冀中坳陷饶南地区拆离构造特征  

Detachment structure in the Raonan area,Jizhong Depression

作　　者：郑大海[1] 刘池洋[2] 崔永谦 罗晓容[1] 

机构地区：[1]中国科学院地质与地球物理研究所 [2]西北大学地质学系 [3]中国石油华北油田公司物探研究院

出　　处：《石油勘探与开发》2004年第6期36-39,共4页Petroleum Exploration and Development

摘　　要：认为前人标定的冀中坳陷南部的饶南地区沙四段与沙三段间的界面是拆离作用形成的构造界面,而非沉积界面。饶南地区拆离构造以原始的基底面为底界,以沙四段-孔店组顶面为顶界,形成一个沉积盖层的底部剪切带,几乎整个沙四段-孔店组被卷入剪切带内,还卷入部分沙三段以及部分基底地层,其平面展布范围受东部边界沧西断裂及西部斜坡和刘村低凸起所限,剪切带内变形很复杂。对拆离构造的特征进行了论述,给出确定拆离构造的的依据,并对拆离构造形成机制进行了初步探讨。The interface between Member 3 and 4, Shahejie Formation in Raonan area of south Jizhong Depression is developed by a lower detachment surface but a sedimentary surface. The top boundary of Member 4 of Shahejie Formation-Kongdian Formation is the upper surface of detachment in Raonan area. The stratigraphy of Member 4 of Shahejie Formation-Kongdian Formation is a sheared belt in the basement of basin. Part of Member 3 and basement stratum are involved in the sheared belt. In the sheared belt, the deformation is quite complex. The evidences for detachment are described. The area that detachment movement has extended is controlled by the Cangxi fault on east, west slope, and the Liucun lower uplift. The mechanism of detachment deformation movement is described.

关 键 词：拆离构造 底部剪初带 构造界面 构造分区 拆离断层 

分 类 号：TE122.1[石油与天然气工程—油气勘探]