Moonlight Creek Mine, Council District, Nome Borough, Alaska, USA
Location: Moonlight Creek is a small north tributary of the Casadepaga River. Its mouth is at an elevation of 425 feet about 3.5 miles upstream from the old town of Casadepaga. This is locality 80 of Cobb (1972, MF 445; 1978, OF 78-181).
Geology: Mertie (1918) reports that placer mining took place along this creek in 1916. Moonlight Creek flows close to the contact of pelitic schist of possible Cambrian or Precambrian age to the east with a lower Paleozoic metasedimentary assemblage, that includes marble in this drainage, to the west (Till and others, 1986).
Workings: Some small-scale mining is reported to have taken place in 1916 along this creek.
Age: Quaternary; the numerous incised terraces along the Casadepaga River and its major tributaries indicate that more than one cycle of erosion and deposition has developed placer deposits in the area. The low elevations between 170 and 270 feet along the first 11 miles of the river, suggest that Quaternary sea level fluctuations could have influenced placer development.
Commodities (Major) - Au
Development Status: Yes; small
Deposit Model: Placer Au-PGE (Cox and Singer, 1986; model 39a).
ReferencesCobb, E.H., 1972, Metallic mineral resources map of the Solomon quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-445, 1 sheet, scale 1:250,000. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Solomon quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-181, 185 p. Mertie, J.B., Jr., 1918, Lode mining and prospecting on Seward Peninsula: U.S. Geological Survey Bulletin 662-H, p. 425-449. Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.
1 entry listed. 1 valid mineral.
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New Locality Added: Putuma Mine, Yura, Tomave, Antonio Quijarro Province, Potosí Department, BoliviaFrom Alfredo Petrov, 28th Jul 2014 07:17:02