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Structure & physical Properties of Earth Interior at High Pressure

结构

基本信息

批准号：
08044082
负责人：
YAMANAKA Takamitsu
金额：
$ 3.58万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08044082/
关键词：
Earth interiors X-ray diffraction study under high pressure Crystal structure and physical properties Plastic and elastic deformation bulk moduli and elastic velocity rheology and solid mobility Synchrotron radiation science molecular dynami

项目摘要

In order to comprehend the dynamics of theology, earth quake and subduction of slab in the earth crust or mantle, we investigate the phase transition and structure change of earth materials under high temperature and pressure. We have also proceed the collaboration works concerning the solid state earth science and high pressure technology with German crystallographers and mineralogists using synchrotron and neutron diffraction.It has been known that structure and texture changes of minerals composed of polycrystalline materials under stress field induces the solid mobility. For the purpose of understanding the above mentioned mechanical process, quantitative kinetic investigations has been undertaken by the simulation of physco-chemical process found in the earth interiors as a function of temperature, pressure, partial pressure, electric field, magnetic field and chemical potential.Our investigations are worth while not only for science intelligence of material structure and texture under high pressure but also for the suggestions to the analysis of the mechanism of the earth crust dynamics and mantle science.The present research has provided the great influence to the collaboration between German and Japanese mineral science.The following research projects have been performed :(1) Structure change with ascent and descent of earth interiors (precise measurement of intracrystalline proliferation and computer simulation as a function of pressure-temperature-time.)(2) Analysis of plastic and elastic deformation of crystal lattice under high pressure and temperature.(3) Mobility of earth materials as functions of such deriving forces as bulk modulus, viscosity, thermal expansibity, elastic velocity.

为了了解地壳或地幔中的流变学、地震和板块俯冲的动力学，我们研究了地球物质在高温高压下的相变和结构变化。我们还与德国晶体学家和矿物学家进行了有关固体地球科学和高压技术的合作工作，利用同步辐射和中子衍射，已知由多晶材料组成的矿物在应力场作用下结构和织构的变化引起固体的流动性。为了理解上述力学过程，已经通过模拟地球内部的物理化学过程作为温度、压力、分压、电场、磁场和化学势。我们的研究不仅对高压下材料结构和纹理的科学情报有价值，而且对高压下材料结构和纹理的建议也有价值地壳动力学和地幔科学机制的分析。目前的研究对德国和日本矿物科学的合作产生了重大影响。已开展了以下研究项目：（1）地球内部上升和下降的结构变化（晶内扩散的精确测量和计算机模拟作为压力-温度-时间的函数。）(2)高温高压下晶格的塑性和弹性变形分析。(3)地球物质的流动性作为体积模量、粘度、热膨胀性、弹性速度等派生力的函数。