The Rhyolite is a mercury mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Rhyolite MRDS details
Site Name
Primary: Rhyolite
Commodity
Primary: Mercury
Secondary: Antimony
Location
State: Alaska
District: Aniak
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Almaden Hg
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Andesitic, rhyolite porphyry dikes and sills altered to silica-carbonate rock.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Stibnite
Ore: Cinnabar
Gangue: Quartz
Gangue: Limonite
Gangue: Clay
Comments
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = Trenched in 1957 one year after discovery. USBM trenched and sampled in 1958-59.
Comment (Reference): Primary Reference = Sainsbury and MacKevett, 1965, p. 46-49
Comment (Geology): Geologic Description = Small veinlets, pods, lenses, and disseminations of cinnabar occur in faults and shear zones in silica-carbonate altered dikes and shattered graywacke. Veinlets up to 0.5 in thick, pods up to 4 in thick occur at intersection of veinlets. Stibnite float was found near the airstrip at summit of Juninggulra Mountain.
Comment (Production): Production Notes = Apparently, a few flasks of mercury were produced.
Comment (Deposit): Other Comments = Trenching difficult because of permafrost.
Comment (Commodity): Gangue = carbonate
Comment (Deposit): Model Name = Epithermal vein, disseminated, shear zone; mercury-antimony
References
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Reference (Deposit): Sainsbury, C.L. and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p.
Reference (Deposit): Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 3 plates, scale 1:250,000.
Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Sleetmute quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-368, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountain quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p.
Reference (Deposit): Rytuba, J.J., 1986, Descriptive model of Almaden Hg, in Cox, D.P., and Singer, D.A., eds. Mineral Deposit Models: U.S. Geological Survey Bulletin 1693, p. 180.
Reference (Deposit): Maloney , R.P., 1962, Trenching and sampling of the Rhyolite mercury prospect, Kuskokwim River basin, Alaska: U.S. Bureau of Mines Report of Investigations 6141, 43 p.
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