关于汶川大地震的几个地质问题  

Some Geologic Questions About Wenchuan Violent Earthquake

作　　者：孙玮[1] 罗志立[2] 杨荣军[2] 刘树根[3] 雍自权[2] 代寒松[2] 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]成都理工大学能源学院,成都610059 [3]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059

出　　处：《新疆石油地质》2009年第1期124-128,共5页Xinjiang Petroleum Geology

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。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.

关 键 词：四川 汶川 大地震 陆内俯冲 双震余震型 成都 

分 类 号：P542[天文地球—构造地质学] P315.2[天文地球—地质学]