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

Moyamba

Producer in Sierra Leone with commodity Aluminum
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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. Land status
  13. Ownership information
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10231976
MAS/MILS ID 7470150002
Record type Site
Current site name Moyamba
Alternate or previous names Mokanji Mekanji, Mokanji Mtn. Mekanji, Mokanji Hills Mekanji Hills, Mayamba Hills

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -12.1653, 7.91774 (WGS84)
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Sierra Leone(country)

Geographic areas

Country
Sierra Leone

Commodities

Commodity Importance
Aluminum Critical Primary

Materials information

Materials Type of material
Gibbsite Unknown

Nearby scientific data

Ore Body (1) -12.1653, 7.91774
ListMap

Economic information

Ore body information

  • Strike S25E
    Dip 90N
    Thickness 9M
    Length 3000M
    Width 350M
    Depth to top 0M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 LATERITE
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 MANTLELIKE
    Primary mode of Origin OXIDATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. NONE
    Strike And Dip S25E:90N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 900710

Comments on the geologic information

  • THE KASILA GROUP OR SERIES IS ASLO KNOWN AS THE MARAMPA GROUP OR SERIES.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1960
Year of first production 1963
Milling method Washing

Mining district

District name Mokanji Hills

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Sierra Leone Government
    Interest 100
    Home office Sierra Leone
    Year 1987
  • Type Operator
    Owner Sierra Leone Ore And Metal Co. (Sieromco)
    Home office Sierra Leone
    Year 1987

Comments on the ownership information

  • SIERONCO IS A SUBSIDIAARY OF SUISSE ALUMINIUM LIMITED; (ALUSUISSE).

Production statistics

  • Year 1970
    Description Bauxite Ore Production/1970 449000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 449000mt
  • Year 1971
    Description Bauxite Ore/1971 590500 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 590500mt
  • Year 1972
    Description Bauxite Ore/1972 693900 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 693900mt
  • Year 1973
    Description Bauxite Ore/1973 693000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 693000mt
  • Year 1974
    Description Bauxite Ore/1974 672000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 672000mt
  • Year 1975
    Description Bauxite Ore/1975 716000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 716000mt
  • Year 1976
    Description Bauxite Ore/1976 660000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 660000mt
  • Year 1977
    Description Bauxite Ore /1977 745000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 745000mt
  • Year 1978
    Description Bauxite Ore /1978 716000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 716000mt
  • Year 1979
    Description Bauxite Ore/1979 672000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 672000mt
  • Year 1980
    Description Bauxite Ore/1980 766000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 766000mt
  • Year 1981
    Description Bauxite Ore/1981 610000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 610000mt
  • Year 1982
    Description Bauxite Ore/1982 631000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 631000mt
  • Year 1983
    Description Bauxite Ore/1983 785000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 785000mt
  • Year 1984
    Description Bauxite Ore/1984 1041200 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 1041200mt
  • Year 1985
    Description Bauxite Ore/1985 1184500 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 1184500mt
  • Year 1986
    Description Bauxite Ore/1986 1242200 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 1242200mt
  • Year 1987
    Description Bauxite Ore 1391000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Aluminum Aluminum 1391000mt

Reserves and resources

  • Type In-situ
    Estimate year 1981
    Indicated 30000000mt ore
    Demonstrated 30000000mt ore
    Total resources 30000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 55 wt-pct Aluminum Major 1981
  • Type In-situ
    Estimate year 1981
    Indicated 30000000mt ore
    Demonstrated 30000000mt ore
    Total resources 30000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 49 wt-pct Aluminum Major 1981
  • Type In-situ
    Estimate year 1981
    Indicated 48500000mt ore
    Demonstrated 48500000mt ore
    Total resources 48500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 55 wt-pct Aluminum Major 1981
  • Type In-situ
    Estimate year 1981
    Indicated 63500000mt ore
    Demonstrated 63500000mt ore
    Total resources 63500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 47 wt-pct Aluminum Major 1981

Comments on the reserve resource information

  • BAUXITE BELT 140 M WIDE, NOT MORE THAN 45M THICK(VARIABLE) AND STRIKE LENGTH OF 30 KM. OPERATOR: SIERRA LEONE ORE & METALS CO. OTHER NAMES: MOKANJI, MOKANJI MTN.
  • M1C1=M9C4;: QM1COL3=QM9COL6; GOLDERS RESERVES/RESOURCES ARE BASED ON THE 1979 BOM MINERALS YEARBOOK. RESERVES/RESOURCES FOR THE 1987 UPDATE STUDY ARE ALSO BASED ON THE 1976 BOM MINERALS YEARBOOK DATA, MINUS PRODUCTION FROM 1976 TO 1986.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Capacity 4637
    Capacity Units MT ORE/DAY
    Operating Days per Year 300
    Operating Shifts per Day 3
    Year of Information 1987

Comments on other economic factors

  • ORE IS CRUSHED AND SCREENED AT THE MOYAMBA ORE PROCESSING PLANT, TRANSPORTED TO THE WASH PLANT AND THEN SENT TO REFINERY IN W. GERMANY, ITALY AND CANADA. 22.5 KM TRUCK HAUL TO METTI 75 KM FLAT BOAT TO SHERBRO

Reference information

Bibliographic references

  • Reserve-Resource

    MINERALS YEARBOOK, 1976, P.920.

  • Reserve-Resource

    MINERALS YEARBOOK, 1978-79, VOL.III, AREA REPORTS:INTERNAT-

  • Reserve-Resource

    IONAL. US DEPT OF THE INTERIOR. P.820.

  • Reserve-Resource

    NON FERROUS METALS, UNITED NATIONS, NEW YORK, 1972.

  • Reserve-Resource

    ECONOMIC STRUCTRURS AND DEVELOPMENT PROBLEMS, APRIL 1975,

  • Reserve-Resource

    VIII/449/75-E,PP 31-32.

  • Reserve-Resource

    THE GEOLOGY AND MINERALS OF SIERRA LEONE, S.W. MOREL,

  • Reserve-Resource

    UNIVERSITY OF SIERRA LEONE, FREETOWN, APRIL 1976, P9.

  • Deposit

    ALUMINUM CONDUCTOR DEVELOPMENT CORP.1973.SURVEY OF PLANED

  • Deposit

    INCREASES IN WORLD BAUXITE,ALUMINA AND ALUMINUM CAPACITIES

  • Deposit

    1979.LONDON,ENGLAND.1974.P.61.

  • Deposit

    PATTERSON,S.G.,1964,WORLD BAUXITE RESERVES AND ALUMINUM RESO

  • Deposit

    U.S.G.S. BULL.1228. PP.88.89.

  • Deposit

    INTERATIONAL MINING, AUGUST 1987,P90.

  • Deposit

    MINERAL RESOURCES OF AFRICA, NICOLAS DE KUN, COLUMBIA

  • Deposit

    UNIVERSITY , 1965, P84.

  • Deposit

    GOLDER, MOYAMBA DEPOSIT PROFILE REPORT.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-SEP-96 Wilburn, David R. 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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