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

Rangala

Producer in Sri Lanka 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. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10183569
MAS/MILS ID 5420000007
Record type Site
Current site name Rangala

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 80.36421, 7.10918 (WGS84)
Elevation 120
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Sri Lanka(country)

Federal lands

Federal(land status)

Geographic areas

Country
Sri Lanka

Commodities

Commodity Importance
Graphite Critical Primary

Materials information

Materials Type of material
Calcite Unknown
Graphite Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) 80.36421, 7.10918
ListMap

Economic information

Ore body information

  • Length 60M
    Width 0.4M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Primary mode of Origin UNKNOWN
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. UNKNOWN
    Date of Last Modification 840702
  • Area 5HA
    Field Value
    Total Surface Area (HA) 5
    Date of Last Modification 910418

Comments on the geologic information

  • SRI LANKAN GRAPHITE DEPOSITS ARE UNIQUE IN THAT THEY CONSIST OF STEEPLY DIPPING VEINS OF REMARKABLY HIGH-GRADE GRAPHITE. GRADES VARY FROM 92 TO 95 PERCENT CARBON. COUNTRY ROCKS INCLUDE QUARTZITE, LIMESTONE, DOLOMITE, SCHIST, GRANULITE, GNEISS, AND CHARNOCKITE. THE NUMBER OF VEINS IN A DEPOSIT VARIES FROM 2 OR 3 UP TO OVER 100. THE GRAPHITE AT K-K, UNLIKE THE OTHER DEPOSITS, HAS A NEEDLE-LIKE HABIT. RANGALA HAS FOUR MAIN VEINS. VEIN LENGTHS VARY FROM 30 TO 90 METERS AND WIDTH FROM A FEW CM TO 0.75 METER.

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Non-metallic
Significant Yes
Mining method Open Stope
Year of first production 1974
Milling method Handsort

Mineral rights holdings

Type of mineral rights Federal Lease

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Sri Lanka State Mining And Minerals Devel. Corp. (Smmdc)
    Interest 100
    Home office Sri Lanka
    Year 1983

Production statistics

  • Year 1976
    Description Ore Tonnages Calculated From Product 182 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 182mt
  • Year 1977
    Description Tonnages Using 1.2:1 Ore:Product Ratio. 239 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 239mt
  • Year 1978
    Description 316 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 316mt
  • Year 1979
    Description 336 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 336mt
  • Year 1980
    Description 354 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 354mt
  • Year 1981
    Description 360 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 360mt

Comments on the production information

  • PRODUCTION EVIDENTLY BEGAN IN 1974, BUT PRODUCTION RECORDS PRIOR TO 1976 ARE NOT AVAILABLE.

Comments on the reserve resource information

  • M1C1=M9C4. GRADES SHOWN IN THE QA DATA SET ARE WEIGHT-PERCENT CARBON. MINE RECOVERY = 100%. DILUTION = 10%. RECOVERABLE DILUTED RESOURCE = 14,470 MT AT 86.3% CARBON.

Workings at the site

  • Type of workings Underground
    Length 650M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN STOPE
    Swell Factor .6
    Percent Recovery 100
    Hardness of Rock UNKNOWN
    Rock Characteristics UNKNOWN
    Rock Support Chars. UNKNOWN
    Mine Support Chars. UNKNOWN
    Avg. Length of Adits (m) 215
    Number of Adits 3
    1st Condition of Workings OPEN
    Capacity 1.3
    Capacity Units MT ORE/DAY
    Unit Production Cost 152.5
    Units of Production $/MT ORE
    Operating Days per Year 275
    Operating Shifts per Day 1
    Year of Information 1983

Comments on other economic factors

  • THE ONLY CAPITAL COSTS IDENTIFIED WERE FOR A COMPRESSOR AND SOME JACK LEG DRILLS, FOR EXPLORATION WORK, AND FOR A TRANSFORMER AND 7 KM OF POWER LINE. MINE EQUIPMENT REPLACEMENT IS INCLUDED IN THE MINE OP. COST. MILL EQUIPMENT REPLACEMENT IS INCLUDED IN THE MILL OP. COST. A ROYALTY OF $2.16/MT PRODUCT (AVG. 1982 $) IS PAID TO THE SRI LANKA GOVERNMENT.

Reference information

Bibliographic references

  • Deposit

    ANON MINING GRAPHITE IN SRI LANKA ;FROM SMMDC FILES

  • Deposit

    BASTIN THE GRAPHITE OF CEYLON ECONOMIC GEOLOGY VOL 7 #5

  • Deposit

    AUGUST 1912.

  • Deposit

    JAYATILEKE KOJ NATURAL GRAPHITE WITH SPECIAL REFERNCE TO

  • Deposit

    THE GEOLOGY MINING AND PROCESSING AT BAGALA MINES

  • Deposit

    SRI LANKA TECHNICAL PAPER PRESENTED IN YUGOSLAVIA

  • Deposit

    1979.

  • Deposit

    KENDALL HM ET AL INTRODUCTION TO PHYSICAL GEOGRAPHY SECOND

  • Deposit

    EDITION 1974.

  • Deposit

    SMMDC COMPANY PRODUCT BROCHURE NO DATE

  • Deposit

    IFS FINANCIAL TABLES

Reporter information

Type Date Name Affiliation Comment
Reporter 20-APR-95 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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