成都平原的晚新生代构造

Cenozonic tectonics of Chengdu Plain,Sichuan,China

根据成都平原晚新生代地层的展布、接触关系,以及与邻区的构造组合,对成都平原的基本构造格架进行了初步分析,描述了蒲江-新津断裂、大邑断裂、竹瓦铺断裂、绵竹断裂等晚新生代断裂,将成都平原的构造演化划分为6个阶段,对上述断裂的构造活动性与龙门山断裂带进行了分析对比。

Based on the distribution of the Late Cenozoic strata,stratigraphic relation and around structures,Chengdu Plain is situated in the synclinal depression.During Middle Himalaya Movement,Chengdu synclinal depression grew.It is a decollment in the deposits overlying the basement of Yangtze Platform.There are four active faults in Chengdu Plain.But their activity is little during Late Cenozoic era.A preliminary division of six stages is done on the tectonic evolution for Chengdu Plain.Furthermore,the correlation of the fault activities between Chengdu Plain and Longmen Mountains is made in this paper.