Unnamed

The Unnamed 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed

Commodity

Primary: Copper

Location

State: Alaska
District: Bering Sea

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

Model Name: Porphyry Cu

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Alteration has not been described.

Rocks

Role: Host
Age Type: Host Rock
Age in Years: 108.000000+-3.200000
Age Young: Early Cretaceous

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Gangue: Pyrite

Comments

Comment (Geology): Age = Mid-Cretaceous, the age of the host Sevuokuk pluton (108 +/- 3.2 Ma; Patton and Csejtey, 1980).

Comment (Reference): Primary Reference = Patton and Csejtey, 1971(PP 684-C)

Comment (Workings): Workings / Exploration = One grab sample contained 1,000 ppm copper, 15 ppm molybdenum, and 1.5 ppm silver (Patton and Csejtey, 1971, p. C8).

Comment (Geology): Geologic Description = Chalcopyrite mineralization here is in the Sevuokuk pluton, a mid-Cretaceous (108 +/- 3.2 Ma) composite body that includes biotite hornblende quartz monzonite and biotite quartz monzonite phases (Csejtey, Patton, and Miller, 1971; Patton and Csejtey, 1980). At this site, pyrite and chalcopyrite are disseminated in botite quartz monzonite. One grab sample contained 1,000 ppm copper, 15 ppm molybdenum, and 1.5 ppm silver (Patton and Csejtey, 1971, p. C8). Other characteristics of this site, such as size and alteration, have not been described.

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Fracture fillings, veins, and disseminations of chalcopyrite in granitic rock. Deposit model 17 (?); porphyry Cu

Comment (Geology): Age = Chron age is for Host Rock.

References

Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1980, Geologic map of St. Lawrence Island, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1203, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1971, Preliminary geologic investigations of western St. Lawrence Island, Alaska: U.S. Geological Survey Professional Paper 684-C, p. C1-C15.

Reference (Deposit): Csejtey, Bela, Jr., Patton, W.W., Jr., and Miller, T.P., 1971, Cretaceous plutonic rocks of St. Lawrence Island, Alaska, a preliminary report: U.S. Geological Survey Professional Paper 750-D, p. D68-D76.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1 sheet, scale 1:250,000.

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