Paleogene Structure-Stratigraphic Framework and Multiple Episode Evolution in Kongnan Area, Huanghua Depression
详细信息
- 责任者：Ye Lin (Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhang Junxia
- 刊名：Earth Science
- 出版年：2013
- 卷期：38(2)
- 关键词：构造圈闭 ; structural traps ; 地层圈闭 ; stratigraphic traps ; 黄骅坳陷 ; Huanghua Depression
- 页码：p.379-389
- 图表：illus., 31 refs.
- 分类号：1003
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
Based on the newly released 3D seismic and drilling data in the Kongnan Area, Huanghua Depression, we tracked several sequence boundaries on the seismic profiles and interpreted structure styles and seismic reflection characteristics, which will help us identify an important tectonic unconformity boundary(Ek1Ⅲ) and further classify the episodic stages of tectonic evolution in Paleogene and build up structure-stratigraphic framework in rifting stages of the basin. Furthermore, we analyzed the detailed tectonic evolution processes of the basin with different tectonic episodes of rifting stages by means of backstripping and fault properties, combination types, activity analysis, that confirm that Ek1Ⅲ boundary represents the tectonic revolutionary boundary which imply a rifting initiation from upper First member of Kongdian Formation to Dongying Formation in Kongnan Area. From Third member of Kongdian Formation to lower First member of Kongdian Formation evolution of the basin was controlled by sag effect. At rifing stage,the basin underwent processes from extensional episode to dextral strike-slip and extensional episode .Both of the fault systems and subsidence center have migrated regularly and restricted the distribution of the basin depositional system.