|Quadrangle map, 1:250,000-scale||SO|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Thorpe Creek is a very small south tributary to the Casadepaga River. The mouth of Thorpe Creek is about 1.9 miles upstream of the mouth of Big Four Creek (SO069). This is locality 65 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionGold mining on Thorpe Creek took place where it crosses a bench of the Casadepaga River (Brooks and others, 1901). Bedrock was not encountered here although schist and marble are exposed in the creek's headwaters. Mining between 1900 and 1907 is reported and some coarse gold was recovered (Smith, 1910).
|Geologic map unit||(-164.207619518201, 64.8852615129647)|
|Mineral deposit model||Placer Au-PGE (Cox and Singer, 1986; model 39a).|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary; the numerous incised terraces along the Casadepaga River 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.|
|Workings or exploration||Small-scale placer mining took place between 1900 and 1907.|
|Indication of production||Yes; small|
Brooks, A.H., Richardson, G.B., Collier, A.J., and W.C. Mendenhall, 1901, A reconnaissance in the Cape Nome and adjacent gold fields of Seward Peninsula, Alaska, in 1900: U.S. Geological Survey Special Publication, p. 1-185, maps.
Cobb, 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.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||8/19/1999|