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  3. Mineral Resource Data System (MRDS)

Nanbu

Past Producer in 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. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10040097
MRDS ID M053124
Record type Site
Current site name Nanbu

Geographic coordinates

Geographic coordinates: 143.16514, 43.67337 (WGS84)
Elevation 1100
Relative position APPROX. 8 KM E OF OMACHI

Site location context

Political divisions (FIPS codes)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country
Japan
Japan

Commodities

Commodity Importance
Mercury Secondary

Comments on the commodity information

  • NATIVE HG: CINNABAR = 7:3

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue
Dolomite Gangue
Illite Gangue
Kaolin Gangue
Marcasite Gangue
Montmorillonite Gangue
Pyrite Gangue
Stibnite Gangue

Alteration

  • (Local) Propyllization, Argillization, Carbonization, Sillicification.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Nearby scientific data

(1) 143.16514, 43.67337
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Basement Anticline W/Ns Axis, Ew-Trending Near Vertical Faults; Shear Zones Which Are Roughly Parallel To Faults, Brecciated Veins, With Ns Trend

Ore body information

  • General form BULGING LENSOID
    Strike EW
    Dip 40 DEG S
    Thickness 2M
    Length 120M
    Width 240M
    Depth to top 40M
    Depth to bottom 100M

Controls for ore emplacement

  • Kaolinized Zones Located Along On Echelon Shear Zones Conjugate To The Nanbu Fault Localized The Hg Ore.

Comments on the geologic information

  • GEOL.DESC: 3 PARALLEL VEINS LOCATED ALONG

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1967 - PRESENT

Mining district

District name Itomuka Mine

Workings at the site

  • Type of workings Underground
    Overall depth 40M

Comments on the workings information

  • THE MINE SHAFTS AT THE NANBU DEPOSIT WERE EXTENDED FROM THE WORKINGS AT THE YANATO DEPOSIT

Reference information

Bibliographic references

  • Deposit

    SUGIMOTO, R., ET AL 1972 , "MERCURY ORE DEPOSITS OF THE ITOMUKA DISTRICT, ABASHIRI PROVINCE, HOKKAIDO," REPORT #5-2 OF THE INVESTIGATIONS FOR THE PROMOTION OF DEVELOPMENT OF ESSENTIAL MINERALS; HOKKAIDO GEOL SUR REP. NO. 23 PP. 1 - 23

  • Deposit

    USHISAWA, N, 1968 , "MATERIALS OF THE COMMITTEE FOR RESEARCH OF AU-AG & HG DEPOSITS, CONCERNING METAMORPHISM OF THE COUNTRY RX OF ITOMUKA DEPOSIT," JAPAN MINING GEOLOGY ASSOC., HOKKAIDO BRANCH

  • Deposit

    YOSHIRO, Y., 1967 , "STUDY ON THE GEOLOGY AND ORE DEPOSITS OF ITOMUKA DISTRICT," (MANUSCRIPT)

  • Deposit

    TSUKADA, F., 1959 , "PECULIARITIES OF RESEARCH AT THE ITOMUKA MINE," JAP MINING MAG. VOL 75 NO 855

  • Production

    SUGIMOTO ET AL, ( 1971 )

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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