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Winkelhaak

Plant in South Africa with commodities Gold, PGE, Silver
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Geologic information

Identification information

Deposit ID 10231829
MRDS ID W026846
MAS/MILS ID 7910200066
Record type Site
Current site name Winkelhaak
Related records 10078498

Geographic coordinates

Point of reference Plant
Geographic coordinates: 29.16814, -26.49658 (WGS84)
Elevation 1610
(click for info)

Geographic areas

Country
South Africa

Commodities

Commodity Importance
Gold Primary
PGE Tertiary
Silver Secondary

Nearby scientific data

Plant (1) 29.16814, -26.49658
ListMap

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Metallic
Deposit size Large
Significant Yes
Mining method Filled Stopes
Plant type Leach
Plant subcategory Hydromet
Milling method Hydrometallurgy Unspecified

Ownership information

  • Type Owner-Operator
    Owner Winkelhaak Mines Ltd
  • Type Owner
    Owner General Mining Union Corp (Gencor)

Production statistics

  • Year 1991
    Description Production Of Gold Bullion 12 Metric Tons.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 12mt
  • Year 1992
    Description Production Of Gold Bullion 12 Metric Tons.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 12mt

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Demonstrated 21,000,000mt ore
    Indicated 21,000,000mt ore
    Total resources 21,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 7.9 g/mt Gold Major 1982
    Silver Ag 0.8 g/mt Silver Minor 1982
    PGE Pt 0.1 g/mt PGE Trace 1982
  • Type In-situ
    Estimate year 1982
    Demonstrated 20,000,000mt ore
    Indicated 20,000,000mt ore
    Total resources 20,000,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 6.6 g/mt Gold Major 1982
    Silver Ag 0.7 g/mt Silver Minor 1982
    PGE Pt 0.1 g/mt PGE Trace 1982
  • Type In-situ
    Estimate year 1993
    Demonstrated 4,750,000mt ore
    Indicated 4,750,000mt ore
    Total resources 4,750,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.3 g/mt Gold Major 1993

Comments on the reserve resource information

  • Q-MAT-1 = TONNAGE BEFORE NEW SHAFT. Q-MAT-2 = TONNAGE AFTER NEW SHAFT IS BUILT. RESOURCES ARE FROM UPPER WITWATERSRAND, KIMBERLY REEF. U303 VALUE IS NOT ECONOMIC AT THE PRESENT, BUT OSMIRIDIUM IS SIGNIFICANT. PGM PERCENTAGE COMPRISE OF 34.5% OSMIUM, 32.5% IRIDIUM, 13.5% RUTHENIUM, 10.5% PLATINUM AND 1% RHODIUM.
  • 1989 AU PROD.= 372,016 OZ FROM TREATING 2,046,000 MT ORE. WAS UPDATED FOR THE 1992 AU AVAILABILITY STUDY. 1991 PROD.= 365,361 OZ AU FROM TREATING 1,913,000 TNS ORE.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method FILLED STOPES
    Capacity 6857
    Capacity Units MT ORE/DAY
    Unit Production Cost 26.96
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1981
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ACTUAL
    Mining Method BREAST STOPING 10-30
    Capacity 6857
    Capacity Units MT ORE/DAY
    Unit Production Cost 27.46
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1981

Comments on other economic factors

  • ORE TONNAGE GRADE FOR 1982-1982 IS SLIGHTLY DIFFERENT FROM Q-MAT-1. Q-MAT-1 TONNAGE AND GRADE IS FOR 1984-1990. Q-MAT-2 TONNAGE AND GRADE FOR 1991-1999 WHEN THE NEW SHAFT BECOMES OPERATIONAL.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
U.S. Bureau of Mines Minerals Availability System MAS 7910200066
USGS Mineral Resources Data System MRDS W026846 MAS references MRDS

Bibliographic references

  • Production

    AME MINERAL ECONOMICS, P. 22 (1993).

  • Reserve-Resource

    AME MINERAL ECONOMICS, P. 32 (1993).

  • Deposit

    TOOMBS, R.B., A SURVEY OF THE MINERAL INDUSTRY OF SOUTH

  • Deposit

    AFRICA, MINERAL INFORMATION BULLETIN MR 58, MINERAL

  • Deposit

    RESOURCES DIVISION, DEPARTMENT OF MINES, OTTAWA, 1962.

  • Deposit

    WORLD MINING, WITWATERSRAND GOLD, MAY 1977, PP 50-53.

  • Deposit

    WORLD MINING REGISTER 76-77, MILLER FREEMAN PUBLICATIONS,

  • Deposit

    INC., 1977.

  • Deposit

    MINTER, W.E.L., DETRITAL GOLD, URANIUM, AND PYRITE CONCEN-

  • Deposit

    TRATIONS RELATED TO SEDIMENT GEOLOGY IN THE PRECAMBRIAN

  • Deposit

    VAAL REEF PLACER, WITWATERSRAND, SOUTH AFRICA, ECONOMIC

  • Deposit

    GEOLOGY, V. 71, NO. 1, 1977, PP 157-176.

  • Deposit

    ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORY OF

  • Deposit

    MINING AND MINERAL PROCESSING OPERATIONS, MCGRAW HILL,

  • Deposit

    NEW YORK, 1976.

  • Deposit

    SOUTH AFRICA, GEOLOGICAL SURVEY SPECIAL PUBLICATION NO. 18,

  • Deposit

    1972.

  • Deposit

    MINING ANNUAL REVIEW, MINING JOURNAL, LONDON, 1977, PP 431-

  • Deposit

    443.

  • Deposit

    COETZEE, C.B., MINERAL RESOURCES OF SOUTH AFRICA, GEOLOGICAL

  • Deposit

    SURVEY PUBLICATION, HANDBOOK 7, FIFTH EDITION, 1976,

  • Deposit

    PP 39-74, 233-240.

  • Deposit

    MINING JOURNAL, QUARTER ENDING, JUNE 1977.

  • Deposit

    THE MINERAL RESOURCES OF THE UNION OF SOUTH AFRICA, GEOLOGI-

  • Deposit

    CAL SURVEY PUBLICATION, 1959, FOURTH EDITION.

  • Deposit

    WATERMEYER, G.A. AND HOFFENBERG, S.N., WITWATERSRAND MINING

  • Deposit

    PRACTICE, THE TRANSVAAL CHAMBER OF MINES, GOLD PRODUCERS

  • Deposit

    COMMITTEE, 1932.

  • Deposit

    WINKELHAAF MINES LTD, ANNUAL REPORTS, 1975, 1976.

  • Deposit

    MINING JOURNAL SUPPLEMENT, NOVEMBER 3, 1978.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-AUG-1994 Boyle, Ed U.S. Bureau of Mines