河南东濮凹陷古近系各组段的原始地层厚度分布及其构造古地理意义

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Abstract The Dongpu Sag is located in eastern Puyang County, Henan Province, i. e. in the southern Linging Depression of the Bohai Bay Basin. The Paleogene consists of members 1 to 4 of Shahejie Formation and the Dongying Formation. The distribution of original stratigraphic thicknesses shows that the Dongpu Sag was a rifted basin in the Paleogene, while the characteristics of different periods were obviously different. During the deposition of Member 4 of Shahejie Formation, a rifted basin with multi subsiding depocenters was developed and its depocenters were not fixed. During the deposition of Member 3 of Shahejie Formation, the Lanliao fault was the main boundary fault controling the Dongpu Sag. A rifted lake basin constructed by complex half graben was developed and it was characterized by two NNE subsiding depositional belts. The differential throw of the fault controlling the sag along the strike direction caused the migration of local subsiding depocenters along the axis in the subsag. During the deposition of members 2 and 1 of Shahejie Formation and Dongying Formation, an anti-S shaped subsiding depoaxis was developed in the Dongpu Sag, which reflects that the vertical displacement in the southern Lanliao fault is obviously smaller than in its middle segment, and the throwments of the Changyuan and Huanghe faults in the southern basin apparently increased. The tectonopalaeogeography in the Paleogene probably resulted from the change of lithospheric dynamic mechanism which led to the development of the rifted basin.

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	Articles by authors
	Qi Jiafu
	Yang Qiao
	Cheng Xiushen
	Neng Yuan
	Xie Chen
	Xu Zhengqiang

Key words： Henan Province Dongpu Sag Paleogene decompaction correction original stratigraphic thickness tectonopalaeogeography

Received: 20 March 2006

ZTFLH:

P53461+1

About author: Yang Qiao is an associate professor of School of Resources and Information, China University of Petroleum (Beijing) , and is mainly engaged in research of basin subsiding history and tectonic analysis of petroliferous areas.第一作者简介杨桥,女,现为中国石油大学(北京)资源与信息学院副教授,主要从事盆地沉降史分析和油区构造解析方面的研究及与地球科学相关的教学工作。

Cite this article:

Qi Jiafu,Yang Qiao,Cheng Xiushen et al. Distribution of original stratigraphic thickness of each member in the Paleogene and its tectonopalaeogeographic implication in Dongpu Sag, Henan Province[J]. JOPC, 2006, 8(3): 407-414.

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http://www.gdlxb.cn/EN/ OR http://www.gdlxb.cn/EN/Y2006/V8/I3/407

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