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M'Dilla

Producer in Tunisia 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. Nearby scientific data
  7. Ore body information
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10231787
MAS/MILS ID 7230300003
Record type Site
Current site name M'Dilla

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 8.76843, 34.29923 (WGS84)
Elevation 300
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Tunisia(country)

Geographic areas

Country
Tunisia

Commodities

Commodity Importance
Phosphorus-Phosphates Primary

Nearby scientific data

Ore Body (1) 8.76843, 34.29923
ListMap

Economic information

Ore body information

  • Strike N90E
    Dip 11N
    Thickness 3M
    Area 7407HA
    Depth to top 200M
    Field Value
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control BEDDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N90E:11N
    Minimum Depth to Top 0
    Total Surface Area (HA) 7407
    Date of Last Modification 830415

Comments on the geologic information

  • PREDOMINATE ORE MINERAL IS FLUORAPATITE
  • ALLUVIAL SANDS AND CLAYS HAVE HIGHLY VARIABLE THICKNESS (0-20M). LIMESTONE CAPROCK HAS HIGHLY VARIABLE THICK- NESS (10-40M).

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1890
Mining method Open Stope - Room and Pillar
Year of first production 1899
Milling method Washing

Mining district

District name Gafsa Basin

Mineral rights holdings

Type of mineral rights Unknown

Land status

Ownership category Unknown

Ownership information

  • Type Owner-Operator
    Owner Compagnie Des Phosphates De Gafsa (Government)
    Interest 100
    Home office Tunisia
    Year 1981

Production statistics

  • Year 1965
    Description 540000 Mt Ore/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Phosphorus-Phosphates Phosphorus 540000mt
  • Year 1966
    Description 610000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 610000mt
  • Year 1967
    Description 600000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 600000mt
  • Year 1968
    Description 840000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 840000mt
  • Year 1969
    Description 870000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 870000mt
  • Year 1970
    Description 880000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 880000mt
  • Year 1971
    Description 900000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 900000mt
  • Year 1972
    Description 1550000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1550000mt
  • Year 1973
    Description 1790000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1790000mt
  • Year 1975
    Description 1450000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1450000mt
  • Year 1976
    Description 1160000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1160000mt
  • Year 1977
    Description 1640000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1640000mt
  • Year 1978
    Description 1790000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1790000mt
  • Year 1979
    Description 1790000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1790000mt
  • Year 1980
    Description 1790000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Phosphorus-Phosphates Phosphorus 1790000mt

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P 19 wt-pct Phosphorus Major 1986

Comments on the reserve resource information

  • TWO PHOSPHATE UNITS IN TOTAL THICKNESS.

Workings at the site

  • Type of workings Underground
    Length 221000M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method ROOM AND PILLAR 10-34
    Percent Waste Rock 50
    Percent Recovery 65
    Hardness of Rock SOFT NONPLASTIC WITH LITTLE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    1st Condition of Workings UNKNOWN
    Capacity 2727
    Capacity Units MT ORE/DAY
    Operating Days per Year 275
    Operating Shifts per Day 2
    Year of Information 1985

Reference information

Bibliographic references

  • Reserve-Resource

    INDUSTRIAL MINERALS. JULY 1986, PP. 20-27.

  • Deposit

    AMERICAN EMBASSY TUNISIA, INDUSTRIAL OUTLOOK REPORT, 6/9/80.

  • Deposit

    BOYCE, R.L., THE TUNISIAN PHOSPHATE INDUSTRY: TRIP REPORT

  • Deposit

    MARCH 21, 1980

  • Deposit

    BRITISH SULPHUR CORP. LTD., WORLD SURVEY OF PHOSPHATE

  • Deposit

    DEPOSITS, FOURTH EDITION, 1980

  • Deposit

    CAPE, J. J., DEPOSIT EVALUATION, 1981.

  • Deposit

    COMPANIE DES PHOSPHATES DE GAFSA, FIVE YEAR PLAN, TABLES FOR

  • Deposit

    YEARS 1978 THROUGH 1984

  • Deposit

    DEVOTO, R.H., AND D.N. STEVENS, URANIFEROUS PHOSPHATE

  • Deposit

    DEPOSITS AND TECHNOLOGY AND ECONOMICS OF URANIUM RECOVERY

  • Deposit

    FROM PHOSPHATE RESOURCES, UNITED STATES AND FREE WORLD,

  • Deposit

    VOL. 1, JUNE 1979

  • Deposit

    INTERNATIONAL GEOLOGICAL CONGRESS, 14TH, LES RESERVES

  • Deposit

    MONDIALES EN PHOSPHATES, 2 VOLUMES, 1926

  • Deposit

    KHAMMOUMA, S., LETTER TO W.F. STOWASSER, JULY 16, 1979

  • Deposit

    SHELDRICK, W.F. AND HARALD STIER, WORLD PHOSPHATE SURVEY

  • Deposit

    BACKGROUND PAPERS, SEPT. 1979. (RESTRICTED CIRCULATION.

  • Deposit

    USE ONLY WITH PERMISSION.)

  • Deposit

    SRI INTERNATIONAL, CHEMICAL ECONOMICS HANDBOOK, PHOSPHATE

  • Deposit

    ROCK, MARCH 1980

  • Deposit

    STOWASSER, W.F., FIELD TRIP REPORT--TUNISIAN PHOSPHATE ROCK

  • Deposit

    MINING INDUSTRY, NOV. 24, 1976

  • Deposit

    STOWASSER, W.F., MEMORANDUM: FIELD TRIP TO PHOSPHATE

  • Deposit

    PRODUCING MINES IN TUNISIA, DEC. 18, 1979.

  • Deposit

    TUNISIA BANKS ON NEW TECHNOLOGY ... P205 PRODUCTION GOALS

  • Deposit

    ENGINEERING AND MINING JOURNAL, SEPT. 1980.

  • Deposit

    TUNISIA ... PLANT TO DOUBLE PHOSPHATE PRODUCTION ...,

  • Deposit

    ENGINEERING AND MINING JOURNAL, MAY 1976.

  • Deposit

    U.S. GEOLOGICAL SURVEY. MRDS MINERAL RESOURCE DATA SYSTEM.

  • Deposit

    U.S. GEOLOGICAL SURVEY. MAS MINERALS AVAILABILITY SYSTEM.

  • Deposit

    SAINFELD, PAUL. THE LEAD-ZINC BEARING DEPOSITS OF TUNISIA.

  • Deposit

    ECONOMIC GEOLOGY. 1956. PP. 150-177.

  • Deposit

    DEFENSE MAPPING AGENCY. OPERATIONAL NAVIGATION CHART

  • Deposit

    1:1,000,000. ONC G-2. EDITION G 1967.

General comments

Subject category Comment text
Deposit CAPACITY REPORTED AT 490,000 MT/YR.

Reporter information

Type Date Name Affiliation Comment
Reporter 02-JUN-97 Fantel, Richard J. U.S. Bureau of Mines

Beyond USGS

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

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