摘要
在建立层序地层格架的基础上,对南阳凹陷南部断超带古近系各个层位沉降史进行了回剥分析。研究表明,南阳凹陷南部断超带各沉积期沉降中心是不断变化和迁移的,沉降速率与构造活动期次密切相关,随构造活动程度发生变化。南部断超带的沉降速率在时间上经历了较强-增强-最强-减弱-进一步减弱的变化。由于都受南阳边界断裂的直接控制和间接影响,古近系各沉积期随着构造活动剧烈的阶段沉降速率变大,构造活动减弱的阶段沉降速率变小。
The back-stripping analysis of Paleogene subsidence history in the south fault belt of Nanyang Sag is studied based on the sequence framework.The result shows that the center of subsidence is changing and transferring during each depositional stage,and the rate of settlement changes with the degree of tectonic activity.The subsidence speed experience strong-boost up-strongest-weaken in time.Because of the influence of boundary fault in Nanyang Sag,the subsidence speed become rapid when the structural activity become acuity,the Subsidence speed become slow when the structure activity become weaken.
出处
《长江大学学报（自然科学版）》
CAS
2011年第6期15-19,5,共5页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金资助项目(40872077)
关键词
古近系
沉降速率
沉降中心
南部断超带
南阳凹陷
paleogene
subsidence rate
subsidence center
south fault belt
Nanyang Sag
