The Mountain Top 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
Mountain Top MRDS details
Site Name
Primary: Mountain Top
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: 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: Basaltic rock altered to silica, dolomite, clay, and minor iddingsite.
Rocks
Name: Basalt
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Cinnabar
Ore: Stibnite
Gangue: Dickite
Gangue: Dolomite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Epithermal vein, mercury-antimony
Comment (Geology): Geologic Description = Bedrock consists of graywacke and shale in association with olivine basalt dikes (Sorg and Estlund, 1972) or flows (Reifenstuhl and others, 1984). Mineralization consists of veins of cinnabar 1 dolomite localized near faults in the basalt. Stibnite 1 quartz found as float fragments. Sorg and Estlund (1972) reported presence of hydrocarbons, dickite, and buddingtonite at Mountain Top.
Comment (Production): Production Notes = About 165 flasks of Hg produced from 1982-86 (Miller and others, 1989)
Comment (Reference): Primary Reference = Sorg "&" Estlund, 1972
Comment (Reserve-Resource): Reserves = Sorg and Estlund (1972) estimate 200 flasks of reserves (produced 165 flasks from '82-86).
Comment (Workings): Workings / Exploration = Explored by hand auger and bulldozer after discovery in 1968. USBM drilled 7 holes (50 ft(15 m) in 1979.
Comment (Exploration): Status = Active
References
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): 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): 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): Robinson, M.S., 1984, Rock, pan-concentrate, and stream-sediment geochemistry, Sleetmute B-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-11, scale 1:40,000.
Reference (Deposit): Sorg, D.H., and Estlund, M.B., 1972, Geologic map of the Mountain Top mercury deposit, southwestern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-449, scale 1:600.
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): Reifenstuhl, R.R., Robinson, M.S., Smith, T.E., Albanese, M.D., and Allegro, G.A., 1984, Geologic map of the Sleetmute B-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-12, scale 1:40,000.
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