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  3. Mineral Resource Data System (MRDS)

Nirabu

Past Producer in Kochi, Japan with commodities Manganese, 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. Production statistics
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10103765
MRDS ID M053029
Record type Site
Current site name Nirabu
Alternate or previous names Kochi Registration # 71

Geographic coordinates

Geographic coordinates: 133.98219, 33.79873 (WGS84)
Relative position OTOCHI

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
Manganese Critical Secondary
Mercury Secondary

Materials information

Materials Type of material
Braunite Ore
Cinnabar Ore
Hausmanite Ore
Quartz Gangue

Alteration

  • (Local) Horizontal Fault Has Been Filled With Graphite

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) 133.98219, 33.79873
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description 2 Types Of Faults, One Is N -S W/50 - 100 M Of Offset, One E-W W/10 - 20 M Offset. Also A Nearly Horizontal Fault Has Formed Directly Beneath The Deposit.

Ore body information

  • Thickness 5M
    Length 20M
    Width 40M

Controls for ore emplacement

  • Anticlinal-Saddle Structure; Mn-Deposit Is Most Abundant In The Sw Area Of Structure, Where Fold Is Overturned. Also, Faults Split The Deposit Into 5 Ore Bodies. Cinnabar Fills The Fault Shear Zone, And Small Fractures Within The Mn Deposit.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Production statistics

  • Year 1962
    Period 1962
    Material MN
    Accuracy Accurate
    Description Cp_Grade: ^Mn-Carbonate/Mn = 24 - 47 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Manganese Manganese 36wt-pct
  • Year 1962
    Period 1962
    Material MN
    Accuracy Accurate
    Description Cp_Grade: ^Mno2, Mn = 29 - 47 %
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Manganese Manganese 38wt-pct

Comments on the production information

  • VERY SMALL QUANTITIES OF CINNABAR HAVE BEEN PRODUCED. SMALL VEINS OCCUR IN THE DEEPER ZONES OF THE CARBONATE ORE BODIES.

Comments on the reserve resource information

  • AS MN ORE GRADE LOWERS, THE PRODUCTION OF CINNABAR WILL INCREASE.

Reference information

Bibliographic references

  • Deposit

    KISHIMOTO, F., 1962 , "MERCURY DEPOSITS OF SHIKOKU, JAPAN", BULL GEOL SUR OF JAPAN, VOL 13 , NO 3 PP 333 - 51

  • Deposit

    OFFICE OF THE GEOL SURVEY OF JAPAN, 1954 , JAPAN MINING MAGAZINE, BI-C

  • Deposit

    YOSHIMURA, T., 1952 , MANGANESE DEPOSITS OF JAPAN.

  • Deposit

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

  • Production

    KISHIMOTO, F., 1962 , JOUR GEOL SUR JAP

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1978 Roddy, Steve 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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