国際的パルス中性子施設と巨大高圧相単結晶合成技術による地球深部水の研究

利用国际脉冲中子装置和巨型高压相单晶合成技术研究地球深层水

• 批准号: 15J03633
• 负责人: プレジャブ ナランゴー
• 金额: $ 1.22万
• 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: 2015
• 资助国家: 日本
• 起止时间: 2015-04-24 至 2017-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15J03633/
• 关键词: neutron diffraction; mantle transition zone; single crystal; hydrous ringwoodite; hydrous wadsleyite

We conducted series of measurements of quasi-elastic neutron scattering for dense hydrous magnesium silicate phase E. These were made several times during this period until February 2017. The sample with about 250 mg in total mass was successfully synthesized at 15 GPa pressure by using Kawai-type apparatus at Okayama University. The measurement was conducted at DNA spectrometer at J-PARC. The method was applied for observing hydrogen diffusion in atomic scale in the host mineral structure. We measured it at variable temperature ranges up to 480 K. We successfully observed local motions of hydrogen in the crystal structure of phase E. On the other hand, I also joined several conferences. I presented my results of structure refinements for hydrous ringwoodite and hydrous wadsleyite. The result for hydrous wadsleyite by single crystal neutron diffraction has been published in Scientific Reports in 2016 October. The result for hydrous ringwoodite by single crystal neutron diffraction (obtained previously in 2015 at TOPAZ spectrometer at Spallation Neutron Source, Oak Ridge National Laboratory) has been analyzed and also presented in these conferences. Finally I wrote my Ph.D dissertation and submitted it in early March.

我们对致密含水硅酸镁相E进行了一系列准弹性中子散射测量。在2017年2月之前的这段时间里，这些都做了几次。利用冈山大学的Kawai型装置在15 GPa压力下成功合成了总质量约250 mg的样品。在J-PARC的DNA光谱仪上进行测量。该方法适用于观察氢扩散在原子尺度上的主机矿物结构。我们在高达480 K的可变温度范围内测量它。我们成功地观察到氢在E相晶体结构中的局域运动。此外，我还参加了几个会议。我介绍了我对含水灵伍德石和含水沃兹斯利石的结构细化结果。通过单晶中子衍射获得的含水wadsleyite的结果已于2016年10月发表在Scientific Reports上。通过单晶中子衍射获得的含水林伍德石的结果（之前在2015年在橡树岭国家实验室Sputron中子源的黄玉光谱仪上获得）已被分析并在这些会议上发表。最后，我写了我的博士论文，并于3月初提交。

项目成果

Structure analysis of hydrous ringwoodite by single crystal neutron diffraction

单晶中子衍射分析水合尖晶石的结构

• 发表时间: 2016
• 作者: Narangoo Purevjav;Takuo Okuchi;Xiaoping Wang and Christina Hoffmann
• 通讯作者: Xiaoping Wang and Christina Hoffmann

Hydrogen Site Analyses of Dense Hydrous Mantle Minerals by Pulsed Neutron Powder Diffraction

通过脉冲中子粉末衍射对致密含水地幔矿物的氢位点进行分析

• DOI: 10.4131/jshpreview.26.140
• 发表时间: 2016
• 期刊: The Review of High Pressure Science and Technology
• 作者: 井尻 暁;土岐 知弘;安慶名 昴;星野 辰彦;町山 栄章;芦 寿一郎;稲垣 史生;Hitoshi Mukougawa;奥地拓生・富岡尚敬・プレジャブナランゴー
• 通讯作者: 奥地拓生・富岡尚敬・プレジャブナランゴー

Hydrogen site analysis of hydrous ringwoodite in mantle transition zone by pulsed neutron diffraction

• DOI: 10.1002/2014gl061448
• 发表时间: 2014-10
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: N. Purevjav;T. Okuchi;N. Tomioka;J. Abe;S. Harjo

オークリッジ国立研究所(米国)

橡树岭国家实验室（美国）

Single crystal neutron diffraction of hydrous wadsleyite and the reason of sensitivity difference for hydration between upper and lower mantle transition zones

含水硅锰矿的单晶中子衍射及上、下地幔过渡带水化敏感性差异的原因

• 发表时间: 2016
• 作者: N. Purevjav;T. Okuchi;N. Tomioka;X. Wang;and C. Hoffmann
• 通讯作者: and C. Hoffmann