Unnamed (south of Flat Creek)

The Unnamed (south of Flat Creek) is a copper 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 (south of Flat Creek)

Commodity

Primary: Copper
Secondary: Gold
Secondary: Tungsten
Secondary: Lead

Location

State: Alaska
District: Chistochina

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 Cu-Mo

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Tourmaline.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Gangue: Quartz
Gangue: Tourmaline

Comments

Comment (Geology): Age = Probably coeval with a Jurassic diorite to quartz-diorite complex.

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Richter, 1966

Comment (Geology): Age = Emplaced subseqent to or is related to the border phase of the Pennsylvanian to Permian, Ahtell pluton.

Comment (Workings): Workings / Exploration = The area has been explored intermittently by reconnaissance mapping, sampling, and minor bulldozer trenching since about 1963.

Comment (Geology): Geologic Description = The area consists mainly of the Grubstake, medium-grained quartz monzonite phase of the Pennsylvanian to Permian, Ahtell pluton and its quartz-rich border phase (Richter, 1966). The area has widespread mineralization. Richter (1966 fig. 5) mapped a prospect with a sulfide-bearing quartz-carbonate vein at an elevation of about 3,400 feet in the drainage north of the ridge. Rocks nearby contain disseminated chalcopyrite. WGM Inc. (WGM Inc., 1980) mapped a half-mile-long altered area containing sulfide veins centered on this location. Stream sediments in the drainage below Richter's prospect contained 700 ppb gold and the south-draining stream from the ridge contained 300 ppm tungsten. Kirk Stanley (written communication, 2000) reported the existence of tourmaline and silver-lead veins on the Grizzly Hills but without specifying an exact location.

Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)

Comment (Deposit): Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Comment (Commodity): Gangue = Carbonate

References

Reference (Deposit): Richter, D.H., and Matson, N.A., Jr., 1972, Metallic mineral resources map of the Gulkana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-419, 1 sheet, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Gulkana quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1247, 36 p.

Reference (Deposit): WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., 1:63,360-scale map. (Report held by Ahtna Mineral Co., Anchorage, Alaska).

Reference (Deposit): Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.

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