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

Marampa

Past Producer in Sierra Leone 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. Reporter information

Geologic information

Identification information

Deposit ID 10304560
MAS/MILS ID 7470100001
Record type Site
Current site name Marampa

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -13.2986, 8.70099 (WGS84)

Site location context

Political divisions (FIPS codes)

Sierra Leone(country)

Geographic areas

Country
Sierra Leone

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Feldspar Unknown
Hematite Unknown
Mica Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) -13.2986, 8.70099
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Economic information

Ore body information

  • Thickness 100M
    Length 1300M
    Width 160M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Primary mode of Origin SEDIMENTATION
    Date of Last Modification 860708

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1933

Ownership information

  • Type Operator
    Owner Astromineral Of Vienna
    Year 1982
  • Type Owner
    Owner Sierra Leone - Government
    Interest 100
    Year 1982

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Measured 58000000mt ore
    Demonstrated 58000000mt ore
    Total resources 58000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 32.4 wt-pct Iron Major 1982

Comments on the reserve resource information

  • RESERVES ARE ESTIMATED TO CONTAIN 50 MILLION METRIC TONS OF 28.6% FE TAILINGS AND 18 MILLION METRIC TONS OF 38% FE ITABIRITE.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Percent Waste Rock 0
    Capacity 2900
    Capacity Units MT ORE/DAY
    Unit Production Cost 1.28
    Units of Production $/MT ORE
    Operating Days per Year 312
    Year of Information 1982
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Mining Method DREDGING
    Capacity 4300
    Capacity Units MT ORE/DAY
    Unit Production Cost 1.28
    Units of Production $/MT ORE
    Operating Days per Year 312
    Year of Information 1982

Comments on other economic factors

  • MARAMPA IS CURRENTLY LISTED AS A PAST PRODUCING OPERATION. THE MINE WAS SHUTDOWN IN 1975 DUE TO ADVERSE MARKET CONDITIONS AND PRODUCTION PROBLEMS. IT IS SLATED TO REOPEN IN 1983, AT WHICH TIME THE OPERATION WILL MINE BY OPEN PIT METHODS AND DREDGE OLD MINE TAILINGS. IT IS ESTIMATED THAT .9 MILLION METRIC TONS OF PRIMARY ORE ,ITABIRITE, WILL BE MINED AND 1.35 MILLION METRIC TONS OF SECONDARY ORE, TAILINGS, WILL BE DREDGED PER YEAR.

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE, SIERRA LEONE IRON ORE PRODUCTION RE-

  • Deposit

    ACTIVATED, JANUARY, 1983, PP 7-9.

Reporter information

Type Date Name Affiliation Comment
Reporter 17-JUL-1986 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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