Unnamed (head of Dead Creek)

Occurrence in Alaska, United States with commodities Copper, Zinc

Geologic information

Identification information

Deposit ID 10307369
Record type Site
Current site name Unnamed (head of Dead Creek)

Geographic coordinates

Geographic coordinates: -145.87252, 60.9096 (WGS84)
Relative position This occurrence is at an elevation of about 2400 feet at the northeastern head of Dead Creek, near the toe of an unnamed glacier. It is in the W1/2 sec. 13, T. 11 S., R. 4 W., of the Copper River Meridian. The accuracy of the location is within 2000 ft. This occurrence is shown as site C-57 in Jansons and other (1984).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Zinc Primary

Materials information

Materials Type of material
Malachite Ore
Pyrite Ore
Sphalerite Ore

Alteration

  • (Local) Minor oxidation of copper minerals.

Nearby scientific data

(1) -145.87252, 60.9096

Comments on the geologic information

  • Geologic Description = The country rocks at this occurrence are slate and graywacke of the Upper Cretaceous Valdez Group (Nelson and others, 1985). Jansons and others (1984) describe a 4-foot-wide shear zone in the slate and graywacke that contins a foot-wide zone of pyrite, spalerite, and malachite. One chip sample contained 41 ppm Zn, and 7 ppm Cu, and a grab sample contained 1.23% Zn and 0.17% Cu.

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 = Site examined as part of a U.S. Bureau of Mines and U.S.G.S. mineral evaluation of the Chugach National Forest. One chip sample contained 41 ppm Zn, and 7 ppm Cu, and a grab sample contained 1.23% Zn and 0.17% Cu (Jansons and others, 1984).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF CV036

Bibliographic references

  • Deposit

    Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

  • Deposit

    Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, scale 1:250,000.

  • Deposit

    Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Jansons and others, 1984

Reporter information

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