【摘要】 通过对发生汶川大地震的龙门山断裂带的地质构造背景分析,结合龙门山断裂带浅部和深部构造特征,回答了人们关注的几个构造地震问题,认为汶川大地震是陆内俯冲(C-俯冲)引起的构造地震,可能为双震余震型地震,因而震级大、破坏性强。并通过对比龙门山断裂带和成都平原的发震地质条件,认为成都平原处于稳定的扬子古板块内,不存在发生大地震的地质条件。更多还原

【Abstract】 The analysis of the geologic tectonic background and structural units division of Longmenshan fault belt where the Wenchuan violent earthquake happened in May 2008 replies the questions about tectonic earthquakes,combined with sallow and deep structural characters of Longmenshan fault belt.It is indicated that Wenchuan violent earthquake belongs to tectonic earthquake resulted from intracontinental subduction(C-subduction),probably being the type of double major shocks plus aftershocks.Hence,it has high magnitude and intensive destruction.By comparison of the geologic conditions causing the earthquake of Longmenshan fault belt with Chengdu plain,it is believed that a big earthquake could not take place in Chendu plain for it locates within the stable ancient Yangtze plate.更多还原