The Unnamed (southwest shore of Mitrofania Island) is a lead, zinc, gold, and 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
Elevation:
Commodity: Lead, Zinc, Gold, Silver
Lat, Long: 55.824, -158.89900
Map: View on Google Maps
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Unnamed (southwest shore of Mitrofania Island) MRDS details
Site Name
Primary: Unnamed (southwest shore of Mitrofania Island)
Commodity
Primary: Lead
Primary: Zinc
Primary: Gold
Primary: Silver
Secondary: Arsenic
Secondary: Antimony
Location
State: Alaska
District: Alaska Peninsula
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
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Gangue: Quartz
Gangue: Calcite
Comments
Comment (Reference): Primary Reference = Wilson and others, 1988
Comment (Workings): Workings / Exploration = Rock samples 84AGe17-20 and 83AWs 63 collected by the U.S. Geological Survey in the mid-1980's, were reported to be anomalous in silver, gold, lead, zinc, antimony, and arsenic (Angeloni and others, 1985; Wilson and others, 1988).
Comment (Geology): Geologic Description = This occurrence is in an area mapped as undivided Tertiary volcanic rocks (Wilson and others, 1995). Small plutons Miocene or Pliocene granodiorite to quartz diorite crop out a few miles to the north and south of the occurrence (Wilson and others, 1995). At this location altered andesite(?) flows are cut by numerous quartz-calcite veins as much as 6 inches thick (Wilson and others, 1988). Some of the veins are braided and contain pyrite and probably others sulfides. Rock samples collected by the U.S. Geological Survey were reported to be anomalous in silver, gold, lead, zinc, antimony, and arsenic (Angeloni and others, 1985; Wilson and others, 1988).
Comment (Geology): Age = Tertiary.
Comment (Deposit): Model Name = Polymetallic veins (Cox and singer, 1986; model 22c).
Comment (Deposit): Other Comments = This site is located on land selected by the Bristol Bay Native Corporation.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.
Reference (Deposit): Angeloni, L.M., Wilson, F.H., and Sutlet, S., 1985, Map and tables showing preliminary rock geochemical data, Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Open-File Report 85-470, 179 p., 1 map sheet, scale 1:250,000.
Reference (Deposit): Arbogast, B.F., Bailey, E.A., and Frisken, J.G., 1987, Analytical results and sample locality maps of stream sediment, heavy-mineral-concentrate, and rock samples from the Port Moller, Stepovak Bay, and Simeonof island quadrangles, Alaska: U.S. Geological Survey Open-File Report 87-502, 122 p., 2 sheets, scale 1:250,000.
Reference (Deposit): Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.
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