Big Hole Syncline

Past Producer in Silver Bow county in Montana, United States with commodities Chromium, Fluorine-Fluorite, Nickel, Phosphorus-Phosphates, REE, Uranium, Vanadium
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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mineral rights holdings
  11. Land status
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10221424
MAS/MILS ID 0300930310
Record type Site
Current site name Big Hole Syncline

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -112.72669, 45.6866 (WGS84)
Elevation 1707
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Silver Bow(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Melrose(quadrangle 1:24,000 scale)

Butte South(quadrangle 1:100,000 scale)

Dillon(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Big Hole(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 Silver Bow

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 002 S 009 W 04 Montana

Commodities

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

Nearby scientific data

Ore Body (1) -112.72669, 45.6866

Economic information

Ore body information

  • Thickness 2.7M
    Depth to top 5M
    Field Value
    MAS Matrix # 1
    MAS Column # 3
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Thickness 4.8M
    Depth to top 5M
    Field Value
    MAS Matrix # 2
    MAS Column # 3
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. NONE
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Both
Significant No

Mineral rights holdings

Type of mineral rights Federal Lease

Land status

Ownership category BLM Administrative Area

Reserves and resources

  • Type In-situ
    Estimate year 1970
    Inferred 27215000mt ore
    Total resources 31751000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 25 wt-pct Phosphorus Major 1970
    Fluorine-Fluorite F 2.5 wt-pct Fluorine Trace 1970
    Uranium U 0.0029 wt-pct Uranium Trace 1970
  • Type In-situ
    Estimate year 1970
    Inferred 40823000mt ore
    Total resources 47627000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P2O5 18.6999 wt-pct Phosphorus Major 1970
    Fluorine-Fluorite F 1.8699 wt-pct Fluorine Trace 1970
    Uranium U 0.0029 wt-pct Uranium Trace 1970

Comments on the reserve resource information

  • M1 C3 RETORT MEMBER: Q50; RESOURCE BLOCK ABOVE ENTRY LEVEL, BED AREA 4301270 SQUARE METERS; Q25; RESOURCE BLOCK ABOVE} FIRST 30M BELOW ENTRY LEVEL, BED AREA 4970150 SQUARE METERS; Q10; RESOURCE BLOCK, TOTAL IN AREA, BED AREA 33444000 SQUARE METERS

Reference information

Bibliographic references

  • Reserve-Resource

    SWANSON, ROGER, 1970, MINERAL RESOURCES IN PERMIAN ROCKS OF

  • Reserve-Resource

    SOUTHWEST MONTANA, USGS PROFL PAPER 313-E, P. 661-777

General comments

Subject category Comment text
Deposit THIS RECORD IS FOR A LARGE AREA COVERING THE PHOSPHATE }MINERALIZATION OF THE BIG HOLE SYNCLINE. THUS IT INCLUDES SECS. 4,5,6,8,9,10,14,23,26,36 IN T2S R9W; SECS 30,31,32 T1S R9W DEPOSITS SEQ NO. 0300930095 AND 0300010061 ARE LOCATED HERE DEPOSIT SEQ NO. 0300010548 IS LOCATED HERE. THE SYNCLINE STRIKES N 30-35 W AND IS ASYMMETRIC. OVERTURNED SW LIMB DIPS ARE AS LOW AS 35 DEG, IN NE LIMB DIPS ARE 45 DE APATITE OCCURES AS OOLITIC TO PELLETAL GRAINS THAT ARE VERY FINE TO MEDIUM SAND SIZE, BUT NODULES ARE LOCALLY COMMON

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-84 Benjamin U.S. Bureau of Mines

Beyond USGS

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