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  3. Mineral Resource Data System (MRDS)

Yong Un

Prospect 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. Land status
  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 10134303
MAS/MILS ID 5800250001
Record type Site
Current site name Yong Un
Alternate or previous names Ung Gong, Yong Hung, Ryuko, Yong-Un

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 127.44899, 36.31523 (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
Feldspar Unknown
Graphite Unknown
Mica Unknown
Quartz Unknown

Nearby scientific data

Ore Body (1) 127.44899, 36.31523
ListMap

Economic information

Ore body information

  • Strike N20W
    Dip 75E
    Thickness 15M
    Length 100M
    Width 30M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 OTHER
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin METAMORPHISM
    Primary Ore Control BEDDING
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N20W:75E
    Date of Last Modification 850418
  • Area 5HA
    Field Value
    Total Surface Area (HA) 5
    Date of Last Modification 910418

Comments on the geologic information

  • THE ORE OCCURS AS LENTICULAR MASSES (POCKETS) ENCLOSED IN MICA AND QUARTZ SCHISTS. STRIKE AND DIP ARE VARIABLE - AVERAGE IS GIVEN. DIMENSIONS GIVEN ARE FOR THE ORE BLOCK PROPOSED FOR MINING.

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Non-metallic
Significant Yes
Mining method Open Stope - Sublevel
Year of first production 1944
Milling method Flotation

Land status

Ownership category Federal

Ownership information

  • Type Owner
    Owner Republic Of Korea (Government)
    Interest 100
    Home office Korea R
    Year 1982

Production statistics

  • Year 1944
    Description Mine Operated Only In 1944. 69 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Graphite Graphite 69mt

Comments on the production information

  • HANDSORTING INCREASES GRADE FROM 10 TO 30% CARBON. RECOVERY IS ASSUMED TO BE 95% FOR PURPOSES OF MASS BALANCE.
  • MILL OP. COSTS INCLUDED IN MINE OP. COSTS. NO CAPITAL COST FOR THIS HANDSORTING OPERATION. THE PRODUCT FROM HANDSORTING IS GRAPHITIC ORE THAT HAS BEEN UPGRADED TO ABOUT 30% CARBON.

Comments on the reserve resource information

  • KOREAN INSTITUTE OF ENERGY AND RESOURCES, GEOLOGY OF KOREA, 1975. MINERAL RESOURCES OF KOREA V.V1 B, 1963.
  • M1C1=M9C4. RESOURCES (DEMONSTRATED) FROM KOREAN INSTITUTE OF ENERGY AND RESOURCES. INFERRED RESOURCES ESTIMATED FROM OREBODY GEOMETRY.
  • THIS DEPOSIT IS INCLUDED IN GRAPHITE AVAILABILITY REPORT AS AN EXAMPLE OF GRAPHITE DEPOSIT USING UNDERGROUND MINING METHOD.

Workings at the site

  • Type of workings Underground
    Length 2700M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method SUBLEVEL 10-43
    Swell Factor .6
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Avg. Length of Adits (m) 500
    Number of Adits 2
    Capacity 68.8
    Capacity Units MT ORE/DAY
    Unit Production Cost 9.06
    Units of Production $/MT ORE
    Operating Days per Year 215
    Operating Shifts per Day 1
    Year of Information 1982

Comments on other economic factors

  • ACQUISITION WOULD BE BY FEDERAL LEASE AT AN UNKNOWN, BUT PROBABLY LOW, COST. EXPLORATION COSTS ARE ASSUMED TO BE NEGLIGIBLE AS THE OREBODY GEOMETRY IS FAIRLY WELL KNOWN. THERE IS NO MINE OR MILL EQUIPMENT REPLACEMENT BECAUSE OF THE SHORT MINE LIFE. MILL P&E AND MILL OP. COSTS REFER ONLY TO ORE FROM YONG-UN, AND ARE SHOWN IN THE PYONG-TAEK DATABASE. THE MILL WORKING CAPITAL FOR YONG-UN IS ALSO SHOWN ON THE PYONG-TAEK DATABASE. THEREFORE, THIS DATABASE INCLUDES NO MILL CAPITAL OR OPERATING COSTS. THE HANDSORTING COST IS INCLUDED IN THE MINE OP. COST BECAUSE IT WOULD BE PERFORMED BY THE MINERS.

Reference information

Bibliographic references

  • Deposit

    GALLAGHER, D., MINERAL RESOURCES OF KOREA, VOL. VIB, NON-

  • Deposit

    METALLICS AND MISCELLANEOUS METALS, USOM/KOREA, 1963,

  • Deposit

    60 P.

  • Deposit

    KOREAN INSTITUTE OF ENERGY AND RESOURCES (KIER), PERSONAL

  • Deposit

    COMMUNICATION WITH STAFF MEMBERS BY T.D. ABEL, INVESTI-

  • Deposit

    GATOR FOR ZELLARS-WILLIAMS, INC., U.S. BUREAU OF MINES CONTRACT

  • Deposit

    J0225019, JUNE 1983.

  • Deposit

    KIER, GEOLOGY OF KOREA, 1975, 139 P.

General comments

Subject category Comment text
Deposit THE YONG-UN (Y-U) AND PYONG-TAEK (P-T) MINES WILL BOTH FEED THE P-T MILL. THE FOLLOWING DESCRIPTION SHOWS THE RELA- TIONSHIP BETWEEN THESE TWO PROPERTIES: IN 1982, THE P-T MILL WILL HANDLE ONLY 13,400 MT OF ORE FROM THE P-T MINE. THE Y-U MINE AND "MILL" WILL BE UNDERGOING PREPRODUCTION DEVELOPMENT IN 1982. IN 1983, Y-U WILL PRODUCE 14,800 MT OF ORE WHICH WILL BE HAND- SORTED TO PRODUCE 4700 MT OF PRODUCT (AT 30% CARBON) THAT WILL BE SHIPPED TO THE P-T MILL FOR FURTHER PROCES- SING. IN 1983, P-T WILL INCREASE ITS MILL FEED TO 15,000 MTPY. IN 1984, THE P-T MINE WILL AGAIN INCREASE ITS MILL FEED TO 30,000 MTPY. IN 1990, THE Y-U DEPOSIT WILL MINE OUT, AND ALL FEED TO THE P-T MILL WILL AGAIN COME FROM THE P-T MINE AT A RATE OF 30,000 MTPY UNTIL FINAL MINEOUT IN 2016. THE DATABASE FOR Y-U WILL ONLY REFLECT COSTS DIRECTLY RELATED TO MINING OR HANDSORTING OF Y-U ORE. ALL COSTS RELATED TO MILLING OF Y-U ORE ARE SHOWN IN THE P-T DATABASE (BOTH CAPITAL AND OPERATING). HANDSORTING COSTS AT Y-U ARE INCLUDED IN THE Y-U MINE OP. COST.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-APR-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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