The Unnamed (on Raggedtop Mountain) is a lead, 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
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Unnamed (on Raggedtop Mountain) MRDS details
Site Name
Primary: Unnamed (on Raggedtop Mountain)
Commodity
Primary: Lead
Primary: Gold
Primary: Silver
Location
State: Alaska
District: Anchorage
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
Model Name: Low-sulfide Au-quartz vein, Chugach-type
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: The intrusive rocks have undergone argillic alteration. Oxidation of iron minerals.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Galena
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Park, 1933
Comment (Workings): Workings / Exploration = Vein exposed in a 2 ft open cut. Samples taken indicate 0.01 oz/ton Au, 1.4 oz/ton Ag, and 1.12 percent Pb (Park, 1933).
Comment (Deposit): Model Name = Chugach-type low-sulfide Au-quartz veins (Bliss, 1992; model 36a.1)
Comment (Geology): Geologic Description = According to Park (1933) a quartz vein, apparently shattered from postmineral movement, cuts Late Cretaceous metasedimentary rocks of the Valdez Group. The metasedimentary rocks are in close proximity to quartz diorite or dacite dikes, sills, irregular pipes, or plugs. The vein strikes N 50 W, dips 40 W, and ranges from 1-24 inches thick with about 7 inches being the average thickness. The vein contains galena, pyrite, and limonite. Numerous small mineralized stringers were seen on the steep mountain side south of this location. Samples taken indicate 0.01 oz/ton Au, 1.4 oz/ton Ag, and 1.12 percent Pb (Park, 1933). Other nearby small prospects have several small but well-mineralized quartz veins that cut both intrusive and metasedimentary rocks.
Comment (Geology): Age = Tertiary or younger; veins cut Late Cretaceous Valdez Group rocks and Teriary intrusive rocks.
References
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.
Reference (Deposit): Clark, S.H.B., and Yount, M.E., 1972, Reconnaissance geologic map and geochemical analyses of stream-sediment and rock samples of the Anchorage A-6 Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 351, 2 sheets, scale 1:63,360.
Reference (Deposit): Park, F.C., 1933, The Girdwood District, Alaska: U.S. Geological Survey Bulletin 849-G, p. 381-424.
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