|Quadrangle map, 1:250,000-scale||TE|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Yankee Girl prospect is located on the north side of Tin Creek valley at an elevation of 900 feet. It is 700 feet west of the contact of the Tin Creek stock (see Sainsbury, 1969, plate 6). Tin Creek is an east tributary to Lost River whose confluence is located 4.5 miles upstream from the mouth of Lost River on the Bering Sea. This is locality 9 of Cobb and Sainsbury (1972). Cobb (1975) summarized relevant references under the name 'Yankee Girl'.|
Geologic descriptionThis prospect is a gossanous fracture zone in Ordovician limestone peripheral to the Tin Creek granite stock (Knopf, 1908, p. 269; Sainsbury, 1969, plate 6). The gossan contains galena remnants, cerussite, arsenopyrite and some disseminated cassiterite (Seidtmann and Cathcart, 1922, p. 80). Anderson (1947) reported a sample assay that ran 0.02 opt gold, 0.6 opt silver, 3.1% lead, and 0.47% tin.
|Geologic map unit||(-167.133718131948, 65.4602248108426)|
|Mineral deposit model||Possibly polymetallic replacement (model 19a?) or replacement tin (model 14c?) of Cox and Singer (1986) may apply but close analogs are not obvious.|
|Mineral deposit model number||14c? or 19a?|
|Age of mineralization||The age of the mineralization is assumed to be related to the development of tin systems in the Lost River area and therefore Late Cretaceous, the age of the tin-mineralizing granites there (Hudson and Arth, 1983).|
|Alteration of deposit||Oxidation and related iron oxide/hydroxide development; secondary lead minerals|
|Workings or exploration||A short exploratory adit was originally opened on the prospect but it had already caved by 1918.|
|Indication of production||None|
|Reserve estimates||Not defined|
Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Teller quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-587, 130 p.
Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resources map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.
Hudson, T.L., and Arth, J. G., 1983, Tin granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, p. 768-790.
Knopf, Adolph, 1908, Geology of the Seward Peninsula tin deposits, Alaska: U.S. Geological Survey Bulletin 358, 71 p.
Sainsbury, C.L., 1969, Geology and ore deposits of the central York Mountains, western Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 1287, 101 p.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||5/10/1998|