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Dickey Copper Co.

Past Producer in Alaska, United States with commodities Gold, Copper, Silver, Cobalt, Lead, Zinc
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Geologic information

Identification information

Deposit ID 10000360
MRDS ID A010426
Record type Site
Current site name Dickey Copper Co.
Alternate or previous names Mason & Gleason Co.
Related records 10112671

Geographic coordinates

Geographic coordinates: -146.41253, 60.76959 (WGS84)
Relative position This mine is at an elevation of about 500 feet about 1.3 miles east of Irish Cove, and 0.5 mile southeast of peak 1430. It is in the S1/2 sec. 2, T. 13 S., R. 7 W., of the Copper River Meridian. The location is accurate within 2000 ft. The mine is about 0.25 mile east of its position shown as site C-65 in Jansons and others (1984) (B. Ellis, personal commun., 2000).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Primary
Silver Secondary
Cobalt Secondary
Lead Secondary
Zinc Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 91
USGS model code 24b
Deposit model name Massive sulfide, Besshi (Japanese deposits)
Mark3 model number 30

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Orca Group;Orca Group;Orca Group
    Rock description Orca Group;Orca Group;Orca Group

Nearby scientific data

(1) -146.41253, 60.76959
ListMap

Comments on the geologic information

  • Geologic Description = This deposit consists of sulfide-bearing quartz-calcite veins in 6- to 8-foot-wide shear zones in slate and graywacke of the Tertiary Orca Group (Nelson and others, 1985). The sulfide minerals include chalcopyrite, pyrite, pyrrhotite, and sphalerite.? the mine was active in the period 1910-1913, but most of the production was in 1917 (Moffit and Fellows, 1950). Two principal adits at 470 ft. and 540 ft. were connected by raises. There reportedly were additional crosscuts and drifts (Moffit and Fellows, 1950). Jansons and others (1984) report four adits having the following lengths: 500 ft., 125 ft., 35 ft. (caved), and 10 ft. There was some industry reevaluation in 1986 (B. Ellis, personal commun., 2000).? Jansons and others (1984) report the following analyses: Five grab samples from the 500 ft. adit contained 0.01% to 1.23% Cu, 0.02% to 1.5% Zn, <0.03 ppm to 12.5 ppm Au, <0.01 ppm to 28 ppm Ag, and 0.01 to 0.13% Pb. A selected grab sample contained 15.5 ppm Au. Five grab samples from the 125-ft.-long adit contained 0.3% to 4.3% Cu, 1.43% to 14% Zn, <0.03 ppm to 5.25 ppm Au, 25 to 26 ppm Ag, 80 ppm to 0.13% Pb, and 14 ppm to 740 ppm Co. A grab sample from the crosscut contained 1.6% Cu, 3.1% Zn, 2.8 ppm Au and 10 ppm Ag. A 262-pound bulk sample from the ore bunkers contained 8.65% Cu, 9.6% Zn, 0.072 oz. Au/ton, 0.62 oz. Ag/ton, and 0.04% Co.
  • Age = Probably Tertiary based on the age of the host rocks (Crowe and others, 1992).

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the production information

  • Production Notes = 29,346 pounds of copper was produced, mainly in 1917.

Comments on the reserve resource information

  • Reserves = Moffit and Fellows (1950) report that geophysical prospecting suggests that the mines in this area (CV028 and CV029) contain additional undiscovered mineral resources.

Comments on the workings information

  • Workings / Exploration = The mine was active in the period 1910-1913, but most of the production was in 1917 (Moffit and Fellows, 1950). Two principal adits at 470 ft. and 540 ft. were connected by raises. There reportedly were additional cross cuts and drifts (Moffit and Fellows, 1950). Jansons and others (1984) report four adits having the following lengths: 500 ft., 125 ft., 35 ft. (caved), and 10 ft. There was some industry reevaluation in 1986 (B. Ellis, personal commun., 2000).? Jansons and others (1984) report the following analyses: Five grab samples from the 500 ft. adit contained 0.01% to 1.23% Cu, 0.02% to 1.5% Zn, <0.03 ppm to 12.5 ppm Au, <0.01 ppm to 28 ppm Ag, and 0.01 to 0.13% Pb. A selected grab sample contained 15.5 ppm Au. Five grab samples from the 125-ft.-long adit contained 0.3% to 4.3% Cu, 1.43% to 14% Zn, <0.03 ppm to 5.25 ppm Au, 25 to 26 ppm Ag, 80 ppm to 0.13% Pb, and 14 ppm to 740 ppm Co. A grab sample from the crosscut contained 1.6% Cu, 3.1% Zn, 2.8 ppm Au and 10 ppm Ag. A 262-pound bulk sample from the ore bunkers contained 8.65% Cu, 9.6% Zn, 0.072 oz. Au/ton, 0.62 oz. Ag/ton, and 0.04% Co.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010426
USGS Alaska Resource Data File ARDF CV029

Bibliographic references

  • Deposit

    Moffit, F.H. , and Fellows, R.E. , 1950, Coper deposits of the Prince William Sound district, Alaska; Geological Survey Bullentin 963-B, p. 47-80.

  • 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 = Besshi massive sulfide (Cox and Singer, 1986: model 24b)
Deposit Other Comments = 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-00 S.W. Nelson U.S. Geological Survey