1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Aoba

Past Producer in Hokkaido, 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. Mining district
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10040071
MRDS ID M053094
Record type Site
Current site name Aoba

Geographic coordinates

Geographic coordinates: 143.60679, 43.69005 (WGS84)
Relative position 2.5 KM NE OF OKETO

Site location context

Political divisions (FIPS codes)

Hokkaido(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Hokkaido
Japan Hokkaido

Commodities

Commodity Importance
Mercury Secondary

Materials information

Materials Type of material
Cinnabar Ore
Metacinnabar Ore
Calcite Gangue
Opal Gangue
Pyrite Gangue
Sericite Gangue

Alteration

  • (Local) 3000 M X 1000 M Area Of Hydrotherm Clay Alteration

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Holocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) 143.60679, 43.69005
ListMap

Economic information

Ore body information

  • General form TABULAR
    Thickness 15M
    Length 70M
    Width 40M
    Depth to bottom 20M

Controls for ore emplacement

  • Hydrothermally Altered Zone

Comments on the geologic information

  • GEOL.DESC: HIGH OPAL, FES2 ; ANDESITE FRACTURED; ABUNDANT METACINNABAR

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Production years 1944 - 1948

Mining district

District name Oketo Mine

Comments on the production information

  • PRODUCTION FIGURES ARE FOR ENTIRE OKETO MINE. HG ORE GRADE RANGED HG = 3.00 % TO HG = 0.76 % DURING PRODUCTION PERIOD. AOBA IS PRINCIPAL DEPOSIT AT OKETO

Reserves and resources

  • Type In-situ
    Estimate year 1945
    Total resources 7422000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Mercury Hg 0.79 wt-pct Mercury Minor 1945

Comments on the reserve resource information

  • FIGURES INCLUDE "PROVED" AND "PROBABLE" RESERVES (NOTE-THIS ESTIMATE MADE 3 YRS BEFORE MINE CLOSED)

Reference information

Bibliographic references

  • Deposit

    HORI, S., 1953 , "MERCURY DEPOSITS OF JAPAN," GEOL SUR JAP REP NO 154 , P. 102 - 103

  • Deposit

    HILPERT, LS., 1947 , "MERCURY RESOURCES OF JAPAN," GHQ SCAP NAT RES SEC REP NO 91

  • Production

    HORI, S., 1953 , GEOL SUR JAP REPORT

  • Reserve-Resource

    HILPERT, L.S., 1947 , GHQ SCAP NAT RES SEC REP 91

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-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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