The Unnamed (near Iceberg Point, Lemesurier Island) is a molybdenum and copper 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 Iceberg Point, Lemesurier Island) MRDS details
Site Name
Primary: Unnamed (near Iceberg Point, Lemesurier Island)
Commodity
Primary: Molybdenum
Primary: Copper
Location
State: Alaska
District: Chichagof
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
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: Development of tactite in limestone.
Rocks
Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Silurian
Analytical Data
Not available
Materials
Ore: Bornite
Ore: Chalcopyrite
Ore: Molybdenite
Gangue: Calcite
Gangue: Epidote
Gangue: Garnet
Gangue: Quartz
Comments
Comment (Geology): Age = Cretaceous or younger.
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Buddington, 1926; Smith, 1942
Comment (Deposit): Other Comments = the prospect is in a carbonate terrane of Paleozoic age. The prospect is in Tongass National Forest and appears to be open for mineral location. Claim activity is unknown.
Comment (Commodity): Gangue = paligorskite
Comment (Deposit): Model Name = Distal tactite, suspected intrusion not exposed.
Comment (Workings): Workings / Exploration = Surface exposures of copper and molybdenum minerals were explored by trenches and cuts dug by long-time southeast Alaska prospector Joe Ibach, who occasionally lived on the island. The occurrence was first reported by Buddington (1926). It was also listed by Buddington and Chapin (1929) and briefly described by Smith (1942, p. 177).
Comment (Production): Production Notes = Production of paligorskite, probably as mineral specimens by Ibach.
Comment (Geology): Geologic Description = The occurrence is in limestone of Paleozoic age which, elsewhere on Lemesurier Island, is cut by granitic intrusions. The mineral suite reported at the locality--quartz, garnet, epidote, pyroxene, calcite, molybdenite, chalcopyrite, and bornite--(Smith, 1942, p. 177) is a tactite suite, probably related to a nearby intrusion. An unusual asbestos-like mineral, paligorskite, called mountain leather, formed as replacement of limestone near copper-molybdenum bearing vein occurrences. Paligorskite masses reportedly were mined by Joe Ibach. ? the site is about three-quarters of a mile east-northeast of the Whitney claims (MF079) another occurrence of copper-molybdenum minerals on the island.
References
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mt. Fairweather and Skagway quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-316, 123 p.
Reference (Deposit): Smith, P.S., 1942, Occurrences of molybdenum in Alaska: U.S. Geological Survey Bulletin 926-C, p. 161-210.
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): Buddington, A.F., and Chapin, Theodore, 1929, Geology and mineral deposits of southeastern Alaska: U.S. Geological Survey Bulletin 800, 398 p.
Reference (Deposit): Buddington, A.F., 1926, Mineral investigations in southeastern Alaska: U.S. Geological Survey Bulletin 783, p. 41-62.
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.