Cordova Copper Co.

The Cordova Copper Co. is a copper mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Cordova Copper Co.
Secondary: Fleming Spit

Commodity

Primary: Copper
Secondary: Gold

Location

State: Alaska
District: Copper River

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Massive sulfide, Cyprus

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Surface alteration & extensive oxidation at depth (Grant, 1910).

Rocks

Name: Metavolcanic Rock
Role: Host
Age Type: Host Rock Unit
Age Young: Eocene

Analytical Data

Not available

Materials

Ore: Copper
Ore: Gold
Ore: Cuprite
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite
Ore: Malachite
Gangue: Quartz
Gangue: Epidote
Gangue: Chlorite
Gangue: Calcite

Comments

Comment (Reserve-Resource): Reserves = Inferred reserves of 17,600 tons @ 0.64% Cu are reported by Jansons and others (1984).

Comment (Workings): Workings / Exploration = 12 adits examined in 1980 (Jansons and other, 1984). The main activity took place in 1905-1909 and 1917 (Cobb, 1979: OF 79-973).

Comment (Reference): Primary Reference = Jansons and others, 1984

Comment (Deposit): Model Name = Cyprus massive sulfide (Cox and Singer, 1986; model 24a). See also Crowe and others (1992).

Comment (Deposit): Other Comments = No production, although a sample of native copper from this site was displayed in 1909 at the Alaska-Yukon Exposition (Grant, 1910).? Prospect site could not be located in 1986 during industry exploration (B. Ellis, personal commun., 2000). Site is on State of Alaska land.

Comment (Geology): Geologic Description = This prospect consists of base-and precious-metal deposits in Tertary Orca Group volcanic and sedimentary rocks (Nelson and others, 1985). The volcanic rocks in the prospect area are reported to be amygdaloidal basalts (Grant, 1910). The deposits comprise impregnations and replacements of sulfides, oxides, and native metals in country rock, scattered veins of quartz or sulfides, and irregular masses of sulfide.

Comment (Exploration): Status = Inactive

Comment (Commodity): Ore Material = Copper (native)

Comment (Geology): Age = Tertiary based on the age of the host rocks (Nelson and others, 1985).

References

Reference (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.

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Cordova quadragle, Alaska: U.S. Geological Survey Open-file Report OF 79-973, 73 p.

Reference (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.

Reference (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.

Reference (Deposit): Grant, U.S., 1910, Mining and prospecting on Prince William Sound in 1909: U.S. Geological Survey Bulletin 442, p. 164-165.

Reference (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.

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