| 四川龙泉山断裂带及其活动性与潜在地震危险性讨论 |
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| 引用本文： | 黄伟,江娃利.四川龙泉山断裂带及其活动性与潜在地震危险性讨论[J].西北地震学报,2012,34(1):50-56. |
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| 作者姓名： | 黄伟 江娃利 |
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| 作者单位： | 中国地震局地壳应力研究所,北京,100085 |
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| 基金项目： | 中国地震局地壳应力研究所基本科研业务专项 |
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| 摘 要： | 龙泉山构造带是四川盆地内川西强烈断陷区和川中稳定隆起区之间的一条区域性断裂.2008年汶川地震后该断裂带未来的强震潜势备受关注.本文对该断裂带的展布、晚第四纪活动性、深部构造形成机制以及断裂带未来的地震危险潜势进行了讨论.断裂带北段位于德阳东侧龙泉山脉西缘;龙泉山脉中段的山体两翼存在断裂;断裂带的南段以向西倾斜的断裂为主.这些断裂在晚更新世以来曾有活动,前人阶地调查显现该断裂带全新世存在活动.考虑到该断裂带未来的地震潜势评估,值得对该断裂带的活动性及断裂带深部构造和运动方式开展进一步的调查.
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| 关 键 词： | 四川盆地 龙泉山构造带 晚第四纪活动 前陆盆地前隆 未来地震潜势 |
Discussion on the Late Quaternary Activity and Earthquake Risk Potential of Longquanshan Fault in Sichuan |
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| HUANG Wei,JIANG WA-li.Discussion on the Late Quaternary Activity and Earthquake Risk Potential of Longquanshan Fault in Sichuan[J].Northwestern Seismological Journal,2012,34(1):50-56. |
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| Authors: | HUANG Wei JIANG WA-li |
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| Institution: | (Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China) |
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| Abstract: | The Longquanshan fault zone is a regional fault which is located between strongly concaved block of western Sichuan basin and stably uplifted block of middle Sichuan.After the Wenchuan earthquake in 2008,the earthquake risk potential of this fault has been greatly concerned.In this paper,the distribution,late Quaternary activity,deep structure and formation mechanism of Longquanshan fault zone are discussed.It’s possible that the north segment section of Longquanshan fault zone is distributed along the west side of Lonquanshan mountain at east of Deyang city.The fault emerges in both wings of anticline on the middle segment of the fault;and the south segment of the fault is mainly W-dipping.The fault has been active since Late Pleistocene.The previous terrace investigation demonstrated that the fault zone even actived in Holocene.Considering the evaluating the earthquake risk potential of this fault,further investigationg on the activity time,deep structure and movement mode of the fault zone is deserved to be done. |
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| Keywords: | Sichuan basin Longquanshan tectonic belt The late Quaternary activity Forland basin swell Earthquake risk potential |
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