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Kuga

Occurrence in Yamaguchi, Japan with commodity Tungsten
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Host and associated rocks
  7. Nearby scientific data
  8. Geologic structures
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Production statistics
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10024802
MRDS ID ISM0554
Record type Site
Current site name Kuga

Geographic coordinates

Geographic coordinates: 131.99668, 34.0562 (WGS84)

Site location context

Political divisions (FIPS codes)

Yamaguchi(province)

Japan(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
Japan Yamaguchi

Comments on the location information

  • EAST OF RUHENGERI

Commodities

Commodity Importance
Tungsten Critical Primary

Comments on the commodity information

  • TUNGSTEN

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Kuga Group
    Rock description Kuga Group
    Stratigraphic age (youngest) Late Triassic

Nearby scientific data

(1) 131.99668, 34.0562
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Economic information

Geologic structures

Type of structure Regional
Structure description Axial Crest Of Anticlinorium

Comments on the geologic information

  • ; QRTZ + FRBR -+ ANTHOINITE; THE KIFURUWE DEPOSIT CONSISTS OF THICK QUARTZ VEINS AND STOCKWORKS OF THIN QUARTZ VEINLETS WHICH CUT ALTERED GRAPHITIC SCHIST. ONLY THE THIN QUARTZ VEINLE TS AND ALTERED GRAPHITIC SCHISTS ARE MINERALIZED WITH FERBERITE AND ANTHOINITE.
  • ; SCLT + CLCP + PYTT + SPLR + CSTR + HDBG + GRNT + AMPB + QRTZ + FLRT; MORE THAN 100 SKARN OREBODIES PRESENT; OREBODIES ARE ELONGATE PARALLEL TO F OLD AXES OF HOST ROCKS. MALAYAITE IS A MINOR IMPURITY IN SCHEELITE. DEPOSITS PR OBABLY OVERLIE A HIDDEN CRETACEOUS GRANITIC PLUTON.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1580

Ownership information

  • Type Owner
    Owner Tanaka Mining Co.

Production statistics

  • Year 1979
    Period 1976-79 (AV)
    Accuracy Accurate
    Description Ap_Grade: ^57.9% W
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Tungsten Tungsten 58wt-pct
  • Year 1979
    Period 1974-79
    Accuracy Accurate
    Description Cp_Grade: ^58% W(Est.)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Conc. Tungsten Tungsten 58wt-pct

Comments on the production information

  • PA1-PA6: INCLUDES PRODUCTION, IF ANY FROM PEGMATITIC TIN BELT NEAR RUTONGO IN CENTRAL TWANDA, WHERE WOLFRAMITE, SCHEELITE, FERBERITE AND REINITE ARE PRODU CED AS BYPRODUCTS OF TIN MINING OPERATIONS.

Comments on development

  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. (). ASSESSMENT(IN JULY 1985, SOMIRWA WENT INTO RECEIVERSHIP. THE WORLD BANK AND EUROPEAN E CONOMIC COMMUNITY ARE CARRYING OUT STUDIES ON THE RWANDAN MINING INDUSTRY (RF2, P. 409).); IN 1984-85, A COOPERATION AGREEMENT WAS SIGNED BY PRIVATE AND PUBLIC SECTOR REPRESENTATIVES WITH THE OBJECTIVE OF RAISING MINERAL EXPORTS TO 2,000 TPY OF C ASSITERITE, 590 TPY OF FERBERITE AND 50 TPY OF COLUMBO-TANTALITE (RF3).
  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. (). ONE OF TWO MAIN TUNGSTEN-PRODUCING MINES IN JAPAN IN 1985.

Reference information

Bibliographic references

  • Deposit

    HIGASHIMOTO, S., 1977, GEOLOGY AND ORE DEPOSITS OF THE KUGA MINE, SOUTHWEST JAPAN, JAPAN GEOLOGICAL SURVEY BULLETIN, VOL. 28, P. 775-793. (IN JAPANESE)

  • Production

    PA1: ROSKILL'S LETTER FROM JAPAN, NO. 11, MARCH 1977, P. 4.; NO. 27, JULY 1 978, P. 2; NO. 60, APRIL 1981, P. 6. PC1: ROSKILL'S LETTER FROM JAPAN, NO. 1, MARCH 1977, P. 4; NO. 27, JULY 197 8, P. 2; NO. 60, APRIL 1981, P. 6.

General comments

Subject category Comment text
Deposit THIS RECORD WAS COMPILED FOR THE INTERNATIONAL STRATEGIC MINERALS INVENTORY. THE DATA WERE USED IN PREPARATION OF THE USGS CIRCULAR 930 SERIES OF REPORTS. MINERAL RESOURCE CATEGORIES AND CODES HEREIN ARE FROM THE INTERNATIONAL CLASSIFICATION SYSTEM RECOMMENDED BY THE UNITED NATIONS GROUP OF EXPERTS ON DEFINITIONS AND TERMINOLOGY FOR MINERAL RESOURCES. (SEE NATIONAL RESOURCES FORUM, V. 4, NO. 3, P. 307-313.). IN 1979, WOLFRAMITE CONCENTRATES REPORTED TO BE AIRFREIGHTED TO EUROPE. (RF1 )
Deposit THIS RECORD WAS COMPILED FOR THE INTERNATIONAL STRATEGIC MINERALS INVENTORY. THE DATA WERE USED IN PREPARATION OF THE USGS CIRCULAR 930 SERIES OF REPORTS. MINERAL RESOURCE CATEGORIES AND CODES HEREIN ARE FROM THE INTERNATIONAL CLASSIFICATION SYSTEM RECOMMENDED BY THE UNITED NATIONS GROUP OF EXPERTS ON DEFINITIONS AND TERMINOLOGY FOR MINERAL RESOURCES. (SEE NATIONAL RESOURCES FORUM, V. 4, NO. 3, P. 307-313.).
Deposit Discovery Year: 1580 (1911 FOR FIRST TUNGSTEN PRODUCTION?)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1986 Sinclair, W.David Geological Survey of Canada

Beyond USGS

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

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