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Chisna Consolidated (Buckeye Group)

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

Identification information

Deposit ID 10000366
MRDS ID A010432
Record type Site
Current site name Chisna Consolidated (Buckeye Group)
Related records 10136800

Geographic coordinates

Geographic coordinates: -146.53143, 60.84765 (WGS84)
Relative position This mine is on the south shore of inner Landlocked Bay, just east of the mouth of China Creek. It is in the NE1/4 sec. 7, T. 12 S., R. 7 W., of the Copper River Meridian. The location of the site is accurate to within 1000 ft. This mine is shown as site C-69 in Jansons and others (1984) and as #16 in Cobb (1972: MF-392).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock
    Rock unit name Orca Group
    Rock description Orca Group
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -146.53143, 60.84765
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Comments on the geologic information

  • Geologic Description = The deposit is in mafic volcanic rocks of the Tertiary Orca Group (Nelson and others, 1985). It consists of thin films of chalcopyrite and pyrite along fractures within shear zones in the hanging wall of the Landlocked Bay fault (Mihelich and Wells, 1957).? Samples contained 0.64% Cu and trace amounts of Au and Ag (Mihelich and Wells, 1957). Chip samples collected by Jansons and others (1984) contained 0.2% to 0.38% Cu.
  • Age = Probably Tertiary based on the age of the host rocks.

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 = Some ore shipped (Mihelich and Wells, 1957).

Comments on the reserve resource information

  • Reserves = Inferred reserves of 1,200 tons @ 0.26% Cu and 1,200 tons @ 0.3% Cu (Mihelich and Wells, 1957).

Comments on the workings information

  • Workings / Exploration = Two exploratory shafts sunk into shear zone. Samples contained 0.64% Cu and trace amounts of Au and Ag (Mihelich and Wells, 1957). Chip samples collected by Jansons and others (1984) contained 0.2% to 0.38% Cu.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010432
USGS Alaska Resource Data File ARDF CV022

Bibliographic references

  • Deposit

    Mihelich, M., and Wells, R.R., 1957, Copper mines and prospects adjacent to Landlocked Bay, Prince William Sound, Alaska: U.S. Bureau of Mines Report of Investigations RI 5320, 21 p.

  • 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

    Cobb, E.H., 1972, Metallic mineral resources map of the Cordova quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-392, 1 sheet, 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 = Mihelich and Wells, 1957

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-00 S.W. Nelson U.S. Geological Survey