The Unnamed (near the mouth of Crillon Inlet to Lituya Bay) 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 (near the mouth of Crillon Inlet to Lituya Bay) MRDS details
Site Name
Primary: Unnamed (near the mouth of Crillon Inlet to Lituya Bay)
Commodity
Primary: Copper
Primary: Nickel
Secondary: Gold
Secondary: Cobalt
Secondary: Silver
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: Limonitic staining.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Goethite
Ore: Pyrite
Ore: Nickel
Ore: Pyrrhotite
Comments
Comment (Commodity): Ore Material = pyrrhotite (nickeliferous)
Comment (Geology): Age = Tertiary.
Comment (Geology): Geologic Description = Disseminated sulfide minerals (chalcopyrite and pyrrhotite) occur in gabbro about 0.6 mile southwest of the Fairweather fault within the eastern part of the Lituya terrane defined by Brew and others (1978). The eastern part of the Lituya terrane is similar to the adjacent Fairweather terrane in abundance of intrusive rocks and presence of schistose metasedimentary and metavolcanic rocks.? Mineralized (iron-stained) float was at the base of a cliff by the U.S. Bureau of Mines (Kimball and others, 1978, p. C93). Earlier Kennedy and Walton (1946, p. 71) had reported a gabbro dike, that contained about 1 percent chalcopyrite, also, pyrrhotite, cut granitic rock near the same location. Kimball and others (1978, p. C93) reported that the iron-stained float in scree contained as much as 1600 ppm copper, 2000 ppm nickel, 300 ppm cobalt and traces of gold and silver. Visible minerals in the scree float were quartz, chlorite, epidote, hornblende, pyrite and secondary goethite. The U.S. Bureau of Mines investigators observed a conspicuous iron-stained zone on the cliff that they inferred could be the dike reported by Kennedy and Walton, but they did not have time to investigate the possible source.
Comment (Reference): Primary Reference = Kennedy and Walton, 1947; Kimball and others, 1978
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = Lode: Disseminated copper and nickel(?) sulfide minerals in an altered mafic dike.
Comment (Deposit): Other Comments = Kimball and others (1978) did not recover the mineralized dike reported earlier by Kennedy and Walton (1946), but they did note iron-stained on the cliff above the mineralized scree at the base of the cliff. The Bureau of Mines party did not have time to examine the stained occurrence. The site is in Glacier Bay National Park and Preserve.
Comment (Workings): Workings / Exploration = Surface exposure, cliff and talus. A float sample of iron-stained altered gabbro(?) from the talus contained 2000 ppm nickel, 1600 ppm copper, 300 ppm cobalt, 1 ppm silver, and 0.15 ppm gold. Kennedy and Walton (1946) reported a gabbro dike from the same area that contained disseminated chalcopyrite.
References
Reference (Deposit): Kennedy, G.C. and Walton, M.S., Jr., 1946, Geology and associated mineral deposits of some ultrabasic rocks in southeastern Alaska: U.S. Geological Survey Bulletin 947-D, p. 65-84.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Mount Fairweather quadrangle, AK: U.S. Geological Survey Miscellaneous Field Study Map MF-436, 1 sheet, scale 1:250,000.
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): MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.
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