Makushin Valley SE

The Makushin Valley SE 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: Makushin Valley SE

Commodity

Primary: Copper
Secondary: Silver

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: Porphyry Cu

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Possibly propylitic and argillic alteration. Partial leaching, fractures largely leached.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Gangue: Magnetite

Comments

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Copper porphyry

Comment (Geology): Geologic Description = Color anomaly in Unalaska Formation (see Drewes and others, 1961) associated with porphyritic diorite. Diorite is weakly altered, contains miarolitic cavities, less than 0.5 percent pyrite and more than 2 percent magnetite. Fracturing is local strongly developed ans strikes east and northeast. No chalcopyrite seen. Zone containing more than 2 percent pyrite is roughly 600 ft (180 m) by 4,000 ft (1220 m).

Comment (Reference): Primary Reference = Christie, 1974

Comment (Workings): Workings / Exploration = Single sample reported, reconnaissance mapping. Sample showed 90 ppm copper and 1.4 ppm silver.

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Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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