The Unnamed (near VABM Upselat) is a silver 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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Unnamed (near VABM Upselat) MRDS details
Site Name
Primary: Unnamed (near VABM Upselat)
Commodity
Primary: Silver
Secondary: Gold
Location
State: Alaska
District: McGrath
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
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: Ferricrete oxidation common.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = This description
Comment (Workings): Workings / Exploration = The reporter investigated the site in 1977 as part of an ADGGS minerals appraisal. Two chip samples collected from the mineralized zone in alaskite average 2.33 grams/tonne silver and 0.68 grams/tonne gold.
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = This unnamed occurrence is associated with a small, 2 square kilometer alaskite pluton that intrudes the Late Cretaceous Kuskokwim Group. A prominent northwest trending lineament - possibly a fault - forms the eastern boundary of the alaskite. The alaskite is undated, but thought to be correlative with other Late Cretaceous-early Tertiary plutonic suites in the Kuskokwim Mineral Belt (Bundtzen and Miller, 1997). A stockwork-bearing hornfels that crops out 1.5 kilometers east of the alaskite pluton may indicate a larger intrusion at depth. Mineralization occurs as ferricrete stained, pyritic-quartz veins and breccia in hornfels. Two chip samples collected of mineralized zones average 2.33 grams/tonne silver and 0.68 grams/tonne gold.
Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).
References
Reference (Deposit): Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Economic Geology Monograph #9, Mineral Deposits of Alaska, p. 242-286.
Reference (Deposit): Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.
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