| 研究課題/領域番号 |
23KJ0536
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分17040:固体地球科学関連
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| 研究機関 | 東京大学 |
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研究代表者 |
HE Xuejing 東京大学, 理学系研究科, 特別研究員(PD)
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| 研究期間 (年度) |
2023-04-25 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
1,800千円 (直接経費: 1,800千円)
2024年度: 900千円 (直接経費: 900千円)
2023年度: 900千円 (直接経費: 900千円)
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| キーワード | deep fluorine cycle / subduction zone / hydrous minerals / hydrogen bond / high pressure |
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| 研究開始時の研究の概要 |
F subduction is facilitated by hydrous minerals and phases. In this study, O-H…F hydrogen-bonding configurations of F-doped dense hydrous magnesium silicates will be investigated under high pressure and high temperature using combined experimental methods of structural and spectroscopic analyses.
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| 研究実績の概要 |
Hydrous minerals in subducting slabs play a significant role in transporting water and halogens into the deep mantle. Studying the physicochemical properties of halogen-bearing hydrous minerals under high pressure and high temperature is an essential issue to understand the coupled water-halogen subduction. This study is aimed at systematically investigating hydrogen-bonding configurations of F-bearing mantle hydrous minerals.
The research project carried out in the last fiscal year was “Hydrogen-bonding configurations of F-doped brucite”. The crystal structure, hydrogen sublattice structure, and hydrogen-bonding geometries of F-doped brucite were determined under ambient conditions and at high pressure. The hydroxyl vibrational properties were also studied.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Difficulties were encountered in synthesizing phase A and phase E samples. The project of brucite was changed to be firstly conducted, and it moves on smoothly. Meaningful results have been obtained and were published in conferences. A manuscript is under preparation.
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| 今後の研究の推進方策 |
The research plans for the next fiscal year are as follows:
(1) Synthesizing phase A and phase E samples using the multi-anvil apparatus;
(2) Preparation and submission of the manuscript on the brucite project;
(3) Investigating elemental doping effects on the hydrogen-bonding configurations of phase A, phase E, and other mantle hydrous minerals under ambient conditions and at high pressure.
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