| 元谋断裂带（晚）新生代构造应力场浅析 |
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| 引用本文： | 卢海峰,张路.元谋断裂带（晚）新生代构造应力场浅析[J].震灾防御技术,2013,8(2):125-134. |
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| 作者姓名： | 卢海峰 张路 |
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| 作者单位： | 1. 中国地震局地壳应力研究所(地壳动力学重点实验室),北京100085;中国地质大学地球科学与资源学院,北京100083
2. 中国地震局地壳应力研究所(地壳动力学重点实验室),北京,100085 |
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| 基金项目： | 中国地震局公益性科研院所基本科研业务专项（ZDJ2011-04）,青年科学基金（41002074）,元谋断裂1:5万地质填图共同资助 |
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| 摘 要： | 活动断裂带是形迹组合、构造地貌特征及力学性质相呼应的构造体系.以元谋断裂带(晚)新生代地层内发育的构造透镜体、剪节理、张性裂隙等形迹组合及其发育序列为研究对象,通过吴氏网下半球赤平投影、节理玫瑰花图及张性裂隙性质分析等研究方法,推测元谋断裂带自(晚)新生代以来主要受早期的北北东-南南西向和晚期(元谋运动之后,约80万年)的北北西-北西西向水平主压应力场作用,改变了构造活动性质并确立了现在的构造形迹、地貌.
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| 关 键 词： | 活动断裂带 形迹组合 新生代地层 发育序列 水平主压应力场 |
| 收稿时间： | 2012/12/29 0:00:00 |
Tectonic Stress Field on the Yuanmou Fault Zone during the (Late) Cenozoic |
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| Lu Haifeng and Zhang Lu.Tectonic Stress Field on the Yuanmou Fault Zone during the (Late) Cenozoic[J].Technology for Earthquake Disaster Prevention,2013,8(2):125-134. |
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| Authors: | Lu Haifeng and Zhang Lu |
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| Institution: | Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China ; School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China |
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| Abstract: | The feature of active fault zone is generally characterized by echoing each other among structure assemblages, landform and mechanical properties. In this study we measured the tectonic lenticularbodies, shear joints and tensional fracture developed in the fault zone in the field, and then we projected the measurements into Wulff Net with lower hemisphere, and made rose diagram of joint and tensional fracture. The studied results show that horizontal principal stress is in the NNE-SSE direction during early period and horizontal principal stress is in the NNW-NWW direction during late period (after Yuanmou Motion, about 0.8Ma ago). Such stress field has the great effect on not only the activity of Yuanmou fault, but also the current characteristics of tectonics and landform. |
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| Keywords: | Active fault zonel Structure assemblagess Cenozoic stratigraphicl Developing sequence Horizontal principal stress field |
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