Fourth of July Creek

The Fourth of July 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

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: Fourth of July Creek
Secondary: Woodin and Herman

Commodity

Primary: Copper

Location

State: Alaska
District: Nizina

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: Basaltic Cu (BC name is Volcanic redbed Cu)

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Oxidation of Cu minerals.

Rocks

Name: Greenstone
Role: Associated
Age Type: Associated Rock
Age Young: Late Triassic

Name: Greenstone
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Triassic

Analytical Data

Not available

Materials

Ore: Bornite
Ore: Chalcopyrite
Ore: Malachite

Comments

Comment (Workings): Workings / Exploration = Short adit and remnants of numerous surface workings.

Comment (Reference): Primary Reference = Moffit and Maddren, 1909

Comment (Deposit): Model Name = Basaltic Cu

Comment (Geology): Geologic Description = Chiefly secondary copper minerals on joints and minor faults in Triassic Nikolai Greenstone.

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Moffit, F.H., and Maddren, A.G., 1909, Mineral resources of the Kotsina-Chitina region, Alaska: U.S. Geological Survey Bulletin 374, 103 p.

Reference (Deposit): Miller, D.J., 1946, Copper deposits of the Nizina district, Alaska: U.S. Geological Survey Bulletin 947F, p. 93-120.

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): MacKevett, E.M., Jr., 1972, Geologic map of the McCarthy C-6 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-979, scale 1:63,360.

Reference (Deposit): MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.

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