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Kosaka Zn - Cu - Pb - Ag - Au - Pyr Mines

Producer in Akita, Japan with commodities Copper, Zinc, Lead, Silver, Gold, Sulfur-Pyrite
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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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10073094
MRDS ID W018909
Record type Site
Current site name Kosaka Zn - Cu - Pb - Ag - Au - Pyr Mines
Alternate or previous names Uchinotai Mine and Others

Geographic coordinates

Geographic coordinates: 140.74832, 40.32847 (WGS84)
Relative position 23 KM ENE OF OHDATE CITY

Site location context

Political divisions (FIPS codes)

Akita(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Akita

Comments on the location information

  • LOCAL RELIEF IS MODERATE - 170 TO 540 M. ASL

Commodities

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

Comments on the commodity information

  • ANTIMONY AND CADMIUM ARE ALSO BYPRODUCTS

Materials information

Materials Type of material
Argentite Ore
Barite Ore
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Gypsum Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
    Rock unit name Uwamuki Formation Tuff Breccia (Nishikurosawa Formation);Other Green Tuff Horizons
    Rock description Uwamuki Formation Tuff Breccia (Nishikurosawa Formation);Other Green Tuff Horizons
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) 140.74832, 40.32847
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Hokuroku Basin
Type of structure Local
Structure description Hanawa Fault, Ashinazawa Fault

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Associated With White Rhyolite Domes.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1861
Year of first production 1884

Mining district

District name Hokuroku Basin

Ownership information

  • Type Owner-Operator
    Owner Dowa Mining Co. Ltd.

Production statistics

  • Year 1945
    Period 1884-1945
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^1.97 % Cu (Motoyama Dep.)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Copper Copper 2wt-pct
  • Year 1973
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^5.04 % Zn, 1.89 % Cu, 1.67 % Pb, 14. % Pyr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Copper Copper 2wt-pct
    Major Ore Zinc Zinc 5wt-pct
    Ore Pyrite Pyrite 14wt-pct
    Major Ore Lead Lead 2wt-pct
  • Year 1976
    Period 1970-1976
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^8.16 % Zn, 2.25 % Pb, 0.79 % Cu, 7.79 % Pyr (Uwamuki Deps.)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Pyrite Pyrite 8wt-pct
    Ore Copper Copper 1wt-pct
    Major Ore Lead Lead 2wt-pct
    Major Ore Zinc Zinc 8wt-pct
  • Year 1976
    Period 1962-1976
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^2.5 % Cu, 1.3 % Pb, 4.2 % Zn, 18 % Pyr (Uchinotai Deds.)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Copper Copper 3wt-pct
    Ore Pyrite Pyrite 18wt-pct
    Major Ore Zinc Zinc 4wt-pct
    Major Ore Lead Lead 1wt-pct

Comments on the production information

  • MOTOYAMA IS MINED OUT. REMAINING UCHINOTAI AND UWAMUKI DEPOSITS MINE 33,500 AND 10,000 MTPM ORE RESPECTIVELY. ITEM 9 - BASED ON 31,750 MTPM AVERAGE MILL CAP. ITEM 10 BASED ON 10,000 MTPM ORE CAPACITY

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Total resources 3500000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.5 wt-pct Copper Major 1977
    Zinc Zn 4.2 wt-pct Zinc Major 1977
    Lead Pb 1.3 wt-pct Lead Major 1977
    Sulfur-Pyrite S_P 18 wt-pct Sulfur Minor 1977
  • Type In-situ
    Estimate year 1977
    Total resources 7500000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.79 wt-pct Copper Major 1977
    Zinc Zn 8.16 wt-pct Zinc Major 1977
    Lead Pb 2.25 wt-pct Lead Major 1977
    Sulfur-Pyrite S_P 7.79 wt-pct Sulfur Minor 1977
  • Type In-situ
    Estimate year 1977
    Total resources 35000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.5 wt-pct Copper Major 1977
    Zinc Zn 4.2 wt-pct Zinc Major 1977
    Lead Pb 1.3 wt-pct Lead Major 1977
    Sulfur-Pyrite S_P 18 wt-pct Sulfur Minor 1977
  • Type In-situ
    Estimate year 1977
    Total resources 75000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.79 wt-pct Copper Major 1977
    Zinc Zn 8.16 wt-pct Zinc Major 1977
    Lead Pb 2.25 wt-pct Lead Major 1977
    Sulfur-Pyrite S_P 7.79 wt-pct Sulfur Minor 1977

Comments on the reserve resource information

  • ITEM 1 - UCHINOTAI DEPOSITS. ESTIMATE BASED ON 9,240,000 MT ORIGINAL RESV. MINUS 5,715,000 MT. PROD. 1962 - 1976 (31,750 MTPM X 15 YRS). ITEM 2 - UWAMUKI DEPOSITS. ESTIMATE BASED ON 25 MIL. T. KOSAKA TOTAL, MINUS 9,240,000 MT UCHINOTAI, 7,488,000 MT MOTOYAMA, 840,000 MT PROD. 1970 - 76 (10,000 MTPM X 7 YEARS)
  • ITEM ONE - UCHINOTAI DEPOSITS. ESTIMATE BASED ON 9,240,000 MT ORIGINAL RESV. MINUS 5,715,000 MT PROD. 1962 - 1976 (31,750 MTPM X 15 YRS). ITEM 2 - UWAMUKI DEPOSITS. ESTIMATE BASED ON 25 MIL. T. KOSAKA TOTAL, MINUS 9,240,000 MT UCHINOTA', 7,488,000 MT MOTOYAMA, 840,000 MT PROD. 1970 - 1976 (10,000 MTPM X 7 YRS)

Comments on development

  • MILL.CAP: 803 MET TONS ; ECON.YEAR: 1975 ; ECON.COM: 2200 MTPD MILL

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MOTOYAMA - 300 X 700 X 50 (OR 120 DEPENDING ON SOURCE) M., UCHINOTAI - NISHI 400 X 350 X 20 M. UCHINOTAI - HAGASHI 300 X 400 X 16 M UWAMUKI NO. 1 150 X 100 X 7 M, NO. 2 200 X 150 X 40 M., NO. 4 350 X 100 X 17 M.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1977 Schruben, Paul G. U.S. Geological Survey

Beyond USGS

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

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