【摘要】 汶川8.0级地震的发震构造为龙门山断裂带。地震地表破裂分布在北川-映秀断裂和江油-灌县断裂上,长度分别为200km和70km。地震地表破裂表现为地表出露的地震破裂面、雁列分布的地震裂缝、地震断坎和断塞塘等。地表破裂的性质主要为右旋逆冲,最大同震位错的逆冲量和走滑量均为5.0m左右,分别位于擂鼓和虹口附近。地表破裂带的最大挤压缩短量为3.5m左右,最大宽度约为70~100m。更多还原

【Abstract】 The seismogenic structure of Wenchuan Earthquake(M8.0) is the Longmenshan fault zone.Its surface rupture occurs on the Beichuan-Yingxiu and the Jiangyou-Guanxian faults,with the lengths of 200km and 70km,respectively.The surface rupture includes seismic fault plane,en echelon fissures,co-seismic scarps et al.The surface rupture is characterized with reversed faulting with strike-slip movement.Its maximum reversed and strike-slip displacements are on the order of 5.0m each,occurring on Leigu town and Hongkou town,respectively.Its maximum compressed shortening is about 3.5m,and the maximum width is 70～100m.更多还原