The Unnamed (near Round Mtn) is a lead, silver, gold, and zinc 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
Elevation:
Commodity: Lead, Silver, Gold, Zinc
Lat, Long: 62.04, -152.68000
Map: View on Google Maps
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Unnamed (near Round Mtn) MRDS details
Site Name
Primary: Unnamed (near Round Mtn)
Commodity
Primary: Lead
Primary: Silver
Primary: Gold
Primary: Zinc
Secondary: Arsenic
Secondary: Antimony
Location
State: Alaska
District: Yentna
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Quartz-sericite-pyrite, quartz-pyrite, carbonate, and magnetite alteration.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Stibnite
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Galena
Ore: Chalcopyrite
Ore: Arsenopyrite
Gangue: Sericite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c).
Comment (Deposit): Other Comments = Rock exposures at this site are limited to stream cuts.
Comment (Geology): Geologic Description = Mesozoic marine sedimentary rocks (KJs) and (or) undivided Tertiary tuff and tuffaceous sedimentary rocks (Tvs) mapped by (Reed and Nelson, 1980) are intruded by intermediate to mafic sills, dikes and small plugs (Cominco American Incorporated, unpublished report). The intrusive rocks are overprinted by quartz-sericite-pyrite and magnetite-carbonate alteration. Auriferous veins, pods and stockwork which contain variable amounts of pyrite, pyrrhotite, sphalerite, galena and quartz ,+/-chalcopyrite, stibnite and arsenopyrite are concentrated along intrusive contacts and structures. Geochemical values in rock chip samples range from several hundred ppb gold to just under an ounce per ton gold in select high grade samples. Silver values up to about an ounce per ton is recorded select samples (Cominco American Incorporated, unpublished report).
Comment (Geology): Age = Early or middle Tertiary; mineralization is interpreted to be linked to the Tvs, which Reed and Nelson (1980) relate to plutonism of the same age in this part of the Alaska Range.
Comment (Workings): Workings / Exploration = Prospecting, silt, soil and rock chip geochemistry, magnetic and VLF geophysical survey, and mapping at 1:12,000 scale by Cominco American Incorporated in the late 1980s. Geochemical values in rock chip samples range from several hundred ppb gold to just under an ounce per ton gold in select high grade samples. Silver values up to about an ounce per ton is recorded select samples (Cominco American Incorporated, unpublished report).
Comment (Reference): Primary Reference = This record
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle: U.S. Geological Survey Miscellaneous Investigations Map I-1174, scale 1:250,000.
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