|Current site name||Twin Creek|
|Alternate or previous names||Big Boulder Creek, Little Boulder Creek, John Creek, Notobac Creek|
|Geographic coordinates:||-151.53279, 62.33952 (WGS84)|
|Relative position||The location given is the center of a placered area which extends for about 3000 feet upstream and about one mile downstream in Sections 16, and 21, T. 26 N., R. 12 W., of the Seward Meridian. John, Big Boulder, and Little Boulder Creeks are headwater tributaries to Twin Creek. Clark and Cobb (1972) show this property as locality 17 on MF-369. It is also shown by Reed and others (1978) as locality 68 and by MacKevett and Holloway (1977) as locality 13.|
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|Materials||Type of material|
|USGS model code||39a|
|BC deposit profile||C01. C02|
|Deposit model name||Placer Au-PGE|
|Mark3 model number||54|
|Development status||Past Producer|
|Agency||Database name||Acronym||Record ID||Notes|
|USGS||Mineral Resources Data System||MRDS||A011589|
|USGS||Alaska Resource Data File||ARDF||TL026|
Capps, S.R., 1924, Geology and mineral resources of the region traversed by the Alaska Railroad: U.S. Geological Survey Bulletin 755-C, p. 73-150.
Smith, P.S., 1942, Mineral Industry of Alaska in 1940: U. S. Geological Survey Bulletin 933-A, p. 1-102.
Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.
C.C. Hawley and Associates, Inc., 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U.S. Bureau of Mines Open-File Report 24-78, 275 p., 7 plates.
Reed, B.L., Nelson, S.W., Curtin, G.C., and Singer, D.A., 1978, Mineral resources map of the Talkeetna Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-870-D, 1 sheet, scale 1:250,000.
Cobb, E.H., and Reed, B.L., 1980, Summaries of data and lists of reference to metallic and selected nonmetallic mineral deposits in the Talkeetna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-884, 106 p.
Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.
Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-369, 1 sheet, scale 1:250,000.
Smith, P.S., 1942, Mineral industry of Alaska in 1940: U.S. Geological Survey Bulletin 933-A, p. 1-102.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
|Subject category||Comment text|
|Deposit||Model Name = Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Deposit||Other Comments = Some data for Twin and Mills (TL059) Creeks are combined in the literature. Cobb and Reed (1980) indicate that Notobac Creek is probably another name for Twin Creeks or for a tributary to Twin Creek and that John(s) Creek is a small, steep-sided gulch tributary to Twin Creek that is cut in the Tertiary Kenai Group sediments. Capps (1913) reports that Johns Creek saw small production for a few years during the first quarter of the 20th century.|
|Reporter||10-AUG-1998||Madelyn A. Millholland||Millholland & Associates|