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http://www.igeodata.org/handle/20.500.11758/198
点击复制成果名称: | High-angle fault responsible for the surface ruptures along the northern segment of the Wenchuan Earthquake Fault Zone: Evidence from the latest seismic reflection profiles |
作者: | Chan Wu Haibing Li Philippe Hervé Leloup Changqing Yu Jialiang Si Dongliang Liu Jiawei Pan Marie-Luce Chevalier Zheng Gong |
首次发表日期: | 2014-01 |
出版者: | Institute of Geology Chinese Academy of Geological Sciences |
摘要: | The inverse/right-lateral Yingxiu–Beichuan fault ruptured during the Wenchuan earthquake for ~270 km. We investigated the northeastern segment of that fault by analysing 3 newly acquired and 3 older seismic lines that cross the fault. We combine this analysis with that of the surface ruptures and of the regional geology in order to discuss the geometry, the style and the amount of motion of the fault. We conclude that the Yingxiu– Beichuan fault is very steep (~70°) at the surface and has still a dip N 45° at 6 km depth. The fault offsets all pre- vious structures and particularlythe Tangwangzhainappesfrom which a verticaloffsetof3 to6 kmisevaluated. The right-lateral component of motion along the Yingxiu–Beichuan fault appears to be larger at the surface than at depth and increases only slightlytowards the NE.We suggest that the Yingxiu–Beichuan faultis continuous at depth between its northern and southern segments. |
引用地址: | http://www.igeodata.org/handle/20.500.11758/198 |
所属集合: | 科技成果 |
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条目 | 描述 | 大小 | 格式 | |
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High-angle Fault Responsible for the Surface Ruptures Along the Northern Segment of the Wenchuan Earthquake Fault Zone.pdf | 6.63 MB | Adobe PDF |
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