| 麻城1932年6级地震孕震构造机制探讨 |
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| 引用本文： | 雷东宁,蔡永建,余松,乔岳强,吴建超.麻城1932年6级地震孕震构造机制探讨[J].国际地震动态,2012(7):20-24. |
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| 作者姓名： | 雷东宁 蔡永建 余松 乔岳强 吴建超 |
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| 作者单位： | 1. 中国地震局地震研究所,地震大地测量重点实验室,武汉430071;武汉地震工程研究院,武汉430071
2. 中国地震局地震研究所,地震大地测量重点实验室,武汉430071;武汉地震工程研究院,武汉430071;中国地质大学地球科学学院,武汉430074 |
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| 基金项目： | 中国地震局地震研究所基金 |
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| 摘 要： | 通过收集前人有关地震地质、地球物理等资料,在综合分析的基础上,研究了麻城1932年6级地震的发震构造,并探讨了其孕震构造机制。研究认为,麻城—团风主干断层为该地震的发震构造,次级断层受主干断层控制;震中区处于区域重力、磁力异常区,区内存在低阻层;麻城6级地震是在区域NEE向现代构造应力场的作用下,壳幔尺度垂直隆升共同作用的浅源地震事件;壳幔深度的上隆及NEE向的构造主压应力分别成为该区处于伸展构造环境和具有剪切走滑性质的主要动力来源。
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| 关 键 词： | 麻城6级地震 发震构造 孕震构造机制 构造应力场 |
A study on seismogenic tectonic model of Macheng M6 earthquake in 1932 |
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| Lei Dongning
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Cai Yongjian
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Yu Song
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Qiao Yueqiang
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Wu Jianchao.A study on seismogenic tectonic model of Macheng M6 earthquake in 1932[J].Recent Developments in World Seismology,2012(7):20-24. |
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| Authors: | Lei Dongning Cai Yongjian Yu Song Qiao Yueqiang Wu Jianchao |
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| Institution: | 1,2) 1) Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA, Wuhan 430071,China 2) Institute of Earthquake Engineering of Wuhan,Wuhan 430071,China 3) Faculty of Earth Science,China University of Geosciences,Wuhan 430074,China |
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| Abstract: | Based on the previous seismological,geological and geophysical data,seismogenic structure and mechanism of the Macheng M6 earthquake occurred in 1932 were studied.It is concluded that the seismogenic structure of the earthquake is the Macheng-Tuanfeng main fault,by which some branch faults are controlled.The focal area is characterized by an anomaly of regional gravity and magnetic field.There exists a layer with low-resistivity in the crust in this area.The dynamic source,which leads to the tensional and right-lateral strike slipping motion of the fault,derives from the lifting of the crust and mantle and the principal compressional stress along NEE tectonic. |
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| Keywords: | Macheng M6 earthquake seismogenic structure seismogenic tectonic model tectonic stress field |
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