|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Turk Creek is a small tributary of Cherry Creek. Two separate areas with placer workings are present on Turk Creek; the first extends 500 feet upstream from the mouth of the creek, and the second area starts at the forks about a mile above its mouth and extends about 1,500 feet up the south fork of Turk Creek. The coordinates are the approximate midpoint of the upper placer workings on the south fork of Turk Creek, in section 17, T. 26 N., R. 22 E., of the Copper River Meridian. The location is accurate.|
The rocks in the vicinity of Turk Creek are Paleozoic amphibolite-facies gneiss, schist, and amphibolite, and minor marble (Foster, 1969 [B 1271-G]). Bedrock along the north fork of Turk Creek largely consists of metagabbro; bedrock along the south fork of Turk Creek is serpentinized ultramafic rocks (R.L. Flynn, unpub. data, 2000). Sparse rocks comprised largely of chromite grains as large as 5 millimeters in diameter occur as float in the south fork of Turk Creek (R.L. Flynn, unpublished data, 2000); they may be derived from the large serpentinized ultramafic body in the headwaters of Turk Creek (see EA161). Placer gold in Turk Creek has a fineness of 815 parts of gold per thousand (Metz and Hawkins, 1981).Prospecting for placer gold occurred on Turk Creek in 1954 (Alaska Department of Mines, 1955). Small open-cut mines were active on Turk Creek from 1983 to 1994 and in 1999 and 2000 (Yeend, 1996; Norm LaFramboise, Boundary Explorations, Inc., written communication, 2000).
|Geologic map unit||(-141.130962882446, 64.0359883124469)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Prospecting for placer gold occurred on Turk Creek in 1954 (Alaska Department of Mines, 1955). Small open-cut mines were active on Turk Creek from 1983 to 1994 and in 1999 and 2000 (Yeend, 1996; Norm LaFramboise, Boundary Explorations, Inc., written communication, 2000).|
|Indication of production||Yes; small|
|Production notes||Placer gold in Turk Creek has a fineness value of 815 parts gold per thousand (Metz and Hawkins, 1981).|
Alaska Department of Mines, 1955, Report of the Commissioner of Mines for the biennium ended December 31, 1954: Alaska Department of Mines, 110 p.
Asher, R.R., 1970, Geochemistry and geology, Boundary area, Fortymile district, Eagle A-1 quadrangle, Alaska: Alaska Division of Mines and Geology Geochemical Report 23, 32 p., 2 sheets, scale 1:63,360.
Foster, H.L., 1969, Reconnaissance geology of the Eagle A-1 and A-2 quadrangles, Alaska: U.S. Geological Survey Bulletin 1271-G, p. G1-G30
Metz, P.A., and Hawkins, D.B., 1981, A summary of gold fineness values from Alaska placer deposits: Fairbanks, University of Alaska Mineral Research Laboratory Report No. 45, 63 p.
|Reporters||R.L. Flynn; M.B. Werdon|
|Last report date||5/1/2002|