The Makushin Valley NC is a gold and silver 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 NC MRDS details
Site Name
Primary: Makushin Valley NC
Commodity
Primary: Gold
Primary: 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: Epithermal vein, generic
Model Name: Porphyry Cu
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Diorite shows alteration to epidote and chlorite, probably propylitic alteration. Partial leaching reported reported but not of what was leached.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Gangue: Magnetite
Comments
Comment (Workings): Workings / Exploration = Six samples collected showed very low silver, gold, copper, and molybdenum, probably not much above background.
Comment (Reference): Primary Reference = Christie, 1974
Comment (Geology): Geologic Description = Small color anomaly in Unalaska Formation (see Drewes and others, 1961) at contact with porphyritic diorite. Diorite has miarolitic cavities and contains less than 0.5 percent pyrite and abundant magnetite. Christie (1974) reports this as a small system, yet in notes indicates it is a 1 mile (1.6 km) by 0.5 mile (800 m) northeast trending zone.
Comment (Deposit): Model Name = Copper porphyry(?) or epithermal vein(?)
Comment (Deposit): Model Number = 17, 25
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Reference (Deposit): Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps.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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