Development of high-pressure topography and application to rheology of mantle minerals

高压地形的发展及其在地幔矿物流变学中的应用

• 批准号: 16340171
• 负责人: KANZAKI Masami
• 金额: $ 4.54万
• 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: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340171/
• 关键词: rheology; topography; mantle mineral; synchrotron radiation; dislocation; crystal; X線トポグラフィ法; 高圧鉱物; マントル; オリビン; スピネル; 相転移

1.Development of high-pressure X-ray topography : To better understand crystal plasticity and phase transformation under pressure, we developed in-situ high-pressure X-ray topography technique using synchrotron radiation and Kawai-type multi-anvil high pressure device. Single crystal sample is placed in high pressure cell, and diffraction spots from the crystal are obseved using X-ray CCD camera, through anvil gaps. Although observable spots are limited by gude-blocks/WC anvil shadows and long sample-to-camera distance makes guiding spots to the camera very difficult, we could observe spots at high-pressure and temperature conditions.2.Observations of topographic images of crystal : Single crystals of quartz, olivine and rutile have been studied using this technique. During initial compression to few tens tons at room temperature, broadening of spots were observed. During heating, broadened spot reverted to original. Further compression under constant temperataure caused significant broadening of the spots. Recovered samples were polycrystalline, possibly due to stress. Athough we still need further technical developments such as stress control, this technique can be very useful to obsereve crystal defects and transformation of single crystals under pressure and temperature.

1.高压X射线地形的开发：为了更好地理解压力下的晶体可塑性和相变，我们使用同步辐射和kawai型多型ANVIL高压设备开发了原位高压X射线地形技术。将单晶样品放置在高压电池中，并通过X射线CCD摄像头通过砧间缝隙来观察来自晶体的衍射点。尽管可观察到的斑点受到直觉障碍/wc anvil阴影的限制，而长的样品到相机距离使摄像机的指导点非常困难，但我们可以在高压和温度条件下观察到斑点。2。晶体的地形图像：使用该技术研究了石英，橄榄剂和鲁utile的单晶体。在室温下的初始压缩到几吨的初始压​​缩过程中，观察到斑点的宽阔。在加热期间，宽阔的斑点恢复为原始。在恒定温度下进一步的压缩导致斑点显着拓宽。恢复的样品是多晶，可能是由于应力造成的。 Athough我们仍然需要进一步的技术发展，例如应力控制，该技术对于观察压力和温度下的晶体缺陷和单晶的转化非常有用。

项目成果

Determination of the second critical endpoint in silicate-H2O systems using high-pressure and high-temperature X-ray radiography

使用高压高温 X 射线照相法确定硅酸盐-H2O 系统中的第二个关键终点

• 发表时间: 2004
• 期刊: Geochimca et Cosmochimca Acta 68
• 作者: K.Mibe;M.Kanzaki他4名
• 通讯作者: M.Kanzaki他4名

Depolymerization effect of water in aluminosilicate glasses : direct evidence from ^1H-^<27>A1 heteronuclear correlation NMR

铝硅酸盐玻璃中水的解聚效应：来自^1H-^27>A1异核相关NMR的直接证据

• 发表时间: 2006
• 期刊: Am.Mineral. 91
• 作者: X.Xue;M.Kanzaki
• 通讯作者: M.Kanzaki

Dissolution mechanisms of water in depolymerized silicate melts : Constraints fro 1H and 29Si NMR spectroscopy and ab inito calculations

水在解聚硅酸盐熔体中的溶解机制：1H 和 29Si NMR 光谱和从头计算的约束

• 发表时间: 2004
• 期刊: Geochimca et Cosmochimca Acta 68
• 作者: X.Xue;M.Kanzaki
• 通讯作者: M.Kanzaki

Determination of the second critical end point in silicate-H2O systems using high-pressure and high-temperature X-ray radiography.

使用高压高温 X 射线照相法测定硅酸盐-H2O 系统中的第二个关键终点。

• 发表时间: 2004
• 期刊: Geochim.Cosmochim.Acta. 68
• 作者: Mibe;K.;Kanzaki;M.;Kawamoto;T.;Matsukage;K.N.;Fei;Y.;Ono.S.
• 通讯作者: Ono.S.

Dissojution mechanisms of water in depolymerized silicate melts: Constraints from 1H and 29Si NMR spectroscopy and ab initio calculations

解聚硅酸盐熔体中水的溶解机制：来自 1H 和 29Si NMR 光谱和从头计算的约束

• 发表时间: 2004
• 期刊: Geochim.Cosmochim.Acta. 68
• 作者: X.Xue;M.Kanzaki
• 通讯作者: M.Kanzaki