The Unnamed (near Angiaak Pass) is a molybdenum, arsenic, and fluorine-fluorite 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: Molybdenum, Arsenic, Fluorine-Fluorite
Lat, Long: 67.44, -155.06000
Map: View on Google Maps
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Unnamed (near Angiaak Pass) MRDS details
Site Name
Primary: Unnamed (near Angiaak Pass)
Commodity
Primary: Molybdenum
Primary: Arsenic
Primary: Fluorine-Fluorite
Secondary: Copper
Secondary: Silver
Secondary: Lead
Location
State: Alaska
District: Noatak
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: Porphyry Cu (North America)
Model Name: Climax Mo
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: White mica and pyrite-oxidation.
Rocks
Name: Gneiss
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Devonian
Name: Gneiss
Role: Associated
Age Type: Associated Rock
Age Young: Late Devonian
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Fluorite
Ore: Galena
Ore: Molybdenite
Comments
Comment (Geology): Age = Devonian, based on the age of the pluton (Nelson and Grybeck, 1980).
Comment (Reference): Primary Reference = Grybeck and Nelson, 1981
Comment (Geology): Geologic Description = Porphyritic, foliated granite of Devonian age is irregularly stained a gaudy orange-yellow over an area of about 9 square miles. The staining is related to alteration of the mafic minerals in the granite to coarse white mica and oxidization of pervasive disseminated pyrite. Grab samples rarely give anomalous metal values but extended search almost anywhere can usually locate a few grains of molybdenite, fluorite, or arsenopyrite along fractures in the altered granite. ? At one outcrop near the top of peak 6711 in the center of the area, a one-inch-thick quartz vein in a small roof pendant of calc-silicate rocks that overlie the granite contains visible galena and 7 ppm Ag. Area only brielfy examined at a few scattered places and it is likely that other such occurrences can be found in this roof pendant.
Comment (Deposit): Model Name = Porphyry Mo or porphyry Cu (Cox and Singer, 1986; models 16 or 17)
Comment (Deposit): Other Comments = Located within Gates of the Arctic National Park.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Nelson, S.W., and Grybeck, D.J., 1980, Geologic map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-A, 2 sheets, scale 1:250,000.
Reference (Deposit): Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000.
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