The Tin Creek-North is a copper, silver, zinc, and lead 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: Copper, Silver, Zinc, Lead
Lat, Long: 62.455, -153.69400
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Tin Creek-North MRDS details
Site Name
Primary: Tin Creek-North
Commodity
Primary: Copper
Primary: Silver
Primary: Zinc
Primary: Lead
Secondary: Cadmium
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: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Skarn Cu
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Epidotization.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Galena
Ore: Chalcopyrite
Ore: Marmatite
Ore: Sphalerite
Ore: Pyrite
Gangue: Johannsenite
Gangue: Garnet
Gangue: Epidote
Comments
Comment (Workings): Workings / Exploration = The Tin Creek-North occurrence was first described in Bundtzen, Kline, and Clough (1982). One grab sample contained 2.25 percent copper, 1.21 percent lead, 0.11 percent zinc, 0.13 percent cadmium, and 319.8 grams/tonne silver (Bundtzen, Kline, and Clough, 1982; Szumigala, 1987).
Comment (Geology): Geologic Description = The Tin Creek-North occurrence consists of thin, 5 to 20 centimeter thick mineral veins containing johansenite, garnet, sphalerite (marmatite), and chalcopyrite in argillaceous limestone of the mid-Silurian Terra Cotta Mountains Sandstone a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). . The mineralization is hosted within a thermally altered zone where prograde garnet-johansenite veins are cut by epidote replacement bodies that are accompanied by sulfide minerals. The sulfide skarns are near a 29 Ma granidiorite dike which is part of a larger, 5 kilometer wide, N70W-trending dike swarm which intrudes the Dillinger subterrane. One grab sample contained 2.25 percent copper, 1.21 percent lead, 0.11 percent zinc, 0.13 percent cadmium, and 319.8 grams/tonne silver (Bundtzen, Kline, and Clough, 1982; Szumigala, 1987).
Comment (Deposit): Model Name = Copper-iron skarn (Cox and Singer, 1986; model 18b).
Comment (Deposit): Other Comments = See MG042, Tin Creek-Midway (MG043) and Tin Creek-South (MG046) prospects.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Inferred to be 29 Ma, based on age date from nearby granodiorite dike (Solie and others, 1991).
Comment (Reference): Primary Reference = Bundtzen, Kline, and Clough, 1982
References
Reference (Deposit): Szumigala, D.J., 1987, Geology of the lead-zinc skarn deposits at Tin Creek area, McGrath B-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 87-5, 21 pages, one sheet, 1:10,000 scale.
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): 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.
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