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Leslie Gold Mine

Producer in South Africa with commodities Gold, PGE, Platinum, Osmium, Iridium, Ruthenium, Rhodium, Silver, Subbituminous, Sulfur-Pyrite, Uranium
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Geologic information

Identification information

Deposit ID 10078493
MRDS ID W026841
Record type Site
Current site name Leslie Gold Mine

Geographic coordinates

Geographic coordinates: 29.03477, -26.49658 (WGS84)
Elevation 1661
Relative position 18 KILOMETERS SOUTHEAST OF THE TOWN OF LESLIE; 19 KILOMETERS WEST OF THE TOWN OF TRICHARDT
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Geographic areas

Country
South Africa

Commodities

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

Comments on the commodity information

  • GOLD, ONLY, IS RECOVERED AT THIS OPERATION. A LOW GRADE PRODUCER WITH LIMITED MINE LIFE. SUBBITUMINOUS COAL UNCONFORMABLY OVERLIES GOLD REEF AND MAY BE RECOVERED FOLLOWING DEPLETION OF GOLD RESERVES. 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
Chalcopyrite Ore
Galena Ore
Pyrrhotite Ore
Uraninite Ore

Alteration

  • (Local) None

Analytical data

Result COAL ANALYTICAL DATA NOT AVAILABLE. COMPOSITION OF PLATINOIDS: IR = 31.7%, OS = 35.8%, RU = 13.7%, PT = 17.5%, RH = 1.3%

Mineral occurrence model information

Model code 193
USGS model code 29a
BC deposit profile C04
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 Ecca Series, Karroo System; Shale, Sandstone & Coal;Transvaal System--Dolomite;Witwatersrand System (Upper Division)-Quartzite, Shales, Grits And Conglomerates
    Rock description Ecca Series, Karroo System; Shale, Sandstone & Coal;Transvaal System--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) 29.03477, -26.49658
ListMap

Geologic structures

Type Description Terms
Regional Unique Continuity Of Gold-Bearing Horizons Over Extended Area, Though Well Marked By Folding, Faulting And (Locally) Erosion And Redeposition Of Overlying Conformable Sediments.
Local Synclinal Basin Separated From Central And East Rand Occurrences Of The Witwatersrand System. Unconformable Ecca Series, Karroo System Shales, Sandstones And Coal Are Not Notable. Dips Variable; Faulting Severe.

Ore body information

  • General form TABULAR/BLANKET
    Dip 15 - 25 DEG. NORTH
    Thickness 1.2M
    Depth to bottom 1524M

Controls for ore emplacement

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

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1951
Discoverer Capital Mining Areas; A Subsidiary Of Union Corporation Limited.
Discovery method Ore-Mineral In Place
Year of first production 1962

Mining district

District name Evander Area Of The Witwatersrand Goldfields

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Leslie Gold Mines Ltd.
  • Type Owner
    Owner Gencor (General Mining Union Corp.) And Others

Production statistics

  • Year 1976
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.149 Tr. Oz. Au/Met. Ton Of Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1976
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.152 Toz Au/Met. Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1977
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^0.125 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1977
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.142 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1978
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.110 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1978
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.110 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1979
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.249 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1979
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.096 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1980
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.120 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1980
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^0.089 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1981
    Material ORE AU
    Accuracy Accurate
    Description Ap_Grade: ^0.080 Toz Au/Met Ton Ore Milled
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1986
    Period 1986
    Material ORE
    Description Cp_Grade: ^0.193 To2 Au/Met Ton Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt
  • Year 1986
    Period 1986
    Material ORE
    Description Cp_Grade: ^0.193 Toz Au/Met Ton Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Gold Gold 0g/mt

Comments on the production information

  • WORKS KIMBERLY REEF GROUP. AU/PT RECOVERY = 125:1.

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 205,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 6 g/mt Gold Major 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 1524M

Comments on the workings information

  • MINING METHOD: CROSSCUTS FROM THE SHAFTS TO ORE HORIZON (REEF) AT 150 - METER INTERVALS; DRIVES ALONG THE STRIKE AND WINZES DOWN - DIP COMPLETE DEVELOPMENT: STOPING & BACKFILLING ("SCATTER MINING") WITH CRIB TIMBER SUPPORT AND PILLARS COMPRISE FINAL MINING PHASE. FAULTING A MINOR CONSIDERATION ONLY. OVERLYING (NEAR-SURFACE) COAL OCCURRENCE UNIQUE AND MAY THUS GIVE MINE EXTENDED LIFE AFTER DEPLETION OF GOLD RESERVES.

Comments on development

  • EXPLORATION NIL. NO ADDITIONAL CAPITAL EXPENDITURE PLANNED. DEVELOPMENT CONFINED TO PREVIOUSLY DELINEATED ORES WITHIN LIMITED CONFINES OF PROPERTY. ; MILL.CAP: 1.5 MIL. MET. T/YR. ; ECON.COM: CAPITAL EXPENDITURE IN 1986 TOTALLED R700,000. THIS WILL INCREASE TO R9.7 MILLION IN 1987.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W026841

Bibliographic references

  • Deposit

    UNION CORPORATION LIMITED, ANNUAL REPORT; 1975

  • Deposit

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

  • Deposit

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

  • Deposit

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

  • Deposit

    COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: JOURNAL SOUTH AFRICA INSTITUTE OF 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

    IVOR JONES, ROY & COMPANY, INC., 1975, SOUTH AFRICAN GOLD SHARES: JOHANNESBURG, IVOR JONES, ROY & COMPANY, INC.

  • Deposit

    LESLIE GOLD MINES LIMITED, COMPANY, (N.D.), COMPANY BROCHURE.

  • Production

    CHAMBER OF MINES OF SOUTH AFRICA ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981 ; 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 ; ANALYSIS OF WORKING RESULTS, 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 MAX THICKNESS REFERS TO APPROXIMATE STOPPING WIDTH OF THE KIMBERLEY REEF; THE ONLY ORE HORIZON RECOVERED AT THIS MINE. DEPTH TO BOTTOM IS MAXIMUM (DOWN-DIP) DEPTH WITHIN CONFINES OF PROPERTY.
Deposit THIS RECORD CONTAINS DATA FROM DUPLICATE RECORD M046346 WHICH HAS BEEN DELETED FROM MRDS.
Deposit INFORMATION MERGED FROM RECORD NUMBER W028233 ; W028703 ; W028730 ; W030760 ; W032334 ; W032928 ; W033096 ; W033780 ; W044645 ; W055283

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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