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

Ragedera

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 10207045
MAS/MILS ID 5420000008
Record type Site
Current site name Ragedera

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 80.53751, 7.63552 (WGS84)
Elevation 355
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) 80.53751, 7.63552
ListMap

Economic information

Ore body information

  • Length 25M
    Width 0.1M
    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 851030
  • Area 2HA
    Field Value
    Total Surface Area (HA) 2
    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. AREA OF MINERALIZATION = 0.2 HECTARES. THERE ARE ABOUT 12 VEINS VARYING IN WIDTH FROM A FEW MILLIMETERS TO 0.25 METER. AVERAGE KNOWN VEIN LENGTH IS ABOUT 25 METERS.

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 1977
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 1977
    Description Ore Tonnages Calculated From Product 64 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 64mt
  • Year 1978
    Description Tonnages Using 1.2:1 Ore:Product Ratio. 108 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 108mt
  • Year 1979
    Description 162 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 162mt
  • Year 1980
    Description 272 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 272mt

Comments on the reserve resource information

  • M1C1=M9C4. GRADES SHOWN IN THE QA DATA SET ARE WEIGHT-PERCENT CARBON. MINE RECOVERY = 100%. DILUTION = 10%. DILUTED, RECOVERABLE RESOURCE = 2,288 MT AT 83.6% CARBON.

Workings at the site

  • Type of workings Underground
    Length 240M
    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) 128
    Number of Adits 1
    1st Condition of Workings OPEN
    Capacity .9
    Capacity Units MT ORE/DAY
    Unit Production Cost 135
    Units of Production $/MT ORE
    Operating Days per Year 275
    Operating Shifts per Day 1
    Year of Information 1983

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 REFERENCE TO

  • Deposit

    THE GEOLOGY OF 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 FINANNCIAL TABLES

Reporter information

Type Date Name Affiliation Comment
Reporter 27-MAY-1986 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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