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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Nikolai

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 10001035
MRDS ID A011712
Record type Site
Current site name Nikolai
Related records 10234239

Geographic coordinates

Geographic coordinates: -142.67859, 61.46356 (WGS84)
Relative position Near head of Nikolai Creek, a tributary of McCarthy Creek. Best location: MacKevett, 1974. Accurate within radius of 100 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-5(quadrangle 1:63,360 scale)

McCarthy SW(quadrangle 1:100,000 scale)

McCarthy C(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
Copper Primary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Calcite Gangue
Epidote Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Nikolai Greenstone
    Rock description Nikolai Greenstone
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Chitistone Limestone
    Rock description Chitistone Limestone

Nearby scientific data

(1) -142.67859, 61.46356
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Two Cu-bearing veins, each less than 1 m thick, in shear zones in Triassic Nikolai Greenstone about 150 ft below base of Chitistone Limestone and just north of major fault. Veins mainly bornite and chalcopyrite, and minor pyrite, pyrrhotite and secondary Cu and Fe minerals in a quartz-calcite-epidote gangue.
  • Age = Cretaceous

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 = Deposit known to natives in late 1800's. Developed in 1899 by open cuts and more than 100 m underground workings but little work since. Mostly inaccessible by 1943. Surface and underground workings.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Miller, 1946

General comments

Subject category Comment text
Deposit Model Name = Vein, replacement, shear zone

Reporter information

Type Date Name Affiliation Comment
Reporter 07-MAR-94 Leonard, K.R. U.S. Geological Survey
Reporter 07-MAR-94 Elliott, R.L. U.S. Geological Survey
Reporter 07-MAR-94 Nokleberg, W.J. U.S. Geological Survey
Reporter 07-MAR-94 Richter, D.H. U.S. Geological Survey

Beyond USGS

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

External references

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.