Constrain on elastic properties at high P and T of the minerals of the Earth's MTZ

地球 MTZ 矿物在高 P 和 T 温度下弹性特性的约束

• 批准号: 23740339
• 负责人: GREAUX Steeve
• 金额: $ 1.75万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23740339/
• 关键词: 内部構造; sound velocities; mantle garnet; transition zone region; ザクロ石; 超音波弾性波速度測定; 高圧; 高温; マントル遷移層; 大陸地殻; 沈み込みスラブ

The P- and S-wave velocities of mantle transition zone minerals were investigated by ultrasonic interferometry in situat simultaneous high pressure and high temperature relevant to the Earth’s deep mantle. The direct comparison of our laboratory experiments with seismic observations gives an original insight into the structure of the Earth’s deep mantle. Our results showed that chemical variation in garnet can hardly explain low velocity regions, which suggest that multiple phase transformation and/or transition could be responsible for splitting of seismic waves near the 660 km depth discontinuity.

在与地球深部地幔有关的同时高温高压条件下，用超声干涉法研究了地幔过渡带矿物的纵波和横波速度。我们的实验室实验与地震观测的直接比较提供了对地球深部地幔结构的原始见解。结果表明，石榴石中的化学变化很难解释低速区，这表明多次相变和/或相变可能是造成660 km深度不连续面附近地震波分裂的原因。

项目成果

Elastic wave velocities of polycrystalline Mg_3Al_2Si_3O_12 pyrope garnet up to 20 Gpa and 1700 K.

多晶Mg_3Al_2Si_3O_12镁铝榴石石榴石的弹性波速度高达20 Gpa和1700 K。

• 发表时间: 2012
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Zou Y.;Greaux S.;Shinmei T.;Ohfuji H.;Negishi R.;Nishiyama N.;Irifune T. Whitaker M.L. and Higo Y.
• 通讯作者: Irifune T. Whitaker M.L. and Higo Y.

High pressure synthesis of transparent pyrope garnet and its sound velocity measurements.

透明镁铝榴石石榴石的高压合成及其声速测量。

• 发表时间: 2011
• 作者: Zou Y.;Irifune T.;Greaux S.;Whitaker M.L.;Shinmei T.;Nishiyama N. and Higo Y.
• 通讯作者: Nishiyama N. and Higo Y.

Ultrasonic measurements of the sound velocities in polycristalline pyrope garnet at high pressure and high temperature

高压高温下多晶镁铝榴石石榴石声速的超声测量

• 发表时间: 2012
• 作者: Zou Y.;Irifune T.;Greaux S.;Whitaker M.L.;Ohfuji H.;Shinmei T. and Higo Y.
• 通讯作者: Shinmei T. and Higo Y.

Synthesis of transparent polycrystalline pyrope and measurement of sound velocities to 18 GPa and 1700 K

透明多晶镁铝榴石的合成以及 18 GPa 和 1700 K 声速的测量

• 发表时间: 2011
• 作者: Zou Y.;Irifune T.;Whitaker M.L.;Greaux S.;Shinmei T.;Nishiyama N and Higo Y.
• 通讯作者: Nishiyama N and Higo Y.

P–V–T equation of state of Ca3Al2Si3O12 grossular garnet

• DOI: 10.1007/s00269-010-0384-1
• 发表时间: 2011-02
• 期刊: Physics and Chemistry of Minerals
• 影响因子: 1.4
• 作者: S. Gréaux;Y. Kono;N. Nishiyama;T. Kunimoto;K. Wada;T. Irifune