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Toyoha Mine

Plant in Hokkaido, Japan with commodities Copper, Gold, Lead, Silver, Sulfur, Zinc
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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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10207268
MAS/MILS ID 5880120002
Record type Site
Current site name Toyoha Mine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: 141.04074, 42.81087 (WGS84)
Elevation 550
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Hokkaido(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Hokkaido

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Lead Primary
Silver Secondary
Sulfur Secondary
Zinc Critical Primary

Materials information

Materials Type of material
Galena Unknown
Sphalerite Unknown

Nearby scientific data

Ore Body (1) 141.04074, 42.81087
ListMap

Economic information

Ore body information

  • Length 3600M
    Width 1200M
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control IGNEOUS
    Date of Last Modification 830726

Comments on the geologic information

  • TWO TYPES OF ORE VEINS ARE RECOGNIZED. ONE COMPOSED OF SPHALERITE, GALENA, MAGNETITE, HEMATITE ASSOCIATED WITH DRUSEY QUARTZ; THE SECOND IS CHARACTERIZED BY GANGUE MINERALS OF MANGANESE CARBONATE, CALCITE, OPALIZE SILICA, CHLORITE, SERICITE AND KAOLIN. SILVER MINERALS ARE PRIMARILY SILVER SULFO-SALTS.

Economic information about the deposit and operations

Operation type Underground
Development status Plant
Commodity type Both
Significant Yes
Discovery year 1800
Mining method Open Stope - Sublevel
Year of first production 1932
Plant type Beneficiation (Mill)
Plant subcategory Flotation
Milling method Flotation

Mining district

District name Jozankei Hotspa

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Nippon Mining Co., Ltd.
    Interest 100
    Home office Japan
    Year 1993
    First year 1973
    Last year 1994
  • Type Operator
    Owner Toyoha Mining Co. Ltd
    Home office Japan
    Year 1993
    First year 1973
    Last year 1994

Production statistics

  • Year 1939
    Description Zinc, Lead, Silver Ore 10000 Mt Per Month
  • Year 1942
    Description Zinc, Lead, Silver Ore 20000 Mt Per Month
  • Year 1963
    Description Zinc, Lead, Silver Ore 30000 Mt Per Month
  • Year 1971
    Description Zinc, Lead, Silver Ore 60000 Mt Per Month
  • Year 1992
    Description Ore Production 500000 Mt/Yr

Comments on the production information

  • SURFACE AND UNDERGROUND EXPLORATION IS PRESENTLY BEING CONDUCTED TO EXPAND THE MINE

Comments on the reserve resource information

  • CHANGE OVER TO A PRIMARY ZINC (ADIT 12-86)
  • MINE RECOVERY IS 85%; DILUTION, 15% MINABLE ORE RESERVES, COMPANY REPORT, 1993.

Workings at the site

  • Type of workings Underground
    Overall depth 400M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method SUBLEVEL 10-43
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Number of Shafts 2
    1st Condition of Workings OPEN
    Capacity 1500
    Capacity Units MT ORE/DAY
    Unit Production Cost 11.7
    Units of Production $/MT ORE
    Operating Days per Year 320
    Operating Shifts per Day 2
    Year of Information 1981

Comments on other economic factors

  • TWO SHAFTS ARE IN OPERATION AND IN 1981 A THIRD WAS NEARING COMPLETION.
  • DISTANCE TO OTARU PORT IN SUMMER IS 60 KM, IN WINTER IT IS 85 KM. ZINC CONCENTRATES ARE SENT FROM OTARU TO THE NIPPON MINING CO MIKKAICHI SMELTER NEAR TOYAMA HONSHU ISLAND LEAD CONC. ARE SOLD TO TOHO ZINC CO FOR SMELTING AT THEIR CHIGIRISHIMA SMELTER, HONSU ISLAND.

Reference information

Bibliographic references

  • Reserve-Resource

    E&MJ INTERNATIONAL DIRECTORY OF MINING, 1991

  • Deposit

    MINING MAG 9-76 V133 N09 P245

  • Deposit

    75 E/MJ DIRECTORY OF MINES

  • Deposit

    KOJIMA, S., ET AL, THE MODES OF OCCURRANCE AND MINERALOGY OF

  • Deposit

    SILVER MINERALS FROM THE TOYOHA MINE, IN MINING GEOLOGY,

  • Deposit

    29 (3), PP. 297-206, 1979

  • Deposit

    SHIKAZONO, N. MINERALIZATION AND CHEMICAL ENVIRONMENT OF

  • Deposit

    THE TOYOHA LEAD-ZINC VEIN-TYPE DEPOSITS, HOKKAIDO,JAPAN,

  • Deposit

    IN ECONOMIC GEOLOGY, VOL. YO, 1975, PP. 694-705.

  • Deposit

    TPLIMAGA, M., LEAD-ZINC VEINS OF THE TOYOHA MINE IN

  • Deposit

    VOLCANISM AND ORE GENESIS (TATSUMI, T., ED), UNIVERSITY

  • Deposit

    OF TOKYO PRESS, 1970.

  • Deposit

    YAJIMA, J., AND OHTA, E., TWP-STAGE MINERALIZATION AND

  • Deposit

    FORMATION PROCESS OF THE TOYOHA DEPOSITS, HOKKAIDO,

  • Deposit

    JAPAN,IN MINING GEOLOGY, 29 (5) PP. 291-306, 1979.

Reporter information

Type Date Name Affiliation Comment
Reporter 28-SEP-94 Buckingham, David A. U.S. Bureau of Mines

Beyond USGS

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

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