摘要
三塘湖盆地中、新生代沉降与沉积作用是在一种准平原化的地貌背景上发生、发展的，共经历了两个沉降期：侏罗纪—早白垩世，第三纪—第四纪和一个隆升期晚白垩世。相应形成了两种类型的盆地：中生代为简单的坳陷盆地；新生代为与“Ａ”型俯冲作用相关的前陆盆地。与此同时，盆地沉降中心亦经历了自北向南的迁移过程。三塘湖盆地这种隆坳格局的变化明显受区域构造作用控制。
A quantitative study on Mesozoi-cenozoic subsidence history of Santanghu Basin has been made by using backstripping analysis method. The main conclusions obtained from the study are as follows: since Mesozoic, the evolution of Santanghu Basin has undergone two subsidence stages (Jurassic - Early Cretaceous, Tertiary - Quaternary) and one uplift stage (late Cretaceous). Correspondingly, two types of basins have been formed (a simple depression basin during Jurassic - Early Cretaceous and foreland basin during Cenozoic). The subsidence center also migrated from north to south part of the studied area during Early Jurassic, the subsidence center was located in north section of the basin and the orientation of depression and uplift was about EW direction, while since late Jurassic, the subsidence center migrated to south section of the basin, and the orientation of depression and uplift was in NW direction. All of these alteration was controlled by regional tectonics.
出处
《西南石油学院学报》
CSCD
1997年第4期36-43,共8页
Journal of Southwest Petroleum Institute
关键词
盆地
沉降
新生代
沉积作用
湖泊
Santanghu Basin
Backstripping
Subsidence
Depression
Foreland
