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

水和化学杂质对深层行星材料导热率的影响：探索类地行星的热演化

• 批准号: 21J15543
• 负责人: Zhang Youyue
• 金额: $ 0.96万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-28 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21J15543/
• 关键词: Thermal conductivity; Multi-anvil apparatus; High pressure; High temperature; Bridgmanite; Terrestrial planets

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.

核心地幔边界热通量受最低地幔矿物的热性质控制的，它控制着观察到的磁场，地质活性和陆地行星的热结构的产生。这项研究的目的是了解矿物质中的杂质如何影响陆地行星的热演化并实现以下项目：（1）确定压力的依赖性和温度依赖性（Fe，al）bridgmanite（fe，Al） - 含量（2）确定压力和温度依赖性的脉冲液的液压测定能力的压力依赖性和温度依赖性的脉冲液的热量供应，我们的脉冲液的热量数据依赖于脉冲的测量，并确定脉冲的液压供应量。 （1）在上一个财政年度获得。压力依赖性的显着降低和bridgmanite导热率的绝对值表明，由于岩浆海洋固化后的世俗冷却期间杂质的参与，壁炉冷却速率的逐渐减慢。我们还大力追求项目（2）。带有所需成分和水含量的林木样品的合成条件已得到很好的掌握。但是，我们发现Ringwoodite非常脆弱，在切成薄片时，它很容易分解成碎片。经过多次挣扎，我们决定减少样品直径以获得薄片的林木片。已经开发了一个新的高压导热率测量电池，用于此类较小的样品。现在正在进行Ringwoodite热导率的测量。

项目成果

Exploration of the best reference material on anelastic measurement by cyclic loading under high pressure

• DOI: 10.1080/08957959.2021.2013834
• 发表时间: 2021-12-10
• 期刊: HIGH PRESSURE RESEARCH
• 影响因子: 2
• 作者: Liu, Chao;Yoshino, Takashi;Higo, Yuji
• 通讯作者: Higo, Yuji

High-pressure experimental study of tetragonal CaSiO3-perovskite to 200 GPa

四方CaSiO3-钙钛矿200 GPa高压实验研究

• DOI: 10.2138/am-2021-7913
• 发表时间: 2021-12
• 期刊: American Mineralogist
• 影响因子: 3.1
• 作者: Ningyu Sun;Hui Bian;Youyue Zhang;Jung-Fu Lin;Vitali B. Prakapenka;Zhu Mao
• 通讯作者: Zhu Mao

Effect of iron content on thermal conductivity of ferropericlase: implications for planetary mantle dynamics.

铁含量对方镁石热导率的影响：对行星地幔动力学的影响。

• DOI: 10.1029/2022gl101769
• 发表时间: 2023
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Y. Zhang;T. Yoshino;M. Osako
• 通讯作者: M. Osako