The Unnamed (near Coal Creek) is a tin 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 (near Coal Creek) MRDS details
Site Name
Primary: Unnamed (near Coal Creek)
Secondary: Coal Creek
Commodity
Primary: Tin
Secondary: Silver
Secondary: Molybdenum
Secondary: Zinc
Secondary: Tungsten
Secondary: Gold
Secondary: Copper
Location
State: Alaska
District: Valdez Creek
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: Porphyry Sn
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Sericitic alteration; alteration of granite to tourmaline, quartz, topaz (greisen)
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Sphalerite
Ore: Silver
Ore: Pyrrhotite
Ore: Pyrite
Ore: Fluorite
Ore: Cassiterite
Gangue: Quartz
Gangue: Sericite
Gangue: Topaz
Gangue: Tourmaline
Comments
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = Type of workings: Surface exploration and drilling.
Comment (Reference): Primary Reference = Reed, 1978
Comment (Deposit): Other Comments = 200-2000 ppm Sn, 2.9-4.3 oz/ton Ag (Reed, 1978); up to 65 ppm Ag, 0.5 ppm Au, 328 ppm Pb, 720 ppm W, and >1.0% Zn in analyses of selected rock samples (Balen, 1990).
Comment (Geology): Geologic Description = Host rock is alaskite (albite granite) of Tertiary age. Sulfides and cassiterite occur as disseminated grains and in greisen veinlets and stockworks in the granite. Fluorite occurs in veins in the granite as well. Thin sections indicate the granite in the zones of stockworks and veins has undergone several episodes of hydrothermal brecciation "&" alteration.
Comment (Deposit): Model Name = Porphyry tin (Cox and Singer, 1986; model 20a)
Comment (Geology): Age = Tertiary
References
Reference (Deposit): Cobb, E.H., and Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p.
Reference (Deposit): Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected nonmetalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-588-Q, 33 p., 1 plate, scale 1:250,000.
Reference (Deposit): Reed, B.L., 1978, A disseminated tin occurrence near Coal Creek, Talkeetna Mountains D-6 quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-77, 8 p.
Reference (Deposit): Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 20 p., 1 plate, scale 1:250,000.
Reference (Deposit): Kurtak, J.M., Southworth, D.D., Balen, M.D., and Clautice, K.H., 1992, Mineral investigations in the Valdez Creek mining district, south-central Alaska: U.S. Bureau of Mines Open-File Report 1-92, 659 p., 2 plates, scale 1:250,000.
Reference (Deposit): Balen, M.D., 1990, Geochemical sampling results from the Bureau of Mines investigations in the Valdez Creek mining district, Alaska: U.S. Bureau of Mines Open-File Report 34-90, 218 p., 2 plates, scale 1:250,000.
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