渤海湾南部埕岛地区中生代变形特征及构造演化  

Mesozoic deformation and tectonic evolution in Chengdao,Southern Bohai Bay

作　　者：程晓敢[1] 唐其升[1] 陈汉林[1] 秦都[2] 杨树锋[1] 

机构地区：[1]浙江大学地球科学系 [2]中国石化油田事业部勘探处

出　　处：《石油勘探与开发》2006年第5期596-599,共4页Petroleum Exploration and Development

摘　　要：应用钻井资料、地震资料并结合区域资料,对渤海湾南部埕岛地区的中生代构造特征及演化进行了研究。研究表明:埕岛地区三叠纪以挤压变形为特征,变形的构造线方向为北西—北北西向,发育了北西向背斜和北北西向逆断层,埕北20断层在此时期是典型的逆冲断层;晚侏罗世—早白垩世以伸展变形为特征,发育了受北北西向断层控制的断陷,在断陷内发育了巨厚的中生界,埕北20断层此时为研究区主要正断层,同时还受走滑作用的影响,近东西向右行走滑断层错断了北北西向的埕北20断层;晚白垩世受挤压应力的影响发生变形,早期正断层发生正反转,断层上盘发育了与断层形态有关的褶皱。The paper applies seismic and well-log data to the study of the Mesozoic structural characteristics and tectonic evolution in Chengdao Region. In Triassic, the NW-trending folds and NNW-trending reverse faults developed in Chengdao Region as a result of compressive stress, and the Chengbei 20 fault was a representative reverse fault. From 1.ate Jurassic to Early Cretaceous, the structural characteristic was mainly extension in the region, and there developed fault basins controlled by NNW-trending normal fault. The Chengbei 20 fault, which controlled the very thick Mesozoic deposits, was the chief basin-controlled fault in Chengdao Region at the stage. Simultaneously, EW-trending dextral strike-slip faults cut Chengbei 20 fault. Because of contracting deformation, the unconformity between Cenozoic and Mesozoic and inversion structures were formed in Late Cretaceous.

关 键 词：埕岛地区 中生代 变形特征 构造演化 

分 类 号：P54[天文地球—构造地质学]