).

Bibliography
EMPR BULL 58; 63
EMPR FIELDWORK 1983, pp. 149-165; 1984, pp. 316-342; 1985, pp. 217-
219
EMPR OF 1987-22
EMPR PF (*Kretschmar, D. (1979): Report and Map, Houston Oil and Minerals Corp., in 104B 064)
EMPR REGIONAL PF (Mineral Terranes of Alaska, 1982 Plate F;
GSC MEM 175
GSC P 89-1E, pp. 145-154
CIMM SPEC VOL #8, pp. 149-170, pp. 215-229
CJES VOL 10, Part 1, 1973, pp. 408-420
USGS BULL 722; 800; *807-85,86; *1024-140; 1425
Brown, D.A. (1987): Geological Setting of the Volcanic-Hosted Silbak
Premier Mine, Northwestern British Columbia, M.Sc. Thesis,
University of British Columbia (in Property File 104B 054)
Sutherland-Brown, A., (1951): Cordilleran Structure in Canada and
Alaska)

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