Yankee Girl

Prospect, Inactive

Commodities and mineralogy

Main commodities Pb; Sn
Ore minerals cassiterite; cerussite; galena
Gangue minerals arsenopyrite; iron oxide gossan; fluorite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale TE
Quadrangle map, 1:63,360-scale B-5
Latitude 65.461
Longitude -167.131
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 setting

Geologic description

This 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

Production and reserves

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