2015年6月，第21卷，第2期，215-222页
June 2015,Vol.21,No.2,pp.215222 D0I:10.16108/j.issn10067493.2014170
高校地质学报
Geological Journal of China Universities
辽东湾陷东部地区新生代断裂体系与构造演化
徐长贵2，任健1*，吴智平1，李伟，张婧1，张晓庆
1.中国石油大学（华东）地球科学与技术学院，青岛266580
2.中海石油总公司天津分公司，天津300452
摘要：断裂体系发育特征是辽东湾坳陷东部地区新生代构造演化的重要表现形式，运用丰富的三维地震资料，详细刻画了研究区断裂体系平面和削面特征。断裂体系特征分析表明：研究区古新世-渐新世的断裂体系主要由NNE向的拉张正断层组成；渐新世时期的断裂体系则表现出走滑断裂的性质，主干断裂附近出现走滑效应产生的增压区和释压区，同时发育似花状构造和多级“y”字型构造，次级断裂多表现为雁列状的NEE向断裂；新近纪时期断裂体系仍以雁列状断裂为主，发育共轭状剪切破裂以及“背形负花”状构造。断裂体系的研究明确了研究区新生代走滑构造系统与伸展构造系统的叠加改造过程，结合研究区构造动力学背景，将辽东湾墩陷东部地区的构造演化阶段划分为古新世-始新世的弱走滑强拉张期、渐新世的弱拉张强走滑期以及新近纪的弱挤压弱走滑期。
关键词：断裂体系；拉张断裂：走滑断裂；构造演化；辽东湾坳陷
中图分类号：P542.3
文献标识码：A
文章编号：1006-7493（2015）02-0215-08
CenozoicFaultSystemandTectonicEvolutionoftheEastern
LiaodongBayDepression
XU Changgui,REN Jiant2*,WU Zhiping',LIWei',ZHANG Jing',ZHANG Xiaoqing
I. China University of Petroleum, Qingdao 266580, China;
2. Tianjin Technical Department, CNOOC, Tianjin 300452, China
Abstract: Development characteristics of a fault system are an important manifestation of the structural evolution of the eastem Liaodong Bay Depression in the Cenozoic period. Based on plenty of three dimensional seismic data, this paper describes the horizontal decreased and sectional characteristics of fault systems in detail in the study area and analyzes the formation mechanism of the fault systems, The result shows that the fault systems in the Paleocene and the Eocene mainly consist of NNE trending extensional faults. And the fault systems in the Oligocene have the strike-slip characteristics. The vicinity of main faults has significantly stress-increased area and stress-decreased area due to the strike-slip effect. The flower-liking structures and “Y"-type structures can be observed in the seismic profiles. The secondary faults mostly consist of NEE trending en-echelon faults. The main faults and the secondary faults can form strike-slip duplex, In Neogene, the secondary faults are still manifested as NEE trending en-echelon faults and the fault system shows characteristics of weak strik-slip. And conjugate shear fractures and antiform-negative flower structures began to appear in this period. The study of the fault system illustrates the superimposition and transformation between extension tectonic systems and strike-slip tectonic systems in the eastern Liaodong Bay Depression in the Cenozoic, Combined with dynamic evolutionary mechanism
收稿日期：20140921；修园日期：2014-1220
基金项目：国家油气重大专项课题（2011ZX05023-006-05)；中央高校基本科研业务费专项资金资助（27R1101053A）；中央高校基本科研业务费专
项资金资助（14CX06079A）联合资助
作者简介：徐长贵，男，1971年生，博士，地质总师，主要从事石油地质与勘探方面的研究；
*通讯作者：任健，男，1989年生，硕士研究生，主要从事构造地质学方面的研究；E-mail:625802025@qq.com