石油实验地质2017，Vol.39Issue(1)：8-14,23,8.DOI:10.11781/sysydz201701008
苏北盆地高邮凹陷基底先存断裂成因及其对新生断裂的控制
Origin of pre-existing basement faults and their controls on new fault formation in Gaoyou Sag, Subei Basin
摘要
Abstract
The Zhenwu and Wubu faults are two major pre⁃existing basement faults in the Gaoyou Sag, Subei Basin. They were formed during the Indosinian period when the Lower Yangtze plate collided with the North Chi⁃na plate, and strike NEE in the west and NNE in the east. The regional stress field and 3D seismic data showed that the controls of the two faults on the development of the southern terrace can be divided into four periods as follows. (1) Tectonic compression. The north of the Lower Yangtze plate collided with the southeast of the North China plate, developing a series of thrust slip, thrust⁃motion and complicated dislocation. (2) Tectonic reverse. The Zhenwu fault reversed from a normal fault to a reverse fault. (3) Orthogonal rifting. The Zhenwu fault diffe⁃rentiated into the Zhen① and Wu① faults which controlled the formation of Zhenwu and Wubu terraces. (4) Oblique rifting. The Zhenwu and Wubu terraces were controlled by NS oriented extensional environment instead of the Zhenwu fault. Tectonic deformations were different in the Zhenwu and Wubu terraces. According to the activity of pre⁃existing basement faults in new faults, they were classified into four types from strong to weak in turn: inherited, variable, adjusted, and induced. Pre⁃existing basement faults were the foundation of the southern terrace formation and evolution, and strongly influenced the development of new faults.关键词
断裂形成演化/断裂控制作用/基底先存断裂/南部断阶带/高邮凹陷/苏北盆地Key words
fault formation and evolution/fault control/pre-existing basement fault/south terrace/Gaoyou Sag/Subei Basin分类
能源科技引用本文复制引用
束宁凯,吴林,汪新文,郭建平..苏北盆地高邮凹陷基底先存断裂成因及其对新生断裂的控制[J].石油实验地质,2017,39(1):8-14,23,8.基金项目
国家科技重大专项（2011ZX05028，2011ZX05009－002）资助。 （）
