The Smith Lake is a zinc, lead, silver, and copper 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
Elevation:
Commodity: Zinc, Lead, Silver, Copper
Lat, Long: 62.328, -153.73800
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Smith Lake MRDS details
Site Name
Primary: Smith Lake
Commodity
Primary: Zinc
Primary: Lead
Primary: Silver
Primary: Copper
Secondary: Bismuth
Secondary: Cobalt
Location
State: Alaska
District: McGrath
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Siderite alteration.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Galena
Ore: Chalcopyrite
Gangue: Siderite
Gangue: Clinopyroxene
Comments
Comment (Reference): Primary Reference = Bundtzen, Kline, and Clough, 1982
Comment (Deposit): Model Name = Polymetallic veins (Cox and Singer, 1986; model 22c).
Comment (Workings): Workings / Exploration = Some time prior to 1980, an 8 meter long adit was driven into the sulfide-rich shear zone. Selected chip-channel samples reported by Bundtzen, Kline, and Clough (1982) and Smith and Albanese (1985) contained up to 1.05 percent copper, 1.74 percent lead, 5.22 percent zinc, 42.0 grams/tonne silver, 100 ppm cobalt, and 100 ppm bismuth. A 0.3 meter channel sample collected by Brewer and others (1992) contained 14.8 percent lead, 10.6 percent zinc, 0.6 percent copper, and 90.2 grams/tonne silver.
Comment (Geology): Geologic Description = The Smith Lake prospect consists of a high angle, sulfide-rich shear zone in mid-Silurian clastics of the Terra Cotta Sandstone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). The shear (fault) zone trends N45E, dips steeply to vertically, and ranges from 0.5 to one meter wide. An adit has been driven into the mineralized zone and explored about 8 meters of the sulfide-vein along strike. . Principle sulfides include abundant pyrrhotite, which comprises up to 75 percent of the total sulfides, and minor amounts of pyrite, chalcopyrite, galena and sphalerite. The gangue material contains significant secondary siderite and highly deformed clinopyroxene. Selected chip-channel samples reported by Bundtzen, Kline, and Clough (1982) and Smith and Albanese (1985) contained up to 1.05 percent copper, 1.74 percent lead, 5.22 percent zinc, 42.0 grams/tonne silver, 100 ppm cobalt, and 100 ppm bismuth. A 0.3 meter channel sample collected by Brewer and others (1992) contained 14.8 percent lead, 10.6 percent zinc, 0.6 percent copper, and 90.2 grams/tonne silver.
Comment (Exploration): Status = Inactive
Comment (Deposit): Other Comments = the Smith Lake mineralization is not typical of other silver-polymetallic prospects in Farewell Mineral Belt.
References
Reference (Deposit): Bundtzen, T.K., Kline, J.T., and Clough, J.G., 1982, Preliminary geologic map of the McGrath B-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File report 149, 22 pages, one sheet, scale 1:63,360.
Reference (Deposit): Brewer, N.H., Puchner, C.C., and Gemuts, I., 1992, Farewell district, southwest Alaska Range: North Pacific Mining Company prospectus report, 21 pages
Reference (Deposit): Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic Map of the eastern McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14, 34 pages, one sheet, scale 1:125,000.
Reference (Deposit): Smith, T.E., and Albanese, M.D., 1985, Preliminary prospect examinations in the McGrath B-2, A-3, and A-4 quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 85-54, 19 pages.
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