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Clarification of preparation processes for earthquake (high-speed deformation) based on rock deformation studies

基于岩石变形研究阐明地震（高速变形）的准备过程

基本信息

批准号：
11304037
负责人：
TAKESHITA Tohru
金额：
$ 24.99万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11304037/
关键词：
high P and T rock deformation apparatus preliminary experiments sample assembly thermocouple graphite heater tungsten carbide anvils pressure measurements confining pressure medium 高温・高圧型変形実験装置圧力キャリブレーション超鋼アンビル塩銀融解点高圧型岩石変

项目摘要

This research aided by the Monbukagakushou research grant is an experimental research using a high-pressure and high-temperature deformation apparatus built by Sumitomo Heavy Industries, Ltd. Since we introduced this machine at Hiroshima University in March, 2000, we have been working on preliminary experiments for 2 years, and obtained the following results.1. In order to generate homogeneous confining pressure in the sample assembly (diameter of 23 mm and height of 30 mm), lead is placed on the top of it. However, the lead is squeezed into the hole, where a thermocouple goes through, and sometimes cut it during the experiments. Therefore, we replaced a part of the lead by pyrophyllite to solve the problem.2. We have succeeded to choose an effective thickness of a graphite ring, by which the sample can be heated above 1000 ℃.3. We first tried to measure confining pressure in the sample assembly with silver (Ag) using its well-known melting P-T relation. However, since sodium chloride, which is used for confining pressure medium, melts at lower temperatures than silver under relatively low confining pressure conditions less than 1 GPa, it is hard to control to increase the temperature to the melting point of silver. Therefore, confining pressure has been measured using the melting P-T curve of sodium chloride.4. A problem of breaking of tungsten carbide confining pressure pistons remains to be solved in the future experiments.

本研究是利用住友重工业株式会社制造的高压高温变形装置进行的实验研究，由Monbukagakushou研究基金资助。自2000年3月在广岛大学引进该机器以来，我们进行了两年的初步实验，并获得了以下结果。1.为了在样品组件（直径23 mm，高度30 mm）中产生均匀的围压，铅被放置在其顶部。然而，铅被挤压到热电偶穿过的孔中，有时在实验过程中会切断它。因此，我们用叶蜡石代替部分铅来解决这个问题.我们成功地选择了一个有效的石墨环厚度，通过这个厚度，样品可以被加热到1000 ℃以上.我们首先尝试使用其众所周知的熔化P-T关系测量具有银（Ag）的样品组件中的围压。然而，由于在小于1GPa的相对低的围压条件下，用作围压介质的氯化钠在比银低的温度下熔化，因此难以控制将温度升高到银的熔点。因此，采用氯化钠熔融P-T曲线测定围压.碳化钨围压活塞的断裂问题有待于今后的实验研究。