The Unnamed (near Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border) is a copper and gold 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
Name: Unnamed (near Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border)
State: Alaska
County: na
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 Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border) MRDS details
Site Name
Primary: Unnamed (near Hill 5605 above Alsek River and within about 2 miles of the U.S.-Canada border)
Commodity
Primary: Copper
Primary: Gold
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: The occurrence is a hydrothermally altered zone, of unspecified type, in an intrusion.
Rocks
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Deposit): Model Name = Shear zone
Comment (Deposit): Other Comments = Proposed as an occurrence because of the width of the anomalous zone (100 feet) suggesting more detailed sampling could be warranted. The site is in Tongass National Forest and appears to be open for mineral location.
Comment (Reference): Primary Reference = MacKevett and Plafker, 1970.
Comment (Workings): Workings / Exploration = Surface exposures only. MacKevett and Plafker (1970, table 1) reported 0.08 ppm gold and 200 ppm copper in sample 68APr85E. The occurrence was cited in Cobb (1972; 1979).
Comment (Geology): Age = Cretaceous or younger
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = The area is mainly underlain by schists of uncertain age, possibly Mesozoic or older, but also possibly metamorphosed Yakutat Group rocks of Jurassic and Cretaceous age. These rocks are cut by a granitic rock of Cretaceous or Tertiary age, part of an extensive pluton mostly exposed south of the large unnamed glacier south of the occurrence (MacKevett and Plafker, 1970). The mineral occurrence constitutes a hydrothermally altered zone about 100 feet wide in quartz diorite. A representative sample of the zone contained 0.08 ppm gold and 200 ppm copper.
References
Reference (Deposit): MacKevett, E.M., Jr., and Plafker, G., 1970, Geochemical and geophysical reconnaissance of parts of the Yakutat and Mount St. Elias quadrangles, Alaska: U.S. Geological Survey Bulletin 1312-L, 12 p.
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bering Glacier, Icy Bay, Middleton Island, and Yakutat quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-1246, 41 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Yakutat quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-408, 1 sheet, scale 1:250,000.
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