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Hartebeestfontein Gold Mine

Producer in South Africa with commodities Gold, Uranium, Sulfur-Pyrite, PGE, Silver, Sulfur, Sulfuric Acid
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Reserves and resources
  20. Workings at the site
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10078500
MRDS ID W026848
Record type Site
Current site name Hartebeestfontein Gold Mine
Related records 10231492

Geographic coordinates

Geographic coordinates: 26.81814, -26.82992 (WGS84)
Elevation 1370
Relative position 16 KILOMETERS EAST OF THE CITY OF KLERKSDORP

Site location context

Political divisions (FIPS codes)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country
South Africa

Commodities

Commodity Importance
Gold Primary
Uranium Secondary
Sulfur-Pyrite Secondary
PGE Critical Secondary
Silver Secondary
Sulfur, Sulfuric Acid Tertiary

Comments on the commodity information

  • GOLD RECOVERIES DATE FROM 1955 ; URANIUM, 1956 , GOLD CONCENTRATIONS EXIST PREDOMINANTLY IN A THIN SEAM OF CARBON AT THE BASE OF THE VAAL REEF, VARIABLE IN THICKNESS FROM A FRACTION OF A CENTIMETER TO OVER ONE METER. URANIUM OCCURS ABOVE, WITHIN, AND GRADATIONALLY BELOW THE VAAL REEF. SMALL QUANTITIES PT AND AG RECOVERED BUT UNIMPORTANT IN SOUTH AFRICA TERMS. PT IS AN IMPURITY IN GOLD AND IS RECOVERED AT THE RAND REFINERY AS A CONSEQUENCE OF THE PURIFICATION PROCESS.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore

Alteration

  • (Local) None

Analytical data

Result SEE ENTRIES UNDER PRODUCTION AND RESERVES

Mineral occurrence model information

Model code 193
USGS model code 29a
Deposit model name Quartz pebble conglomerate Au-U (BC name is Paleoplacer U-Au-PGE-Sn-Ti

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Ventersdorp System-Lava
    Rock description Ventersdorp System-Lava
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Transvaal System-Campbell Rand Dolomite;Witwatersrand System (Upper Division)-Quartzite, Shales, Grits And Conglomerates
    Rock description Transvaal System-Campbell Rand Dolomite;Witwatersrand System (Upper Division)-Quartzite, Shales, Grits And Conglomerates
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate

Nearby scientific data

(1) 26.81814, -26.82992
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Unique Continuity Of Gold-Bearing Horizons Over Extended Area, Though Well Marked By Folding, Faulting And (Locally) Erosion And Redeposition Of Overlying Conformable Sediments.
Type of structure Local
Structure description Uniformly - Gentle Dip, But With Local Folds And Faults. Overlying Lavas And Dolomites Are Massive.

Ore body information

  • General form TABULAR/BLANKET
    Strike NE - SW
    Dip 10 DEG. SE
    Thickness 1.07M
    Depth to bottom 2400M

Controls for ore emplacement

  • Gentle Uplift Of Continental Mass; Erosion; Peneplanation; Folding; Faulting; Volcanicity; Dike Injection And Build-Up Of Younger Sediments

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Deposit size Large
Significant No
Discovery year 1942
Year of first production 1955

Mining district

District name Klerksdorp Area Of The Witwatersrand Goldfields

Land status

Ownership category Private

Ownership information

  • Type Joint Venture Owner
    Owner Ownership Distribution:
  • Type Joint Venture Partner
    Owner Anglo Transvaal Consolidated Investment Co., Ltd.
    Interest 10.6
  • Type Joint Venture Partner
    Owner Barclays Bank Nominees
    Interest 23.5
  • Type Joint Venture Partner
    Owner Zandpan Gold Mining Co. Ltd.
    Interest 19.6
  • Type Joint Venture Partner
    Owner Anglo American Gold Investment Co., Ltd.
    Interest 15.2
  • Type Joint Venture Partner
    Owner West Rand Investment Trust Ltd.
    Interest 18.9
  • Type Joint Venture Partner
    Owner Miscellaneous
    Interest 12.2
  • Type Operator
    Owner Hartebeestfontein Gold Mining Co. Ltd.

Production statistics

  • Year 1976
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.366 Tr. Oz. Au/Met. Ton Of Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 0g/mt
  • Year 1977
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.128 Kg U3o8/Met. Ton Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Uranium Uranium 128g/mt
  • Year 1977
    Material PYR
    Accuracy Accurate
    Description Ap_Grade: ^0.353 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 0g/mt
  • Year 1980
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.141 Kg U3o8/Met Ton Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Uranium Uranium 141g/mt
  • Year 1980
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.427 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 0g/mt
  • Year 1981
    Material U
    Accuracy Accurate
    Description Ap_Grade: ^0.328 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 0g/mt
  • Year 1981
    Material ORE U
    Accuracy Accurate
    Description Ap_Grade: ^0.144 Kg U308/Met Ton Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Uranium Uranium 144g/mt
  • Year 1982
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.299 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 0g/mt
  • Year 1983
    Material PYR
    Accuracy Accurate
    Description Ap_Grade: ^0.141 Kg U3o8/Met Ton Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Uranium Uranium 141g/mt
  • Year 1984
    Material U
    Accuracy Accurate
    Description Ap_Grade: ^100% H2s04
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    H2sO4 Hydrogen Hydrogen 100wt-pct
  • Year 1984
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.147 Kg U308/Met Ton Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Uranium Uranium 147g/mt
  • Year 1986
    Period 1986
    Material ORE
    Description Cp_Grade: ^0.383 Toz Au And 0.210 Kg U308/Met Ton Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Uranium Uranium 210g/mt
    Major Ore Gold Gold 0g/mt
  • Year 1986
    Period 1986
    Material ORE
    Description Cp_Grade: ^0.383 To2 Au/Met Ton And 0.210 Kg U308/Met Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Uranium Uranium 210g/mt
    Major Ore Gold Gold 0g/mt

Comments on the production information

  • ORE VOLUMES TREATED FOR U3O8 ARE INCLUDED IN (AND ARE PART OF) TOTAL ORE VOLUMES MILLED ; PYRITE - HAARTEBEESTFONTEIN ANNUAL REPORT 1978

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 18268000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 11.912 g/mt Gold Major 1986
    Uranium U3O8 0.00021 wt-pct Uranium Minor 1986

Comments on the reserve resource information

  • CHAMBER OF MINES OF SOUTH AFRICA - 1986 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986

Workings at the site

  • Type of workings Underground
    Overall depth 2400M

Comments on the workings information

  • MINING METHOD: CROSSCUTS FROM SHAFTS TO ORE HORIZON, AND DRIVES ALONG STRIKE AND WINZES DOWN-DIP COMPRISE DEVELOPMENT. STOPPING & BACKFILLING ("SCATTER MINING") WITH CRIB TIMBER SUPPORT AND PILLARS COMPLETE MINING PHASE. 40 % OF MATERIAL MINED IS BACKFILLED. 8 VERTICAL SHAFTS CURRENTLY IN USE

Comments on development

  • TOTAL$: 8.7 ( 1976 ) ; MILL.CAP: 2.9 MIL. MET. T/YR. ; ECON.YEAR: 1971 ; ECON.COM: TOTAL INVESTMENTS REPRESENTS CAPITAL EXPENDITURE DURING 1976 ONLY. A MEDIUM GRADE GOLD AND URANIUM PRODUCER WITH REASONABLE OPERATING COSTS ($74.37 /TR. OZ. OF GOLD RECOVERED IN 1976 ). RECOVERIES ARE FROM ONE ORE HORIZON (REEF) ONLY (VAAL REEF). URANIUM VALUES CONSISTENT AND EXPECTED TO CONTRIBUTE IMPORTANTLY TO FUTURE PROFITS. EST. MINE LIFE: 25 YEARS.

Reference information

Bibliographic references

  • Deposit

    ANGLO-TRANSVAAL CONSOLIDATED INVESTMENT COMPANY, LIMITED, ANNUAL REPORT; 1976

  • Deposit

    MINING JOURNAL QUARTERLY REVIEW OF SOUTH AFRICAN GOLD SHARES, VOL. 19 , NO. 1 ; MAY 1975

  • Deposit

    SOUTH AFRICAN MINING & ENGINEERING JOURNAL, JUNE 1975

  • Deposit

    MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1976

  • Deposit

    MINING JOURNAL, 1977, DEVELOPMENT AND MINING RESULTS: V. 288.

  • Deposit

    MERTIE, 1969, ECONOMIC GEOLOGY OF PLATINUM: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630.

  • Deposit

    IVOR JONES, ROY AND COMPANY, INC., SOUTH AFRICAN GOLD SHARES: JOHANNESBURG, IVOR JONES, ROY AND COMPANY, INC.

  • Deposit

    HARTEBEESTFONTEIN GOLD MINING COMPANY LIMITED, 1976, ANNUAL REPORT, HARTEBEESTFONTEIN GOLD MINING COMPANY LIMITED.

  • Production

    CHAMBER OF MINES OF SOUTH AFRICA;

  • Production

    CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1983.

  • Production

    PYRITE PRODUCTION-HARTEBEESTFONTEIN ANNUAL REPORT-1983;

  • Production

    CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984.

  • Production

    PYRITE PRODUCTION FROM HARTEBEESTFONTEIN ANNUAL REPORT - 1984;

  • Production

    CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985.

  • Production

    PYRITE AND SULPHURIC ACID - HARTEBEESTFONTEIN ANNUAL REPORT - -1985;

  • Production

    CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986.

  • Production

    PYRITE AND SULPHURIC ACID PRODUCTION FROM MINE ANNUAL REPORT.

  • Production

    ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA - 1980;

  • Production

    CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981;

  • Production

    CHAMBER OF MINES ANALYSIS OF WORKING RESULTS PYRITE PRODUCTION FROM HARTEBEESTFONTEIN ANNUAL REPORT;

  • Production

    ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1978;

  • Production

    AU. AND U: ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER 1977.

  • Production

    PYRITE FROM HARTEBEESTFONTEIN GOLD MINE ANNUAL REPORT 1977.

General comments

Subject category Comment text
Deposit MAX THICKNESS REFERS TO STOPPING WIDTH OF VAAL REEF. ACTUAL THICKNESS OF THE VAAL REEF VARIES FROM LESS THAN ONE CENTIMETER TO OVER ONE METER. MINING AREA IS DIVIDED INTO 3 SECTIONS BY 3 MAJOR FAULTS WITH VERTICAL DISPLACEMENTS OF 300, 1000 AND 2000 METERS. DEPTH TO BOTTOM REFERS TO MAXIMUM DEPTH OF THE VAAL REEF BETWEEN THESE FAULTS.
Deposit THIS RECORD INCLUDES DATA FROM DUPLICATED RECORD M046870 WHICH HAS BEEN DELETED FROM THE DATABASE.
Deposit INFORMATION MERGED FROM RECORD NUMBER W028231 ; W028739 ; W030763 ; W032331 ; W032925 ; W033093 ; W033777 ; W044642 ; W055280

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1977 Sweetwood, Charles W. Department of State
Updater 01-JUL-1987 Mccarter, Lorna D Department of State
Updater 01-OCT-1978 Sweetwood, Charles W. Department of State
Updater 01-APR-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-JUL-1984 Mccarter, Lorna D Department of State
Updater 01-JUL-1983 Mccarter, Lorna D. Department of State
Updater 01-JUN-1985 Mccarter, Lorna D Department of State
Updater 01-MAY-1986 Mccarter, Lorna D Department of State
Updater 01-JUN-1987 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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