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  3. Mineral Resource Data System (MRDS)

Natvakruak Lake

Occurrence in Alaska, United States with commodity Phosphorus-Phosphates
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10003138
MRDS ID A015671
Record type Site
Current site name Natvakruak Lake

Geographic coordinates

Geographic coordinates: -151.7035, 68.29969 (WGS84)
Relative position Known to within 1 mile.

Site location context

Political divisions (FIPS codes)

North Slope(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandler Lake B-3(quadrangle 1:63,360 scale)

Chandler Lake SE(quadrangle 1:100,000 scale)

Chandler Lake C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chandler-Anaktuvuk Rivers(hydrologic unit)

Colville River(hydrologic accounting unit)

Arctic Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Nunamiut 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
Phosphorus-Phosphates Primary

Materials information

Materials Type of material
Fluorapatite Ore

Mineral occurrence model information

Model code 243
USGS model code 34c
Deposit model name Phosphate, upwelling type

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale > Black Shale
    Rock unit name Alapha Limestone
    Rock description Alapha Ls.;Alapha Ls

Nearby scientific data

(1) -151.7035, 68.29969
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Phosphate occurs in a sequence of black chert, lenticular dark siltstone, dark brittle shale, and oolitic phosphate rock that is probably part of the black chert and shale unit of the Alapha limestone. The deposit occurs on a thrust plate overlying the Siksikpuk formation.
  • Age = Mississippian

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Colville

Comments on the workings information

  • Workings / Exploration = 27.9% P2O5; .020% EU.; Field station 50 AKe279

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Cobb, 1975, USGS OFR 75-628, p. 52

General comments

Subject category Comment text
Deposit Model Name = Bedded phosphorite

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUN-1992 M.T. Powers U.S. Geological Survey
Reporter 30-JUN-1992 Huber, D.F. 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.