The Unnamed (north of Akabluak Pass) is a zinc, lead, silver, and copper 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: Zinc, Lead, Silver, Copper
Lat, Long: 67.47611, -154.67806
Map: View on Google Maps
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Unnamed (north of Akabluak Pass) MRDS details
Site Name
Primary: Unnamed (north of Akabluak Pass)
Commodity
Primary: Zinc
Primary: Lead
Primary: Silver
Primary: Copper
Secondary: Tungsten
Secondary: Tin
Secondary: Bismuth
Location
State: Alaska
District: Koyukuk
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: Sn skarn
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Gangue: Arsenopyrite
Gangue: Pyrrhotite
Comments
Comment (Geology): Age = Devonian-related to intrusion of Devonian pluton.
Comment (Workings): Workings / Exploration = Selected hand specimens contain up to 200 ppm Ag, 1000 ppm Bi and W, and more than 1000 ppm Sn (Grybeck and Nelson, 1981). In general, however, the contact is shows little sign of skarn or introduction of metals, and there is no indication of any potential for an ore deposit of significant size.
Comment (Reference): Primary Reference = Grybeck and Nelson, 1981
Comment (Deposit): Model Name = Skarn (Cox and Singer, 1986; model 14b)
Comment (Geology): Geologic Description = This site represents several spot checks and short traverses to evaluate about one thousand feet of well-exposed contact of Devonian gneissic granite in contact with Paleozoic strata (Grybeck and Nelson, 1981). The occurrence consists of several small masses of ore minerals, a few feet across. These minerals include various combinations of chalcopyrite, pyrrhotite, sphalerite, arsenopyrite, and galena. The minerals occurr erratically in metamorphic rocks along 1000 ft. of the contact zone. This occurrence is one of several associated with the contact zone of the Mt. Igikpak pluton (Newberry and others, 1986).
Comment (Exploration): Status = Inactive
References
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.
Reference (Deposit): Newberry, R.J., Dillon, J.T., and Adams, D.D., 1986, Regionally metamorphosed calc-silicate-hosted deposits of the Brooks Range, northern Alaska: Economic Geology, v. 81, p. 1728-1752
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