塔里木盆地库车坳陷中新生代构造应力场分析

盆地覆盖区古构造应力场分析一直是盆地动力学研究的一个难题.本文在对库车坳陷不同层位地层进行系统取样的基础上,初步探讨了用岩石磁组构恢复古构造应力场最大主压应力方向,测试结果与构造变形分析相一致;用岩石声发射测量系统筛分不同构造运动期次,并确定各期次有效最大主压应力大小,研究结果表明,测试构造期次与研究区构造地质分析期次基本吻合.

An Analysis of the Mesozoic-Cenozoic Tectonic Stress Field in Kuqa Depression, Tarim Basin

The analysis of the paleotectonic stress field in the overburden of a basin is always a difficult problem in basin dynamic research. Based on systematic sampling of different layers in the study area, the authors tentatively used rock magnetic fabrics to determine the maximum principal compressive stress direction of a paleotectonic stress field. The measured results have a good agreement with the structural deformation analysis. Rock acoustic emission was also used to systematically screen different tectonic movements in this area and calculate the maximum principal compressive effective paleo-stress magnitude of every movement. The research results show that the rock acoustic emission can be used to measure the tectonic movements, with a basic agreement with the structural geological analysis and the paleo-stress values.