The Moghoweyik River is a molybdenum 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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Moghoweyik River MRDS details
Site Name
Primary: Moghoweyik River
Commodity
Primary: Molybdenum
Location
State: Alaska
District: Bering Sea
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 Mo, low-F
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Pyrite is apparently abundant and disseminated in the biotite quartz monzonite as well as accompanying molybdenite in veins. Pyrite oxidation is well-developed and other alteration is probably present although not described.
Rocks
Role: Host
Age Type: Host Rock
Age in Years: 108.000000+-3.200000
Age Young: Early Cretaceous
Analytical Data
Not available
Materials
Ore: Molybdenite
Gangue: Pyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Mid-Cretaceous, the age of the host Sevuokuk pluton (108 +/- 3.2 Ma; Patton and Csejtey, 1980).
Comment (Reference): Primary Reference = Patton and Csejtey, 1971 (PP 684-C)
Comment (Geology): Geologic Description = Molybdenite mineralization here is in the Sevuokuk pluton, a mid-Cretaceous (108 +/- 3.2 Ma) composite body that includes biotite hornblende quartz monzonite and biotite quartz monzonite phases (Csejtey, Patton, and Miller, 1971; Patton and Csejtey, 1980). At this site, molybdenite occurs in thin veinlets cutting highly oxidized pyritiferous biotite quartz monzonite. The quartz monzonite is also cut by quartz veins and aplite dikes (Patton and Csejtey, 1971, p. C10). Three grab samples contained 7, 500, and 1,500 ppm molybdenum and 700, 150, and 15 ppm copper respectively (Patton and Csejtey, 1971. p. C8). A pan concentrate from the riverbed gravels at this locality contained 70 ppm molybdenum and 5,000 ppm tungsten (Patton and Csejtey, 1971, p. C10).
Comment (Deposit): Model Name = Fracture fillings, veins, and disseminations of moyldenite in granitic rock. Deposit model 21b (?); porphyry Mo, low-F
Comment (Workings): Workings / Exploration = Three grab samples contained 7, 500, and 1,500 ppm molybdenum and 700, 150, and 15 ppm copper respectively (Patton and Csejtey, 1971. p. C8). A pan concentrate from the riverbed gravels at this locality contained 70 ppm molybdenum and 5,000 ppm tungsten (Patton and Csejtey, 1971, p. C10).
Comment (Geology): Age = Chron age is for Host Rock.
References
Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1971, Preliminary geologic investigations of western St. Lawrence Island, Alaska: U.S. Geological Survey Professional Paper 684-C, p. C1-C15.
Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1980, Geologic map of St. Lawrence Island, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1203, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1:250,000 scale.
Reference (Deposit): Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.
Reference (Deposit): Csejtey, Bela, Jr., Patton, W.W., Jr., and Miller, T.P., 1971, Cretaceous plutonic rocks of St. Lawrence Island, Alaska, a preliminary report: U.S. Geological Survey Professional Paper 750-D, p. D68-D76.
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