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President Brand Mine

Producer in Free State, South Africa with commodities Gold, Uranium, PGE, Platinum, Osmium, Iridium, Rhodium, Ruthenium, Silver, Sulfur-Pyrite
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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. Ownership information
  17. Production statistics
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10071443
MRDS ID W014839
Record type Site
Current site name President Brand Mine
Related records 10207526

Geographic coordinates

Geographic coordinates: 26.75149, -28.02988 (WGS84)
Elevation 1340
Relative position DUE SOUTH OF, AND ADJOINING, WELKOM CITY LIMITS

Site location context

Political divisions (FIPS codes)

Free State(province)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
South Africa Free State

Commodities

Commodity Importance
Gold Primary
Uranium Secondary
PGE Critical Secondary
Platinum Critical Secondary
Osmium Secondary
Iridium Critical Secondary
Rhodium Critical Secondary
Ruthenium Critical Secondary
Silver Secondary
Sulfur-Pyrite Secondary

Comments on the commodity information

  • A URANIUM PRODUCER AS A MINOR COMMODITY FROM 1955 THROUGH 1966. URANIUM RECOVERIES WILL BE REACTIVATED IN 1977, FROM CURRENT AND ACCUMULATED SLIMES. 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
Sperrylite Ore

Alteration

  • (Local) None

Analytical data

Result COMPOSITION OF PLATINOIDS: IR = 35.3%, OS = 39.6%, RU = 14.8%, PT = 9.1%, RH = 1.2%

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 Upper Elsburg Conglomerates And Quartzites;Karroo System Conglomerates And Shales
    Rock description Upper Elsburg Conglomerates And Quartzites;Karroo System Conglomerates And Shales
  • 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) 26.75149, -28.02988
ListMap

Economic information

Geologic structures

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

Ore body information

  • General form TABULAR/BLANKET
    Strike N - S
    Dip 20 DEG. E
    Thickness 0.2M
    Depth to bottom 2263M

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 Metallic
Deposit size Large
Significant No
Discovery year 1939
Discoverer African And European Investment Company Limited
Year of first production 1954

Mining district

District name Orange Free State Area Of The Witwatersrand Goldfields

Ownership information

  • Type Owner
    Owner Ownership Distribution:
  • Type Owner
    Owner Anglo American Corp. Of South Africa, Ltd. (Management Control)
    Interest 20
  • Type Owner
    Owner Orange Free State Inves. Trust Ltd.
    Interest 20
  • Type Owner
    Owner African And European Inves. Co. Ltd.
  • Type Owner
    Owner The Vereeniging Estates Ltd.
  • Type Operator
    Owner President Brand Gold Mining Co. Ltd.

Production statistics

  • Year 1984
    Period 1984
    Material ORE AU
    Description Cp_Grade: ^0.385 Toz/Au Met Ton Ore And 0.08 Kg U3o8/Met Ton Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 80g/mt
    Ore Gold Gold 11g/mt
  • Year 1985
    Period 1985
    Material ORE
    Description Cp_Grade: ^0.388 Toz Au/Met Ton And 0.08 Kg U308/
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 80g/mt
    Ore Gold Gold 11g/mt

Comments on the production information

  • WORKS THE BIRD REEF GROUP. AU/PT RECOVERY = 3350:1. ; SEE COMMODITY COMMENTS ABOVE

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Total resources 7698000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 11.974 g/mt Gold Major 1984
    Uranium U3O8 0.0008 wt-pct Uranium Minor 1984

Comments on the reserve resource information

  • CHAMBER OF MINES ANALYSES OF WORKING RESULTS - 1984 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985

Workings at the site

  • Type of workings Underground
    Overall depth 2263M

Comments on the workings information

  • MINING METHOD: CROSSCUTS FROM THE SHAFT TO ORE HORIZON (REEF) AT 150 - METER INTERVALS; DRIVES ALONG THE STRIKE AND WINZES DOWN - DIP COMPLETE DEVELOPMENT; STOPING AND BACKFILLING ("SCATTER MINING") WITH CRIB TIMBER SUPPORT AND PILLARS COMPRISE FINAL MINING PHASE.

Comments on development

  • EXPAN$: 9.2 (1976) ; MILL.CAP: 2.9 MIL. MET. T/YR. 1974 ; ECON.COM: A MEDIUM GRADE GOLD AND POTENTIAL URANIUM PRODUCER WITH COSTS AT $60.74/TROY OUNCE OF GOLD RECOVERED (1976). CURRENT RECOVERIES ARE FROM ONE ORE HORIZON (REEF) ONLY (THE BASAL REEF). LIMITED QUANTITIES MAY, HOWEVER, BE MINED LATER FROM THE AREA'S LEADER REEF. CURRENT ESTIMATED MINE LIFE: 17 YEARS.

Reference information

Bibliographic references

  • Deposit

    ANGLO AMERICAN CORPORATION OF SOUTH AFRICA LIMITED; ANNUAL REPORTS: 1974 & 1975

  • Deposit

    PRESIDENT BRAND GOLD MINING COMPANY LIMITED; ANNUAL REPORT; 1975

  • Deposit

    MINERAL RESOURCES OF SOUTH - CENTRAL AFRICA; PELLETIER, R. A.; 1964

  • Deposit

    "THE ORANGE FREE STATE GOLDFIELD" (ANGLO AMERICAN CORPORATION OF SOUTH AFRICA LIMITED); 1960

  • Deposit

    MERTIE, 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 45-48.

  • Deposit

    COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: JOURNAL SOUTH AFRICA INSTITUTE MINING AND METALLURGY, V. 73, NO. 6, P. 3-5.

  • Deposit

    WAGNER, 1929, PLATINUM DEPOSITS AND MINES OF SOUTH AFRICA: STRUIK (PTY) LTD., CAPETOWN 1973, P. 32-40.

  • Deposit

    FEATHER, 1976, MINERALOGY OF THE PLATINUM-GROUP MINERALS IN THE WITWATERSRAND: ECONOMIC GEOLOGY, V. 71, NO. 7.

  • Deposit

    MINING JOURNAL, 1977, V. 288.

  • Deposit

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

  • Deposit

    MINING JOURNAL, 1975, QUARTERLY REVIEW OF SOUTH AFRICAN SHARES: MINING JOURNAL, V. 19, NO. 1, MAY 1975.

  • Production

    ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA (CURRENT YEAR) ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1982 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1983 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981 ; ANALYSIS OF WORKING RESULT, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1979 ; ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA - 1980 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1978 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER, 1977

General comments

Subject category Comment text
Deposit INFORMATION MERGED FROM RECORD NUMBER W028247 ; W028677 ; W028742 ; W030936 ; W032339 ; W032948 ; W033100 ; W033784 ; W044610
Deposit MAX THICKNESS REFERS TO BASAL REEF ORE HORIZON ONLY. DEPTH TO BOTTOM TAKEN AS DEPTH OF BASAL REEF AT NO. 2 SHAFT (AND ADJOINING SUB-VERTICAL SHAFT).
Deposit THIS RECORD INCLUDES DATA FROM DUPLICATE RECORD M046299 WHICH HAS BEEN DELETED FROM MRDS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1977 Sweetwood, Charles W. Department of State
Updater 01-JUN-1985 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-APR-1986 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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