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Ambatomitamba

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. Ownership information
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10207492
MRDS ID ISM0082
MAS/MILS ID 7880100005
Record type Site
Current site name Ambatomitamba
Related records 60000535

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 48.98435, -18.34688 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Toamasina(province)

Madagascar(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
Madagascar Toamasina

Commodities

Commodity Importance
Graphite Critical Primary

Materials information

Materials Type of material
Amphibole Unknown
Graphite Unknown

Nearby scientific data

Ore Body (1) 48.98435, -18.34688
ListMap

Economic information

Ore body information

  • Depth to top 5M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 LATERITE
    Shape of Orebody #1 MANTLELIKE
    Type of Orebody #2 STRATIFORM
    Primary mode of Origin RESIDUAL CONCENT
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Avg. Thick. Unconsol. Mat. 5
    Date of Last Modification 850910
  • Area 25000HA
    Field Value
    Total Surface Area (HA) 25000
    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 DIS- SEMINATED, HIGH-QUALITY, CRYSTALLINE FLAKES. THESE CLAYS CONTAIN FROM 5 TO 15 PERCENT CARBON. OREBODY DIMENSIONS ARE NOT KNOWN. COVER THICKNESS IS ESTIMATED.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1907
Mining method Strip-Hillside
Year of first production 1957
Milling method Flotation

Mining district

District name Manampotsy

Ownership information

  • Type Owner-Operator
    Owner Societe Miniere De La Grand Ile
    Interest 100
    Home office Malagasy Rep.
    Year 1983

Comments on the ownership information

  • SMGI HOLDS THE MINERAL RIGHTS UNDER LEASE FROM SOCIETE LYONNAISE AGRICOLE, MINIERE ET INDUSTRIELLE.

Production statistics

  • Year 1979
    Description Production Tonnages Of Ore Were Calcu- 56900 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 56900mt
  • Year 1980
    Description Lated From Product Tonnages Supplied By 64800 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 64800mt
  • Year 1981
    Description J.P. Bordier, Gen'L. Manager, Smgi. 88400 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 88400mt
  • Year 1982
    Description 97800 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 97800mt

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 K1 AND K2 MILLS WILL PRODUCE EXACTLY THE SAME PRODUCTS IN THE SAME QUANTITIES. AMBATOMITAMBA WILL PRODUCE THE PRODUCT SHOWN IN THE ABOVE TABLES THROUGH MINE LIFE. FOR PURPOSES OF ECONOMIC ANALYSIS, HOWEVER, THE LARGE AND MEDIUM FLAKE PRODUCTS HAVE BEEN COMBINED AS GRAPHITE A WITH A RECOVERY OF 48% AND A GRADE OF 85% C. GRAPHITE B IS POWDER WITH A RECOVERY OF 12% AND A GRADE OF 85% C. FOR THE SAKE OF DATA BASE SIMPLICITY, EACH MILL (K1 AND K2) IS SHOWN AS PRODUCING ONLY 1 PRODUCT (PA), BUT IN REALITY, THREE PRODUCTS ARE ACTUALLY PRODUCED THROUGHOUT MINE LIFE (LARGE FLAKE, MEDIUM FLAKE, AND POWDER).

Comments on the reserve resource information

  • M1C1=M9C4. M2C1=M9C5. MINE RECOVERY = 95%. DILUTION = 0%. NO INFERRED RESOURCES. M1C1 OREBODY HAS 2,121,800 MT RECOVERABLE. M2C1 OREBODY HAS 1,090,000 MT RECOVERABLE. ALL GRADES ARE WEIGHT- PERCENT CARBON.
  • RESERVE CALCULATIONS BASED ON GRAPHITE SECTION FROM GITES DE MINERAUX DE MADAGASCAR, V.1 AND 2, 1966. RES.UPDATED TO DEC.1988

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
    Capacity 389
    Capacity Units MT ORE/DAY
    Unit Production Cost 6.77
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1983
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    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
    Capacity 389
    Capacity Units MT ORE/DAY
    Unit Production Cost 7.74
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1983

Comments on other economic factors

  • MINE-TO-MILL TRANSPORTATION DISTANCES ARE NOT KNOWN, BUT ARE SHORT, PROBABLY LESS THAN 1 KM. TRANSPORTATION COSTS ARE INCLUDED IN THE MINE OP. COST.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    REPUBLIC, US BU MINES, IC 8196, 1963, P.119-120.

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 SCREENING 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. IT SHOULD BE NOTED THAT AMBATOMITAMBA WILL MINE ITS FIRST OREBODY (AT 7% C) FROM 1982 THROUGH 2002. THE SECOND OREBODY (AT 13% C) WILL BE MINED FROM 2003 THROUGH 2022. PRODUCTS FROM BOTH OREBODIES WILL BE THE SAME AND THE ANNUAL PRODUCT TONNAGE FROM BOTH OREBODIES WILL TOTAL 5000 MTPY. NO CAPITAL EXPENDITURES ARE REQUIRED FOR MINING OR MILLING THE SECOND OREBODY. DURING MINING OF THE SECOND OREBODY, BOTH MINE AND MILL WILL BE OPERATING AT 53.9% OF CAPACITY.

Reporter information

Type Date Name Affiliation Comment
Reporter 26-MAY-1995 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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