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

Summary Help Help

NMI
Name CRIPPLE CREEK Mining Division Alaska, USA
BCGS Map 104B010
Status Showing NTS Map 104B01E
Latitude 056º 01' 25'' UTM 09 (NAD 83)
Longitude 130º 04' 08'' Northing 6209223
Easting 433378
Commodities Lead, Zinc, Copper Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Cripple Creek property is located on the east side of the Salmon river road below the Salmon River bridge at Tenmile in south- eastern 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 se- quence of argillite and siltstone infolded along a synclinal axis. The sequence is intruded by the Early Jurassic Texas Creek grano- diorite, Eocene granitic Hyder intrusives and lamprophyre dykes.

There are several showings on the property. Beside the road, a 14.0 metre adit has been driven along a vein consisting of a sheeted zone 3.0 to 4.6 metres wide with quartz stringers and a vein up to 1.0 metre wide in the footwall. One quartz stringer is mineralized with galena, sphalerite and minor pyrite and locally tetrahedrite. Quartz, 2.5 metres thick on the south side of the portal, is locally mineralized with sparse pockets of galena. The country rock is sheared Texas Creek granodiorite containing disseminated pyrite. At 4.6 metres above the adit a 30 to 60 centimetre wide quartz vein and stringers are exposed for 20 metres. The quartz vein strikes 107 degrees and dips steeply north. One stringer, 5.0 centimetres wide, is heavily mineralized with galena, pyrite and sparse chalcopyrite.

Uphill from the adit (53 metres) an open cut also exposes a quartz vein.

There are two other mineralized showings consisting of stringers and stockwork veins containing disseminated galena, sphalerite and pyrite.

Bibliography
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)
GSC MEM 175
GSC P 89-1E, pp. 145-154
CIM Spec. Vol. 8, pp. 149-170,215-229
CJES VOL 10, Part 1, 1973, pp. 408-420
USGS BULL 722; 800; *807-83,84; 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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