|Quadrangle map, 1:250,000-scale||EA|
|Quadrangle map, 1:63,360-scale||D-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Placer Creek is a small tributary on the north side of the Seventymile River; Placer Creek is also known as Pleasant Creek. The location of placer mining on Placer Creek is uncertain; the coordinates are arbitrarily placed near the mouth of the creek, in section 27. T. 2 N., R. 28 E., of the Fairbanks Meridian. The location is accurate within 1.5 miles. Placer Creek is locality 48 of Eberlein and others (1977).|
The rocks along the southwest side of Placer Creek are Paleozoic quartz-mica schist and greenschist; Upper Cretaceous to Pliocene terrigenous sedimentary rocks are exposed on the northeast side of the creek (Foster, 1976). The two units are separated by the Tintina Fault, along which Placer Creek runs.Bench gravels on Placer Creek were reported to carry gold, and there was an unsuccessful attempt at mining a bench gravel deposit in 1912 (Ellsworth and Parker, 1911; Ellsworth and Davenport, 1913). Placer Creek was mined in 1914 (Brooks, 1915). Placer gold has been produced downstream of Placer Creek on the Seventymile River (see EA025).
|Geologic map unit||(-142.012931518734, 64.9777812075364)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Bench gravels on Placer Creek were reported to carry gold, and there was an unsuccessful attempt at mining a bench gravel deposit in 1912 (Ellsworth and Parker, 1911; Ellsworth and Davenport, 1913). Placer Creek was mined in 1914 (Brooks, 1915).|
|Indication of production||Undetermined|
Brooks, A.H., 1915, Mineral resources of Alaska; report on progress of investigations in 1914: U.S. Geological Survey Bulletin 622, 380 p.
Cobb, E.H., 1977, Summary of references to mineral occurrences in the Eagle quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-845, 122 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Ellsworth, C.E., and Davenport, R.W., 1913, Placer mining in the Yukon-Tanana region: U.S. Geological Survey Bulletin 542-F, p. 203-222.
|Reporters||R.L. Flynn; M.B. Werdon|
|Last report date||5/1/2002|