|Quadrangle map, 1:250,000-scale||OP|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Ester Creek is a short, west-flowing tributary to Dollar Creek, which is a headwater tributary to Beaver Creek. The coordinates are for the mine symbol marked on the U.S. Geological Survey Ophir A-2 topographic map (1954, minor revisions 1965). The symbol is near the midpoint of Ester Creek, in the SE1/4 sec. 29, T. 28 S., R. 12 E., Kateel River Meridian. Ester Creek is locality 11 of Cobb (1972 [MF 367]).|
The drainage area of Ester Creek is underlain by undivided Cretaceous clastic rocks. The headwaters also drain several small, Cretaceous or Tertiary dikes and subvolcanic plutons (Chapman and others, 1985).
The gold in Ester Creek is 841 fine according to Metz and Hawkins (1981). Mertie (1936) reports a fineness of 836 gold and 156 parts silver. Gold was being mined in 1926, and it was probably mined earlier (Holzheimer, 1926 [MR 64-1)]. Mertie (1936) reports mining in 1933, and Bundtzen and others (1987) indicate mining sometime during the 1980s.
Production from Ester Creek between the early 1900s to 1964 was 1,110 ounces of gold and 210 ounces of silver. Production figures for Ester Creek from 1980 to 1986 are unavailable (Bundtzen and others, 1987).Also see OP028.
|Geologic map unit||(-156.608363836671, 63.0294674787428)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary. The source of the placer gold is probably Cretaceous or Tertiary intrusive rocks (Bundtzen and others, 1987).|
|Workings or exploration||Gold was being mined in Ester Creek in 1926, and it was probably mined earlier (Holzheimer, 1926 [MR 64-1]). Mertie (1936) reports mining in 1933, and Bundtzen and others (1987) indicate mining sometime during the 1980s.|
|Indication of production||Yes; small|
|Production notes||Production from Ester Creek from the early 1900s to 1964 was 1,110 ounces of gold and 210 ounces of silver. Production figures for Ester Creek from 1980 to 1986 are unavailable (Bundtzen and others, 1987).|
Bundtzen, T.K., Cox, B.C., and Veach, N.C., 1987, Heavy mineral provenance studies in the Iditarod and Innoko districts, western Alaska: Alaska Division of Geological and Geophysical Surveys Public-Data File 87-16, 25 p.
Chapman, R.M., Patton, W.W., and Moll, E.J., 1985, Reconnaissance geologic map of the Ophir quadrangle, Alaska: U.S. Geological Survey Open-File Report 85-203, 19 p., 1 sheet, scale 1:250,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Ophir quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-367, 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.
Holzheimer, F.W., 1926, Placer operations, Innoko district: Alaska Territorial Department of Mines Miscellaneous Report 64-1, 16 p.
Mertie, J.B., Jr., 1936, Mineral deposits of the Ruby-Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 864-C, p. 115-245.
Metz, P.A., and Hawkins, D.B., 1981, A summary of gold fineness values from Alaska placer deposits: University of Alaska, Fairbanks, Mineral Industry Research Laboratory Report No. 45, 56 p.
|Last report date||8/7/2001|