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Mineralogical Study on Bacterial Magnetite

Research Project

Project/Area Number 03640668
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 鉱物学(含岩石・鉱床学)
Research InstitutionNiigata University

Principal Investigator

AKAI Junji  Dept Geol.MIn., Fac, Science, assis, Prof., 理学部, 助教授 (30101059)

Co-Investigator(Kenkyū-buntansha) SATO Takaharu  Niigata University, Fac, Technology, lect., 工学部, 講師 (90196246)
YOSHIMURA Takahisa  Niigata University, Fac, Science, Professor, 理学部, 教授 (40018255)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsmagnetotactic bacteria / magnetite / electron microscope / mineral / sediments / バクテリア / 結晶学的方位 / 新潟県 / 潟湖 / 日本海 / 生体鉱物 / 環境変化 / マグネトソ-ム / 粘土鉱物 / 石こう / 電顕
Research Abstract

Much interests have been focussed on biogenic magnetites not only biologically, technologically, medical sciences but also from the aspect of earth science contaning mineralogy. They are related to geomagnetism, evolution of life, environmental change in the early stage of the earth history. However, mineralogical studies have been rare till now on. In this study, we carried out mineralogical caharacterization of biogenic magnetites both from deep sea sediments(western Pacific Ocean and Japan Sea) and from living bacteria in Niigata Region. The results showed the followings : Deep Sea sediments contain pretty large amounts of biogenic magnetite. Biogenic magnetite was found for the first time from the Japan Sea. Various shapes of the magnetite were found. The Japan Sea sediments often contain more predominant tear drop types that the other types. The crystallographic elongation direction of the tear drop type were determined by TEM.
They are often a-directions. The other mineralogical characteristics were determined. Examining living bacteria, mascagnite grain was found for the first time, Mascagnite is (NH_4)_2SO_4. They may be related metabolic products although the detail is not kyown.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] Junji Akai: "TEM study on biogenic magnetite in deep-sea sediments from the Japan Sea and Western Pacific Ocean" Journ.Electron Microscopy. 40. 110-117 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takaharu Sato: "Variation in Fe_3O_4 and CaCO_3 contents in Deep-Sea Core from the Western Equatorial Pacific" Journ.Geonag.Geochem.45. 125-132 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 佐藤高晴: "深海堆積物における磁性鉱物とCaCO_3含有率の変動" 堆積学研究会研究報告. 37. 129-130 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 赤井純治: "バクテリア起源磁鉄鉱の電子顕微鏡鉱物学研究" 電子顕微鏡. 27. 225-234 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Junji Akai: "TEM study on biogenic magnetite in deep-sea sediments from the Japan Sea and western Pacific Ocean" Journ.Electr.Microscop.vol.40. 110-117 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takaharu Sato: "Variation in Fe304 and CaC03 contents in deep-sea core from the western Equatorial Pacific" Journ.Geomag.Geochem.vol.45. 125-132 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Junji Akai: "Electron microscope- mineralogical study on bacterial magnetite (in Japanese)" Electron Microscope (Denshi Kenbikyo). vol.27. 225-234 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Junji Akai: "TEM study on biogenic magnetite in deep-sea,sediments.from the Japan Sea and Western Pacific Ocean" Journ.Electron Microscopy. 40. 110-117 (1991)

    • Related Report
      1993 Annual Research Report
  • [Publications] Takaharu Sato: "Variation in Fe_3O_4 and CaCO_3 contents in Deep-Sea Core from the western Equatorial Pacific" Journ.Geomag.Geochem.45. 125-132 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 佐藤高晴: "深海堆積物における磁性鉱物とCaCO_3の含有率の変動" 堆積学研究会研究報告. 37. 129-130 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 赤井純治: "バクテリア起源磁鉄鉱の電子顕微鏡鉱物学研究" 電子顕微鏡. 27. 225-234 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 赤井純治: "バクテリア起源磁鉄鉱の電顕鉱物学的研究" 電子顕微鏡. 28. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Junji Akai,Takaharu Sato and Shigeyasu Okusa: "TEM study on biogenic magnetite in deepーsea sediments from the Japan Sea and the Western Pacific Ocean" Journal of Electron Microscopy. 40. 110-117 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 赤井 純治,永穂 久: "バクテリア起源磁鉄鉱を含みFe・Ti鉱物,粘土鉱物を中心にした日本海海底堆積物中の鉱物組成と鉱物学的特長" 日本海中部緑部大陸棚周辺海域の海洋地質学部的研究ー平成3年度研究概要報告書. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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