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射线形貌术的发展：为了更好地了解晶体塑性和压力下的相变，我们利用同步辐射和Kawai型多砧高压装置开发了原位高压X射线形貌术。将单晶样品置于高压池中，用X射线CCD相机通过砧隙观察晶体的衍射斑点。虽然可观察到的斑点受到导向块/WC砧座阴影的限制，并且长的样品到相机的距离使得将斑点引导到相机非常困难，但我们可以在高压和高温条件下观察斑点。2.晶体形貌图像的观察：使用该技术对石英、橄榄石和金红石单晶进行了研究。在室温下初始压缩到几十吨的过程中，观察到斑点变宽。加热过程中，变宽的斑点恢复到原来的状态。在恒温下进一步压缩导致斑点显著增宽。样品是多晶的，可能是由于应力。虽然我们还需要进一步的技术发展，如应力控制，这项技术可以是非常有用的观察晶体缺陷和在压力和温度下的单晶转变。

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

Sulfur speciation and network structural changes in sodium silicate glasses: Constraints from NMR and Raman spectroscopy

硅酸钠玻璃中的硫形态和网络结构变化：NMR 和拉曼光谱的限制

• 发表时间: 2004
• 作者: Tomoyuki Tsujimura;X. Xue;M. Kanzaki;M. Walter
• 通讯作者: M. Walter

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

Cation order and hydrogen bonding of high-pressure phases in theAl2O3-SiO2-H2O system : An NMR and Ramanstudy

Al2O3-SiO2-H2O 体系中高压相的阳离子顺序和氢键：NMR 和拉曼研究

• 发表时间: 2006
• 期刊: Am. Miner. 91
• 作者: Xue X.;Kanzaki M.;Fukui H.;Ito E.;Hashimoto T.
• 通讯作者: Hashimoto T.

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