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Milroy Creek

Occurrence, Probably inactive

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Commodities and mineralogy

Main commodities Ag; Pb
Ore minerals galena; lead carbonates; pyromorphite

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale D-3
Latitude 65.9
Longitude -163.3
Nearby scientific data Find additional scientific data near this location
Location and accuracy Milroy Creek is a north tributary to Hannum Creek (BN056 and BN057). A locality on this creek was not included by Cobb (1972; MF 417) but Cobb (1975; OFR 75-429; 1981; OFR 81-363A, p. A15) does make reference to it. This locality could be anywhere along Milroy Creek and therefore cannot be located to closer than a few miles.

Geologic setting

Geologic description

Anderson (1947, p. 31) reports that heavy mineral concentrates from Milroy Creek gravels are similar to those from Cunningham Creek (BN113) which contain galena, lead carbonates, and pyromorphite. The Harrys Creek (BN055) and Hannum Creek (BN056) galena-bearing lode deposits are sources of lead minerals in gravels downstream from them. The presence of placer gold has not been specifically reported (Cobb, 1981; OFR 81-363A).
Geologic map unit (-163.302702272489, 65.8993027708669)
Mineral deposit model Placer Au-PGE? (Cox and Singer, 1986; model 39a?).
Mineral deposit model number 39a?
Age of mineralization Quaternary

Production and reserves

Indication of production Undetermined

References

MRDS Number 10307300

References

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., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.
Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Bendeleben quadrangle, Alaska; Supplement to open-file report 75-429; Part A, Summaries of data to January 1, 1980: U.S. Geological Survey Open-File Report 81-363-A, 25 p.
Reporters Travis L. Hudson (Applied Geology)
Last report date 3/15/1999