Unnamed (Don Miller Hills area)

Occurrence in Alaska, United States with commodities Zinc, Silver, Barium-Barite, Copper, Iron, Molybdenum, Lead

Geologic information

Identification information

Deposit ID 10307397
Record type Site
Current site name Unnamed (Don Miller Hills area)

Geographic coordinates

Geographic coordinates: -144.33243, 60.23962 (WGS84)
Relative position This site represents several occurrences in an approximately 30 square mile area in the Don Miller Hills. The roughly arcuate area is bounded on the east by the Bering River, on the west by the Katalla River, on the north by Bering Lake, and on the south by Redwood and Burls Creeks. The map site is about at the center of this area, on Peak 2067 in the pass between Rope Creek and Split Creek drainages. It is in the N1/2 sec. 10, T 19 S, R 6 E, of the Copper River Meridian.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Primary
Silver Secondary
Barium-Barite Secondary
Copper Secondary
Iron Secondary
Molybdenum Secondary
Lead Secondary

Materials information

Materials Type of material
Barite Ore
Pyrite Ore
Sphalerite Ore

Mineral occurrence model information

Model code 208
USGS model code 31a
BC deposit profile E14
Deposit model name Sedimentary exhalative Zn-Pb
Mark3 model number 13

Nearby scientific data

(1) -144.33243, 60.23962

Comments on the geologic information

  • 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).
  • Age = the occurrences are considered to be Eocene to Miocene based on the age of the host rocks.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the workings information

  • 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).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF CV070

Bibliographic references

  • 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.

  • 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.

  • 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.

  • 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.

Comments on the references

  • Primary Reference = Goldfarb and others, 1992

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-00 S.W. Nelson U.S. Geological Survey