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Trojan Mine

Producer in Zimbabwe with commodities Cobalt, Copper, Nickel
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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. Land status
  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 10232204
MAS/MILS ID 7960100011
Record type Site
Current site name Trojan Mine

Geographic coordinates

Point of reference Town
Geographic coordinates: 31.33132, -17.32706 (WGS84)
Elevation 1530
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Zimbabwe(country)

Africa(continent)

Land(continent)

Geographic areas

Country
Zimbabwe

Commodities

Commodity Importance
Cobalt Critical Secondary
Copper Secondary
Nickel Critical Primary

Materials information

Materials Type of material
Chalcopyrite Unknown
Ilmenite Unknown
Magnetite Unknown
Millerite Unknown
Pentlandite Unknown
Pyrrhotite Unknown

Nearby scientific data

Town (1) 31.33132, -17.32706
ListMap

Economic information

Ore body information

  • Length 274M
    Width 35M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 FISSURE VEIN
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control UNKNOWN
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Avg. Thick. Unconsol. Mat. 30
    Date of Last Modification 830712

Comments on the geologic information

  • DIP IS APPROX 84 DEGREES NORTH. T STRATA ON THE TROJAN CLAIMS ARE ISOCLINALLY FOLDED AND OVERTURNED TO THE SOUTH AS INDICATED BY THE PERSISTENT STEEP NORTHERLY DIP OF APPROXIMATELY 75 DEG. THE FOLD OF THE AXES PLUNG AT LOW ANGLES. THE DEPOSIT CONSISTS OF THE HANGING WALL, MAIN, AND FOOTWALL OREBODIES.

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1957
Year of first production 1968
Milling method Flotation

Mining district

District name Bindura

Land status

Ownership category Unknown

Ownership information

  • Type Operator
    Owner Bindura Nickel Corp. Ltd. (Bnc)
    Home office Zimbabwe
    Year 1991
  • Type Owner
    Owner Anglo American Corp. Of South Africa, Ltd.
    Interest 100
    Home office South Africa
    Year 1991

Comments on the production information

  • PRODUCTION WAS STOPPED IN 1993 TO REBUILD THE SMELTER. THE SMELTER REOPEN IN 1994.

Reserves and resources

  • Type In-situ
    Estimate year 1993
    Indicated 11630000mt ore
    Demonstrated 11630000mt ore
    Total resources 11630000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.75 wt-pct Nickel Major 1993
  • Type In-situ
    Estimate year 1972
    Measured 5000000mt ore
    Indicated 7700000mt ore
    Demonstrated 12700000mt ore
    Total resources 12700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 1.3999 wt-pct Nickel Major 1972
  • Type In-situ
    Estimate year 1987
    Measured 11800000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.67 wt-pct Nickel Major 1987
    Copper Cu 0.04 wt-pct Copper Minor 1987
  • Type In-situ
    Estimate year 1993
    Demonstrated 11630000mt ore
    Total resources 11630000mt ore
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.7 wt-pct Nickel Major 1993

Comments on the reserve resource information

  • ZIMBABWE CHAMBER OF MINES JOURNAL, JAN, 1987, PP.21-37. PROBLEMS ASSOCIATED WITH THE PROCESSING OF NICKEL ORES IN ZIMBABWE, MASHARA AND STOREY.

Workings at the site

  • Type of workings Underground
    Overall depth 550M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SUBLEVEL 10-43
    Percent Waste Rock 10
    Percent Recovery 90
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING MAY SLOUGH
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 3
    Avg. Length of Adits (m) 380
    1st Condition of Workings OPEN
    Capacity 3300
    Capacity Units MT ORE/DAY
    Unit Production Cost 23.62
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 3
    Year of Information 1981

Comments on other economic factors

  • SOURCE LISTS THAT TROJAN MINE IS SCHEDULED TO CLOSE BY 1998.

Reference information

Bibliographic references

  • Production

    MINING WEEKLY, JULY 2, 1993, P-8.

  • Reserve-Resource

    AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUNE, 1993,

  • Reserve-Resource

    P. 40.

  • Reserve-Resource

    AME MINERAL ECONOMICS, 1993, P-40.

  • Deposit

    MINING ANNUAL REVIEW 1967 P 233

  • Deposit

    MINING ANNUAL REVIEW 1965 P 187

  • Deposit

    MINING ANNUAL REVIEW 1971 P 340

  • Deposit

    MINING ANNUAL REVIEW 1972 P 340

  • Deposit

    MINING ANNUAL REVIEW 1970 P 333

  • Deposit

    MINING JOURNAL 1972 P 120,337,417

  • Deposit

    MINING MAGAZINE 1972 P 81

  • Deposit

    1975-76 E/MJ INT. DIRECTORY,P.264

  • Deposit

    LE ROEX 1964 NICKEL DEPOSIT ON THE TROJAN CLAIMS BINDURA DIS

  • Deposit

    METALS SOURCEBOOK 7/30/73 ITEM (A3617)

General comments

Subject category Comment text
Deposit ANGLO-AMERIICAN CORP. GROUP HOLDS AN EQUITY INTEREST OF 31.86 PERCENT IN BINDURA NI CORP. LTD. PENTLANDITE IS THE PRINCIPAL NICKEL-BEARING MINERAL. ALL OF THE OREBODIES ARE BEING MINED SIMULTANEOUSLY BY A SUBLEVEL LONGHOLE DRILLING AND STOPING METHOD. THE MINE IS SERVED BY A VERTICLE SHAFT FROM SURFACE TO LEVEL 10. A TWIN SUB-VERTICAL SHAFT IS BEING SUNK TO EXPLOIT DEEPER POINT PF THE OREBODY (550 METERS IN THE SUB-LEVEL DRILL DRIVES, 24 HOLE RINGS ARE DRILLED AT 1 METER BURDENS IN A 180 DEGREE ARE ABOVE THE HORIZONTAL. IN ORDER TO MAINTAIN STOPING RATE, ABOUT 550 METERS OF DEV- ELOPEMENT WORKS ARE REQUIRED EACH MONTH. AMMONIA IS USED FOR PH ADJUSTMENT TO +/- 9.3 WHICH IS OPTI- NUM FOR PENTLANDITE RESPONSE.COPPER,SULFATE,XANTHATE,AERO- FLOAT PROMOTES, FROTHER AND CARBON METHYL CELLULOSE ARE USED FOR MINERAL ACTIVATION AND COLLECTION AS WELL AS TALC DEPRESSION. THE BINDURA SMELTER AND REFINERY PROCESS CONCENTRATES THAT ARE PRODUCED BY FOUR MINES: TROJAN, EPOCH, MIOZIWA, ANS SHANGANI. COBALT, WHICH IS CONTAINED IN THE LEACH ALLOY, HAS TO BE RE- MOVED IN ORDER TO FACILITATE THE PRODUCTION OF THE RE- QUIRED HIGH GRADE NICKEL. THE COBALT IS SOLD AS A SLUDGE

Reporter information

Type Date Name Affiliation Comment
Reporter 21-APR-1995 Bleiwas, Donald 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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