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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  28-Dec-1988 by Dorthe E. Jakobsen (DEJ)

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NMI
Name DALY - ALASKA (LOWER), NEW ALASKA, ELEVENMILE Mining Division Alaska, USA
BCGS Map 104B010
Status Showing NTS Map 104B01E
Latitude 056º 01' 54'' UTM 09 (NAD 83)
Longitude 130º 02' 39'' Northing 6210096
Easting 434932
Commodities Gold, Silver, Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Daly-Alaska (Lower) workings are located near the junction of Salmon River and Daly Creek in southeastern 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 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 plutonic suite of dacitic porphyry dykes and sills, Eocene granitic Hyder intrusives and lamprophyre dykes.

Two open cuts expose a mineralized vein in silicified country rock. The vein is 0.9 metre wide, strikes 100 degrees and dips 60 degrees south. Mineralization consists of stringers of fine granular galena, pyrrhotite, sphalerite, chalcopyrite, pyrite and arsenopyrite with some mineralized calcite and quartz veinlets. The sulphides com- prise 20 per cent of the vein. The vein is reported to assay 1028.4 to 1371.2 grams per tonne silver (United States Geological Survey Bulletin 807).

An open cut on the same zone, 3.0 metres above, consists of pyrite with local sphalerite stringers that reportedly assay high in gold.

Above the Elevenmile camp similar mineralization occurs in altered metavolcanics. The mineralization consists of pyrrhotite, sphalerite, pyrite, galena, tetrahedrite (some as freibergite) and chalcopyrite. A fault cut in a tunnel reportedly had a small amount of associated silver. Selected samples are reported to contain as much as 17,140 grams per tonne silver (United States Geological Survey Bulletin 807).

Bibliography
EMPR AR 1923-A87
EMPR BULL 58; 63
EMPR FIELDWORK 1983, pp. 149-165; 1984, pp. 316-342; 1985, pp. 217-219
EMPR OF 1987-22
EMPR REGIONAL PF (Mineral Terranes of Alaska, 1982 Plate F; Sutherland-Brown, A., (1951): Cordilleran Structure in Canada and Alaska)
CIM Spec. Vol. 8, pp. 149-170,215-229
GSC MEM 175
GSC P 89-1E, pp. 145-154
CJES VOL 10, Part 1, 1973, pp. 408-420
USGS BULL 722; 800; *807-86,88; 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)

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