1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Western Area

Producer in Nimba, Liberia with commodity Iron
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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. Ownership information
  11. Reserves and resources
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10207848
MAS/MILS ID 7650400002
Record type Site
Current site name Western Area
Alternate or previous names Western Area Pp

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -8.65578, 7.44046 (WGS84)
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Nimba(province)

Liberia(country)

Geographic areas

Country State
Liberia Nimba

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Feldspar Unknown
Goethite Unknown
Hematite Unknown
Limonite Unknown
Magnetite Unknown
Mica Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) -8.65578, 7.44046
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Economic information

Ore body information

  • Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control FOLDING
    Date of Last Modification 860708

Comments on the geologic information

  • TOKADEH WAS MINED FROM 1973 TO 1977, WHEN IT WAS SHUTDOWN DUE TO THE ECONOMY. THE WESTERN AREA IS ASSUMED TO COME ON LINE WHEN THE NIMBA OPERATION IS MINED OUT. AT THIS TIME, TOKEDAH WILL BE MINED SEPARATELY FROM THE GANGRA AND YUELLITON OREBODIES.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Year of first production 1973

Ownership information

  • Type Owner-Operator
    Owner Lamco Joint Venture
    Interest 75
    Year 1982
  • Type Owner
    Owner Libeth
    Interest 25
    Year 1982

Comments on the production information

  • THE FINAL PRODUCT DISTRIBUTION IS AS FOLLOWS: UNITED STATES 25% AND EUROPE 75%.

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Measured 415000000mt ore
    Demonstrated 415000000mt ore
    Total resources 415000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 51.1 wt-pct Iron Major 1981

Comments on the reserve resource information

  • THE WESTERN AREAS CONSIST OF THREE OREBODIES, TOKADEH, GANGRA AND YUELLITON.
  • 1989 YEARBOOK-PETER KUCK
  • OWNERS: LIBERIAN AMERICAN-SWEDISH MINERALS CO(LAMCO) AND BETHLEHEM STEEL CORP. OPERATOR: LAMCO JV OPERATING CO. IN 1987, HIGH GRADE ORE FROM NIMBA PIT IS ALMOST EXHAUSTED 400 MILLION MT OF LOW GRADE ORE INCLUDE 225 MILLION MT FROM TOKADEH AT 47.9% FE. INCLUDES TAKADEH

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Percent Waste Rock 67
    Avg. Bench Height (meters) 10
    Capacity 36900
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.21
    Units of Production $/MT ORE
    Operating Days per Year 312
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • THE FEED GRADES FOR THE INDIVIDUAL OREBODIES ARE AS FOLLOWS: TOKADEH 47.9%, GANGRA 54.7% AND YUELLITON 54.2%. THE PLANT CAPACITY AT TOKADEH WILL BE 12 MILLION METRIC TONS PER YEAR. THE PLANT CAPACITY AT BUCHANAN IS 8 MILLION METRIC TONS PER YEAR. BUCHANAN WILL PROCESS THE GANGRA AND YUELLITON ORES.
  • THE COST AND CAPACITY INFORMATION IS ESTIMATED FOR THE YEAR 1992, WHEN THIS PROPERTY IS EXPECTED TO BE IN FULL PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    WHITE, L., REBOUNDING LAMCO NOW SEEKS A LONG TERM FUTURE,

  • Deposit

    E&MJ, OCTOBER, 1985, VOL. 186, NO. 10, PP 25-30.

  • Deposit

    SUBAH, PEWU, IRON ORE IN LIBERIA: PAST PRODUCTION AND FUTURE

  • Deposit

    PROSPECTS, MINING MAGAZINE, SEPTEMBER, 1981, PP 204-208.

  • Deposit

    LINDBERG, T., EXPERIENCE WITH THE JONES' SEPARATOR AT

  • Deposit

    BUCHANAN, MINING MAGAZINE, SEPTEMBER, 1979, PP 199-207.

General comments

Subject category Comment text
Deposit THE ORE BODY DIMENSIONS OF TOKADEH ARE LENGTH 1200 M, WIDTH 300 M AND DEPTH 50 M. THE DIMENSIONS FOR GANGRA AND YUELLITON OREBODIES ARE LENGTH 1000 M, WIDTH 250 M AND DEPTH 50 M. THE IRON FORMATIONS WERE INITIALLY DEPOSITED AS PRECAM- BRIAN SEDIMENTS. SUBSEQUENT UPLIFT, FOLDING AND META- MORPHISM TRANSFORMED THE SEDIMENTS TO IRON-BEARING QUART- ZITES AND SCHISTS, WHICH FORM MOST OF THE MOUNTAIN RANGES IN THE AREA. LOCALLY, LEACHING OF SILICA FROM THE ORE RESULTED IN HIGH GRADE DEPOSITS.

Reporter information

Type Date Name Affiliation Comment
Reporter 11-OCT-96 Bolis 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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