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

Kahatagaha-Kolongaha Mines

Producer in Sri Lanka with commodity Graphite
Map
XML
JSON
KML
B
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 10206769
MAS/MILS ID 5420000003
Record type Site
Current site name Kahatagaha-Kolongaha Mines
Alternate or previous names Kahatagaha-Kolongaha K-K

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 80.46701, 7.71752 (WGS84)
Elevation 220
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) 80.46701, 7.71752
ListMap

Economic information

Ore body information

  • Length 60M
    Width 0.2M
    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 40HA
    Field Value
    Total Surface Area (HA) 40
    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. DOWN-DIP VEIN EXTENT VARIES FROM VEIN TO VEIN. THERE ARE 32 VEINS BEING EXPLOITED.

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1675
Year of first production 1872
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 1967
    Accuracy Estimate
    Description 1967-1975 Tonnages Are Estimated. Other 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 3630mt
  • Year 1968
    Description Ore Tonnages Are Calculated From Product 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 3630mt
  • Year 1969
    Description Tonnages Using A 1.2:1 Ore:Product Ratio 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 3630mt
  • Year 1970
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 3630mt
  • Year 1971
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3630mt
  • Year 1972
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3630mt
  • Year 1973
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3630mt
  • Year 1974
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3630mt
  • Year 1975
    Description 3630 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3630mt
  • Year 1976
    Description 3549 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3549mt
  • Year 1977
    Description 4294 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 4294mt
  • Year 1978
    Description 4229 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 4229mt
  • Year 1979
    Description 4083 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 4083mt
  • Year 1980
    Description 3818 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3818mt
  • Year 1981
    Description 3285 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 3285mt
  • Year 1982
    Description 4316 Mt Ore (Diluted)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 4316mt

Comments on the production information

  • THE GRADE SHOWN IS A WEIGHTED AVERAGE FOR ALL PRODUCTS.

Comments on the reserve resource information

  • M1C1=M9C4. GRADES SHOWN IN THE QA DATA SET ARE WEIGHT-PERCENT CARBON. MINE RECOVERY = 100%. DILUTION = 10.08%. THE RECOVERABLE DILUTED RESOURCE = 98,016 MT AT 86.3% CARBON.

Workings at the site

  • Type of workings Underground
    Overall depth 220M
    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. SUPPORTING
    Mine Support Chars. TIMBER
    Number of Shafts 2
    1st Condition of Workings OPEN
    Capacity 15.4
    Capacity Units MT ORE/DAY
    Unit Production Cost 169.5
    Units of Production $/MT ORE
    Operating Days per Year 275
    Operating Shifts per Day 2
    Year of Information 1983

Comments on other economic factors

  • THE SRI LANKA GOVERNMENT NATIONALIZED K-K IN 1973, BUT NO COMPENSATION HAS YET BEEN GIVEN TO THE PREVIOUS OWNER. MINE AND MILL EQUIPMENT REPLACEMENT COSTS ARE INCLUDED IN THE MINE AND MILL OP. COSTS.

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 MINING AND PROCESSING AT BOGALA MINES

  • Deposit

    SRI LANKA TECHNICAL PAPER PRESENTED IN YUGOSLAVIA 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 05-JUN-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.

Maps centered on this site