| 丽江7.0级大震发震机制新见 |
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| 引用本文： | 王运生,王士天,李渝生.丽江7.0级大震发震机制新见[J].西北地震学报,2000,22(4):442-446. |
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| 作者姓名： | 王运生 王士天 李渝生 |
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| 作者单位： | 成都理工学院,四川,成都,610059 |
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| 基金项目： | 地质矿产部基础重点项目!(95 0 1114)，成都理工学院地学核技术应用开发四川省重点实验室资助!(0 0 1) |
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| 摘 要： | 通过对丽江地区构造格架和丽江大震的震后调查，对丽江地震的发震环境进行了系统分析，认为丽江地震是在主压应力为近NS向区域应力场作用下，NE向丽江小金河断裂左旋错动和NW向中甸－永胜断裂右旋错动，从而导致巨甸－九五海三角形断块东部近尖端部位出现局部拉张环境，最终导致近NS向西倾的玉龙雪山东麓断层北端撕裂而发震。
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| 关 键 词： | 构造格架 地震断层 发震机制 地震烈度 发震环境 |
| 收稿时间： | 1999/8/31 0:00:00 |
| 修稿时间： | 1999-08-31 |
A NEW IDEA ON THE MECHANISM OF LIJIANG MS7.0 EARTHQUAKE |
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| WANG Yun-sheng,WANG Shi-tian and LI Yu-sheng.A NEW IDEA ON THE MECHANISM OF LIJIANG MS7.0 EARTHQUAKE[J].Northwestern Seismological Journal,2000,22(4):442-446. |
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| Authors: | WANG Yun-sheng WANG Shi-tian and LI Yu-sheng |
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| Institution: | Chengdu University of Technology, Chengdu 610059, China,Chengdu University of Technology, Chengdu 610059, China and Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | Based on the study of the regional tectonic framework and investigations of the Lijiang M S7.0 earthquake in 1996,the earthquake generating environments are systematically analyzed.Under the action of potential regional nearly NS compressive stress field,the sinistral slip of the NE strike Lijiang Xiaojinhe fracture and right lateral slip of NW strike Zhongdian Yongsheng fracture resulted in local and extension environment in the eastern triangle end of Yulongxueshan Jiuzihai faulted block, at last the north end of the nearly NS strike and dipping westwards Yulongxueshan's east piedmont fault was ripped up and the Lijiang M S7.0 earthquake happened. |
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| Keywords: | Tectonic framework Seismic fault Lijiang M S7 0 earthquake Earthquake mechanism |
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