Corky; Roseie; Ram's Horn; Verde Prospect, Tok District, Valdez-Cordova Borough, Alaska, USA
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Geology: A thin belt of serpentinite extends west-northwest from near Stratton Creek to north of Mentasta Lake (Richter, 1967, 1976). Mining claims for asbestos have been located near the east end of this belt (U. S. Bureau of Mines, 1995; Kardex location MILS 0020780090). The serpentinite locally contains rodingite inclusions with thin nephritic rims and lenses of magnesite-dolomite-silica rock (Richter, 1976). This alpine-type ultramafic body is within Devonian metasedimentary rocks and is considered to be Cretaceous (Richter, 1976).
Workings: There are no known workings but some surface prospecting has probably occurred.
Age: The inferred age of the serpentine body is Cretaceous (Richter, 1976).
Alteration: Serpentinization; magnesite-dolomite-silica replacement.
Commodities (Major) - Asbestos
Development Status: None
Deposit Model: Serpentine-hosted asbestos (Cox and Singer, 1986; model 8d)
2 entries listed.
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Richter, D.H., 1967, Geology of the upper Slana-Mentasta Pass area, southcentral Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 30, 27 p., 2 sheets, scale 1:63,360. Richter, D.H., 1976, Geologic map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-932, 1 sheet, scale 1:250,000. U.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U.S. Bureau of Mines Special Publication 12-95, CD-ROM.