Little Bird

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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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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