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Consolidated Murchinson Limited

Producer in South Africa with commodities Antimony, Gold, Silver, Arsenic
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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 10111550
MRDS ID W012695
Record type Site
Current site name Consolidated Murchinson Limited
Related records 10280580

Geographic coordinates

Geographic coordinates: 30.86806, -23.79669 (WGS84)
Elevation 381
Relative position NORTHEAST OF LEYDSDORP, NORTHERN TRANSVAAL, 40.2 KM WEST OF PHALABORWA

Site location context

Political divisions (FIPS codes)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country
South Africa

Comments on the location information

  • WORLD'S LARGEST ANTIMONY PRODUCER, OPERATING FROM THE GRAVELOTTE MONARCH, UNITED JACK, WEIGEL AND FREE STATE MINES LOCATED IN IMMEDIATE AREA DESCRIBED.

Commodities

Commodity Importance
Antimony Critical Primary
Gold Secondary
Silver Secondary
Arsenic Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Stibnite Ore

Alteration

  • (Local) Altered Quartz Porphyries In Swaziland System

Analytical data

Result SB: 3.0 %
Result AU: 0.50 - 1.00 GMS/METRIC TON

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Murchison Range Syncline
    Rock description Murchison Range Syncline
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) 30.86806, -23.79669
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Murchison Range Syncline
Type of structure Local
Structure description Drag Folds; Extensive Faulting And Lens - Like Orebodies And Veins

Ore body information

  • General form LENS - LIKE FAULT FISSURE VEINS IN NARROW BELT OF SWAZILAND SCHISTS

Controls for ore emplacement

  • Swaziland System Schists Flanked By Granite Intrusives (The Source Of Mineralization)

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1934
Discoverer Johannesburg Consolidated Investments Co., Ltd. And Anglo - Transvaal Consolidated Investment Co., Ltd.
Year of first production 1935

Mining district

District name Murchison Range Antimony; Gravelotte Area

Ownership information

  • Type Owner
    Owner Johannesburg Consolidated Investments Co., Ltd.
  • Type Owner
    Owner Anglo - Transvaal Consolidated Investment Co., Ltd.
  • Type Operator
    Owner Consolidated Murchison Ltd.

Production statistics

  • Year 1974
    Material ORE SB
    Accuracy Accurate
    Description Ap_Grade: ^3.06 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 3wt-pct
  • Year 1976
    Material CON SB
    Accuracy Accurate
    Description Ap_Grade: ^2.23 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Conc. Antimony Antimony 2wt-pct
  • Year 1976
    Material OVB
    Accuracy Accurate
    Description Ap_Grade: ^57.93 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 58wt-pct
  • Year 1977
    Material OVB
    Accuracy Accurate
    Description Ap_Grade: ^2.60 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 3wt-pct
  • Year 1981
    Material AU
    Accuracy Accurate
    Description Ap_Grade: ^58.72 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Antimony Antimony 59wt-pct
  • Year 1983
    Material ORE SB
    Accuracy Accurate
    Description Ap_Grade: ^59.65% Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 60wt-pct
  • Year 1984
    Period 1969-1984
    Material CON SB
    Description Cp_Grade: ^59.3% Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Conc. Antimony Antimony 59wt-pct
  • Year 1984
    Period 1969-1984
    Material AU
    Description Cp_Grade: ^59.33 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Antimony Antimony 59wt-pct
  • Year 1984
    Period 1969-1984
    Material ORE SB
    Description Cp_Grade: ^2.68 % Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 3wt-pct

Comments on the production information

  • DATA NOT AVAILABLE PRIOR TO 1969 (OVERBURDEN 1972 - 1976 ONLY)

Reserves and resources

  • Type In-situ
    Estimate year 1974
    Total resources 57000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Antimony Sb 3 wt-pct Antimony Major 1974

Workings at the site

  • Type of workings Underground
    Overall depth 1102M

Comments on the workings information

  • EXPLOITABLE DEPOSITS OCCUR IN SHEAR ZONES IN 8 - MILE - LONG SOUTHERN LIMB OF MAJOR SYNCLINE IN MURCHISON RANGE. NUMEROUS FAULT FISSURE VEINS; LENS - LIKE, VARIABLE IN STRIKE DISTANCE AND WIDTH, BUT COMMONLY WITH NEAR - VERTICAL DIPS.

Comments on development

  • ECON.COM: LOW MINING COSTS; MODERN MILL; EFFICIENT DEVELOPMENT; AS CURRENTLY BEING REMOVED AND WASTED

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    CONSOLIDATED MURCHISON LIMITED ANNUAL REPORTS 1973 AND 1974

  • Deposit

    ENGINEERING AND MINING JOURNAL, 1972, ENGINEERING AND MINING JOURNAL.

  • Deposit

    WORLD MINING, 1974, INDUSTRIAL OUTLOOK REPORT ON MINERALS, CERP B - 429, WORLD MINING, JULY 1974.

  • Production

    CONSOLIDATED MURCHISON ANNUAL REPORTS ; CONSOLIDATED MURCHISON LTD ANNUAL REPORT ; CONSOLIDATED MURCHISON LTD. ANNUAL REPORT 1980 ; CONSOLIDATED MURCHISON ANNUAL REPORT 1981 ; CONSOLIDATED MURCHISON ANNUAL REPORT - 1983 ; CONSOLIDATED MURCHISON ANNUAL REPORT 1982 ; CONSOLIDATED MURCHISON ANNUAL REPORT 1977

General comments

Subject category Comment text
Deposit INFORMATION MERGED FROM RECORD NUMBER W027506 ; W028266 ; W028671 ; W028672 ; W030996 ; W032245 ; W033031 ; W033171
Deposit Discovery Year: COMPANY FORMED IN 1934

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1976 Sweetwood, Charles W. Department of State
Updater 01-JUL-1985 Mccarter, Lorna D Department of State
Updater 01-NOV-1977 Sweetwood, Charles W. 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-MAR-1981 Mccarter, Lorna D. Department of State
Updater 01-JUL-1982 Mccarter, Lorna D. Department of State
Updater 01-JUN-1984 Mccarter, Lorna D. Department of State
Updater 01-JUN-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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