|Quadrangle map, 1:250,000-scale||ID|
|Quadrangle map, 1:63,360-scale||A-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This gold placer extends for a mile or more along Little Creek, a north-flowing tributary of the Iditarod River. The coordinates are at the center of the deposit which is at an elevation of about 400 feet, about 0.6 mile south-southeast of the center of section 6, T. 23 N., R. 52 W., of the Seward Meridian. Little Creek is locality 15 of Cobb (1972 [MF 363]); also described in Cobb (1976 [OFR 76-576]).|
Geologic descriptionThe Little Creek Mine is a placer gold-cinnabar deposit in a short tributary of the Iditarod River. The placer is a shallow deposit with 10 to 16 feet of gravel that is overlain by 3 to 10 feet of overburden. The deposit occurs entirely in the modern flood plain of Little Creek; no terrace deposits have been identified. The rocks in upper end of the placer are sandstone of the Upper Cretaceous, Kuskokwim Group. The lower part of the placer is underlain by the Iditarod volcanics (Miller and Bundtzen, 1994). The principal heavy minerals are fine-grained gold and locally abundant cinnabar, The gravels also contain abundant rounded fragments of vein quartz (Cady and others, 1955). Some gold has been mined during the exploration of the deposit, but there has been no mechanized mining on a significant scale (Spencer Lyman, oral communication, 1986; Morris Hofseth, oral communication, 1990).
|Geologic map unit||(-158.692155485277, 62.0174607711528)|
|Mineral deposit model||Placer Au deposit (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Probably Quaternary.|
|Workings or exploration||Placer gold was discovered on Little Creek in 1910 (Maddren, 1911). According to Maddren (1915), gravel from holes sunk to bedrock contained 1 or 2 cents in gold per bedrock foot but there had been no production. According to Cady and others (1955), test shafts were sunk about 13 feet to bedrock. Cady reported that samples assayed from a few cents to $1.00 per bedrock foot and that the grade of the deposit is consistent.|
|Indication of production||Yes; small|
|Production notes||Production may have occurred during exploration but there has never been any major mechanized mining on Little Creek (Spencer Lyman, oral communication, 1986; Morris Hofseth, oral communication, 1990).|
Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Iditarod quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-363, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction material) in the Iditarod and Ophir quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-576, 101 p.
Maddren, A.G., 1911, Gold placer mining developments in the Innoko-Iditarod region: U.S. Geological Survey Bulletin 480-I, p. 236-270.
Maddren, A.G., 1915, Gold placers of the lower Kuskokwim, with a note on copper in the Russian Mountains: U.S. Geological Survey Bulletin 622-H, p. 292-360.
Miller, M.L., and Bundtzen, T.K., 1994, Generalized geologic map of the Iditarod quadrangle, Alaska showing potassium-argon, major oxide, trace element, fossil, paleocurrent, and archeological sample localities: U.S. Geological Survey Miscellaneous Field Studies Map MF-2219-A, 48 pages; 1 sheet, scale 1:250,000.
|Reporters||T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group)|
|Last report date||5/25/2003|