| 2013年3月3日云南大理洱源Ms5.5地震烈度分布及发震构造 |
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| 引用本文： | 黄小龙,吴中海,蒋 瑶,田婷婷,刘艳辉.2013年3月3日云南大理洱源Ms5.5地震烈度分布及发震构造[J].地质通报,2015,34(1):135-145. |
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| 作者姓名： | 黄小龙 吴中海 蒋 瑶 田婷婷 刘艳辉 |
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| 作者单位： | 1. 中国地质科学院地质力学研究所,北京,100081
2. 中国地质科学院地质力学研究所，北京100081; 中国地质大学 北京，北京100083 |
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| 基金项目： | 中国地质调查局项目，中国地质科学院地质力学研究所基本科研业务费项目，国家自然科学基金项目 |
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| 摘 要： | 针对云南大理洱源县进行遥感解译、地质构造及地貌的初步调查,认为洱源Ms5.5地震的发震构造是点苍山西南侧NNW向的炼铁盆地东缘主边界正断层发生垂直活动的结果。区域构造与地貌分析揭示,炼铁盆地是沿通甸—巍山断裂带发育的上新世—第四纪伸展断陷盆地,据此认为通甸—巍山断裂现今的活动性主要表现为NEE向的伸展运动。引发此次地震的主边界正断层全长约40km,至少包含了3条倾向SWW的阶梯状正断层。
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| 关 键 词： | 滇西北强震区 地震烈度 炼铁断陷盆地 通甸-巍山断裂带 活动正断层 |
Seismic intensity distribution and seismogenic structure analysis of the March 3, 2013 Eryuan Ms5.5 earthquake in Dali, Yunnan Province |
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| HUANG Xiaolong,WU Zhonghai,JIANG Yao,TIAN Tingting,LIU Yanhui.Seismic intensity distribution and seismogenic structure analysis of the March 3, 2013 Eryuan Ms5.5 earthquake in Dali, Yunnan Province[J].Geologcal Bulletin OF China,2015,34(1):135-145. |
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| Authors: | HUANG Xiaolong WU Zhonghai JIANG Yao TIAN Tingting LIU Yanhui |
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| Institution: | 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
2. China University of Geosciences, Beijing 100083, China |
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| Abstract: | By combining the remote sensing interpretation with geological structures and geomorphic features of the study area, the authors have drawn the conclusion that the seismogenic structure of the earthquake resulted from the vertical activity of the main boundary normal fault that happened at the east edge of NNW-trending Liantie basin in the northwest of the Diancang Mountain. Regional structure analysis shows that Liantie basin is a faulted basin developed in Pliocene-Quaternary period along the Tongdian-Weishan faulted zone, suggesting that the present activity of Tongdian-Weishan fracture mainly finds expression in the NEE-trending extension. The main boundary normal fault controls the earthquake length of about 40km and contains at least three SWW-trending imbricated normal faults. |
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| Keywords: | northwest Yunnan meizoseismal area seismic intensity Liantie faulted basin Tongdian-Weishan faulted zone active normal fault |
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