Copper Mountain

Prospect in Alaska, United States with commodities Copper, Zinc, Silver, Cobalt

Geologic information

Identification information

Deposit ID 10308559
Record type Site
Current site name Copper Mountain

Geographic coordinates

Geographic coordinates: -146.59854, 60.89659 (WGS84)
Relative position This prospect is at an elevation of about 1500 feet on the west side of Vesuvius Valley, approximately one mile southwest of Millard Lake. It is in S1/2 sec. 23, T. 11 S., R. 8 W., of the Copper River Meridian. The location is accurate to within 1000 ft. This prospect is shown as C-84 in Jansons and others (1984).
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Zinc Primary
Silver Secondary
Cobalt Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Quartz Gangue

Mineral occurrence model information

Model code 90
USGS model code 24a
Deposit model name Massive sulfide, Cyprus
Mark3 model number 11

Nearby scientific data

(1) -146.59854, 60.89659

Comments on the geologic information

  • Geologic Description = The country rocks at this prospect are mafic volcanic rocks and sedimentary rocks of the Tertiary Orca Group (Nelson and others, 1985). The deposit consists of quartz and chalcopyrite in a 6-inch-wide shear zone cutting mafic volcanic rock (Jansons and others, 1984). One 20-foot adit was sampled in the early 1980s (Jansons and others, 1984). A chip sample contained 1.87% Cu, 800 ppm Zn, and 10.9 ppm Ag; one grab sample contained 11.7% Cu, 0.35% Zn, 43.5 ppm Ag, and 770 ppm Co.
  • Age = Probably Tertiary based on the age of the host rocks.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the reserve resource information

  • Reserves = Inferred reserves of 300 tons @ 1.87% Cu (Jansons and others, 1984).

Comments on the workings information

  • Workings / Exploration = One 20-foot adit was sampled in the early 1980s (Jansons and others, 1984). A chip sample contained 1.87% Cu, 800 ppm Zn, and 10.9 ppm Ag; one grab sample contained 11.7% Cu, 0.35% Zn, 43.5 ppm Ag, and 770 ppm Co.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF CV010

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

    Crowe, D.E., Nelson, S.W., Brown, P.E., Shanks III, W.C., and Valley, J.W., 1992, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska: Economic Geology, v. 87, p. 1722-1746.

  • Deposit

    Crowe, D.E., Nelson, S.W., Brown, P.E., Shanks III, W.C., and Valley, J.W., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska-A reply: Economic Geology, v. 88, p. 1285-1288.

  • Deposit

    Sainsbury, C.L., 1993, Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska, A discussion: Economic Geology, v. 88, p. 1284-1285.

  • 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

General comments

Subject category Comment text
Deposit Model Name = Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Deposit Other Comments = Nelson and others (1985) interpret the country rocks as accreted ocean crust. Crowe and others (1992; 1993) and Sainsbury (1993) discuss the genesis of the volcanogenic massive sulfide deposits in this area. Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-2000 S.W. Nelson U.S. Geological Survey