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  3. Mineral Resource Data System (MRDS)

Black Mountainaggeneys Area

Prospect in South Africa with commodities Copper, Lead, Silver, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Mining district
  9. Ownership information
  10. Reserves and resources
  11. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10183005
MRDS ID W018940
MAS/MILS ID 7910050042
Record type Site
Current site name Black Mountainaggeneys Area
Alternate or previous names Aggeneis Area, Swartberg
Related records 10073111

Geographic coordinates

Point of reference Claim
Geographic coordinates: 18.73078, -29.2299 (WGS84)
Elevation 1000
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country
South Africa

Comments on the location information

  • BLACK MOUNTAIN DEPOSIT LOCATED 11 KM SW OF TOWN OF AGGENEYS. NO INFORMATION AVAILABLE ON GEOLOGY, GEOMETRY, LITHOLOGY OR MINERALOGY OF BLACK MOUNTAIN, THEREFORE NOT CODED.

Commodities

Commodity Importance
Copper Primary
Lead Primary
Silver Primary
Zinc Critical Primary

Nearby scientific data

Claim (1) 18.73078, -29.2299
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1971

Mining district

District name Pofadder

Ownership information

  • Type Owner
    Owner Black Mountain Mineral Development Co. Ltd.(Bmmdc)
    Interest 100
    Home office South Africa
    Year 1979

Comments on the ownership information

  • BLACK MTN. MINERAL DEVELOPMENT CORP. IS HELD 49% BY PHELPS DODGE OF AFRICA LTD. (100% SUBSID. OF PHELPS DODGE OF THE U.S.), 49.98% BY GOLD FIELDS OF SOUTH AFRICA LTD. AND 1.02% BY VOGELSTRUISPRUITT METAL HOLDINGS WHICH IS A MEMBER OF THE GOLDFIELDS OF S.A. GROUP.

Comments on the production information

  • A PROSPECTING SHAFT WAS SUNK ON BLACK MOUNTAIN IN 1929 WHICH FAILED TO FIND OREBODY. PHELPS DODGE OF AFRICA LTD. BEGAN DRILLING PROGRAM IN 1970. COMPANY EXCERCISED OPTION TO PURCHASE 13,760 HECTARES IN AUG.1972.TOTAL OF 24,199 HECTARES OWNED BY BLACK MTN. MINERAL DEVEL.CO.LTD.BY 1977.
  • METALLURICAL RECOVERIES AND PRODUCTS ARE SAME AS EXPECTED RESULTS AT BROKEN HILL.

Reserves and resources

  • Type In-situ
    Estimate year 1974
    Indicated 48000000mt ore
    Demonstrated 48000000mt ore
    Total resources 48000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 2.8999 wt-pct Lead Major 1974
    Copper Cu 0.8 wt-pct Copper Major 1974
    Zinc Zn 0.6 wt-pct Zinc Major 1974
    Silver Ag 27.4 g/mt Silver Major 1974
  • Type In-situ
    Estimate year 1974
    Indicated 30000000mt ore
    Demonstrated 30000000mt ore
    Total resources 30000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 2.3 wt-pct Lead Major 1974
    Copper Cu 0.6 wt-pct Copper Major 1974
    Zinc Zn 0.5 wt-pct Zinc Major 1974
    Silver Ag 27.4 g/mt Silver Major 1974
  • Type In-situ
    Estimate year 1979
    Indicated 86000000mt ore
    Demonstrated 86000000mt ore
    Total resources 86000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 2.67 wt-pct Lead Major 1979
    Copper Cu 0.72 wt-pct Copper Major 1979
    Zinc Zn 0.56 wt-pct Zinc Major 1979
    Silver Ag 27.4 g/mt Silver Major 1979
  • Type In-situ
    Estimate year 1993
    Demonstrated 24800000mt ore
    Total resources 24800000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 6.8 wt-pct Lead Major 1993
    Zinc Zn 2.9 wt-pct Zinc Major 1993

Comments on the reserve resource information

  • AS OF JAN. 1974, 139 DRILLHOLES AT BLACK MTN. HAD LED TO ESTIMATES OF 30,000,000 MT ORE AT 0.6% CU, 2.3% PB, 0.5% ZN AND 0.8 OZ.AG/ST"AMENABLE TO OPEN-PITTING"; AND 48,000,000 MT OF ORE AT 0.8% CU, 2.9% PB, 0.6% ZN + 0.8 OZ.AG/ST "POSSIBLE RESERVES MINEABLE BY UNDERGROUND METHODS". NO CHANGE TO THESE RESERVE FIGURES IS AVAILABLE SINCE THEN AS MOST OF ATTENTION HAS BEEN GIVEN TO BROKEN HILL DEPOSIT. IT MAY BE THAT COMPANY WILL EVENTUALLY GROUP ALL RESERVES AS EITHER UG OR SURFACE DEPENDING UPON FUTURE STUDY.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 45
    Capacity 5714
    Capacity Units MT ORE/DAY
    Operating Days per Year 350
    Operating Shifts per Day 3
    Year of Information 1979
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method HORIZ CUT & FILL W/TAILINGS 10-60
    Number of Shafts 1
    Number of Inclines 1
    Capacity 3750
    Capacity Units MT ORE/DAY
    Unit Production Cost 11.5
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1979

Comments on the workings information

  • AMOUNT OF RAINFALL AND SEASON FOR MAXIMUM RAINFALL IS NOT KNOWN. AREA IS ARID. IT IS ASSUMED THAT WHEN BLACK MOUNTAIN DEPOSIT IS DEVELOPED THE WATER AND POWER SUPPLIES WILL ONLY REQUIRE A SHORT TIE-IN TO FACILITIES AT BROKEN HILL ABOUT 6 KM TO SE. ALSO ASSUMED THAT LITTLE OR NO ROAD WILL BE REQUIRED.

Reference information

Bibliographic references

  • Reserve-Resource

    AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUNE 1993,

  • Reserve-Resource

    P. 39, 49.

  • Deposit

    MINING MAGAZINE. PROGRESS CONTINUES AT AGGENEYS, MARCH 1979,

  • Deposit

    PP.206-213.

  • Deposit

    MINING MAGAZINE. JUNE 1977, P.432.

  • Deposit

    MINING MAGAZINE. APRIL,1974.

  • Deposit

    THE MINING RECORD, AUG.23,1972.

  • Deposit

    COAL GOLD AND BASE MINERALS OF SOUTHERN AFRICA, APRIL 1974,

  • Deposit

    PP.49-51.

  • Deposit

    MINING MAGAZINE, DEC. 1974, P.430.

  • Deposit

    MINING MAGAZINE, DEC. 1977, P.601.

  • Deposit

    MINING MAGAZINE, OCT. 1972, P.341.

  • Deposit

    WORLD MINING, SEPT. 1972.

  • Deposit

    MINING JOURNAL, MAR. 29,1974.

  • Deposit

    MINING MAGAZINE, JUNE 1975.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-AUG-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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