Rheology of post-perovskite and the lowermost lower mantle inferred from high pressure experiments

从高压实验推断出后钙钛矿和最底层下地幔的流变学

• 批准号: 21340128
• 负责人: YAMAZAKI Daisuke
• 金额: $ 11.9万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21340128/
• 关键词: ポストペロフスカイト; レオロジー; 粒径; 粘性率; 異方性; 相転移機構; 選択配向; 高圧実験; ペロフスカイト; 高圧; 相転移

Post-perovskite is considered to be the dominant phase in the lowermost lower mantle(D "layer). Therefore, we investigated rheology of post-perovskite associated with the phase transformation from perovskite to post-perovskite by means of high pressure experiments to understand the dynamics of the earth's interior. Grain size is a key parameter which controls the mechanism of deformation and viscosity of constituting materials. Based on present experimental results, significant grain size reduction occurs during phase transformation and hence viscosity reduction is expected in the Dlayer.

后钙钛矿被认为是最低下地幔（D“层）中的主要相。因此，我们通过高压实验研究了与从钙钛矿到后钙钛矿的相变相关的后钙钛矿的流变学，以了解地球内部的动力学。晶粒尺寸是控制组成材料的变形机制和粘度的关键参数。根据目前的实验结果，在相变期间发生显着的粒度减小，因此预计Dlayer中的粘度会降低。

项目成果

Single crystal growth of wadsleyite

• DOI: 10.2138/am.2009.3150
• 发表时间: 2009-08
• 期刊: American Mineralogist
• 影响因子: 3.1
• 作者: A. Shatskiy;K. Litasov;Takuya Matsuzaki;K. Shinoda;D. Yamazaki;A. Yoneda;E. Ito;T. Katsura

Electrical conductivity of mantle peridotite at the uppermost lower mantle condition

下地幔最上层条件下地幔橄榄岩的电导率

• 发表时间: 2010
• 期刊: J. Phys.: Conference Series
• 作者: Yoshino;T.;Katsura;T.;Yamazaki;D.;Ito;E.
• 通讯作者: E.

High pressure generation and investigation of the spin transition of ferropericlase(Mg0. 83, Fe0. 17) 0

方镁石(Mg0.83,Fe0.17)0的高压产生及自旋跃迁研究

• 发表时间: 2010
• 期刊: J. Phys.: Conference Series
• 作者: Ito;E.;Yoshino;T.;Yamazaki;D.;Shatzkiy;A. S.;Shun;S.;Guo;X.;Katsura;T.;Higo;Y.;Funakoshi;K.
• 通讯作者: K.

High pressure generation and investigation of the spin transition of ferropericlase (Mg0.83Fe0.17)O

方镁石 (Mg0.83Fe0.17)O 的高压产生和自旋跃迁研究

• DOI: 10.1088/1742-6596/215/1/012099
• 发表时间: 2010
• 作者: E Ito;T Yoshino;D Yamazaki;A S Shatskiy;S Shan;X Guo;T Katsura;Y Higo;K Funakoshi
• 通讯作者: K Funakoshi

High pressure generation using scaled-up Kawai-cell

• DOI: 10.1016/j.pepi.2011.08.001
• 发表时间: 2011-11
• 期刊: Physics of the Earth and Planetary Interiors
• 影响因子: 2.3
• 作者: A. Shatskiy;T. Katsura;K. Litasov;Anastasia Shcherbakova;Y. Borzdov;D. Yamazaki;A. Yoneda;E. Ohtani;E. Ito