海西-印支期中国南方的盆地演化与层序格架  

Basin evolution and sequence stratigraphic framework of south of China during Hercynian cycle to Indo-Chinese epoch

作　　者：陈洪德[1] 侯明才[1] 刘文均[1] 田景春[1] 

机构地区：[1]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：《成都理工大学学报（自然科学版）》2004年第6期629-635,共7页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：四川省重点学科"构造地质学"建设基金资助项目(SZD0408)

摘　　要：加里东运动以后,扬子和华夏陆块拼合成统一的华南板块。自早泥盆世至中二叠世茅口期,华南板块和西边的三江构造区开始了以伸展作用为主的海西运动,中国南方的沉积、构造演化具有被动大陆边缘的性质,盆地类型则从陆内裂陷盆地演变为被动陆缘裂陷盆地。以东吴运动为标志,中国南方开始了印支运动,其板块活动转变为活动大陆边缘,进入到弧后盆地和前陆盆地阶段。因此,海西-印支运动构成了一个完整的构造旋回。据此,将海西-印支旋回划归为一个一级层序,再根据不同时期,盆地所处的演化阶段和盆地类型的差异,划分为6个二级层序。其中,二级层序SS1～SS5反映了海西期中国南方从陆内裂陷盆地到被动陆缘裂陷盆地所经历的初始拉张-拉张发展-停滞-成熟的全过程,而二级层序SS6却反映了印支运动早期弧后盆地和前陆盆地的形成发展历程。After the Caledonian orogeny, the Yangtze plate and the Cathaysia landmass were matched together to be the united plate of south China. Since Lower Devonian to Middle Permian Maokou period, the Hercynian movements which relied on extension motion began in the south China plate and Sanjiang tectonic area in the west of south China Plate, the deposition and the tectonic evolution of south China had characters of passive continental margin, which was characterized by intracontinental rift basin to passive continental margin rift basin for the basin type. Regarding the Dongwu movements as the sign, the Indo-Chinese movement began in the south of China. Its plate activity changed to the active continental margin and transited to the period of the retroarec basin and foreland basin. So, the Indo-Chinese movement and the Hercynian movement made a complete tectonic cycle. In term of the evolution, the authors divides it into one Ⅰsequence. Then according to different periods, the difference of evolution stage and basin type, Ⅰ sequence is divided into 6 Ⅱ sequence. Among them, Ⅱsequence SS1～SS5 reflect the south of China developed from intracontinental rift basin to passive continental margin rift basin, which experienced initial tensile-tensile development-detention-maturity periods during Hercynian cycle. Then Ⅱsequence SS6 reflects the proceeding, which the retroarec basin and foreland basins of the south of China formed during Indo-Chinese movement.

关 键 词：中国南方 海西期 印支期 盆地演化 层序格架 

分 类 号：TE121.1[石油与天然气工程—油气勘探]