|Quadrangle map, 1:250,000-scale||SL|
|Quadrangle map, 1:63,360-scale||C-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is in the bed of an unnamed stream that flows southwest to its mouth at Poowooliak Bay on the southwest coast of St. Lawrence Island. The mouth of this stream is 4 miles northeast of Poowooliak Point. The site is about 1 1/2 miles upstream of the mouth, just inland of the coastal wavecut platform. It was not included by Cobb (1972, 1980).|
Geologic descriptionThe occurrence is characterized as polymetallic sulfide mineralization in altered volcanic rocks. Silicified, fine-grained volcanic rock exposed in the streambed contains pyrite and one rock sample contained 700 ppm zinc (Patton and Csejtey, 1971, p. C8, C15).
|Geologic map unit||(-171.212754173193, 63.4190821142048)|
|Mineral deposit model||Polymetallic veins? (Cox and Singer, 1986; model 22c?).|
|Mineral deposit model number||22c?|
|Age of mineralization||The volcanic rocks here are mapped as part of a mid-Cretaceous assemblage but the age of mineralization could be Cretaceous or Tertiary, the age of volcanic and related hypabyssal intrusive rocks on western St. Lawrence Island (Patton and Csejtey, 1980).|
|Alteration of deposit||The volcanic rock here is silicified and pyrite-bearing.|
|Workings or exploration||A single rock sample contained 700 ppm zinc (Patton and Csejtey, 1971, p. C8, C15).|
|Indication of production||None|
Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1 sheet, scale 1:250,000.
Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.
Patton, W.W., Jr., and Csejtey, Bela, Jr., 1971, Preliminary geologic investigations of western St. Lawrence Island, Alaska: U.S. Geological Survey Professional Paper 684-C, p. C1-C15.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||9/10/1998|