Strain analysis of minerals

该项目的目的是检测天然矿物的内部应变，并澄清应变的来源。在这个项目中，主要进行了以下三个方面的研究。应变对矿物细构的影响：对天然矿物如钻石的影响进行了研究。研究结果如下：(1)天然金刚石的应变分布在溶解后生长的位置周围，表明生长是在较高的不平衡条件下进行的。(2)天然祖母绿呈光学异常，属于三斜对称群。(3)斜辉石的高-低转变是马氏体转变的非热型。(4)铝硅酸盐之间的界面不受应变的控制，而受界面能的控制。球粒陨石的冲击变形：球粒陨石及其粉末被冲击压缩。熔融程度随材料孔隙率的增加而增加。根据实验结果，我们认为类似彗星的天体的冲击撞击可能是球粒陨石的起源。岩石变形：揭示了变形角化熔融过程形成的伪速长石，被认为是地震的化石。

The aim of the project is to detect of internal strain of natural minerals and to clarify the origin of the strain. In the project, the following three researches were carried out.1. Effect of strain to fine textures of minerals : The effect in natural minerals such as diamonds was carried out. The results are as follows ; (1) Strain in natural diamonds distributes around the positions where the growth took place after the dissolution, indicating the growth under relatively high disequilibrium conditions. (2) Natural emerald showing the optical anomaly belongs to the triclinic symmetry group. (3) High-low transition of clinopyroxene is an athermal type of the martensitic transition. (4) Interfaces between aluminosilicates is controlled not by the strain but by interfacial energy.2. Shock-deformation of chondrite : Chondrites and its powders were shock-compressed. The degree of melting increases with increasing of porosity of the materials. Based on the experimental results, shock-impacts of comet-like bodies are suggested to be the origin for chondrites.3. Deformation of rocks : Pseudo-tachylite, which is considered to be fossil of earth quakes, is revealed to form through deformation-brecciation-melting processes.