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惑星深部物質の熱伝導率に対する水と化学不純物の影響:地球型惑星の熱進化の探求

Research Project

Project/Area Number 21J15543
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionOkayama University

Principal Investigator

Zhang Youyue  岡山大学, 惑星物質研究所, 特別研究員(PD)

Project Period (FY) 2021-04-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
KeywordsThermal conductivity / Multi-anvil apparatus / High pressure / High temperature / Bridgmanite / Terrestrial planets
Outline of Research at the Start

Our understanding of planet relies on external observations and models with physical properties of planetary materials determined by laboratory experiments. Accurate thermal conductivity values of mantle materials are essential for good models of terrestrial planets. In this study, we will measure thermal properties of bridgmanite with different compositions and ringwoodite with different water content under high pressure and high temperature, which will reveal how impurity and water influence the thermal evolution of terrestrial planets and why the Earth is the only habitable planet nowadays.

Outline of Annual Research Achievements

Core mantle boundary heat flux, which is governed by the thermal properties of the lowermost mantle minerals, controls the generation of observed magnetic field, geological activity and thermal structure of the terrestrial planets. The purpose of this study is to understand how impurities in minerals affect the thermal evolution of terrestrial planets and to achieve the following projects: (1) Determination of pressure dependence and temperature dependence of thermal conductivity of (Fe, Al)-bearing bridgmanite (2) Determination of pressure dependence and temperature dependence of thermal conductivity of anhydrous and hydrous ringwoodite by pulse heating method.
In this fiscal year, we analyzed experimental data of project (1) obtained in the previous fiscal year. The significant decrease of pressure dependence and the absolute value of thermal conductivity of bridgmanite indicates a gradual slowing of the cooling rate of the mantle due to impurities' involvement during the secular cooling after the magma ocean solidification. We have also vigorously pursued project (2). The synthesis conditions of ringwoodite samples with desired compositions and water content have been well mastered. However, we found ringwoodite is very brittle, during cutting into thin slices, it easily breaks into pieces. After many struggles, we decide to decrease the sample diameter to get thin slices of ringwoodite. A new high-pressure thermal conductivity measurement cell for such smaller samples has been developed. The measurements of thermal conductivity of ringwoodite are now undergoing.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (5 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Effect of iron content on thermal conductivity of ferropericlase: implications for planetary mantle dynamics.2023

    • Author(s)
      Y. Zhang, T. Yoshino, M. Osako
    • Journal Title

      Geophysical Research Letters

      Volume: 51 Issue: 7

    • DOI

      10.1029/2022gl101769

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Exploration of the best reference material on anelastic measurement by cyclic loading under high pressure2022

    • Author(s)
      Chao Liu, Takashi Yoshino, Daisuke Yamazaki, Noriyoshi Tsujino, Hitoshi Gomi, Moe Sakurai, Youyue Zhang, Ran Wang, Longli Guan, Kayan Lau, Yoshinori Tange, Yuji Higo
    • Journal Title

      High Pressure Research

      Volume: 42 Issue: 1 Pages: 14-28

    • DOI

      10.1080/08957959.2021.2013834

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High-pressure experimental study of tetragonal CaSiO3-perovskite to 200 GPa2022

    • Author(s)
      Sun Ningyu、Bian Hui、Zhang Youyue、Lin Jung-Fu、Prakapenka Vitali B.、Mao Zhu
    • Journal Title

      American Mineralogist

      Volume: 107 Issue: 1 Pages: 110-115

    • DOI

      10.2138/am-2021-7913

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Simultaneous measurements of thermal conductivity and thermal diffusivity of bridgmanite and post-spinel: implications for planetary mantle dynamics and evolution2022

    • Author(s)
      Zhang Youyue, Yoshino Takashi, Osako Masahiro.
    • Organizer
      Japan Geoscience Union Meeting 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Simultaneous measurements of thermal conductivity and thermal diffusivity of bridgmanite and post-spinel: implications of mantle dynamics and evolution2021

    • Author(s)
      Zhang Youyue, Yoshino Takashi, Osako Masahiro.
    • Organizer
      Japan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2021-05-27   Modified: 2024-03-26  

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