Strain analysis of minerals

该项目的目的是检测天然矿物的内部应变，并澄清该菌株的来源。在本项目中，开展了以下三个方面的研究。应变对矿物精细结构的影响：在钻石等天然矿物中进行了这种影响。结果表明：(1)天然钻石中的应变分布在溶解后发生生长的位置附近，表明生长处于较高的不平衡条件下。(2)显示光学异常的天然翡翠属于三斜对称群。(3)单斜辉石的高-低转变为马氏体相变的非热型。(4)铝硅酸盐之间的界面不是由应变控制的，而是由界面能控制的。球粒陨石的冲击变形：球粒陨石及其粉末被冲击压缩。熔化程度随材料孔隙率的增大而增大。根据实验结果，类彗星的激波撞击可能是球粒陨石的起源。岩石变形：被认为是地震化石的拟玄武岩是通过变形角砾岩熔融过程形成的。

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.