| 昔格达断裂（晚）新生代构造应力场浅析 |
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| 引用本文： | 张伟松,卢海峰.昔格达断裂（晚）新生代构造应力场浅析[J].大地测量与地球动力学,2017,37(10):1010-1014. |
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| 作者姓名： | 张伟松 卢海峰 |
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| 摘 要： | 以昔格达断裂带（晚）新生代昔格达组地层内发育的节理、断面等构造形迹为研究对象，通过节理玫瑰花图、节理等密度图及吴氏赤平投影等方法，反演研究区（晚）新生代的构造应力场特点。结果表明，自（晚）新生代以来，昔格达断裂带拉鲊-新久段（晚）区域主要受早期的NNE-SSW向构造挤压和晚期的NWW-SEE向挤压作用，且晚期断裂活动性质以走滑兼正断为主，并逐步确定了现在的构造形迹、地貌特征。
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| 关 键 词： | 昔格达断裂带 节理 构造地貌 构造应力场 |
Late Cenozoic Tectonic Stress Field of Xigeda Fault |
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| ZHANG Weisong,LU Haifeng.Late Cenozoic Tectonic Stress Field of Xigeda Fault[J].Journal of Geodesy and Geodynamics,2017,37(10):1010-1014. |
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| Authors: | ZHANG Weisong LU Haifeng |
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| Abstract: | In this article, we measure the tensional fracture, shear joints, and the faults developed in the Xigeda formation during the late Cenozoic. Then, we project the measurements into Wulff net with lower hemisphere, and make a rose diagram of joint and tensional fracture. The results show that horizontal principal stress is in the NNE-SSW direction during the early period and horizontal principal stress is in the NWW-SEE direction during the late period. The late stage faults are mainly strike and normal, gradually determining the structural features and landform. |
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| Keywords: | Xigeda fault zone joint structural geomorphology tectonic stress field |
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