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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Makushin River MRDS details
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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