The Synneva (Scynneva) Creek 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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Synneva (Scynneva) Creek MRDS details
Site Name
Primary: Synneva (Scynneva) Creek
Commodity
Primary: Gold
Secondary: Tungsten
Secondary: Tin
Location
State: Alaska
District: Bristol Bay
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
Alteration Type: L
Alteration Text: Not applicable
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Scheelite
Ore: Gold
Ore: Cassiterite
Comments
Comment (Workings): Workings / Exploration = Work began in about 1957, and was limited to hand methods (ground-sluice and shovel-in). One man worked the mouth of the narrow gulch moving about 800 to 900 cubic yards, from which an unconfirmed $1,200 was recovered. There was no evidence to indicate that bedrock had been reached (Jasper, 1961).? Analysis of heavy concentrates yield 60 percent cassiterite and 1.36 percent tungsten (Eakins and others, 1978).
Comment (Production): Production Notes = Jasper (1961) mentioned about 35 oz Au production, but probably much more was unreported (Eakins and others, 1978).
Comment (Exploration): Status = Probably inactive
Comment (Geology): Geologic Description = Synneva (Scynneva) Creek is a placer gold deposit. Analysis of heavy concentrates yield 60 percent cassiterite and 1.36 percent tungsten (Eakins and others, 1978). Jasper (1961) reported: evidence indicates that glacial scouring was not an important erosional factor in this area, it is believed that pre-glacial alluvials were undisturbed, and that placer gold concentrations remain more or less as originally deposited along the creek. The valley alluvials are mostly uniform gravels with some boulders, interpreted as reworked glacial deposits. Bedrock is shale, argillite, and graywacke cut by porphyritic granitic dikes. The sediments strike N 40 to 45 E, and dip varies from 60 to 75 SW.
Comment (Reference): Primary Reference = Eakins and others, 1978
Comment (Reserve-Resource): Reserves = No reserves
Comment (Deposit): Model Name = Placer Au (Cox and Singer, 1986; model 39a)
Comment (Deposit): Other Comments = Essentially part of the Bonanza Creek placer deposit.
Comment (Geology): Age = Quaternary.
References
Reference (Deposit): Jasper, M.W., 1961, Bonanza Creek placers, Lake Clark quadrangle, in Williams, J.A., Report of the Division of Mines and Minerals for the year 1961: Alaska Division of Mines and Minerals Annual Report, p. 58-64.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-378, 1 sheet, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.
Reference (Deposit): Eakins, G.R., Gilbert W.G., and Buntzen, T.K., 1978, Preliminary bedrock geology and mineral resource potential of west-central Lake Clark quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 118, 15 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-378, 1 sheet, scale 1:250,000.
Reference (Deposit): Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485, 101 p.
Reference (Deposit): Nelson, W.H., King, H.D., Case, J.E., Tripp, R.B., Crim, W.D., and Cooley, E.F., 1985, Mineral resource map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-B, 1 sheet, scale 1:250,000.
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