• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physics of the Earth and Planetary Interiors: A Journal Devoted to Obsevational and Experimerntal Studies of the Chemistry and Physics of Planetary Interiors and Their Theoretical Interpretation >Strain localization and melt segregation in deforming metapelites
【24h】

Strain localization and melt segregation in deforming metapelites

机译：变形变质岩中的应变局部化和熔体偏析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Crustal rocks commonly experience partial melting in deep parts of orogenic belts. Present concepts predict that the melt generation is directly related to shear localization, which also provides paths for the melt to migrate. Existing experimental studies, however, are insufficient to directly relate melt generation to deformation. We present the results of a series of laboratory experiments on synthetic pelites to demonstrate how and when partial melt generates with respect to strain localization during non-coaxial deformation at intermediate pressure (300 MPa) and high temperature (750 degrees C) with a constant strain rate ((gamma) over dot = 3 x 10(-4)). The study reveals that shear localization and partial melting were initially independent. Low-angle Riedel shears occurred in a brittle manner when the differential stress was at its peak. The generation of melt, which introduced ductility in the system, was associated with strong weakening of the material. The amplification of melt production (similar to 22%) was restricted to this strong weakening phase; it decreased asymptotically with larger strain. Comparison with static experiments showed that 1.7 times more partial melt generates in the dynamic experiments.
机译：地壳岩石通常在造山带的深部发生部分融化。当前的概念预测，熔体的产生与剪切局部化直接相关，这也为熔体迁移提供了路径。然而，现有的实验研究不足以将熔体的产生与变形直接相关。我们介绍了一系列合成珍珠岩的实验室实验结果，以证明在中等压力（300 MPa）和高温（750摄氏度）且恒定应变的情况下，非熔融变形过程中局部熔体如何以及何时产生局部应变率（点上的（γ）= 3 x 10（-4））。研究表明，剪切局部化和部分熔化最初是独立的。当差应力处于峰值时，低角度Riedel剪切以脆性方式发生。熔体的产生（在系统中引入延展性）与材料的强烈削弱有关。熔体产量的增加（接近22％）仅限于这种强弱化阶段。随着应变的增加，它逐渐减小。与静态实验的比较表明，在动态实验中产生的部分熔体多出1.7倍。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号