The Unnamed (southwest of Red Mountain) is a zinc 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 (southwest of Red Mountain) MRDS details
Site Name
Primary: Unnamed (southwest of Red Mountain)
Commodity
Primary: Zinc
Secondary: Lead
Secondary: Molybdenum
Secondary: Cadmium
Secondary: Silver
Location
State: Alaska
District: Juneau
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
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Devonian
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Devonian
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Galena
Ore: Hydrozincite
Ore: Pyrite
Ore: Smithsonite
Ore: Sphalerite
Gangue: Calcite
Comments
Comment (Geology): Geologic Description = The occurrence is in the Black Cap Limestone of Devonian age, near a granodiorite cupola of probable Cretaceous age (MacKevett and others, 1971, p. 55). Pyrite-rich pods and impregnations as much as 10 feet long and 1 foot diameter occur in the limestone.? A representative sample collected by MacKevett and others (1971, table 9) contained 7000 ppm zinc, 500 ppm lead, 70 ppm cadmium, 1.5 ppm silver and an anomalous amount (30 ppm) of molybdenum. At the site, white incrustations, either hydrozincite or smithsonite, occur as secondary minerals on the pyrite-rich mass. Sphalerite is assumed to be the primary zinc mineral. Lead is abundant enough so that galena could exist as the primary lead mineral.? the pods are too small and lean to be of significance, but they are probably distal phases of the igneous-affiliated mineral deposits of the area. The existence of anomalous quantities of molybdenum suggests a distal relation to nearby molybdenum deposits, as at the Nunatak (MF036).
Comment (Deposit): Other Comments = MacKevett and others (1971, p. 55) thought that the deposits were too small to be of economic significance. The site is in Glacier Bay National Park and Preserve.
Comment (Deposit): Model Name = Distal sulfide-rich replacement pods in limestone.
Comment (Reference): Primary Reference = MacKevett and others, 1971
Comment (Workings): Workings / Exploration = There are no workings. A sample of a partly oxidized sulfide pod in limestone exposed at the site contained 7000 ppm zinc, 500 ppm lead, 70 ppb cadmium, 30 ppm molybdenum and 1.5 ppm silver (MacKevett and others, 1971).
Comment (Geology): Age = Cretaceous or younger.
Comment (Exploration): Status = Inactive
References
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): 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.
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.
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.
