古地理学报 ›› 2006, Vol. 8 ›› Issue (3): 407-414.

• 构造古地理学及古构造 • 上一篇    下一篇

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

杨桥1, 漆家福1, 程秀申2, 能源1, 谢宸2, 徐政强2   

  1. 1 中国石油大学(北京)教育部油气成藏机理实验室,北京 102249;
    2 中国石化中原油田石油勘探开发研究院,河南濮阳 451000
  • 收稿日期:2006-03-20 修回日期:2006-04-10 出版日期:2006-06-01 发布日期:2006-06-01
  • 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。

Distribution of original stratigraphic thickness of each member in the Paleogene and its tectonopalaeogeographic implication in Dongpu Sag, Henan Province

Qi Jiafu1, Yang Qiao1, Cheng Xiushen2, Neng Yuan1, Xie Chen2, Xu Zhengqiang2   

  1. 1 China University of Petroleum (Beijing), Beijing 102249;
    2 Geological Institute of Exploration and Development, Zhongyuan Oilfield, SINOPEC, Puyang 457000, Henan
  • Received:2006-03-20 Revised:2006-04-10 Online:2006-06-01 Published:2006-06-01
  • 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。

摘要: 东濮凹陷位于河南省濮阳市东部,属中原油田。古近系自下而上包括沙河街组一至四段和东营组。古近系原始地层厚度分布反映出东濮凹陷在古近纪具有裂陷盆地的构造古地理特点,但是古近纪不同时期裂陷盆地的特征有明显的差异。沙四段沉积时期发育多沉降—沉积中心的断陷湖盆,且沉积中心不稳定; 沙三段沉积时期兰聊断层是控制东濮凹陷的主边界断层,发育由2条相对稳定的NNE 向沉降一沉积带构成的复式半地堑断陷湖盆,控凹断层位移沿走向的差异导致局部沉降一沉积中心在次级凹陷带内沿轴向迁移; 沙二段、沙一段和东营组沉积时期东濮凹陷发育“反S型”沉降一沉积带,反映兰聊断层南段的垂直位移明显小于中段,而盆地南部的长垣断层与黄河断层的垂直位移量明显增大。古近纪构造古地理演化特征可能是导致断陷湖盆发育的岩石圈动力学机制变化的结果。

关键词: 河南省, 东濮凹陷, 古近系, 去压实校正, 原始地层厚度, 构造古地理

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.

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

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