The Unnamed (north of Noatak River) is a copper, tin, and lead 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 (north of Noatak River) MRDS details
Site Name
Primary: Unnamed (north of Noatak River)
Commodity
Primary: Copper
Primary: Tin
Primary: Lead
Secondary: Zinc
Secondary: Antimony
Secondary: Bismuth
Secondary: Beryllium
Secondary: Gold
Secondary: Arsenic
Secondary: Silver
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: Sn skarn
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Quartz and calc-silicate minerals.
Rocks
Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Late Devonian
Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Devonian
Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Late Devonian
Analytical Data
Not available
Materials
Ore: Pyrrhotite
Ore: Sphalerite
Ore: Chalcopyrite
Ore: Galena
Gangue: Quartz
Comments
Comment (Geology): Geologic Description = The occurrences at the site are contact-metamorphic deposits in Paleozoic phyllite and limestone over a dome of Devonian gneissic granite that is exposed on the north bank of the Noatak River. Three small mineral occurrences have been documented (Grybeck and Nelson, 1981). They include quartz vein rubble and skarn containing various combinations of ore minerals including galena, chalcopyrite, pyrrhotite, and sphalerite. Select samples contain up to 480 ppm Ag, 3.5 ppm Au, 5,000 ppm As, 150 ppm Be, 150 ppm Bi, and 100 ppm Sn. The occurrences are similar to those at SP009, and to other contact metamorphic deposits elsewhere in the Brooks Range (Newberry and others, 1986).
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Related to the intrusion of the Devonian pluton.
Comment (Workings): Workings / Exploration = Samples were mostly collected during spot stops and short traverses during geologic mapping by the USGS in the late 1970s.
Comment (Commodity): Gangue = Calc-silicate minerals
Comment (Deposit): Model Name = Skarn (Cox and Singer, 1986; model 14b)
Comment (Deposit): Other Comments = Located within Gates of the Arctic National Park.
Comment (Reference): Primary Reference = Grybeck and Nelson, 1981
References
Reference (Deposit): Garland, R.E., Eakins, G.R., Trible, T.C., 1975, Geochemical analysis of rock and stream-sediment samples from Survey Pass C-5 quadrangle: Alaska Division of Geological and Geophysical Surveys Open-File Report 64, 4 p, 2 sheets, scale 1:63,360.
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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