Unnamed (on Raggedtop Mountain)

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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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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