|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||Lightning Creek is a small south tributary to the Casadepaga River. Its mouth is about 2.5 miles upstream from the mouth of Big Four Creek. This is locality 62 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionSmith (1910) noted that considerable prospecting had occurred by 1907 along the active drainage of lower Lightning Creek where it crosses terraces of the Casadepaga River. The terrace gravels here are 5 to 10 feet above the active stream. Bedrock in the area is primarily part of a lower Paleozoic metasedimentary assemblage (Till and others, 1986).
|Geologic map unit||(-164.231618363494, 64.8702608674578)|
|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||Surface prospecting pits were dug along the active stream in about 1907.|
|Indication of production||Undetermined|
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|