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Glenover Mine

Past Producer in South Africa with commodities Phosphorus-Phosphates, Vermiculite
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Production statistics
  18. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10079227
MRDS ID W028278
Record type Site
Current site name Glenover Mine

Geographic coordinates

Geographic coordinates: 27.13476, -23.86339 (WGS84)
Elevation 1006
Relative position 80 KILOMETERS NORTH OF THE TOWN OF THABAZIMBI

Site location context

Political divisions (FIPS codes)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country
South Africa

Commodities

Commodity Importance
Phosphorus-Phosphates Primary
Vermiculite Tertiary

Comments on the commodity information

  • PHOSPHATE, ONLY, IS BEING MINED AT THIS OPERATION AT THE PRESENT TIME, BUT LONGER RANGE PLANS CALL FOR VERMICULITE MINING AND SALES AS ECONOMICALLY RECOVERABLE RESERVES OF PHOSPHATE DECLINE.

Materials information

Materials Type of material
Hematite Gangue
Ilmenite Gangue
Perovskite Gangue
Pyrochlore Gangue
Rutile Gangue
Limonite Unknown
Martite Unknown

Alteration

  • (Local) Partial Alteration Of The Breccias And Pyroxenite Extend To Measured Depth Of 90 Meters Below Surface

Analytical data

Result SEE PRODUCTION ENTRIES

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Carbonatite, Intrusive
    Rock unit name Glenover Carbonatite Complex
    Rock description Glenover Carbonatite Complex
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Carbonatite, Intrusive
    Rock unit name Nylstroom Series, Waterberg System Shales And Sandstones
    Rock description Nylstroom Series, Waterberg System Shales And Sandstones

Nearby scientific data

(1) 27.13476, -23.86339
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description The Complex Is An Igneous Intrusion Into Shales And Sandstones Of The Nylstroom Series, Waterberg System (All Pre-Cambrian In Origin).
Type of structure Local
Structure description "Glenover Carbonatite Complex" (Igneous), An Intrusive Near-Vertical Pipe Composed Largely Of Breccias And Pyroxenite.

Ore body information

  • General form RING STRUCTURE (WITH DISCONTINUOUS RING DIKES)
    Strike NE-SW
    Dip 90 DEG.
    Length 8400M
    Width 4900M

Controls for ore emplacement

  • Transgressive Carbonatite

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Deposit size Medium
Significant No
Discovery year 1953
Discoverer Dr. H. N. Visser
Year of first production 1955

Mining district

District name Glenover Carbonatite Complex; Thabazimbi Area

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Glenover Phosphate Ltd.
  • Type Owner
    Owner Gold Fields Of South Africa Ltd.

Production statistics

  • Year 1977
    Material ORE P
    Accuracy Accurate
    Description Ap_Grade: ^29.7 % P205
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    P2O5 Ore Phosphorus-Phosphates Phosphorus 30wt-pct
  • Year 1979
    Material ORE P
    Accuracy Accurate
    Description Ap_Grade: ^29.6% P2o5
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    P2O5 Ore Phosphorus-Phosphates Phosphorus 30wt-pct
  • Year 1982
    Material OVB
    Accuracy Accurate
    Description Ap_Grade: ^33.1% P205
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    P2O5 Ore Phosphorus-Phosphates Phosphorus 33wt-pct
  • Year 1983
    Period 1972-1983
    Material ORE P
    Description Cp_Grade: ^30.4% P205
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    P2O5 Ore Phosphorus-Phosphates Phosphorus 30wt-pct

Comments on the production information

  • MINING OPERATIONS CEASED DECEMBER 2, 1982. MILLING CEASED MARCH 1983. ; MINING AT GLENOVER CEASED IN DECEMBER 1982, AND MILLING CEASED IN MARCH 1983. AFTER FINAL DELIVERIES, A STOCKPILE OF 17,067 TONS REMAINED FOR SALE. ALL HIGH GRADE ORE HAS BEEN DEPLETED AND MINE ASSETS ARE BEING DISPOSED OF PRIOR TO OBTAINING CLOSURE CERTIFICATE FROM INSPECTOR OF MINES.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Total resources 7000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Phosphorus-Phosphates P 30 wt-pct Phosphorus Major 1981

Comments on the reserve resource information

  • PROVED AND BLOCKED OUT ORE ONLY. COMPANY ESTIMATES ARE THAT THE CURRENT RESERVES SHOULD YIELD APPROXIMATELY 403,000 SALEABLE METRIC TONS AT A GRADE OF 29.6 % P205 FOLLOWING NORMAL BLENDING AND SORTING. ADDITIONALLY, HIGH GRADE ORE IN STOCKPILES TOTALS 73,423 TONS ( 29.9 % P205 ) AND SUB-ECONOMIC ORES TOTAL 772,261 TONS ( 25.4 % P 205 ).

Comments on the workings information

  • OPEN PIT MINING METHODS ONLY. A MECHANIZED OPERATION SUPPLEMENTED BY VISUAL, AND HAND-SORTED, SELECTIVE MINING IN THE PIT AREA. HAND-COBBING FOLLOWS ON SLOW-MOVING CONVEYOR BELTS PRIOR TO CRUSHING.

Comments on development

  • MILL.CAP: 0.25 MIL. MET. T/YR. ; ECON.COM: A MEDIUM-SIZED MINING OPERATION DEPENDENT UPON SELECTIVE MINING OF HIGH GRADE ORES, SELECTIVE SCREENING AND HAND COBBING TO MAINTAIN SHIPPING GRADES WITHIN A RANGE OF 29 - 30 PERCENT P205 . HIGH GRADE PHOSPHATE RESERVES ARE NOW LIMITED.MINE INOPERATIVE SINCE MARCH 1983.

Reference information

Bibliographic references

  • Deposit

    MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 , DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1976

  • Deposit

    GLENOVER PHOSPHATE LIMITED, 1977, ANNUAL REPORTS.

  • Deposit

    GLENOVER PHOSPHATE LIMITED, 1976, ANNUAL REPORTS.

  • Deposit

    GLENOVER PHOSPHATE LIMITED, 1975, ANNUAL REPORTS.

  • Deposit

    GLENOVER PHOSPHATE LIMITED, 1974, ANNUAL REPORTS.

  • Deposit

    GLENOVER PHOSPHATE LIMITED, 1973, ANNUAL REPORTS.

  • Deposit

    GOLDFIELDS OF SOUTH AFRICA, 1968, PHOSPHATES - SOUTH AFRICA: BROCHURE, DECEMBER 1968.

  • Production

    GLENOVER PHOSPHATE COMPANY ANNUAL REPORTS ; GLENOVER ANNUAL REPORT - 1982 ; GLENOVER ANNUAL REPORT-1983 ; GLENOVER PHOSPHATE COMPANY ANNUAL REPORT 1980 ; GLENOVER ANNUAL REPORT - 1981 ; GLENOVER PHOSPHATE COMPANY ANNUAL REPORT 1979 ; GLENOVER PHOSPHATE LIMITED. ANNUAL REPORT 1978

General comments

Subject category Comment text
Deposit MAX. THICKNESS (AS VERTICAL PIPE STRUCTURE) IS NOT KNOWN. STRUCTURE OUTCROPS ON SURFACE. DEPTH TO BOTTOM NOT KNOWN. MAX. LENGTH AND WIDTH REFER TO OVERALL KNOWN SIZE OF DEPOSIT ON THE SURFACE. MINABLE AREAS (FOR PHOSPHATE) ARE LIMITED, HOWEVER, TO SMALL CENTRAL BRECCIATED BODY. LOW GRADE PHOSPHATE ( 2 - 6 PERCENT P205 ) ALSO OCCURS IN THE DEPOSIT'S "MIDDLE BRECCIA ZONE", THE "OUTER BRECCIA ZONE" AND IN A PYROXENITE ZONE SURROUNDING THE OCCURRENCE'S PRINCIPAL CARBONATITE PLUG.
Deposit INFORMATION MERGED FROM RECORD NUMBER W028889 ; W028911 ; W030960 ; W032367 ; W033037 ; W033084

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1978 Sweetwood, Charles W. Department of State
Updater 01-JUL-1986 Mccarter, Lorna D Department of State
Updater 01-MAY-1980 Sweetwood, Charles W. Department of State
Updater 01-JUL-1981 Mccarter, Lorna D. Department of State
Updater 01-AUG-1982 Mccarter, Lorna D. Department of State
Updater 01-JUN-1984 Mccarter, Lorna D. Department of State
Updater 01-JUL-1983 Mccarter, Lorna D. Department of State

Beyond USGS

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

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