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  3. Mineral Resource Data System (MRDS)

Kun-Ja

Producer in Korea, South 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. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10158648
MAS/MILS ID 5800350003
Record type Site
Current site name Kun-Ja
Alternate or previous names Gun-Ja

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 126.81009, 37.34287 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Korea, South(country)

Federal lands

Federal(land status)

Geographic areas

Country
Korea, South

Commodities

Commodity Importance
Graphite Critical Primary

Materials information

Materials Type of material
Graphite Unknown

Nearby scientific data

Ore Body (1) 126.81009, 37.34287
ListMap

Economic information

Ore body information

  • Thickness 2.5M
    Length 500M
    Width 300M
    Depth to top 0.5M
    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. UNKNOWN
    Avg. Thick. Unconsol. Mat. .5
    Date of Last Modification 850410
  • Area 15HA
    Field Value
    Total Surface Area (HA) 15
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1943
Mining method Open Pit
Year of first production 1959
Milling method Flotation

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Dae Han Graphite Mining Co.
    Interest 100
    Home office Korea R
    Year 1983

Production statistics

  • Year 1967
    Description Diluted Ore Averages 3.57% Carbon. 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt 4wt-pct
  • Year 1968
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1969
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1970
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1971
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1972
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1973
    Description 22667 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 22667mt
  • Year 1974
    Description 20000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 20000mt
  • Year 1975
    Description 21333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 21333mt
  • Year 1976
    Description 20000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 20000mt
  • Year 1977
    Description 22667 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 22667mt
  • Year 1978
    Description 18667 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 18667mt
  • Year 1979
    Description 13333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 13333mt
  • Year 1980
    Description 13333 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 13333mt
  • Year 1981
    Description 16000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 16000mt
  • Year 1982
    Description 20000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 20000mt

Comments on the production information

  • THE MINE WAS EVIDENTLY OPERATED FOR A SHORT PERIOD DURING SOME PART OF THE PERIOD 1946-50. THE PRESENT OPERATION STARTED IN 1959. MINING OF THE PRESENT OREBODY BEGAN IN 1973.
  • MILL RECOVERY FOR GRAPHITE A IS ACTUALLY 17.9% AND FOR GRAPHITE B IS ACTUALLY 63.8%.
  • THE GUN-JA DEPOSIT ACTUALLY PRODUCES FOUR DIFFERENT CONCEN- TRATES KNOWN AS GRADES A, B, C, AND D. FOR PURPOSES OF EVALUATION, GRADES A AND B WERE COMBINED AS GRAPHITE A, AND GRADES C AND D WERE COMBINED AS GRAPHITE B. GRAPHITE A HAS 85% CARBON, IS +80 MESH IN SIZE, AND COMPRISES 20% OF TOTAL PRODUCTION. GRAPHITE B HAS 75% CARBON, IS -80 MESH IN SIZE, AND COMPRISES 80% OF TOTAL PRODUCTION. THE PRODUCTION RATES IN 1982, 1983, AND 1984 THROUGH LIFE ARE ALL DIFFERENT. THEREFORE, 6 P DATA SETS ARE REQUIRED. PA, PC, AND PE ARE ALL GRAPHITE A CONCENTRATE. PB, PD, AND PF ARE ALL GRAPHITE B CONCENTRATE. THE 6 DATA SETS ARE NEEDED TO SHOW VARYING OUTPUT LEVELS AND MILL OP. COSTS. IT SHOULD BE NOTED THAT GUN-JA ALSO PRODUCES BRICKS MADE FROM THE GRAPHITE TAILS. ALTHOUGH NONE OF THE COSTS GIVEN IN THIS EVALUATION RELATE TO THE BRICK-MAKING OPER- ATION, IT APPEARS THAT THE DEMAND FOR BRICKS MAY BE THE MOST IMPORTANT FACTOR IN DETERMINING THE GRAPHITE PROD- UCTION LEVEL, RATHER THAN THE DEMAND FOR GRAPHITE. ALTHOUGH THIS IS SPECULATION, IT IS SUPPORTED BY THE FACT THAT BRICK PRODUCTION APPEARS TO BE MORE IMPORTANT TO THE MINE ECONOMICS THAN GRAPHITE PRODUCTION.

Comments on the reserve resource information

  • M1C1=M9C4. DEMONSTRATED RESOURCE TONNAGE SUPPLIED BY MINE MANAGER. THE INFERRED TONNAGE WAS ESTIMATED BY ZELLARS-WILLIAMS, INC. ALL TONNAGES INCLUDE 12% DILUTION AND ARE 100% RECOVERABLE. GRADE ALSO REFLECTS DILUTION. IT SHOULD BE NOTED THAT GUN-JA HAS A LARGE INFERRED RESOURCE. ALTHOUGH THIS MATERIAL IS NOT INCLUDED IN THE EVALUATION, IT HAS THE POTENTIAL TO GREATLY EXTEND THE MINE LIFE.
  • KOREAN INSTITUTE OF ENERGY AND RESOURCES, GEOLOGY OF KOREA, 1975 MINERAL RESOURCES OF KOREA, V.V1 B, 1963. RESERVE UPDATED TO DEC. 1988

Workings at the site

  • Type of workings Surface
    Area 15HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method STRIP-HILLSIDE
    Swell Factor .6
    Percent Waste Rock 16.7
    Avg. Overburden Thickness .5
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore SAND, SILT
    Capacity 125
    Capacity Units MT ORE/DAY
    Unit Production Cost 3.66
    Units of Production $/MT ORE
    Operating Days per Year 160
    Operating Shifts per Day 2
    Year of Information 1982
  • Type of workings Surface
    Area 15HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Mining Method STRIP-HILLSIDE
    Swell Factor .6
    Percent Waste Rock 16.7
    Avg. Overburden Thickness .5
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore SAND, SILT
    Capacity 83
    Capacity Units MT ORE/DAY
    Unit Production Cost 3.96
    Units of Production $/MT ORE
    Operating Days per Year 160
    Operating Shifts per Day 2
    Year of Information 1982
  • Type of workings Surface
    Area 15HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 3
    Status of Mining Method ESTIMATE
    Mining Method STRIP-HILLSIDE
    Swell Factor .6
    Percent Waste Rock 16.7
    Avg. Overburden Thickness .5
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore SAND, SILT
    Capacity 133
    Capacity Units MT ORE/DAY
    Unit Production Cost 3.62
    Units of Production $/MT ORE
    Operating Days per Year 160
    Operating Shifts per Day 2
    Year of Information 1982

Comments on the workings information

  • PRECIPITATION AMOUNT IS NOT KNOWN, BUT WINTERS ARE SEVERE AND SUMMERS ARE VERY WET. THE THIN SOIL IN THE AREA IS LATERITIC. THE WORKING SEASON IS BASICALLY SPRING AND FALL BECAUSE OF WEATHER CONDITIONS. THE 15 HECTARES OF LAND POTENTIALLY DISTURBED REFLECTS ONLY THE AREA OF DEMONSTRATED RESERVES. IF INFERRED RESOURCES ARE INCLUDED, THE AREA INCRESES TO 2550 HECTARES (TOTAL MINERAL HOLDINGS).

Comments on other economic factors

  • MINE-TO-MILL TRANSPORTATION COSTS INCLUDED IN MINE OP. COST. CONCENTRATE IS SHIPPED TO A COMPANY WAREHOUSE IN SEOUL.
  • THE CAPACITY FIGURES GIVEN REFLECT CHANGES IN THE PRODUCTION RATE, NOT CHANGES IN THE DESIGN CAPACITY. THE SURFACE AREA SHOWN IS ONLY FOR THE PRESENT OREBODY. IT DOES NOT REFLECT MINING OF INFERRED RESOURCES.
  • MINE/MILL DESIGN CAPACITY IS CONSTANT, BUT THE PRODUCTION RATE CHANGES IN 1983 AND IN 1984.

Reference information

Bibliographic references

  • Deposit

    KOREAN INSTITUTE OF ENERGY AND RESOURCES, THE GEOLOGY OF

  • Deposit

    KOREA, 1975.

  • Deposit

    YOO, KYUNG SEOK, MANAGING DIRECTOR, DAE HAN GRAPHITE MINING

  • Deposit

    COMPANY, INTERVIEW CONDUCTED BY STAFF MEMBERS FROM

  • Deposit

    ZELLARS-WILLIAMS, INC., 1983.

  • Deposit

    KOREA GRAPHITE MINING COMPANY, PERS. COMMUN., 1983.

  • Deposit

    KOREA MINING PROMOTION CORP., PERS. COMMUN., 1983.

  • Deposit

    KOREA INSTUTUTE OF ENERGY AND RESOURCES, PERS. COMMUN.,

  • Deposit

    1983.

General comments

Subject category Comment text
Deposit COST DATA FOR THIS PROPERTY 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. THE DIMENSIONS OF MINERALIZATION REFLECT ONLY THE AREA OF DEMONSTRATED RESERVES.

Reporter information

Type Date Name Affiliation Comment
Reporter 28-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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