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  3. Mineral Resource Data System (MRDS)

Tosakubo Mine

Producer in Kochi, 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. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Production statistics
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10040023
MRDS ID M053028
Record type Site
Current site name Tosakubo Mine

Geographic coordinates

Geographic coordinates: 133.94886, 33.79873 (WGS84)
Relative position APPROX. 2.5 KM NORTH OF YASUNO

Site location context

Political divisions (FIPS codes)

Kochi(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Kochi
Japan Kochi
Japan Kochi

Commodities

Commodity Importance
Mercury Secondary

Materials information

Materials Type of material
Mercury Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) The Native Mercury Is An Alteration Product Of Cinnabar

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Associated
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) 133.94886, 33.79873
ListMap

Economic information

Ore body information

  • Strike N 45 E
    Dip 60 DEG S
    Thickness 0.5M
    Length 700M
    Width 12.5M

Controls for ore emplacement

  • Shear Zone Of Maximum Thickness = .7 M

Comments on the geologic information

  • GEOL.DESC: THE CENTER OF THE ORE VEIN IS DARK BROWN, & GETS LIGHTER TOWARDS THE OUTSIDE. THE CINNABAR HAS PRECIPITATED AMONG A NETWORK OF QUARTZITE & CALCITE VEINLETS (THIS AREA IS ABOUT 6 CM THICK). THE NATIVE HG IS CONCENTRATED IN FRACTURES WITHIN THE QUARTZ, CALCITE, AND SLATE. CINNABAR HAS FORMED GROUPS OF SMALL CRYSTALS IN APERTURES ON THE RODE WALL, WHICH CONTAIN NATIVE MERCURY.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Production statistics

  • Year 1962
    Period 1962
    Material HG
    Accuracy Estimate
    Description Cp_Grade: ^Hg = .3 - 1.0 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Mercury Mercury 1wt-pct

Comments on the production information

  • THE HIGHEST GRADE EXTRACTED WAS ABOUT HG = 12 %

Reference information

Bibliographic references

  • Deposit

    KISHIMOTO, F., 1962 , "MERCURY DEPOSITS OF SHIKOKU, JAPAN", BULL GEOLOGICAL SURVEY OF JAPAN VOL 13 NO 3

  • Deposit

    KOBAYASHI, S., 1950 , REGIONAL GEOLOGY OF JAPAN MAGAZINE, SHIKOKU REGION.

  • Deposit

    FUJITA, A., 1943 , "THE GEOLOGY OF OTOCHI REGION OF SHIKOKU", GEOLOGY MAGAZINE VOL. 50

  • Deposit

    KURATA, N., AOCHI, K., 1941 , "GEOLOGY OF CENTRAL BASIN OF MONOBE", GEOLOGY MAGAZINE VOL. 48

  • Production

    KISHIMOTO, F., 1962 , JOURN GEO SUR JAP

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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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