The Unnamed (near Tukgahgo Mountain) is a copper, gold, and silver 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
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Unnamed (near Tukgahgo Mountain) MRDS details
Site Name
Primary: Unnamed (near Tukgahgo Mountain)
Commodity
Primary: Copper
Primary: Gold
Primary: Silver
Secondary: Platinum
Secondary: Palladium
Location
State: Alaska
District: Juneau (Skagway subdistrict)
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Molybdenite
Ore: Malachite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Geology): Age = Mid-Cretaceous or younger based on the age of the Mount Kashagnak pluton that hosts the deposits (Redman and others, 1984).
Comment (Geology): Geologic Description = The following description is from Still and others (1991). The geology of the area consists of roof pendants of metabasalt and amphibolite surrounded by hornblende diorite, granodiorite and monzonite. Sporadic narrow and discontinuous quartz veins occur in the area, mostly near the northwesterly trending, Tukgahgo Mountain fault. A sample collected across a vein with visible molybdenite contained 1,240 ppm molybdenum. Seven samples analyzed for platinum and palladium contained from nil to 0.09 ppm platinum and from 0.004 to 0.07 ppm palladium. The source of the platinum and palladium may be ultramafic rocks that crop out several miles to the southeast of this area. Descriptions of samples collected from this area by Gilbert and others (1991) include numerous references to quartz veins with pyrite; chalcopyrite, malachite, and molybdenite are also mentioned in some descriptions. Samples contained up to 0.824 ppm gold, 2.70 ppm silver, and 2,140 ppm copper. The intrusive rocks are part of the Mount Kashagnak pluton (Redman and others 1984). It's mid-Cretaceous age establishes a maximum age for the mineralization.
Comment (Exploration): Status = Probably inactive
Comment (Deposit): Other Comments = the Alaska, Chilkat Bald Eagle Preserve is less than 1 mile to the west of these occurrences.
Comment (Deposit): Model Name = Polymetallic veins (?) (Cox and Singer, 1986; model 22c?).
Comment (Reference): Primary Reference = Gilbert and others, 1991
References
Reference (Deposit): Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.
Reference (Deposit): Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.
Reference (Deposit): Redman, E.C., Retherford, R.M., and Hickok, B.D., 1984, Geology and geochemistry of the Skagway B-2 Quadrangle, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 84-31, 34 p., 4 sheets, scale 1:40,000.
Reference (Deposit): Gilbert, W.G., Still, J.C., Burns, L.E., Wier, K.R., and Redman, E.C., 1991, Geochemistry of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-5, 1 sheet, scale 1:63,360, 75 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
