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Yamato Mine

Past Producer in Nara, Japan with commodity Mercury
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Production statistics
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10040053
MRDS ID M053070
Record type Site
Current site name Yamato Mine

Geographic coordinates

Geographic coordinates: 135.96548, 34.46538 (WGS84)
Elevation 300
Relative position APPROX 7 KM SSE OF THE HAIBARA STATION, KINKI RR LINE

Site location context

Political divisions (FIPS codes)

Nara(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Nara
Japan Nara

Commodities

Commodity Importance
Mercury Secondary

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue
Kaolin Gangue
Montmorillonite Gangue
Quartz Gangue

Alteration

  • (Local) Argillization (Kaolinite) Silicification (Very Wide Spread Within Mine Area)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) 135.96548, 34.46538
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Median Tectonic Line; 3 Fracture Systems Trending Ew, Nw, And Wnw; Fault At Kamio Mine.

Ore body information

  • General form PIPE
    Strike NS N 30 - 80 DEG W
    Dip W 30 - 40 DEG SW 20 - 40 DEG
    Thickness 3M
    Length 100M
    Width 300M
    Depth to top 30M
    Depth to bottom 260M
  • General form PIPE
    Dip W 30 - 40 DEG SW 20 - 40 DEG
  • General form PIPE
    Dip W 30 - 40 DEG SW 20 - 40 DEG

Controls for ore emplacement

  • 3 Fracture Systems: Ew, Nw, Wnw. Hydrothermally-Altered Clay, Brecciated Zones On Footwalls, Hangingwalls Of These

Comments on the geologic information

  • GEOL.DESC: RICH ORE ZONES WHERE VEINS CROSS, OR WHERE DIP IS LOW 4.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1929 - 1945 , 1952 - PRESENT

Mining district

District name Yamato District

Production statistics

  • Year 1954
    Period 1954
    Material HG
    Accuracy Accurate
    Description Cp_Grade: ^Hg Less Than Or Equal To 0.104 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Mercury Mercury 0wt-pct

Comments on the production information

  • MINE OPERATIONS BEGAN IN 1916 ; HOWEVER, NO RECORDS OF PRODUCTION WERE KEPT UNTIL 1929

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Total resources 33079000mt ore
    Commodity Subtype Grade units Group Importance Year
    Mercury Hg 0.03 wt-pct Mercury Minor 1945

Comments on the reserve resource information

  • THIS ESTIMATE MADE PRIOR TO LATER PROSPECTING, DISCOVERY OF 3RD ORE BODY ( 1962 ).

Workings at the site

  • Type of workings Underground
    Overall depth 30M

Reference information

Bibliographic references

  • Deposit

    WAKABAYASHI, J., J. YABUKI, 1967 , "ON THE RELATIONSHIP BETWEEN THE ORE DEPOSIT AND FISSURE OF THE YAMATO MERCURY MINE," MINING GEOLOGY, VOL. 17 ( 82 - 83 ), PP. 113 - 120.

  • Deposit

    YAJIMA, S., F. TSUKADA, 1958 , "TWO OR THREE VIEWS ON THE YAMATO MERCURY PROVINCE", JAPENESE MINING, 74 ( 814 )

  • Deposit

    KISHIMOTO, F., 1952 , "MERCURY DEPOSIT OF YAMATO HG MINE, NARA PREFECTURE," BULLETIN GEOLOGICAL SUR JAP VOL. 4 # 9 PP. 665 - 670

  • Deposit

    TSUKADA, F., ETAL, 1960 , "CONCERNING THE DEPOSITS OF THE YAMATO MERCURY MINE" MINING GEOLOGY VOL 10 ( 139 ) PP. 1 - 7 .

  • Production

    YAJIMA, S., 1954 , "HG MINING IN JAPAN..."

  • Reserve-Resource

    GENERAL HEADQUARTERS FOR THE ALLIED POWERS, NAT RESOURCES SECTION REPORT NO 91, 1947 .

General comments

Subject category Comment text
Deposit WAKABAYASHI & YABUKI ( 1962 ) MAINTAIN THAT THE ORE FORMATION IS CLOSELY RELATED TO SILIFICATION IN THE HOST ROCKS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Roddy, Stephen J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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