|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||Dawson Creek is a short north tributary to the Casadepaga River; it is located across from the mouth of Big Four Creek (SO066). The surface elevation here is about 225 feet. This is locality 70 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionDawson Creek heads in Paleozoic marble of Mount Dixon (Till and others, 1986) but its lower reaches cross terraces of the Casadepaga River. Small-scale mining occurred along lower Dawson Creek where bedrock includes micaceous schist (Smith, 1910) and apparently at least some of this mining was of bench gravels that were 8 to 10 feet thick.
|Geologic map unit||(-164.178621762087, 64.9122625416851)|
|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 from 170 to 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 surface placer mining occurred between 1900 and 1907 (Cobb, 1978, OF 78-181).|
|Indication of production||Yes; small|
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.
Smith, P.S., 1910, Geology and mineral resources of the Solomon and Casadepaga quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 433, 234 p.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||8/19/1999|