The Little Bird is a silver, zinc, 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
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Little Bird MRDS details
Site Name
Primary: Little Bird
Commodity
Primary: Silver
Primary: Zinc
Primary: Copper
Secondary: Tungsten
Secondary: Lead
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: Skarn Zn-Pb
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Scheelite
Ore: Pyrrhotite
Ore: Galena
Ore: Chalcopyrite
Gangue: Epidote
Gangue: Diopside
Comments
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = Polymetallic lead-zinc skarn (Cox and Singer, 1986; model 18c).
Comment (Geology): Geologic Description = The Little Bird occurrence consists of sulfide-bearing, pyroxene skarn in limestone of the Lower Devonian Barren Ridge Limestone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). The skarns occur near a weakly mineralized granite porphyry stock (Brewer and others, 1992). Discontinuous semi-massive sulfide to disseminated pyrrhotite, chalcopyrite, sphalerite, and galena occur in a 200 meter by 700 meter skarn zone. Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten are found in the sulfide-bearing skarn zone (Brewer and others, 1992). The deposit was explored by Anaconda Minerals Company from 1981-1983. No analytical data is available.
Comment (Reference): Primary Reference = Brewer and others 1992
Comment (Workings): Workings / Exploration = The Little Bird occurrence was explored by Anaconda Minerals Company from 1981-1983 (Rob Kell, written communication, 1984). Grades and widths are quite variable, but up to 4.5 percent copper, 1.7 percent lead, 11.4 percent zinc, 426.1 grams/tonne silver, and 0.33 percent tungsten occur in the sulfide bearing skarns (Brewer and others, 1992).
References
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): 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., 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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