|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||Ridgeway Creek is a south tributary of Lower Willow Creek (SO091). Its mouth is 2 miles upstream from the mouth of Lower Willow Creek on the Casadepaga River. This is locality 77 of Cobb (1972, MF 445; 1978, OF 78-181).|
Geologic descriptionThe lower mile of Ridgeway Creek carries gold, including small nuggets (Smith, 1910), but mining has not been reported (Cobb, 1978, 78-191). The regional contact between pelitic schist of possible Cambrian or Precambrian age and a lower Paleozoic metasedimentary assemblage passes through the headwaters of Ridgeway Creek (Till and others, 1986).
|Geologic map unit||(-164.41561756882, 64.8102573843987)|
|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 and its major tributaries (including Lower Willow Creek) 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||Prospecting was done on Ridgeway Creek prior to WW I but the unavailability of water was a handicap to early mining and none has been reported.|
|Indication of production||None|
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|