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Old Harbor

Prospect in Alaska, United States with commodity Copper
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10002653
MRDS ID A015093
Record type Site
Current site name Old Harbor
Related records 10137032

Geographic coordinates

Geographic coordinates: -153.34242, 57.13939 (WGS84)
Relative position This prospect is located on the northwest side of Sitkalidak Island approximately 5 miles south of Old Harbor (Berg and Cobb, 1967, figure 15, locality 14; Cobb, 1972, MF 460, locality 6; MacKevett and Holloway, 1977, locality 6).

Site location context

Political divisions (FIPS codes)

Kodiak Island(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kodiak A-5(quadrangle 1:63,360 scale)

Kodiak SW(quadrangle 1:100,000 scale)

Kodiak(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Kodiak-Afognak Islands(hydrologic unit)

Kodiak-Shelikof(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Old Harbor Native Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone

Nearby scientific data

(1) Kaf
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = A sulfide-bearing shear zone is present along a footwall contact between a gabbro sill and Cretaceous metasedimentary rock. The shear zone is 10 to 20 feet in width and extends for approximately 2500 feet. Pyrite, pyrrhotite, and sparse chalcopyrite are disseminated in the shear zone. In addition, several sulfide masses containing abundant chalcopyrite occur about 1250 feet apart. Assays range from 0.9 percent copper in the disseminated mineralization to 5.52 percent in the chalcopyrite-rich zones (Berg and Cobb, 1967, p. 87).
  • Age = Cretaceous or younger

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Kodiak

Comments on the workings information

  • Workings / Exploration = Assays range from 0.09 percent copper in disseminated material to 5.52 percent copper in one chalcopyrite-rich mass. The shear zone was prospected by 3 short adits prior to WW II.

Reference information

Bibliographic references

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Afognak, Karluk, Kodiak, and Trinity Islands quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-860, 49 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Kodiak quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-460, 1 map sheet, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Berg and Cobb, 1967

General comments

Subject category Comment text
Deposit Model Name = Shear zone with minor copper values.
Deposit Other Comments = Site is on land conveyed to the Koniag Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 12-OCT-1998 S.H. Pilcher U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.