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Montrose Hendriksplaats

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. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10158751
MRDS ID W028410
MAS/MILS ID 7910200038
Record type Site
Current site name Montrose Hendriksplaats
Alternate or previous names Montrose, Hendriksplaats
Related records 10079237

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 30.15831, -24.62586 (WGS84)
Elevation 1200
Location accuracy 10000(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
Chromite Unknown
Enstatite Unknown
Feldspar Unknown
Pyroxene Unknown

Nearby scientific data

Ore Body (1) 30.15831, -24.62586
ListMap

Economic information

Ore body information

  • Strike N00E
    Dip 12W
    Thickness 1.2M
    Length 4000M
    Width 1443M
    Depth to top 150M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control IGNEOUS
    Secondary Ore Control LITHOLOGY
    Strike And Dip N00E:12W
    Minimum Depth to Top 0
    Date of Last Modification 930308

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 Large
Significant Yes
Mining method Open Stope - Breast Stoping
Year of first production 1956
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity

Mining district

District name East Bushveld Complex

Ownership information

  • Type Owner
    Owner General Mining And Finance Corp.
    Interest 100
    Home office South Africa
    Year 1993
  • Type Operator
    Owner Transvaal Mining And Finance Co. Ltd.
    Home office South Africa
    Year 1993

Production statistics

  • Year 1977
    Description Annual Production 400000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Chromium Chromium 400000mt
  • Year 1978
    Description Annual Production 362285 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 362285mt
  • Year 1979
    Description Annual Production 396000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 396000mt
  • Year 1980
    Description Annual Production 487000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 487000mt
  • Year 1981
    Description Annual Production 476000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 476000mt
  • Year 1982
    Description Annual Production 289000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 289000mt
  • Year 1983
    Description Annual Production 256000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 256000mt
  • Year 1984
    Description Annual Production 280000 Mt Product
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Chromium Chromium 280000mt

Comments on the production information

  • LINE 012 IS THE ASSUMED ANNUAL PRODUCTION AT 300 METER DEPTH FOR AVAIL. STUDY 1/89. TO 600 METER DEPTH WOULD LAST TO 2061 AT 500,000 MT ORE/ YEAR.
  • THE MILL PRODUCES 3 PRODUCTS: 25% OF THE OUTPUT IS LUMP ORE (+15 MM.) AT 41% CR2O3, 75% OF THE OUTPUT AS CHEMICAL GRADE AND FOUNDRY GRADE CONCENTRATES (SANDS) AT ABOUT 46% CR2O3. IT IS NOT KNOWN HOW MUCH OF THE OUTPUT IS FOUNDRY GRADE (HIGH MGO CONTENT). ASSUMPTION FOR THIS STUDY IS THAT ALL OF THE CONCENTRATE OUTPUT IS UTILIZED FOR FERRO- CHROME PRODUCTION .
  • PERCENT RECOVERY IS PER INDIVIDUAL PRODUCT. THE TOTAL RECOVERY ADDS UP TO 88.1. THE RUN OF MINE ORE AT MONTROSE IS 38 % CR2O3.

Comments on the reserve resource information

  • 75% PROBABILITY LEVEL IN Q-MAT.1 IS THE 1/89 IN-SITU RESOURCE TO A VERTICAL DEPTH OF 300 M. INCLUDES BOTH LUMP AND CHIP ORE. 75% PROBABILITY LEVEL IN Q-MAT 2 IS THE 1/89 RECOV. RESOURCE TO DEPTH OF 300 M.
  • HENDRIKSPLAATS 281 KT FARM (ALL). 500,000 MTPY ROM FOR : 80,000 MTPY LUMP AT 41.0 %CR2O3, 160,000 MTPY FINES AT 40.0 %CR2O3 AND 150,000 MTPY CONCS. AT 47.0 % CR2O3. NOTE: FULL DESIGN CAP.OF NO.3 SHAFT WAS 660,000 MTPY ROM. STEELPOORT SEAM= 1.2 M THICK, DIP = 12 DEGS.
  • 1/89 INSITU DEMO.TONNAGE= TO 300 M VERT.DEPTH ON HENRIKSPLAATS FARM ONLY. 90 PCT RECOV.

Workings at the site

  • Type of workings Underground
    Overall depth 150M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method BREAST STOPING 10-30
    Percent Recovery 88
    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
    Number of Shafts 3
    Length of Inclines (m) 290
    Slope of Inclines 12
    Number of Inclines 3
    1st Condition of Workings OPEN
    Capacity 2000
    Capacity Units MT ORE/DAY
    Unit Production Cost 16.73
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1989

Reference information

Bibliographic references

  • Deposit

    GEOL. SOC. SOUTH AFRICA, TRANS. V.62, 1959, P.59-71.

  • Deposit

    RANKIN, G., 1975, CHROMIUM AND FERROCHROMIUM IN S. AFRICA, N

  • Deposit

    ISSUE.

  • Deposit

    STAFF, 1959, GEOLOGICAL SOCIETY OF SOUTH AFRICA, V.62, P. 59

  • Deposit

    -71.

  • Deposit

    HECKROODT,R.O.1959.THE GEOLOGY AROUND THE DUNITE PIPE ON

  • Deposit

    DRIEKOP.TRANS.GEOL.SOC.OF S.AFRICA.V.62.1959.PP.59-71.

  • Deposit

    DE WET,J.F.1952.CHROMITE INVEST.-PART III,VARIATIONS IN THE

  • Deposit

    COMPOSITION OF THE PURE CHROMITE METAL FROM THE EASTERN

  • Deposit

    CHROME BELT,LYDENBURG DISTRICT.JOURNAL OF CHEMICAL,

  • Deposit

    METALLURGICAL AND MINING SOCIETY OF S.AFRICA,JAN.1952,

  • Deposit

    PP.143-155.

  • Deposit

    WORLD MINING.NEW CHROMITE MINE EXPANSIONS IN SOUTH AFRICA.

  • Deposit

    SEPT.1977,PP.114-115.

  • Deposit

    UNION OF SOUTH AFRICA GEOL.SURVEY.THE TRANSVAAL CHROMITE

  • Deposit

    DEPOSITS,EASTERN BELT.PLATE I.BULLETIN NO.10.

  • Deposit

    SIEMS,P.1976.CHROMITE MINES AND RESOURCES IN THE REPUBLIC

  • Deposit

    OF S.AFRICA.MINERALS AVAIL.SYSTEM.DEC.1976.PP.21-23.

  • Deposit

    BALLEN,R.F. "THE IMPLICATION OF SOUTH AFRICA AND ZIMBABWE

  • Deposit

    ON THE AMERICAN FERRUCHROME INDUSTRY." THES IS COLORADO

  • Deposit

    SCHOOL OF MINES. 1981

  • Deposit

    CAMERON,N. EUGENE."CHROMITE DEPOSITS OF THE EASTERN PART OF

  • Deposit

    THE BUSHVELD COMPLEX." PP 131-168.

  • Deposit

    COERTZE,F.J. AND C.B. COETZEE. "CHROMIUM." PP.117-122.

  • Deposit

    CORIN,E.R."FERROUS AND NON-FERROUS MINES AND WORKS IN SOUTH

  • Deposit

    AFRICA." DIRECTORY NO. 3/79. MINERALS BUREAU,DEPARTMENT

  • Deposit

    OF MINES,REPUBLIC OF SOUTH AFRICA.

  • Deposit

    RANKIN,G."CHROMIUM AND FERRO-CHROME IN SOUTH AFRICA."SANDERS

  • Deposit

    AND TAYLOR. NOVEMBER 1975. PP.29-38.

  • Deposit

    ROSKILL INFORMATION SERVICE LIMITED."THE ECONOMICS OF

  • Deposit

    CHROMIUM." THIRD EDITION. 1978. P.13.

  • Deposit

    SIEMS,P.L.,E.M. CRIST, L.E. SHECHAN,AND B.BHATT."CHROMITE

  • Deposit

    MINES AND RESOURCES IN THE REPUBLIC OF SO. AFRICA."

  • Deposit

    UNIVERSITY OF IDAHO. DECEMBER 1976. PP. 1-34.

  • Deposit

    "THE CHROME INDUSTRY IN SOUTH AFRICA." P.17

  • Deposit

    THE TEX REPORT COMPANY LIMITED. PP.106-112 AND 128.

  • Deposit

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

  • Deposit

    THE LARGEST REPOSITORY OF MAGMATIC ORE DEPOSITS IN THE

  • Deposit

    WORLD." MAGMATIC ORE DEPOSITS, A SYMPOSIUM. PP.1-22.

  • Deposit

    SILK M H, 1988, "WORLD CHROMITE RESOURCES 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.

General comments

Subject category Comment text
Deposit LOCATED IN LYDENBURG DISTRICT ON FARM HENDRIKSPLAATS 281 KT 13 KM NW OF STEELPOORT IN 1976-MINE SERVICED BY 3 WINZES (AT MINUS 14 TO 17 DEGREES) PLUS ONE VERTICAL SHAFT(COMMISSIONED 1970-TO DEPTH OF 152 M. IN 1977-NEW INCLINE SHAFT BEING SUNK(-11 DEGREES,CROSS- SECTIONAL AREA OF 11.8SQ.M.,TOTAL LENGTH OF 914 M, SERVING 3 LEVELS,CONVEYOR BELT EQUIPPED). ALSO IN 1977-NEW CONCENTRATOR BEING BUILT ADJACENT TO NEW SHAFT. TOTAL CAPACITY OF NEW SHAFT & MILL TO BE 600,000 MTPY RAW ORE HOISTED-EST.COST $5,750,000 FOR EXPANSION. AT MILL INITIAL SCREENING PRODUCES -3MM FINES,+40MM LUMPS AND +3MM,-40MM MIDDLING WHICH GOES TO TO ROD MILL.LUMP OR IS HANDSORTED. PRODUCTS:1975:40,000 MT OF LIMP ORE(41%CR2O3) 120,000 MT OF FINES-CHEMICAL&FOUNDRY SAND(44- 46%CR2O3). PLANNED TOTAL PROD.BY 1980 TO BE 550,000 MTPY PRODUCTS (FINES&LUMPS). POORT ARE TRUCKED 16 KM. IN 1978 WHEN NEW SHAFT&MILL IN OPERATION EMPLOYMENT WILL BE 36 WHITES &650 BLACKS-AT 1975 CAPACITY EMPLOYMENT WAS 23 WHITES &600 BLACKS.

Reporter information

Type Date Name Affiliation Comment
Reporter 08-MAR-93 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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