The Unnamed (west of Mt. Fairweather) is a copper and nickel 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 (west of Mt. Fairweather) MRDS details
Site Name
Primary: Unnamed (west of Mt. Fairweather)
Commodity
Primary: Copper
Primary: Nickel
Secondary: Titanium
Secondary: Chromium
Secondary: Cobalt
Secondary: PGE
Location
State: Alaska
District: Yakutat
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Local secondary alteration of copper-bearing minerals.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrrhotite
Ore: Nickel
Ore: Pentlandite
Ore: Malachite
Ore: Cubanite
Ore: Chalcopyrite
Comments
Comment (Reference): Primary Reference = Kimball and others, 1978
Comment (Workings): Workings / Exploration = Helicopter reconnaissance reported in Kimball and others (1978, Fig. C-34, p. C117-C118) found conspicuous copper staining near the western contact of the Mt. Fairweather intrusion. No landings were possible.
Comment (Deposit): Model Name = Cumulate or sulfide segregations in layered-mafic intrusions. Contact deposits in schist. Partly oxidized.
Comment (Deposit): Other Comments = the site is in Glacier Bay National Park and Preserve. Further exploration would need mountaineering support.
Comment (Geology): Age = Tertiary.
Comment (Geology): Geologic Description = This occurrence, and the occurrence of detrital mineralized mafic rocks in nearby glacial moraine (MF016 and MF017), suggests that there may be (a) Brady Glacier-type nickel-copper deposits in the Mount Fairweather layered mafic-ultramafic intrusion and (b) contact-type copper deposits in the schist country rocks. The inferred mineral deposits are in or at the contact of the Mt. Fairweather layered mafic intrusion, the northern-most of four layered mafic complexes of the Fairweather Range (Brew and others, 1978). The primary copper sulfides exposed at or near the contact have locally been oxidized to malachite, forming copper-stained zones visible from aircraft fly-by. The sites have not been occupied.
References
Reference (Deposit): Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.
Reference (Deposit): Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.
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