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Ergo

Producer in South Africa with commodities Gold, Uranium, Sulfur, Sulfuric Acid, Sulfur-Pyrite, Silver
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Geologic information

Identification information

Deposit ID 10080862
MRDS ID W032354
Record type Site
Current site name Ergo
Alternate or previous names East Rand Gold and Uranium Company Limited
Related records 10183432

Geographic coordinates

Point of reference Approximate
Geographic coordinates: 25.09406, -28.99506 (WGS84)
Relative position 22 MILES SOUTH EAST OF JOHANNESBURG AND 2 1/2 MILES SOUTH OF BRAKPAN ON THE EAST RAND
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Geographic areas

Country
South Africa

Commodities

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

Nearby scientific data

Approximate (1) 25.09406, -28.99506
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Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Both metallic and non-metallic
Significant No
Year of first production 1978

Mining district

District name East Rand

Ownership information

  • Type Operator
    Owner East Rand Gold And Uranium Co. Ltd.
  • Type Owner
    Owner Anglo American Corp.

Production statistics

  • Year 1982
    Material SAND
    Description Ap_Grade: ^1.4969 Toz Au/Met Ton Sand And Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 1g/mt
  • Year 1983
    Material PYR
    Description Ap_Grade: ^0.660 Ag U 308/Met Ton Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Uranium Uranium 19g/mt
  • Year 1983
    Material SLF
    Description Ap_Grade: ^0.316 Toz Au/Met Ton Slimes Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1983
    Material PYR
    Description Ap_Grade: ^0.561 Kg U308/Met Ton Slimes Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Uranium Uranium 561g/mt
  • Year 1984
    Material SAND/ORE
    Accuracy Accurate
    Description Ap_Grade: ^Head Grade Of Concentrate - 0.363 Kg U308/Met Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Ore Uranium Uranium 363g/mt
  • Year 1984
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^29.59% From Slimes
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 30wt-pct
  • Year 1984
    Material U
    Accuracy Accurate
    Description Ap_Grade: ^ 26.78% From Sand
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Uranium Uranium 27wt-pct
  • Year 1986
    Period 1978-1986
    Material SLIMES
    Description Cp_Grade: ^0.420 Toz Au/Met Ton Slimes Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 0g/mt
  • Year 1987
    Period 1978-1987
    Material AU
    Description Cp_Grade: ^0.580 Kg U308/Met Ton Ore Treated
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    U3O8 Uranium Uranium 580g/mt

Comments on the production information

  • PRODUCTION HAS BEEN CALCULATED TO MARCH 1987, AND INCLUDES PRODUCTION FROM ERGO AND SIMMERGO DIVISIONS. ; PRODUCTION UP TO MARCH 31, 1985 ; PRODUCTION UP TO MARCH 31, 1986 ; PRODUCTION FOR YEAR TO MARCH 31, 1987 ; PRODUCTION UP TO MARCH 31, 1983 ; MINING IS BEING CARRIED OUT ON A LIMITED SCALE AT THE SIMMERGO OPERATION IN ADDITION TO TREATMENT OF SLIMES AT THE ERGO AND NEW (JANUARY-1984) DAGGAFONTEIN OPERATIONS.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Total resources 23,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.653 g/mt Gold Major 1981

Comments on the reserve resource information

  • ANGLO AMERICAN CORP ANNUAL REPORTS, 1978 - 1981

Comments on development

  • TOTAL$: (R) 130.4 ; ECON.COM: A LARGE-SCALE SECONDARY RECOVERY OPERATION FOR GOLD & URANIUM (WITH BYPRODUCT SULFURIC ACID AND OLEUM) FROM OLD SURFACE DUMPS, SLIMES PONDS ETC, AND INCLUDING LATER POSSIBLE UNDERGROUND MINING FROM THE KIMBERLY REEF AT SIMMERGO PROPERTY.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W032354

Bibliographic references

  • Production

    ERGO ANNUAL REPORTS ; ERGO ANNUAL REPORT - 1985 ; ERGO ANNUAL REPORT-1983 ; ERGO ANNUAL REPORT - 1984 ; ERGO ANNUAL REPORT - 1982

General comments

Subject category Comment text
Deposit INFORMATION MERGED FROM RECORD NUMBER W032932 ; W033089 ; W033769 ; W044624 ; W055271 ; W055272

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1982 Mccarter, Lorna D. Department of State
Updater 01-JUL-1987 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
Updater 01-JUN-1985 Mccarter, Lorna D Department of State
Updater 01-MAR-1986 Mccarter, Lorna D Department of State
Updater 01-JUL-1987 Mccarter, Lorna D. Department of State