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Direct observation of the fractured surfaces of minerals produced at middle-low Crust and upper Mantleer

Research Project

Project/Area Number 17K05679
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geology
Research InstitutionShizuoka University

Principal Investigator

Masuda Toshiaki  静岡大学, 防災総合センター, 客員教授 (30126164)

Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsマイクロブーディン構造 / 長柱状鉱物 / 破断面 / レーザー顕微鏡 / FIB–SEM / 核形成 / 結晶成長 / FIB-SEM / FIBーSEМ / 石英 / 方解石 / オリビン / 構造地質 / テクトニクス
Outline of Final Research Achievements

(1) Fractured surfaces of amphibole microboudins in a marble and a metachert were tentatively observed with a laser microscope and FIB-SEM, respectively. Although the fractured surfaces are partly concealed by newly overgrown amphibole grains on the fractured surfaces after the microboudinage, original fractured surfaces show smoothly undulated, not serrated morphology in most places. (2) I published a paper that proposes a new kinetic model of metamorphic minerals based on systematically changeable activation volume for the nucleation under the influence of normal stress in non-hydrostatic stress state in an international journal (Masuda, T. and Omori, Y., 2021. A kinetic model of oriented nucleation under nonhydrostatic stress: implications for the preferred orientation of columnar and platy minerals in metamorphic rocks. Journal of Structural Geology).

Academic Significance and Societal Importance of the Research Achievements

(1)角閃石マイクロブーディンの破断面の観察では、地下深部での破断のメカニズムを考察する上で基本的情報を提供した事になる。石英や方解石が流動するような温度圧力環境で微小に起こる角閃石の破断の実態を知ることで、地下深部での岩石の変形への理解が進み、地震発生メカニズムの理解につながる基礎知識の一つを提供できたと考えている。(2)核形成の活性化体積が応力に依存するというモデルは、応力場での結晶の異方的成長の新しい方向性を示しており、今後の変成鉱物の選択配向の議論が活性化する土台を築けたと考える。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (3 results)

  • [Journal Article] A kinetic model of oriented nucleation under nonhydrostatic stress: Implications for the preferred orientation of columnar and platy minerals in metamorphic rocks2021

    • Author(s)
      Masuda Toshiaki、Omori Yasutomo
    • Journal Title

      Journal of Structural Geology

      Volume: 146 Pages: 104275-104275

    • DOI

      10.1016/j.jsg.2020.104275

    • NAID

      130007892142

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loop energy: A useful indicator of the hardness of minerals from depth-sensing indentation tests2018

    • Author(s)
      Masuda Toshiaki、Omori Yasutomo、Sakurai Ryoko、Miyake Tomoya、Yamanouchi Mirai、Harigane Yumiko、Okamoto Atsushi、Michibayashi Katsuyoshi
    • Journal Title

      Journal of Structural Geology

      Volume: 117 Pages: 96-104

    • DOI

      10.1016/j.jsg.2018.09.004

    • NAID

      120006547578

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Application of the inverse Batschelet distribution to measuring the preferred orientation of tourmaline grains2017

    • Author(s)
      Matsumura Tarojiro、Kuwatani Tatsu、Ando Yasunobu、Masuda Toshiaki
    • Journal Title

      Journal of Structual Geology

      Volume: - Pages: 288-293

    • DOI

      10.1016/j.jsg.2017.12.011

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The relationship between the proportion of microboudinaged columnar grains and far–field differential stress: A numerical model for analyzing paleodifferential stress2017

    • Author(s)
      Tarojiro Matsumura, Tatsu Kuwatani, Toshiaki Masuda
    • Journal Title

      Journal of Mineralogical and Petrological Sciences

      Volume: 112 Issue: 1 Pages: 25-30

    • DOI

      10.2465/jmps.160711

    • NAID

      130005461020

    • ISSN
      1345-6296, 1349-3825
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 変成岩の面構造:ほぼ未開拓の大荒野2023

    • Author(s)
      増田俊明・酒井瑞帆・大森康友・楠賢司
    • Organizer
      変成岩などシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 盤上鉱物の携帯選択配向の変形による改変:マーチモデルを用いた2次元シミュレーション2022

    • Author(s)
      増田俊明・大森康友
    • Organizer
      日本地質学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 応力場での変成鉱物の核形成モデル:板状鉱物及び柱状鉱物の選択配向の予測2019

    • Author(s)
      増田俊明、大森康智
    • Organizer
      日本地質学会第126年学術大会(山口大会)
    • Related Report
      2019 Research-status Report

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Published: 2017-04-28   Modified: 2024-01-30  

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