辽东湾JZ27-33区块伸展型右行走滑双重构造系统  

The extensional dextral strike-slip duplex of JZ27-33 Block in Liaodong Bay

作　　者：万桂梅[1,2] 汤良杰[1,2] 金文正[3] 

机构地区：[1]中国石油大学盆地与油藏研究中心,北京102249 [2]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [3]中国地质大学(北京)能源学院,海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处：《中国地质》2010年第6期1584-1591,共8页Geology in China

基　　金：中海油天津分公司项目“渤海湾地区油气形成富集与分布预测”(SC06TJ-TQL-004)资助

摘　　要：辽东湾JZ27-33区块发育3条大型NNE向走滑断裂,分别为辽中3号断裂(或者辽中1号断裂)、辽中2号断裂和辽东2号断裂,在平面上,3条走滑断裂呈"雁行式"展布,其间密集发育具有走滑性质的正断层,这些正断层在平面上成NE或者NEE走向,与主走滑断裂斜交,其锐角的指向为本盘地层在平面上的位移方向;在横剖面上,负花状构造是研究区内的大型走滑断裂在横剖面上的重要特征,综合分析认为,研究区的断裂特征在平面上表现为"双重构造"特征,在横剖面上表现为(负)花状构造,构成了典型的"伸展型右旋走滑双重构造"系统,并且认为,形成这种构造样式的控制因素主要有:郯庐断裂带的右旋走滑作用、平面展布特征、多期构造活动以及能干性特征明显的沉积地层。Three main NNE-striking strike-slip faults are developed in JZ27-33 block of Liaodong Bay,i.e.,Liaozhong 3 fault（or Liaozhong 1 fault）,Liaozhong 2 fault and Liaodong 2 fault.These 3 faults assume en echelon distribution on the plane,with many secondary normal faults of strike-slipping nature developed between them.These normal faults strike NE or NEE and obliquely intersect main strike-slip faults,and the sharp angle between them indicates the corresponding stratigraphic moving direction on the plane.Negative flower structure is another important feature of the giant strike-slip faults.It is therefore concluded that the faults of the study area have characteristics of ＂duplex＂ on the plane and negative flower structure on the cross-section,and that the faults in JZ27-33 block of Liaodong Bay formed a typical ＂extensional dextral strike-slip duplex system＂,with the main controlling factors composed of the dextral strike-slip and plane distribution of Tanlu fault,the multi-phase tectonic movement and the brittle sedimentary layers.

关 键 词：走滑断裂 花状构造 走滑双重构造 右行 辽东湾 

分 类 号：P542.3[天文地球—构造地质学]