| 澜沧7.6级地震形变带 |
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| 引用本文： | 俞维贤,柴天俊.澜沧7.6级地震形变带[J].地震地质,1991,13(4):343-352. |
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| 作者姓名： | 俞维贤 柴天俊 |
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| 作者单位： | 云南省地震局，云南省地震局，云南省地震局 昆明 650204，昆明 650204，昆明 650204 |
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| 摘 要： | 澜沧7.6级地震形变带主要以地震裂缝带的形式出现,未发现有类似耿马7.2级地震的地震断层。裂缝主要沿木戛断裂带和大塘子断裂带分布,构造地裂缝的性质有左旋和右旋。对构造地裂缝实测资料及现场的综合分析认为:澜沧7.6级地震的主压应力方向应为近南北向至北北东向,地震时断层活动主要以右旋为主,左旋地裂缝是在断层突发性的右旋错动下的产物
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| 关 键 词： | 云南 澜沧地震 断裂 地震形变带 地裂缝 |
DEFORMATION ZONE OF M = 7.6 LANCHANG EARTHQUAKE |
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| Yu Wei-xian,Cai Tian-jun and Hou Xue-ying.DEFORMATION ZONE OF M = 7.6 LANCHANG EARTHQUAKE[J].Seismology and Geology,1991,13(4):343-352. |
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| Authors: | Yu Wei-xian Cai Tian-jun and Hou Xue-ying |
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| Abstract: | The seismic deformation zone of M 7.6 Lancang earthquake in 1988 is mainly composed of a series of surface ruptures and distributed along the Muga and Datangzi faults, The mechanical property of right-lateral shear of the deformation zone is analysed. But some segments of the zone exhibit their left-lateral shearing movement.Based on the field investigation and comprehensive analysis of data, it is considered that the axis of principal stress for the event is in NS-NNE direction. The seismic faulting of the event should represent a right-lateral displacement. The ground cracks which exhibit left-lateral displacement were formed by right-lateral displacement of faults. |
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| Keywords: | Yunnan Lanchang earthquake Fault Deformation zone Groud fisssure |
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