| 高温高压下闪长岩弹性纵波速度的实验研究 |
| 点此下载全文 |
| 引用本文：刘巍,杜建国,白利平,郭捷.2004.高温高压下闪长岩弹性纵波速度的实验研究[J].地球学报,25(6):683-687. |
| DOI： |
| 摘要点击次数: 2321 |
| 全文下载次数: 1965 |
|
| 基金项目:国家自然科学基金项目(编号:10299040)，青年地震联合基金项目(编号:603007) |
|
| 中文摘要:利用YJ-3000吨压力机，在1．0GPa、室温至1000℃条件下采用超声波脉冲透射-反射法就位测量了闪长岩的纵波速度(VP)，并在720℃、780℃、870℃和980℃获得了4个实验产物。在1．0GPa恒定压力下，闪长岩的VP随温度升高呈线性缓慢降低；当温度大于750℃时，波速开始大幅度下降。显微镜观察和电子探针鉴定结果表明：在不同温度下闪长岩内部的矿物发生了不同程度的脱水和部分熔融等反应。波速随温度升高呈线性和非线性下降，主要是由于在高温高压条件下岩石内部矿物发生热膨胀、脱水和部分熔融等反应引起了岩石 |
| 中文关键词:高温高压实验 纵波速度 脱水作用 岩石结构 |
| |
| Experimental Reserches on Compressional Elastic Wave Velocities of Diorite at High Pressures and Temperatures |
|
|
| Abstract:Ultrasonic laboratory measurements of compressional velocities (V P) were carried out for diorite at 1.0 GPa from room temperature to 980 ℃ in a multi-anvil pressure apparatus. Four products were obtained at the temperatures of 720 ℃、780 ℃、870 ℃ and 980 ℃ respectively. At the constant pressure of 1.0 GPa, the V P showed an almost linear decrease with the increasing temperature. At temperature beyond 750 ℃, the V P began to decrease remarkably. The analysis result under a microscope and with an electron microprobe analyzer proves that the minerals in diorite were dehydrated and partially melted to various extents at different temperatures. The linear and nonlinear declines of velocity are attributed to the changes of rock fabrics and components in diorite due to thermal expansion of minerals, dehydration and partial melting. |
| keywords:high pressure and temperature experiment compressional wave velocity dehydration rock fabric |
| 查看全文 查看/发表评论 下载PDF阅读器 |
