| 恩施断裂中段第四纪活动特征与位移速率 |
| |
| 引用本文： | 蔡永建,雷东宁,李恒,乔岳强,吴建超,Wu Jianchao.恩施断裂中段第四纪活动特征与位移速率[J].大地测量与地球动力学,2011,31(1):39-43. |
| |
| 作者姓名： | 蔡永建 雷东宁 李恒 乔岳强 吴建超 Wu Jianchao |
| |
| 作者单位： | 1)中国地震局地震研究所,武汉 4300712)武汉地震工程研究院,武汉 4300713)中国地质大学(武汉)地球科学学院,武汉 430074 |
| |
| 基金项目： | 中国地震局地震研究所所长基金(IS200756048) |
| |
| 摘 要： | 对恩施断裂中段构造地貌、断裂剖面与洪积扇变形的分析表明,断裂在第四纪活动明显,以正倾滑兼右旋走滑为特征.根据洪积扇位错的水平距离、垂直高差以及形成时代,估算出断裂在中更新世晚期至晚更新世早、中期的右旋运动速率为0.43～0.5 mm/a,垂直运动速率0.07～0.17 mm/a.
|
| 关 键 词： | 恩施断裂 滑动速率 第四纪 构造地貌 洪积扇 |
ACTIVITY FEATURE AND SLIP RATE OF MIDDLE SEGMENT OF ENSHI FAULT IN QUATERNARY |
| |
| Cai Yongjian,Lei Dongning,Li Heng,Qiao,Yueqiang,Wu Jianchao.ACTIVITY FEATURE AND SLIP RATE OF MIDDLE SEGMENT OF ENSHI FAULT IN QUATERNARY[J].Journal of Geodesy and Geodynamics,2011,31(1):39-43. |
| |
| Authors: | Cai Yongjian Lei Dongning Li Heng Qiao Yueqiang Wu Jianchao |
| |
| Institution: | 1)Institute of Seismology, CEA, Wuhan 4300712)Institute of Earthquake Engineering of Wuhan,Wuhan 4300713)College of Earth Science, China University of Geosciences, Wuhan 430074 |
| |
| Abstract: | On the basis of detailed geomorphologic analysis of faulting profiles and deformed alluvial fans, etc. we suggest that the Enshi fault had been intensely active in Quaternary,it is characterized by dominant dip slip and partly dextral movement component and the displacement of the proluvium fans developed at the valley mouth of a gully. The samples collected from the top of the proluvium fans were dated by Thermo luminescence to be 197.18±16.76 B.P. to 33.33±2.83 B. P. The horizontal slip rate of the middle segment of Enshi fault is determined to be 0.43-0.5 mm/a, and the vertical slip rate is determined to be 0.07-0.17 mm/a. |
| |
| Keywords: | Enshi fault slip rate Quaternary tectonic landforms proluvium fan |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
