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Study on the physical properties and genesis of borate minerals in skarns.

Research Project

Project/Area Number 08640608
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionOkayama University

Principal Investigator

KUSACHI Isao  Okayama University, Faculty of Education, Professor, 教育学部, 教授 (10032773)

Co-Investigator(Kenkyū-buntansha) HENMI Chiyoko  Okayama University, Faculty of Science, Assistant Professor, 理学部, 助教授 (80124791)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1996: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsFuka / skarn / borate mineral / gehkenite / spurrite / parasibirskite / takedaite / minerals of CaO-B2O3-H2O system / スカルン / CaO-B2O3-H2O系鉱物 / sibirskite / borcarite / ホウ酸塩鉱物 / 交代作用 / Sibirskite / Ttakedaite
Research Abstract

The present study aims at claryfing the physical properties and genesis of borate minerals in skarns, which are formed as high-temperature metasomatic products at Fuka, Okayama Prefecture.
1. Occurrence of borate minerals : Skarn minerals such as gehlenite and spurrite were primarily formed as high-temperature metasomatic products. During the post-metassomatic stage, the skarns were cut by numerous veins which consist of hydrated calcium silicates, fluoline-bearing minerals, and boron-bearing minerals. A vein consisting of borate minerals developed along the boundary between crystalline limestone and the skarns. The vein was approximately 10 cm in thickness, although in one part expanded to 3m. At the center of the expanded area, takedaite occurred. At the circumference of the expanded area, hydrous borates such as olshankyite, frolovite, sibirskite, borcarite and parasibirskite occurred 20 cm to 50 cm in thickness.
2. physical properties of borate minerals : The mineralogical propertes such as optical properties, hardness, density, X-ray diffraction properties, chemical composition, thermal properties and Infrared absorption spectrum of many borate mineals, were revealed through this study.
3. Genesis of borate minerals : From the mode of occurrence, the data on the sulphide minerals and the data reported by Schafer (1968), the formation of these minerals may be considered as follows : (1) takedaite was formed by reaction of boron-bearing fluids with limestone ; (2) sibirskite and parasibirskite were formed by hydrothermal alteration of takedaite ; (3) the late-hydrothemal solution converted sibirskite and parasibirskite to olshanskyite, frolovite, etc.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Kusachi, Isao: "Johnbaumite from Fuka,Okayama Prefecture,Japan." Mineralogical Journal. 18. 60-66 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Henmi Chiyoko: "Zirconium nimerals and zirconian garnet from Fuka,Okayama Prefecture,Japan."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Mineralogical Journal. 18. 54-59 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, Isao: "Sibirskite from Fuka,Okayama Prefecture,Japan." Mineralogical Journal. 19. 109-114 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, Isoa: "Borcarite from Fuka,Okayama Prefecture,Japan." Mineralogical Journal. 19. 115-122 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, Isao: "Parasibirskite,a new mineral from Fuka, Okayama Prefecture,Japan" Mineralogical Magazine. 62(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Henmi, C., Kusachi, I.and Henmi, K.: "Zirconium minerals and zirconian garnet from Fuka, Okayama Prefecture, japan." Mineralogical Journal. 18-2. 54-59 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, I.and Henmi, C.and Kobayashi, S.: "Johnbaumite from Fuka, Okayama Prefecture, Japan." Mineralogical Journal. 18-2. 60-66 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, I., Henmi, C.and Kobayashi, K.: "Sibirskite from Fuka, Okayama Prefecture, Japan." Mineralogical Journal. 19-3. 109-114 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, I., Takeshi, Y., Henmi, C.and Kobayashi, S.: "Borcarite from Fuka, Okayama Prefecture, Japan." Mineralogical Journal. 19-3. 115-122 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi, I., Takechi, Y., Henmi, C.and Kobayashi, S.: "Parasibirskite, a new mineral from Fuka, Okayama Prefecture, Japan." Mineralogical Magazine. 62 (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kusachi,Isao: "Sibirdkite from Fuka,Okayama Prefecture,Japan." Mineralogical Journal. 19・3. 109-114 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kusachi,Isao: "Borcarite from Fuka,Okayama Prefecture,Japan." Mineralogical Journal. 19・3. 115-122 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kusachi,Isao: "Parasibirskite,a new mineral from Fuka,Okayama Prefecture,Japan.(発表予定)" Mineralogical Magazine.

    • Related Report
      1997 Annual Research Report
  • [Publications] Kusachi,Isao: "Johnbaumite from Fuka,Okayama Prefecture,Japan" Mineralogical Journal. 18・2. 60-66 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Henmi,Chiyoko: "Zirconium minerals and zirconian garnet from Fuka,Okayama Prefecture,Japan" Mineralogical Journal. 18・2. 54-59 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kusachi,Isao: "Sibirskite from Fuka,Okayama Prefecture,Japan" Mineralogical Journal. (発表予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] Kusachi,Isao: "Parasibirskite from Fuka,Okayama Prefecture,Japan" Mineralogical Magazine. (発表予定).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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