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O'Hara

Prospect in Alaska, United States with commodities Silver, Lead, Zinc, Cadmium
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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 10001483
MRDS ID A011701
Record type Site
Current site name O'Hara
Related records 10161436

Geographic coordinates

Geographic coordinates: -143.84556, 61.33576 (WGS84)
Relative position Northwest flank of Nelson Mountain, 4,000 ft from summit. Best location: MacKevett, 1976, loc. 59. Accurate within radius of 1,000 feet.

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McCarthy B-8(quadrangle 1:63,360 scale)

McCarthy SW(quadrangle 1:100,000 scale)

McCarthy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chitina River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Cadmium Secondary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) PIPsm
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Veins of galena, sphalerite, pyrite, marcasite, and pyrrhotite, up to 20 cm thick, in Permian marble containing disseminated tourmaline, pyrite, pyrrhotite and sphalerite.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Nizina

Comments on the workings information

  • Workings / Exploration = Explored by two short adits driven about 1940.

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

    MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.

Comments on the references

  • Primary Reference = Berg and Cobb, 1967

General comments

Subject category Comment text
Deposit Model Name = Lode: vein, disseminated.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-NOV-1997 Leonard, K.R. U.S. Geological Survey
Reporter 10-NOV-1997 Elliott, R.L. U.S. Geological Survey
Reporter 10-NOV-1997 Richter, D.H. 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.