安徽巢湖—滁州地区中生代构造变形特征

摘要

The Chaohu-Chuzhou region, Anhui Province, located in thesoutheast of Zhangbaling thrust belt, is characterized by highly structural deforming during Mesozonic Era. The main structural pattern is featured by NE-to NNE trending folds and thrusts and was formed during early Indosinian orogene, while NWW-to E-W trending folds were formed during late Indosinian orogene. Yanshanian deformation of the region is characterized by brittle faulting and sedimentary basin formation, which is closely related to the Tanlu Fault activity.%安徽巢湖—滁州地区位于张八岭冲断带的南东侧，中生代构造活动十分强烈。早印支期，区内以北东—北北东向褶皱和逆冲推覆构造变形为特征，形成区内主体构造格架，为下扬子构造带的组成部分；晚印支期以近南北向挤压作用为主，形成北西西—近东西向叠加褶皱构造。燕山期，受郯庐断裂构造活动的影响，区内断裂活动加剧，形成多期不同性质的脆性断裂及其所控制的沉积盆地(拗陷)。