| 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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| 引用本文： | 杨桥,漆家福,程秀申,能源,谢宸,徐政强.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[J].古地理学报,2006,8(3):407-413. |
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| 作者姓名： | 杨桥 漆家福 程秀申 能源 谢宸 徐政强 |
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| 作者单位： | 中国石油大学(北京)教育部油气成藏机理实验室,北京,102249;中国石化中原油田石油勘探开发研究院,河南,濮阳,457000 |
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| 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—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—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—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。
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| 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 |
| 文章编号： | 1671-1505（2006）03-0407-07 |
| 收稿时间： | 2006-03-20 |
| 修稿时间： | 2006-04-10 |
Distribution of original stratigraphic thickness of each member in the Paleogene and its tectonopalaeogeographic implication in Dongpu Sag, Henan Province |
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| Yang Qiao,Qi Jiafu,Cheng Xiushen,Neng Yuan,Xie Chen,Xu Zhengqiang.Distribution of original stratigraphic thickness of each member in the Paleogene and its tectonopalaeogeographic implication in Dongpu Sag, Henan Province[J].Journal of Palaeogeography,2006,8(3):407-413. |
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| Authors: | Yang Qiao Qi Jiafu Cheng Xiushen Neng Yuan Xie Chen Xu Zhengqiang |
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| Abstract: | The Dongpu Sag is located in eastern Puyang County,Henan Province,i.e.in the southern Linqing 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 MemberJP2] 3 of Shahejie Formation,the Lanliao fault was the main boundary fault controlling 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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| Keywords: | Henan Province Dongpu Sag Paleogene decompaction correction original stratigraphic thickness tectonopalaeogeography |
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