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  3. Alaska Resource Data File (ARDF)

Thompson

Prospect, Inactive

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Commodities and mineralogy

Main commodities Sb; Zn
Ore minerals sphalerite; stibnite

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale D-1
Latitude 64.7831
Longitude -165.1694
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Thompson prospect is near the nead of Rocky Mountain Creek, an east tributary to upper Nome River, at an elevation of about 1,400 feet. It is locality 19 of Hummel (1962 [MF 248]) and locality 37 of Hummel (1975) and included in locality 32 of Cobb (1972 [MF 463], 1978 [OFR 78-93]). The prospect is located within about 1,000 feet of the coordinates.

Geologic setting

Geologic description

The Thompson prospect is a vein or fault-controlled occurrence containing zinc and antimony minerals (Hummel, 1975) that are assumed to be sphalerite and stibnite. The prospect is near or at the upper contact of calcareous schist with a marble layer; the rocks strike northwest and dip northeast (Hummel, 1962 [MF 248]). The Thompson prospect is one of several of diverse type and metal content in the general vicinity of Rocky Mountain Creek, Nelson Gulch, and Christian Creek.
Geologic map unit (-165.17201918645, 64.7823431375288)
Mineral deposit model Vein? occurrence of antimony and zinc minerals in calcareous metasedimentary rocks.
Age of mineralization Probably mid-Cretaceous or younger if a vein occurrence.

Production and reserves

Workings or exploration Probably discovered in the World War II era during the search for strategic metals.
Indication of production None

References

MRDS Number A012816

References

Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
Hummel, C.L., 1962, Preliminary geologic map of the Nome D-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-248, 1 sheet, scale 1:63,360.
Hummel, C.L., 1975, Mineral deposits and occurrences, and associated altered rocks in southwest Seward Peninsula, western Alaska: U.S. Geological Survey Open-File Report 75-2, 1 sheet, scale 1:125,000.
Reporters C.C. Hawley and Travis L. Hudson
Last report date 10/22/1999