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Bonne Terre Mine

Past Producer in St. Francois county in Missouri, United States with commodities Cobalt, Copper, Lead, Nickel, Zinc
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Reporter information

Geologic information

Identification information

Deposit ID 10172172
MAS/MILS ID 0291870004
Record type Site
Current site name Bonne Terre Mine

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -90.54841, 37.92196 (WGS84)
Elevation 248
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

St. Francois(county)

Missouri(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bonne Terre(quadrangle 1:24,000 scale)

Farmington(quadrangle 1:100,000 scale)

Rolla(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Big(hydrologic unit)

Upper Mississippi-Meramec(hydrologic accounting unit)

Upper Mississippi-Kaskaskia-Meramec(hydrologic subregion)

Upper Mississippi(hydrologic region)

Geographic areas

Country State County
United States Missouri St. Francois

Public Land Survey System information

Meridian Township Range Section Fraction State
5th Principal 037 N 004 E 13 SWNWNW Missouri

Commodities

Commodity Importance
Cobalt Critical Tertiary
Copper Secondary
Lead Primary
Nickel Critical Tertiary
Zinc Critical Secondary

Materials information

Materials Type of material
Bravoite Unknown
Calcite Unknown
Chalcopyrite Unknown
Dickite Unknown
Dolomite Unknown
Galena Unknown
Linnaeite Unknown
Marcasite Unknown
Pyrite Unknown
Quartz Unknown
Sphalerite Unknown

Nearby scientific data

Main Entrance (1) -90.54841, 37.92196
ListMap

Economic information

Ore body information

  • Thickness 30M
    Length 4000M
    Width 2000M
    Area 2HA
    Depth to top 60M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 TABULAR
    Type of Orebody #3 BRECCIA FILL
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Secondary Ore Control CONTACT ZONE
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 DOLOMITIZATION
    Type of Wallrock Alter. #2 PYRITIZATION
    Type of Wallrock Alter. #3 SILICIFICATION
    Strike And Dip N45E:
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 10
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 2
    Date of Last Modification 800623

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1864
Mining method Open Stope - Room and Pillar
Year of first production 1868
Milling method Flotation

Mining district

District name Southeast Mo

Mineral rights holdings

Type of mineral rights Fee Ownership
Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner St. Joe Minerals Corp.
    Interest 100
    Home office New York
    Year 1975

Comments on the production information

  • CAPACITY AND OUTPUT VALUES ARE UNBLENDED, I.E., THE VALUES APPLY ONLY TO BONNE TERRE. PRODUCT OUTPUTS ARE BASED UPON SPECIFIC, OR NON-BLENDED, MILL FEEDS. ASSAY VALUES FOR THE CONCENTRATE GRADES ARE BASED UPON BLENDED FEED GRADES AND RECOVERIES, COMBINED MILL FEED TONNAGES, AND THEIR COMBINED TOTAL MILL OUTPUTS.

Comments on the reserve resource information

  • THE BONNE TERRE RESERVES CONSIST OF PILLARS WHICH CAN BE EXTRACTED. THUS, THE MINING EXTRACTION RATE IS 100% OF THE RESERVES, AND NO DILUTION OF GRADE WOULD OCCUR.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN STOPE
    Swell Factor .81
    Percent Waste Rock 0
    Percent Recovery 100
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    1st Condition of Workings FLOODED
    Capacity 73
    Capacity Units MT ORE/DAY
    Unit Production Cost 14.82
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 1
    Year of Information 1977
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 2
    Mining Record # 2
    Status of Mining Method PROPOSED
    Mining Method OPEN STOPE
    Swell Factor .81
    Percent Waste Rock 0
    Percent Recovery 100
    Hardness of Rock SOFT NONPLASTIC FISSURED MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Capacity 73
    Capacity Units MT ORE/DAY
    Unit Production Cost 14.82
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 1
    Year of Information 1977

Comments on other economic factors

  • MINE COSTS ARE ESTIMATED BY SIZE-SCALING FROM ESTIMATED CAPITAL AND OPERATING COSTS FOR THE BRUSHY CREEK MINE, AND BY DIRECT ESTIMATION OF THE COST OF PREPRODUCTION DEWATERING OF THE UNDERGROUND WORKINGS AND THE COST OF MINE DRAINAGE DURING OPERATIONS. DUE TO THE RELATIVELY LOW MINE CAPACITY,NO ONSITE MILLING OR CONCENTRATING IS PLANNED FOR BONNE TERRE ORE. THIS ORE IS ASSUMED TO BE CUSTOM-MILLED AT THE HIGDON MILL. THE CUSTOM MILL CHARGE IS CALCULATED AS THE INCOME PER TONNE OF HIGDON ORE REQUIRED TO GIVE A 20-PERCENT BEFORE-TAX RATE-OF-RETURN OF THE INITIAL $7,798,600 MILL INVESTMENT PLUS THE MILL OPERATING COST. RECOVERY OF WORKING CAPITAL AT THE END OF THE 13.51-YR MILL LIFE IS ASSUMED. THE BONNE TERRE MILL CUSTOM CHARGE IS THUS CALCULATED TO BE $16.64 PER TONNE ($8.91 FOR RETURN ON CAPITAL AND $7.73 FOR OPERATING COST). THE HIGDON MILL OPERATING COST (PER TONNE OF HIGDON ORE), DURING THE 10 YEARS IN WHICH THE BONNE TERRE ORE IS CUSTOM-MILLED, IS LOWERED BY THE AMOUNT OF THE CUSTOM MILLING REVENUES, AS SHOWN BELOW: HIGDON MILL OP COST =(TOTAL ANNUAL MILL OP COST MINUS ANNUAL CUSTOM MILLING REVENUES) / HIGDON ANNUAL TONNAGE = [((726 + 73) X 250 X $7.73) - (73 X 250 X $16.64)]/ (726 X 250) = $6.83 PER TONNE. THE INITIAL CAPITAL COST OF THE MILL IS NOT SHARED BETWEEN THE BONNE TERRE AND HIGDON MINES BUT IS INSTEAD BORNE EN- TIRELY BY THE HIGDON MINE BECAUSE 1) THE BONNE IS A MUCH SMALLER AND (SUB)MARGINAL OPERATION WHICH WOULD BE BROUGHT INTO PRODUCTION ONLY INCIDENTALLY TO THE EXISTENCE OF THE HIGDON MILL AND 2) THE TWO MINES ARE OWNED BY DIFFERENT COMPANIES. IN THIS EVALUATION IT WAS DECIDED THAT THE MOST PROBABLE AND REALISTIC METHOD FOR HANDLING THE MILL CAPITAL COST WOULD BE TO HAVE THE HIGDON MINE PAY THE INITIAL CAPITAL COST AND TO HAVE THE BONNE TERRE MINE PAY (IN EFFECT) FOR ITS SHARE OF THE CAPITAL COST THROUGH CUSTOM MILL CHARGES (SEE COMMENTS I013-20). THESE SAME CUSTOM CHARGES ARE REVENUES FROM THE POINT OF VIEW OF THE HIGDON MINE AND ARE THEREFORE SUBTRACTED FROM THE HIGDON MILL OPERATING COSTS. THE PROPOSED COSTS FOR THE HIGDON MILL, COBALT-NICKEL RECOVERY CIRCUITRY ARE ESTIMATED FROM RESEARCH DATA OBTAINED BY THE BUREAU OF MINES DURING OPERATION OF A PROCESS DEMONSTRATION UNIT AT THE MAGMONT MILL (MAS PROPERTY SEQUENCE NO. 0290930008).

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 31-OCT-1997 T.D &D.W. U.S. Bureau of Mines

Beyond USGS

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

External references

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