The Flat Creek and Marietta Basin 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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Flat Creek and Marietta Basin MRDS details
Site Name
Primary: Flat Creek and Marietta Basin
Secondary: Marietta
Secondary: Flat Creek
Commodity
Primary: Gold
Secondary: Antimony
Secondary: Tungsten
Secondary: Mercury
Location
State: Alaska
District: Iditarod
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Cinnabar
Ore: Gold
Ore: Scheelite
Ore: Stibnite
Comments
Comment (Deposit): Other Comments = Lower 4 mi. of valley has gradient of about 100 ft./mile; Uppermost mile of valley drops approximately 1000 ft.
Comment (Deposit): Model Name = placer: residual, eluvial, stream, bench
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Bundtzen and others, 1992
Comment (Geology): Geologic Description = Deeply weathered monzonite stock at head of Flat Creek constitutes a residual placer, which grades downstream into alluvial placers and then into bench and stream placers. Best pay is 3-4 mi. above mouth. Gold from benches is coarser and higher grade than gold from creek gravel. Mertie (1936) reported average fineness of 878 parts Au and 114 parts Ag.
Comment (Commodity): Gangue = Concentrates contain arsenopyrite.
Comment (Workings): Workings / Exploration = Surface; extensive dredging; actively mined during 1994.
Comment (Geology): Age = Tertiary/Quaternary
Comment (Production): Production Notes = Mined by dredge 1915-56; further mining 1970-86. Recorded production is 477,039 oz. Au; considered minimum estimate.
References
Reference (Deposit): Smith, P.S., 1917, The Lake Clark-Central Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 655, 162 p., 2 sheets, scale 1:250,000.
Reference (Deposit): Bundtzen, T.K., Miller, M.L., Laird, G.M., and Bull, K.F., 1992, Geology and mineral resources of Iditarod mining district, Iditarod B-4 and eastern B-5 quadrangles, southwestern Alaska: Alaska Division of Geological and Geophysical Surveys Professional Report 97, 46 p., 2 sheets, scale 1:63,360.
Reference (Deposit): Miller, M.L., Bundtzen, T.K., Keith, W.J., Bailey, E.A., Bickerstaff, Damon, 1996, Geology and mineral resources of the Stuyahok area, part of Holy Cross A-4 and A-5 quadrangles, Alaska: U.S. Geological Survey Open-File Report 96-505-A, 30 p.
Reference (Deposit): Swainbank, R.C., Bundtzen, T.K., Clough, A.H., Henning, M.W., and Hansen E.W., 1995, Alaska's mineral industry 1994: Alaska Division of Geological and Geophysical Surveys Special Report 49, 77 p.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction material) in the Iditarod and Ophir quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-576, 101 p.
Reference (Deposit): Mertie, J.B., Jr., and Harrington, G.L., 1916, Mineral resources of the Ruby-Kuskokwim region, in Brooks, A.H., and others, Mineral Resources of Alaska, Report on Progress of Investigations in 1915: U.S. Geological Survey Bulletin 642, p. 223-266.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Iditarod quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-363, 1 sheet, scale 1:250,000.
Reference (Deposit): Mertie, J.B., Jr., 1936, Mineral deposits of the Ruby-Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 864-C, 115-245.
Reference (Deposit): Smith, P.S., 1917, The Lake Clark-central Kuskokwim region, Alaska: U.S. Geological Survey Bulletin 655, 192 p.
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