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Antsirakambo

Producer in Toamasina, Madagascar with commodity Graphite
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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. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10256272
MAS/MILS ID 7880100003
Record type Site
Current site name Antsirakambo

Geographic coordinates

Point of reference Claim
Geographic coordinates: 49.15105, -18.48017 (WGS84)
Elevation 500
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Toamasina(province)

Madagascar(country)

Africa(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Madagascar Toamasina

Commodities

Commodity Importance
Graphite Critical Primary

Materials information

Materials Type of material
Graphite Unknown

Nearby scientific data

Claim (1) 49.15105, -18.48017
ListMap

Economic information

Ore body information

  • Strike N10W
    Dip 30W
    Thickness 20M
    Depth to top 5M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 LATERITE
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. UNKNOWN
    Strike And Dip N10W:30W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 5
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 840703
  • Area 2000HA
    Field Value
    Total Surface Area (HA) 2000
    Date of Last Modification 910418

Comments on the geologic information

  • ALL 8 OF THE MADAGASCAR GRAPHITE PROPERTIES STUDIED UNDER THE 1981-83 ZELLARS-WILLIAMS CONTRACT FALL WITHIN THE GEOGRAPHICALLY-DEFINED MANAMPOTSY GROUP OF DEPOSITS. THESE DEPOSITS ARE CHARACTERIZED BY OCCURRENCES OF GNEISS AND MIGMATITE WITHIN AMPHIBOLITE FACIES WHERE INTENSE WEATHERING HAS LATERIZED THE ROCKS PRODUCING UP TO 30 METERS OF RED CLAY IN WHICH THE GRAPHITE OCCURS AS DISSEMINATED, HIGH-QUALITY, CRYSTALLINE FLAKES. THESE CLAYS CONTAIN FROM 5 TO 15 PERCENT CARBON.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant Yes
Mining method Strip-Hillside
Milling method Flotation

Mining district

District name Manampotsy

Mineral rights holdings

Type of mineral rights Federal Lease

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Etablissement Gallois
    Interest 100
    Home office Malagasy Rep.
    Year 1983

Production statistics

  • Year 1967
    Description Ore Tonnages Were Calculated From 90800 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 90800mt
  • Year 1968
    Description Product Tonnages Supplied By Madagascar 94500 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 94500mt
  • Year 1969
    Description Ministere De L'Industrie Et Du Commerce. 102500 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 102500mt
  • Year 1970
    Description 106900 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 106900mt
  • Year 1971
    Description 111700 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 111700mt
  • Year 1972
    Description 89300 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 89300mt
  • Year 1973
    Description 59500 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 59500mt
  • Year 1974
    Description 71600 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 71600mt
  • Year 1975
    Description 79700 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 79700mt
  • Year 1976
    Description 86100 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 86100mt
  • Year 1977
    Description 90300 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 90300mt
  • Year 1978
    Description 98300 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 98300mt
  • Year 1979
    Description 93200 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 93200mt
  • Year 1980
    Description 80400 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 80400mt
  • Year 1981
    Description 101000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 101000mt
  • Year 1982
    Description 85300 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 85300mt

Comments on the production information

  • THE PRODUCTS FROM 7 OF THE 8 GRAPHITE MINES IN MADAGASCAR ARE IDENTICAL. MAROVINTSY, SAHANAVO, SAHAMAMY, FALIARANO, AMBATOMITAMBA, ANTSIRAKAMBO, AND TSARAVONIANY ALL PRODUCE PRODUCTS WITH THE FOLLOWING CHARACTERISTICS: PRODUCT SIZE PERCENT NAME DISTRIBUTION CARBON ----------------------------------------------- LARGE 75% +40 MESH 85 FLAKE 22% -40+60 MESH 3% -60 MESH MEDIUM 25% +40 MESH 85 FLAKE 72% -40+80 MESH 3% -80 MESH FINE 25% +40 MESH 85 FLAKE 50% -40+60 MESH 20% -60+80 MESH 5% -80 MESH EXTRA PASSES 80 MESH 85 FINE (POWDER) ------------------------------------------------- THE PROPORTIONS OF EACH PRODUCT PRODUCED AT EACH MINE ARE SUMMARIZED BELOW: MINE LARGE MEDIUM FINE EXTRA NAME FLAKE FLAKE FLAKE FINE ------------------------------------------------------------ MAROVINTSY 8.5% 21.3% 39.7% 30.5% SAHANAVO 10% 70% ON REQUEST 20% SAHAMAMY 50% LARGE + MEDIUM 43% 7% FALIARANO 10% 40% 40% 10% AMBATOMITAMBA 10% 70% ON REQUEST 20% ANTSIRAKAMBO 20% 50% 20% 10% TSARAAVONIANY 10% 40% 40% 10% ------------------------------------------------------------ THE ANDASIFAHATELO PROPERTY PRODUCES ONLY ONE PRODUCT, A MEDIUM FLAKE HAVING THE SAME SIZE CHARACTERISTICS AS THE MEDIUM FLAKE DESCRIBED IN THE ABOVE TABLES, BUT HAVING A CARBON GRADE OF 92 PERCENT. THE ANTSIRAKAMBO OPERATION ACTUALLY PRODUCES THE PRODUCTS SHOWN IN THE TABLE ABOVE. FOR DATABASE SIMPLICITY, ONLY ONE P DATA SET WAS USED (PA). FOR PURPOSES OF THE ECONOMIC TIME DIAGRAM, THE LARGE, MEDIUM, AND FINE FLAKE PRODUCTS WERE COMBINED AS GRAPHITE A, WITH A 54% MILL RECOVERY. THE EXTRA FINE FLAKE IS GRAPHITE B, WITH A 6% MILL RECOVERY. OVERALL MILL RECOVERY IS 60%.

Comments on the reserve resource information

  • RESERVE CALCULATIONS BASED ON GRAPHITE SECTION FROM GITES DE MINERAUX DE MADAGASCAR,V.1 AND 2, 1966. RES. UPDATED TO DEC 1988
  • M1C1=M9C4. MINE RECOVERY = 95%. DILUTION = 0%. RECOVERABLE RESOURCE IS 2,512,800 MT. NO DATA AVAILABLE ON INFERRED RESOURCES. GRADE GIVEN IS WEIGHT-PERCENT CARBON.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .6
    Avg. Overburden Thickness 5
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore SAND, SILT
    Max. Pit Slope (degrees) 45
    Capacity 373
    Capacity Units MT ORE/DAY
    Unit Production Cost 7.19
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1983

Reference information

Bibliographic references

  • Deposit

    BESAIRIE, H. GITES DE MINERAUX DE MADAGASCAR, BUR. DE

  • Deposit

    RECHERCHE GEOLOGIE ET MINIERE, V. 1, 1966, TANANARIVE,

  • Deposit

    PP. 187-216.

  • Deposit

    MURDOCK, T.G., MINERAL RESOURCES OF THE MALAGASY REPUBLIC,

  • Deposit

    BUMINES IC 8196, DEPT. OF INT., WASH., D.C., 1963,

  • Deposit

    PP. 112-121.

  • Deposit

    BESAIRIE, H., GITES DE MINERAUX DE MADAGASCAR, BUR. DE

  • Deposit

    RECHERCHE GEOLOGIE ET MINIERE, V. 2, 1966, TANANARIVE,

  • Deposit

    MAPS 43-52.

General comments

Subject category Comment text
Deposit THE DATA IN THIS DATA BASE ENTRY WERE GATHERED UNDER BUREAU OF MINES CONTRACT J0225019, "THE DEVELOPMENT OF ENGINEERING AND COST DATA FOR FOREIGN GRAPHITE PROPERTIES"; THE CONTRACT WAS AWARDED TO ZELLARS-WILLIAMS, INC. IN SEPTEMBER 1982. ALL GRAPHITE MINES IN MADAGASCAR USE THE SAME MINING METHOD. SMALL OPEN PITS (GENERALLY 1 TO 5 IN NUMBER) ARE MINED BY FRONT-END LOADER OR BULLDOZER WITHOUT BLASTING. THE OVERBURDEN IS EITHER HAULED AWAY BY TRUCK OR, IF IT IS VERY THIN, IS WASHED WITH THE ORE. THE ORE IS EITHER TRUCKED TO A FIELD WASHER OR IS WASHED INTO A SLUICE BY A WATER GUN FOR GRAVITY FLOW TO THE FIELD WASHER. WATER GUNS ARE FED BY WATER PUMPED FROM A NEARBY RIVER. MILLING IS A TWO-STAGE PROCESS CARRIED OUT AT A "POSTES DE DEBOURBAGE" (FIELD WASHER) AND THEN AT A "RAFFINAGE" (REFINERY). AT THE FIELD WASHER, THE ORE IS FIRST SLURRIED USING A WATER GUN IF NOT ALREADY IN SLURRY FORM. A GRIZZLY IS THEN USED TO REMOVE STONES THAT ARE +5 MM IN SIZE. OCCASIONALLY THE ORE IS ALSO DESLIMED BY SCREEN- ING AT ABOUT 50 MESH. DIESEL FUEL OIL AND ALCOHOL-BASED FROTHERS ARE THEN ADDED PRIOR TO ROUGHER FLOTATION. THE ROUGHER CONCENTRATES VARY FROM 62 TO 67 PERCENT CARBON. TAILS ARE DISCHARGED BY GRAVITY INTO THE NEARBY RIVER. THE ROUGHER CONCENTRATE FLOWS BY GRAVITY TO THE REFINERY WHERE IT IS GROUND IN A BALL MILL, FLOATED, AND DRIED IN A ROTARY DRYER. THE DRIED CLEANER CONCENTRATE IS SIZED USING VIBRATING SCREENS AND BAGGED. ROD MILLS ARE USED AT SOME OPERATIONS INSTEAD OF BALL MILLS. THE PRODUCTION RATE CHANGES IN 1983 FROM 87.9% OF CAPACITY TO FULL CAPACITY. THEREFORE, ALL CAPACITIES AND OP. COSTS SHOWN IN THE S, K, AND P DATA SETS ARE AT FULL CAPACITY, NOT AT THE 1982 PRODUCTION LEVEL.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-MAY-86 Z&W Inc 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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