Makushin River

The Makushin River is a silver and gold 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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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: Makushin River

Commodity

Primary: Silver
Primary: Gold

Location

State: Alaska
District: Aleutians

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: Epithermal vein, generic

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Argillic alteration is characteristic with there being local development of silicification and sericitic alteration. Leaching (of sulfides?) is complete in fractures and only partial where they are disseminated (Christie, 1974).

Rocks

Not available

Analytical Data

Not available

Materials

Gangue: Pyrite
Gangue: Pyrrhotite

Comments

Comment (Deposit): Model Name = Epithermal gold vein(?)

Comment (Reference): Primary Reference = Christie, 1974

Comment (Workings): Workings / Exploration = Limited reconnaissance mapping and 8 soil(?) samples. Samples contained up to 2.4 ppm silver, one contained 0.44 ppm gold.

Comment (Geology): Geologic Description = A pale yellow-brown to dark red-brown color anomaly 3,000 ft (900 m) in diameter located in volcanic flows and pyroclastic rocks of the Unalaska Formation (see Drewes and others, 1961) is reported by Christie (1974). These volcanic rocks are intruded by numerous small dikes and plugs of diorite containing sparse disseminated pyrite. Post-mineralization andesite and gabbro dikes are present. "Fracture sulfides were important in several areas that are now totally leached. No evidence for copper mineralization was seen there or elsewhere in the system (Christie, 1974)."

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Cenozoic

References

Reference (Deposit): Drewes, Harold, Fraser, G.D., Snyder, G.L., and Barnett, H.F., Jr., 1961, Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska: U.S. Geological Survey Bulletin 1028-S, p. 583-676.

Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

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