|Quadrangle map, 1:250,000-scale||SL|
|Quadrangle map, 1:63,360-scale||D-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Tiflighak Bay is a small concave shoreline on the east side of the northwest tip of St.Lawrence Island. This is an area of steep sea cliffs cut into intrusive rocks of the Sevuokuk pluton. This location is only known from an oral communication (Cobb, 1980, p. 60). Small galena-bearing quartz veins are said to be exposed near the top of the cliff. This site is probably located within 0.5 mile. It is locality 1 of Cobb (1972) and Cobb (1980) summarized relevant references under the name 'Tiflighak Bay'.|
Galena in small quartz veins in Cretaceous quartz monzonite exposed near top of cliff (oral communication, Bela Csejtey, Jr. May 24, 1972; as cited by Cobb, 1972; 1980).The Sevuokuk pluton in the vicinity of this site is biotite quartz monzonite (Csejtey, Patton and Miller, 1971) for which one K/Ar determination indicates an age of 108 +/- 3.2 Ma (Patton and Csejtey, 1980).
|Geologic map unit||(-171.652804793075, 63.7590756079382)|
|Mineral deposit model||Vein in granitic rock; polymetallic veins? (Cox and Singer, 1986; model 22c?).|
|Mineral deposit model number||22c?|
|Age of mineralization||Not known; assumed to be mid -Cretaceous, the age of the associated granitic rocks.|
|Workings or exploration||None|
|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.
Csejtey, Bela, Jr., Patton, W.W., Jr., and Miller, T.P., 1971, Cretaceous plutonic rocks of St. Lawrence Island, Alaska, a preliminary report: U.S. Geological Survey Professional Paper 750-D, p. D68-D76.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||9/10/1998|