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Erfdeel-Dankbaarheidfreegold S.

Plant in Free State, South Africa with commodities Gold, Silver, Sulfur, Uranium
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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. Mineral rights holdings
  12. Ownership information
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10280180
MRDS ID W014846
MAS/MILS ID 7910150020
Record type Site
Current site name Erfdeel-Dankbaarheidfreegold S.
Alternate or previous names Erfdeel-Dankbaanheid
Related records 10089217, 10304882, 10191297

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 26.85149, -27.99654 (WGS84)
Elevation 1370
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Free State(province)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
South Africa Free State

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Sulfur Secondary
Uranium Secondary

Materials information

Materials Type of material
Gold Unknown
Pyrite Unknown
Quartz Unknown
Silver Unknown
Uraninite Unknown

Nearby scientific data

Ore Body (1) 26.85149, -27.99654
ListMap

Economic information

Ore body information

  • Strike N45E
    Dip 20E
    Depth to top 1650M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 OTHER
    Type of Orebody #2 STRATIFORM
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control FOLDING
    Degree of Wallrock Alter. NONE
    Strike And Dip N45E:20E
    Minimum Depth to Top 900
    Date of Last Modification 851226
  • Area 4130HA
    Field Value
    Total Surface Area (HA) 4130
    Date of Last Modification 910418

Comments on the geologic information

  • BASAL REEF IS AT THE BASE OF THE UPPER DIVISION OF THE WITWATERSRAND SYSTEM.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1979
Plant type Beneficiation (Mill)
Plant subcategory Solvent Extraction-Electrowin
Milling method Hydrometallurgy Unspecified

Mining district

District name Orange Free State Gold Fields

Mineral rights holdings

Type of mineral rights Federal Lease

Ownership information

  • Type Owner-Operator
    Owner Western Holdings Ltd.
    Interest 100
    Home office South Africa
    Year 1982
  • Type Owner
    Owner Anglo American Corp. Of South Africa, Ltd.
    Home office South Africa
    Year 1982

Comments on the ownership information

  • FREE STATE SAAIPLAAS AND THE W. HOLDINGS COMPLEX ARE ADMINISTERED BY ANGLO AMERICAN CORP. OF S. AFRICA.

Comments on the production information

  • 19 BOREHOLES DRILLED FROM 1944-1951. 3 HOLES RE-OPENED IN 1968-1969, TO CARRY OUT DEFLECTIONS. 4 NEW FILL-IN HOLES DRILLED FROM 1973-1978, PLUS ONE OLD HOLE RE-OPENED. 17, OF 23, BOREHOLES INTERSECTED BASAL REEF. DEVELOPMENT DECISION MADE IN 1981. DEVELOPMENT ASSUMED TO START IN JAN. 1982, FOR ETD ANALYSIS.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Indicated 62000000mt ore
    Demonstrated 62000000mt ore
    Total resources 62000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4.5 g/mt Gold Major 1981

Comments on the reserve resource information

  • WAS UPDATED FOR THE 1992 AU AVAILABILITY STUDY AS PART OF PRESIDENT BRAND (FREE GOLD SOUTH)--SEQ.NO.791-015-0003).
  • TOTAL THEORETICAL TONNAGE OVER ENTIRE 4,130 HA LEASE AREA WOULD BE ABOUT 120 MILLION MT VS. PUBLISHED RECOVERABLE OF 62 MILLION MT FOR 75 PCT PROB. LEVEL. USED AVG. OF THE TWO = 90 MILLION MT AT AVG. MINING WIDTH OF 1.35 M.
  • PUBLISHED RECOVERABLE TONNAGE=62 MILLION MT, AT 4.7 G/MT.

Workings at the site

  • Type of workings Underground
    Overall depth 2300M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BREAST STOPING 10-30
    Percent Waste Rock 28
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 2
    1st Condition of Workings OPEN
    Capacity 7714
    Capacity Units MT ORE/DAY
    Unit Production Cost 37.04
    Units of Production $/MT ORE
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • ERFDEEL-DANKBAANHEID MILL PROPOSED TO COME ON STREAM IN 1988, AT 2,700,000 MTPY.
  • ERFDEEL-DANKBAANHEID MILL PROPOSED TO BE LOCATED AT NO. 1 SHAFT SYSTEM, WITH ORE FROM NO. 2 SHAFT RAILED 3 KM TO MILL.
  • 1 SHAFT SYSTEM BEING SUNK FOR INITIAL DEVELOPMENT(NO. 1). NO. 2 SHAFT (TO THE NORTH) HAS BEEN SITED, AS OF 1982. MINE OP COST=WTD.AVG. FOR ALL 4 PROPERTIES IN W.HLDGS.CX. MILL OP COST=WTD.AVG. FOR ALL 4 PROPERTIES IN W.HLDGS.CX.

Reference information

Bibliographic references

  • Geology

    ANHAEUSSER, C.R. 1976, THE NATURE AND DISTRIBUTION OF

  • Geology

    ARCHAEN GOLD MINERALIZATION IN SOUTHERN AFRICA. MINERALS

  • Geology

    SCI. ENGNG., V. 8, NO. 1, PP. 46-84.

  • Geology

    BOYLE, R.W. 1979, THE GEOCHEMISTRY OF GOLD AND IT'S

  • Geology

    DEPOSITS. GEOLOGICAL SURVEY OF CANADA, BULL. 280, 584 PP.

  • Geology

    HAUGHTON, S.H., ED. 1964A, THE GEOLOGY OF SOME ORE

  • Geology

    DEPOSITS IN SOUTHERN AFRICA. V. 1, GOLD DEPOSITS OF THE

  • Geology

    WITWATERSRAND BASIN. GEOL. SOC. S. AFRICA, JOHANNESBURG,

  • Geology

    625 PP.

  • Geology

    LIEBENBERG, W.R. 1972, MINERALOGICAL FEATURES OF GOLD

  • Geology

    ORES IN SOUTH AFRICA. PUBLISHED IN GOLD METALLURGY IN SOUTH

  • Geology

    AFRICA, EDITED BY R.J. ADAMSON. CHAMBER OF MINES OF S. AFR.

  • Geology

    MINTER, U.E.L. 1976, DETRITAL GOLD, URANIUM, AND PYRITE

  • Geology

    CONCENTRATIONS PILATED TO SEDIMENTOLOGY IN THE PRECAMBRIAN

  • Geology

    VAAL REEF PLACER, WITWATERSRAND, SOUTH AFRICA. ECONOMIC

  • Geology

    GEOLOGY, V. 71, PP. 157-176.

  • Geology

    PRETORIUS, D.A. 1981, GOLD AND URANIUM IN QUARTZ-PEBBLE

  • Geology

    CONGLOMERATES. ECONOMIC GEOLOGY 75TH ANNIVERSARY VOLUME,

  • Geology

    PP. 117-138.

  • Geology

    PRETORIUS, D.A. 1975, THE DEPOSITIONAL ENVIRONMENT OF

  • Geology

    THE WITWATERSRAND GOLDFIELDS. A CHRONOLOGICAL REVIEW OF

  • Geology

    SPECULATIONS AND OBSERVATIONS. MIN. SCI. ENGNG., V. 7,

  • Geology

    NO. 1, PP. 18-47.

  • Geology

    SMITH, N.D., AND W.E.L. MINTER. 1980, SEDIMENTOLOGICAL

  • Geology

    CONTROLS OF GOLD AND URANIUM IN TWO WITWATERSRAND PALEO-

  • Geology

    PLACERS. ECONOMIC GEOLOGY, V. 75, PP. 1-14.

  • Production

    ADAMSON, R.J. (ED.). 1972, GOLD METALLURGY IN SOUTH

  • Production

    AFRICA, CHAMBER OF MINES OF SOUTH AFRICA, 452 PP.

  • Production

    FINANCIAL TIMES. 1981, MINING INTERNATIONAL YEARBOOK

  • Production

    (SELECTED EXCERPTS).

  • Production

    KING, A.. 1949, GOLD METALLURGY ON THE WITWATERSRAND.

  • Production

    TRANSVAAL CHAMBER OF MINES, 458 PP.

  • Production

    MCQUISTON, F.W. AND R.S. SHOEMAKER. 1975, GOLD AND

  • Production

    SILVER CYANIDATION PLANT PRACTICE. SOCIETY OF MINING ENG.

  • Reserve-Resource

    MINING JOURNAL. OFFICIAL PROPOSALS FOR ERFDEEL-

  • Reserve-Resource

    DANKBAANHEID. JANUARY 9, 1981.

  • Deposit

    CHAMBER OF MINES OF SOUTH AFRICA, 1981, RAND REFINERY,

  • Deposit

    P.R.D. SERIES NO. 255, 20PP.

  • Deposit

    CHAMBER OF MINES OF SOUTH AFRICA, 1980, GOLD IN SOUTH

  • Deposit

    AFRICA, P.R.D. SERIES NO. 241, 28PP.

  • Deposit

    CHAMBER OF MINES, 1980, OVERVIEW OF THE SOUTH AFRICAN

  • Deposit

    MINING INDUSTRY.

  • Deposit

    ELEVATORSKI, E.A. 1981, GOLD MINES OF THE WORLD.

  • Deposit

    PUBLISHED BY MINOBRAS, PP. 78-86.

  • Deposit

    POTTS, D. 1981, THE SOUTH AFRICAN GOLD MINING INDUSTRY,

  • Deposit

    1981. PUBLISHED BY CONSOLIDATED GOLD FIELDS, LTD., PP.17-85.

  • Deposit

    GOLD INSTITUTE. 1981, GOLD REGULATIONS AND TAXES FOR

  • Deposit

    MINING, REFINING, MANUFACTURING AND TRADE IN THIRTEEN

  • Deposit

    COUNTRIES. PP. 74-79.

  • Deposit

    CHAMBER OF MINES OF SOUTH AFRICA. 1982, ANALYSIS OF

  • Deposit

    WORKING RESULTS, OCTOBER-DECEMBER, 1981, 8 PP.

  • Deposit

    CHAMBER OF MINES OF SOUTH AFRICA. 1981, 91ST ANNUAL

  • Deposit

    REPORT AND STATISTICAL TABLES. 116 PP.

  • Deposit

    MINING JOURNAL RESEARCH SERVICES. 1982, PRODUCTION AND

  • Deposit

    CAPITAL EXPENDITURES FOR THE SOUTH AFRICAN GOLD MINES, 1966-

  • Deposit

    1981.

  • Deposit

    MINING JOURNAL RESEARCH SERVICES. 1982, SUMMARY REPORT

  • Deposit

    OF PRODUCTION AND RECOVERY FOR THE SOUTH AFRICAN GOLD MINES,

  • Deposit

    1966-1981.

  • Deposit

    MOHIDE, T.F. 1981, GOLD MINERAL POLICY BACKGROUND PAPER

  • Deposit

    NO. 12. ONTARIO MINISTRY OF NATURAL RESOURCES, PP. 84-112.

  • Deposit

    STORRAR, C.D. 1981, SOUTH AFRICAN MINE VALUATION.

  • Deposit

    CHAMBER OF MINES OF SOUTH AFRICA, 470 PP.

  • Deposit

    MINING MAGAZINE. FURTHER ACTIVITY IN THE OFS. SEPT.

  • Deposit

    1980, P. 185.

  • Deposit

    WORLD MINING. HUGE GOLD MINING COMPLEX TO BE BUILT.

  • Deposit

    APRIL 1981, 67 PP.

  • Deposit

    WORLD MINING. NEW GOLD COMPLEX PLANNED FOR THE FREE

  • Deposit

    STATE. OCT. 1980, P. 75.

  • Deposit

    MINING JOURNAL. QUARTERLY REVIEW OF SOUTH AFRICAN GOLD

  • Deposit

    SHARES, EXCERPTS. 2/80-8/81.

General comments

Subject category Comment text
Deposit G-REC 1 = BASAL REEF (ONLY MINEABLE RESOURCE BEING LOOKED AT FOR DEVELOPMENT, AS OF 1982).

Reporter information

Type Date Name Affiliation Comment
Reporter 14-DEC-1994 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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