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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Ntuane

Plant in South Africa with commodity Chromium
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Ownership information
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10183030
MRDS ID W028405
MAS/MILS ID 7910200182
Record type Site
Current site name Ntuane
Related records 10089693

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 26.90975, -25.21336 (WGS84)
Elevation 1200
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country
South Africa

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Apatite Unknown
Chromite Unknown
Hornblende Unknown
Olivine Unknown
Pyroxene Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) 26.90975, -25.21336
ListMap

Economic information

Ore body information

  • Strike N10E
    Dip 10E
    Thickness 0.76M
    Length 7500M
    Width 1572M
    Depth to top 150M
    Field Value
    MAS Matrix # 1
    MAS Column # 2
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control IGNEOUS
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 SILICIFICATION
    Strike And Dip N10E:10E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 3
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 930525

Comments on the geologic information

  • TYPE OF ORE BODY IS LAYERED INTRUSIVE.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1865
Mining method Open Stope - Breast Stoping
Year of first production 1917
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity

Mining district

District name East Bushveld Complex

Ownership information

  • Type Owner
    Owner Rustenburg Mineral Development Co. (Pty.) Ltd.
    Home office South Africa
    Year 1989
  • Type Owner
    Owner Anglo Transvaal Consolidated Investment Co., Ltd.
    Interest 100
    Home office South Africa
    Year 1989
  • Type Operator
    Owner Ntuane Chrome Mines Pty. Ltd.
    Home office South Africa
    Year 1989

Production statistics

  • Year 1977
    Description Annual Production 1977 36000 Mt Products / Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 36000mt
  • Year 1978
    Description Annual Production 1978 25000 Mt Products / Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 25000mt
  • Year 1979
    Description Annual Production 1979 13000 Mt Products / Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 13000mt

Comments on the reserve resource information

  • 75% RESOURCE IS TONNAGE CALCULATED FOR LG 6 SEAM TO VERT. DEPTH OF 300 M (1,900 M ON DIP) AND 150 M (786 M ON DIP). STRIKE LENGTH INVOLVED IS ABOUT 1750 METERS OVER 2 FARMS: Q-MATRIX 1 IS THE IN-SITU RESOURCE WITH COL 1 BEING TONNAGES AT A VERT. DEPTH OF 150 M. COL 2 IS THE TONNAGE DOWN TO 300 M VERT. DEPTH. MATRIX 2 IS THE RECOVERABLE RESOURCE, WITH COL 1 REPRESENTING TONNAGE DOWN TO 150 M VERT. DEPTH AND COL 2 IS THE TONNAGE DOWN TO 300 M VERT. DEPTH.
  • 1/89 INSITU DEM.TONNAGE = TO 300 M VERT. DEPTH; RECOV.=90 %.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method BREAST STOPING 10-30
    Percent Recovery 90
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Length of Inclines (m) 786
    Slope of Inclines 10
    Number of Inclines 1
    1st Condition of Workings OPEN
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1989

Comments on other economic factors

  • TRANSPORTATION COSTS MILL TO SMELTER: $165.88/MT TRANSPORTATION COSTS SMELTER TO REFINERY: $10.00/MT

Reference information

Bibliographic references

  • Deposit

    WORLD MINING. CHROMITE PRODUCTION FROM THE BUSHVELD COMPLEX.

  • Deposit

    SEPT. 1979, PP. 97-101.

  • Deposit

    BUCHANAN, D.L. "CHROMITE PRODUCTION FORM THE BUSHVELD

  • Deposit

    COMPLEX AND ITS RELATIONSHIP TO THE FERROCHROMIUM

  • Deposit

    INDUSTRY." BUREAU OF MINERAL STUDIES, UNIVERSITY OF THE

  • Deposit

    WITWATERSRAND, JOHANNESBURG. 1978. PP. 3-20.

  • Deposit

    CAMERON E.N. AND G.A. DESBOROUGH. "OCCURENCE AND

  • Deposit

    CHARACTERISTICS OF CHROMITE DEPOSITS - EASTERN BUSHVELD

  • Deposit

    COMPLEX." MAGMATIC ORE DEPOSITS SYMPOSIUM. PP. 23 AND

  • Deposit

    31.

  • Deposit

    WLLEMSE, J. "THE GEOLOGY OF THE BUSHVELD IGNEOUS COMPLEX,

  • Deposit

    THE LARGEST REPOSITORY OF MAGMATIC ORE DEPOSITS IN THE

  • Deposit

    WORLD." MAGMATIC ORE DEPOSITS SYMPOSIUM. 1969.

  • Deposit

    PP. 1-21.

  • Deposit

    SILK M H, 1988, "WORLD CHROMITE RESOURCE AND FERROCHROME

  • Deposit

    PRODUCTION", MINTEK SPECIAL PUBL. NO. 11.

  • Deposit

    DAVIDOFF R L, BOYLE E H JR., 1988, "NOTES FROM VISIT TO THE

  • Deposit

    REPUBLIC OF SOUTH AFRICA", USBM, MINERALS AVAIL. FIELD

  • Deposit

    OFFICE.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-MAY-1993 Boyle, Ed U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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