The Mammoth is a 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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Mammoth MRDS details
Site Name
Primary: Mammoth
Commodity
Primary: Gold
Secondary: Copper
Location
State: Alaska
District: Willow Creek
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chalcopyrite
Ore: Gold
Gangue: Quartz
Comments
Comment (Geology): Age = Late Cretaceous or younger; the quartz body is in the Late Cretaceous Willow Creek Pluton.
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = Capp (1915) reported that a 285 ft tunnel with crosscuts and a raise had been developed by 1913. It was later added onto with 100 ft of additional tunnel (Capps, 1916). Extension of the quartz body was never found.
Comment (Reference): Primary Reference = Capps, 1915
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins ? (Cox and Singer, 1986; model 36a ?)
Comment (Geology): Geologic Description = Quartz body 28 to 30 ft wide in quartz diorite of the Late Cretaceous Willow Creek Pluton. The quartz contains gold, pyrite, chalcopyrite, and copper carbonates. The quartz body strikes east and dips 68 N. The quartz body is faulted away about 30 ft from entrance to tunnel and further investigation could not locate any extensions of the quartz body (Capps, 1915).? the Willow Creek Pluton is a zoned pluton: the outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite. Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).
Comment (Commodity): Ore Material = copper carbonates
Comment (Commodity): Ore Material = copper carbonates
References
Reference (Deposit): Capps, S.R., 1916, Gold mining in the Willow Creek district: U.S. Geological Survey Bulletin 642-E, p. 147-200.
Reference (Deposit): Capps, S.R., 1916, Gold mining in the Willow Creek district: U.S. Geological Survey Bulletin 642-G, p. 147-194, 195-200.
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.
Reference (Deposit): Capps, S.R., 1914, Gold lodes and placers of the Willow Creek district: U.S. Geological Survey Bulletin 592, p. 245-272.
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): Chapin, Theodore, 1921, Lode developments in the Willow Creek district: U.S. Geological Survey Bulletin 714-E, p. 201-206.
Reference (Deposit): Capps, S.R., 1915, The Willow Creek District, Alaska: U.S. Geological Survey Bulletin 607, 86 p.
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