|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||Dry Creek (Gulch) is a short north tributary to the Casadepaga River. The mouth of Dry Creek is about 2.5 miles upstream from the mouth of Big Four Creek (SO069). This is locality 66 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionDry Creek is incised into a terrace of the Casadepaga River. Mining along the active channel started in 1900 and one person was mining here in 1907 (Smith, 1910). The gold was concentrated on a clay seam and most was fine; a 0.1 ounce nugget was recovered in 1900 (Brooks and others, 1901).
|Geologic map unit||(-164.229619871218, 64.8872612365876)|
|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|