The Unnamed (near Metlakatla) is a molybdenum, 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
Elevation:
Commodity: Molybdenum, Gold, Silver
Lat, Long: 55.118, -131.54300
Map: View on Google Maps
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Unnamed (near Metlakatla) MRDS details
Site Name
Primary: Unnamed (near Metlakatla)
Commodity
Primary: Molybdenum
Primary: Gold
Primary: Silver
Location
State: Alaska
District: Ketchikan
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: Sheared granitic hostrock is silicified and/or sericitized, and permeated with hydrothermal hematite.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Comments
Comment (Workings): Workings / Exploration = A sample of hematitic granitic rock contained 0.28 ppm Au and 5 ppm Ag; a sample from a pyrite seam contained 0.7 ppm Ag and 20 ppm Mo (Karl, 1992, loc. 44).
Comment (Deposit): Model Name = Disseminated sulfide and iron mineralization of undetermined origin in granitic rock.
Comment (Geology): Geologic Description = The country rock in the area of this site is Silurian trondhjemite (Berg, 1972 [I 684]; Berg and others, 1988). The site is in or near a major N-S fault zone between mainland Annette Island and the peninsula containing the town of Metlakatla. The trondhjemite in and near this zone is intensely sheared and brecciated, with widespread sericitization, silicification, and formation of hydrothermal(?) potassium feldspar and specular hematite. Some of these features probably are due to Late Cretaceous greenschist-grade regional metamorphism, and some to subsequent large-scale faulting. The occurrence consists of disseminated pyrite and hematite, and of thin seams of pyrite, in a 1000-foot-wide zone of cataclastic, pervasively altered, granitic rock (Karl, 1992, loc. 44). A sample of hematitic granitic rock contained 0.28 ppm Au and 5 ppm Ag; a sample from a pyrite seam contained 0.7 ppm Ag and 20 ppm Mo.
Comment (Geology): Age = Probably Late Cretaceous or younger.
Comment (Reference): Primary Reference = Karl, 1992
References
Reference (Deposit): Berg, H.C., 1972, Geologic map of Annette Island, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-684, 8 p., 1 sheet, scale 1:63,360,
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
Reference (Deposit): Karl, S.M., 1992, Map and table of mineral deposits on Annette Island, Alaska: U.S. Geological Survey Open-File Report 92-690, 57 p., 1 map, scale 1:63,360.
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