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Distinguish the co-seismic fault of the Ms8.0 Wenchuan earthquake from the Pengguan thrust belt and analyse its shallow structures in the central Longmen Mountains
Author(s): Lu Renqi, He Dengfa, John Suppe, Meng Zheng, Gao Jinwei, He Hongbing
Pages: 607-
619
Year: 2011
Issue:
3
Journal: Chinese Journal of Geology
Keyword: 地震解释; 轴面分析; 地表破裂; 同震破裂断层; 彭灌断裂带; 龙门山中段;
Abstract: 2008年汶川Ms8.0地震在龙门山中段的彭灌断裂带产生的地表破裂,是该地震产生的第二大地表破裂带.综合应用地质、钻井以及二维、三维地震数据,利用横贯前山带的多条人工地震反射剖面,对彭灌断裂带产生同震破裂的断层进行准确识别和解释.研究表明,龙门山中段的彭灌断裂带是一套由3条主要断层和次级广泛发育的断裂组合构成,浅层表现为叠瓦构造样式,断裂之间发育小型双重构造.汶川Ms 8.0地震在彭灌断裂带产生的...
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