| 四川龙泉山断裂带变形特征及其活动性初步研究 |
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| 引用本文： | 王伟涛,贾东,李传友,郑文俊,魏占玉.四川龙泉山断裂带变形特征及其活动性初步研究[J].地震地质,2008,30(4):968-979. |
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| 作者姓名： | 王伟涛 贾东 李传友 郑文俊 魏占玉 |
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| 作者单位： | 1. 中国地震局地质研究所,地震动力学国家重点实验室,北京,100029
2. 南京大学地球科学系,南京,210093 |
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| 基金项目： | 中国地震局地质研究所基本科研业务专项(DFIGCEA060718,DFIGCEA0607122);; 地震动力学国家重点实验室基金(LED0606);; 地震科学联合基金(B07007);; 中国地震局汶川8.0级地震科学考察项目共同资助 |
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| 摘 要： | 文中通过野外调查和地震反射剖面研究,获取了龙泉山断裂带的变形特征。龙泉山断裂带主逆冲断层位于龙泉山背斜的西翼,具有明显的分段性特征,北段与南段断层面倾向NW,断续分布;中段断层面倾向SE,形成典型的断层传播褶皱,并且断层已经沿背斜前翼膝折带的轴突破,形成贯通的突破断层。因此,中段构成了龙泉山断裂的主体。地貌对断裂活动性的响应表明龙泉山断裂早更新世—晚更新世有过一定的活动,晚更新世以来活动速率较低,且活动性具有从南向北逐渐减弱的趋势
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| 关 键 词： | 构造变形 断层传播褶皱 新活动性 龙泉山 |
| 收稿时间： | 2008-12-18 |
PRELIMINARY INVESTIGATION ON DEFORMATION CHARACTERISTICS AND ACTIVITY OF LONGQUANSHAN FAULT BELT IN SICHUAN |
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| WANG Wei-tao,JIA Dong,LI Chuan-you,ZHENG Wen-jun,WEI Zhan-yu.PRELIMINARY INVESTIGATION ON DEFORMATION CHARACTERISTICS AND ACTIVITY OF LONGQUANSHAN FAULT BELT IN SICHUAN[J].Seismology and Geology,2008,30(4):968-979. |
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| Authors: | WANG Wei-tao JIA Dong LI Chuan-you ZHENG Wen-jun WEI Zhan-yu |
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| Abstract: | Based on the field work and seismic reflection profiling data,the paper investigates the deformation characteristics of the Longquanshan Fault zone.The main thrust fault of the Longquanshan Fault belt lies in the west of the Longquanshan anticline and has different properties from northeast to southwest.In the north segment and south segment of the Longquanshan Fault,the plane of fault dips to northwest and is uncontinuous,but in the middle segment,the plane of fault dips to southeast and is continuous.Therefore,the middle part of the fault is the main segment of the Longquanshan Fault.Structural geometries of the middle segment of the fault suggest classical fault-propagation folding and the fault ruptured along different axial directions.Historical earthquakes and geomorphological response to activity of the Longquanshan Fault indicate that the fault was active from the early Pleistocene to late Pleistocene,and its activity is weak since the late Pleistocene,and gradually decreases from south to north. |
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| Keywords: | structure deformation fault-propagation folding activity Longquanshan |
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