济阳坳陷新生代盆地结构差异性及成因机制  

Cenozoic basin structural differences of Jiyang depression and its formation mechanism

作　　者：张奎华[1,2] 薛雁[2] 吴智平[1] 聂文龙[3] 胡加山[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,青岛266555 [2]中国石化胜利油田分公司勘探开发研究院西部分院,山东东营257015 [3]中国石化胜利油田分公司石油工程技术研究院,山东东营257000

出　　处：《地质科学》2016年第2期561-575,共15页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家重大油气专项“渤海湾盆地精细勘探关键技术”（编号：2008ZX05006）资助.

摘　　要：通过断层活动性分析、典型测线平衡剖面恢复、伸展率统计等方法，对济阳坳陷新生代盆地结构的静态特征和演化过程进行了详细分析，从凹陷内部结构差异、不同凹陷间结构差异、区域结构差异3个层次上对济阳坳陷盆地进行了对比分析并探讨了成因机制。研究结果表明：凹陷内部及不同凹陷间结构的差异主要受控于北西向控盆断裂以及不同演化阶段控盆断裂体系的发育，而区域结构差异主要受控于板块俯冲方式转变下的郯庐断裂带由左旋走滑到右旋走滑的转型以及深部地幔物质由上涌到下沉的转变。In order to investigate the basin structure spatial-temporal differences of Jiyang depression and its dynamical mechanism, the present basin structure and its Cenozoic structural evolution process were analysed in detail by use of fault activity analysis, balance profile restoration and stretching rate statistics. Then the differences were analysed by ＂ structural differences inside sags＂-＂ structural differences between sags＂-＂regional structural differences＂ three levels, and the formation mechanism was discussed. The results show that the differences inner and between the sags were mainly controlled by the different development of pre-existing NW faults and the main fractures in different evolution stages. Otherwise, controlled by the subduction direction changes between Pacific-oceanic plate, Indian plate and Eurasian plate, the movement of Tan-Lu fault zone changed from left-lateral strike slip to right-lateral strike slip. At the same time, deep-seated mantle material experienced a change from upwelling to sinking. The combined action of the above caused regionally structural transformation of Jiyang depression.

关 键 词：盆地结构 构造带 演化过程 差异性 成因机制 

分 类 号：P542[天文地球—构造地质学] TE121.2[天文地球—地质学]