Unnamed (Don Miller Hills area)

The Unnamed (Don Miller Hills area) is a zinc 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: Unnamed (Don Miller Hills area)

Commodity

Primary: Zinc
Secondary: Barium-Barite
Secondary: Silver
Secondary: Iron
Secondary: Lead
Secondary: Copper
Secondary: Molybdenum

Location

State: Alaska
District: Copper River

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: Sedimentary exhalative Zn-Pb

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Barite

Comments

Comment (Exploration): Status = Inactive

Comment (Geology): Age = the occurrences are considered to be Eocene to Miocene based on the age of the host rocks.

Comment (Reference): Primary Reference = Goldfarb and others, 1992

Comment (Deposit): Other Comments = This and other geologically similar areas in the Cordova quadrangle warrant further investigation (Nelson and others, 1994). Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Comment (Workings): Workings / Exploration = None, however, investigations of similar geochemical anomalies to the south on Kayak Island (Pickthorn and others, 1985) failed to find any outcrops containing minerals that could be the source of the anomalous metal values in the geochemical samples (Goldfarb and others, 1992). Heavy mineral concentrates contain abundant barite, pyrite, and sphalerite. Analyses of concentrates yielded values of up to 5000 ppm Ba, >2% Zn, and 10%-30% Fe. Anomalous values of Ag, Cu, Mo, and Pb were also detected (Goldfarb and others, 1992).

Comment (Deposit): Model Name = Possibly sedimentary-exhalative Pb-Zn (Cox and Singer, 1986; model 31a)

Comment (Geology): Geologic Description = These occurrences consist of anomalous metal values in geochemical samples from drainages in the area. The metals are thought to come from organic-rich shales in continental clastic rocks of Eocene to Miocene age (Goldfarb and others, 1992), intercalated with marine mafic volcanic rocks in the Poule Creek Formation (Winkler and Plafker, 1991). Heavy mineral concentrates contain abundant barite, pyrite, and sphalerite. Analyses of concentrates yielded values of up to 5000 ppm Ba, >2% Zn, and 10%-30% Fe. Anomalous values of Ag, Cu, Mo, and Pb were also detected (Goldfarb and others, 1992).

References

Reference (Deposit): Nelson, S.W., Miller, M.L., Goldfarb, R.J., Snee, L.W., Sherman, G.E., Roe, C.H., and Balen, M.D., 1994, Mineral resource assessment of the Chugach National Forest Special Study area in northern Prince William Sound, Alaska: U.S. Geological Survey Open-File Report 94-272, 18 p.

Reference (Deposit): Winkler, G.R., and Plafker, George, (1991) 1993, Geologic map of the Cordova and Middleton Island quadrangles, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1984, 1 sheet, scale 1:250,000.

Reference (Deposit): Goldfarb, R.J., Case, J.E., Plafker, George, and Winkler, G.R., 1992, Maps showing areas of potential for mineral resources in the Cordova and Middleton Island 1 degree x 3 degree quadrangles, southern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2190, scale 1:250,000.

Reference (Deposit): Pickthorn, W.J., Goldfarb, R.J., O'Leary, R.M., Sutley, S.J., and Weaver, S.C., 1985, Kayak Island-Analysis of a geochemical anomaly, in Bartsch-Winkler, Susan, and Reed, K.M., eds., The U.S. Geological Survey in Alaska-Accomplishments during 1983: U.S. Geological Survey Circular 945, p. 82-83.

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