|Quadrangle map, 1:250,000-scale||NL|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This placer prospect is located along Colorado Creek, a southeast-flowing tributary to California creek. It is in sec. 31, T. 15 S., R. 6 E, Kateel River Meridian. The location is accurate within 1 mile. This prospect is locality 3 of Cobb (1972 [MF 423]), who mistakenly identified it as Camp Creek.|
The area of Colorado Creek is underlain mainly by pelitic schist, phyllite, slate, sheared chert, quartzite, and some areas of recrystallized limestone (Mertie, 1937; Cass, 1959; Patton and Moll-Stalcup, 2000). Colorado Creek drains the granite or granodiorite Khotol pluton (Cass, 1959; Patton and Moll-Stalcup, 2000). That pluton has been dated by K-Ar and Ar/Ar techniques at 108-112 Ma (Flanigan, 1998).Placer prospecting on Colorado Creek took place before and during 1909 (Maddren, 1910). In 1934, Mertie (1937) panned gold at this site. There is no record of any further prospecting or mining.
|Geologic map unit||(-157.762440673582, 64.1393488075275)|
|Mineral deposit model||Placer gold (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Placer prospecting on Colorado Creek took place before and during 1909 (Maddren, 1910). In 1934, Mertie (1937) panned gold at this site. There is no record of any further prospecting or mining.|
|Indication of production||Undetermined|
Cass, J.T., 1959, Reconnaissance geologic map of the Nulato quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-291, 1 sheet, scale 1:250,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Nulato quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-423, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p.
Flanigan, B., 1998, Genesis and mineralization of ore deposits in the Illinois Creek region, west central Alaska: University of Alaska, Fairbanks, M.Sc. thesis, 125 p., 2 plates.
Maddren, A.G., 1910, The Innoko gold-placer district, Alaska, with accounts of the central Kuskokwim valley and the Ruby Creek and Gold Hill placers: U.S. Geological Survey Bulletin 410, 87 p.
Mertie, J.B., Jr., 1937, The Kaiyuh Hills, Alaska: U.S. Geological Survey Bulletin 868-D, p. 145-177.
|Reporters||C.E. Cameron (Northern Associates Inc.)|
|Last report date||8/7/2001|