The Little Gem (Hatcher) 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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Little Gem (Hatcher) MRDS details
Site Name
Primary: Little Gem (Hatcher)
Secondary: Little Gem Gold Mining Company
Commodity
Primary: Gold
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 vein 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: Gold
Gangue: Quartz
Comments
Comment (Reference): Primary Reference = Capps, 1919
Comment (Workings): Workings / Exploration = Staked in 1913. Development included two tunnnels, 25 ft and 60 ft in length. Mill and material for tram was present but not installed in 1917 (Capps, 1915; 1919). Probably eventually became part of the Fern property - ARDF number AN005 (Cobb, 1979).
Comment (Production): Production Notes = Unknown.
Comment (Geology): Geologic Description = A 1 to 10 inch thick quartz vein cuts quartz diorite of the Late Cretaceous Willow Creek Pluton. The vein contains a very rich streak, 1/2 to 2 inches thick, with abundant coarse specks of free gold. The vein is reportedly traceable for 1,500 ft (Capps, 1915; 1919).? 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 vein 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 (Deposit): Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Late Cretaceous or younger; vein cuts the Late Cretaceous Willow Creek Pluton.
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): Capps, S.R., 1914, Gold lodes and placers of the Willow Creek district: U.S. Geological Survey Bulletin 592, p. 245-272.
Reference (Deposit): Capps, S.R., 1919, Gold lode mining in the Willow Creek district: U.S. Geological Survey Bulletin 692-D, p. 177-186.
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): Chapin, Theodore, 1920, Lode developments in the Willow Creek district: U.S. Geological Survey Bulletin 712-F, p. 169-176.
Reference (Deposit): Ray, R.G., 1954, Geology and ore deposits of the Willow Creek Mining district, Alaska: U.S. Geological Survey Bulletin 1004, 86 p.
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): Capps, S.R., 1915, The Willow Creek District, Alaska: U.S. Geological Survey Bulletin 607, 86 p.
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