Centennial Phosphate Mine

Past Producer in Beaverhead county in Montana, United States with commodities Phosphorus-Phosphates, Uranium, Fluorine-Fluorite, Chromium, Nickel, Vanadium, REE
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10101671
MRDS ID D007126
Record type Site
Current site name Centennial Phosphate Mine
Alternate or previous names Centennial Mountain District
Related records 10123855

Geographic coordinates

Geographic coordinates: -111.68917, 44.56658 (WGS84)
Elevation 2560

Site location context

Political divisions (FIPS codes)

Beaverhead(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Upper Red Rock Lake(quadrangle 1:24,000 scale)

Hebgen Lake(quadrangle 1:100,000 scale)

Ashton(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Red Rock(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management MT)

Bureau of Land Management MT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Montana Beaverhead

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 015S;014S 001W;001W 02 Montana

Comments on the location information

  • THE DISTRICT ENCOMPASSES ALL OF T15S, R1W AND THE S PART OF T14S, R1W

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Uranium Primary
Fluorine-Fluorite Critical Primary
Chromium Critical Secondary
Nickel Critical Secondary
Vanadium Critical Secondary
REE Critical Tertiary

Materials information

Materials Type of material
Shale Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Phosphoria Formation: Meade Peak Member, Retort Member
    Rock description Phosphoria Formation: Meade Peak Member, Retort Member
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) -111.68917, 44.56658

Economic information

Geologic structures

Type of structure Regional
Structure description The Centennial Mtns. Are A Long South-Tilted Fault Block
Type of structure Local
Structure description Strata Strike Wnw And Dip 10-15s

Controls for ore emplacement

  • Shallow-Water Marine Sediments

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Significant No

Mining district

District name Centennial Mountains

Comments on the production information

  • IN THE CENTENNIAL MTN. DISTRICT THERE ARE 150, 250, 400 MILLION TONS, RESPECTIVELY, OF ACID GRADE, FURNACE GRADE, AND LOW GRADE PHOSPHATE ROCK IN THE MEADE MEMBER, BUT ONLY 250 MILLION TONS OF LOW GRADE PHOSPHATE ROCK IN THE RETORT MEMBER

Comments on the workings information

  • SURFACE STRIP MINING IS USED WHERE CONDITIONS ALLOW, UNDERGROUND MINING IS INCREASING

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE MEADE PEAK MEMBER IS AS MUCH AS 18 FT THICK, THE RETORT MEMBER IS ABOUT 30 FT THICK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1980 Doyle, Brien (Wells, John) U.S. Geological Survey

Beyond USGS

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