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Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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