油气地质与采收率2012，Vol.19Issue(5)：34-38,5.
福山凹陷古近系沉降特征时空异性及其形成机制
Research on temporal diversity of settlement characteristics of Paleogene, Fushan Sag
摘要
Abstract
Tectonic is very active in Cenozoic of Beibuwan Basin,Fushan Sag located in margin of Beibuwan Basin,whose regional tectonic of Paleogene is very complicated and research level is low, without study of tectonic subsidence history. Application of EBM basin modeling system for subsidence history in Fushan Sag, the back stripping analysis shows that; Fushan Sag has successively suffered rift period, transformational period and depression period, the changing of subsidence rate emerges "episode" characteristic; west secondary depression sedimentation rate is higher than which in east secondary depression since chasmic I episodic period, but from the chasmic III episodic, the east secondary depression sedimentation increased, so, the sedimentation rate is higher than which in west secondary depression. Frorrt the location of the center of subsidence, at the early period of chasmic, the subsidence center is located in the Huang Tong region of western depression, but at the advanced of chasmic(chasmic III episodic) , the center of subsidence gradually migrates to the Bailian region of eastern depression, then, the regional center of subsidence continues migration to the northeast. Vertical sedimentation rates of the east and west secondary depression are different, besides, regional subsidence center migrates from west to east of Paleogene in Fushan Sag, reflecting the east and west secondary depression in Fushan Sag having space-time diversity in the characteristics of subsidence; Research finds that the tectonic activity diversity of secondary depression and Fushan Sag suffered by regional asymmetric extension effect is inner mechanism which has caused this space-time diversity of east-west settlement.关键词
沉降演化/非对称拉伸/差异性/形成机制/幕式构造作用/福山凹陷Key words
subsidence evolution/asymmetric tensile/diversity mechanism/occurrence mechanism/episodic tectonic/Fushan Sag分类
能源科技引用本文复制引用
余江浩,廖远涛,林正良,李媛,王苗..福山凹陷古近系沉降特征时空异性及其形成机制[J].油气地质与采收率,2012,19(5):34-38,5.基金项目
中国地质大学(武汉)构造与油气资源教育部重点实验室基金资助项目"北部湾盆地福山凹陷古新统陆相红层成因及构造指示意义"(TPR-2011-24). （武汉）
