转换带最早是在研究挤压逆冲构造时提出的,是指2条断层间相互作用的构造带。随着进一步研究发现,转换带广泛发育于伸展、挤压和走滑盆地,而且存在于不同尺度的构造中。目前认为转换带形成机制主要有断层分段生长机制和差异运动机制,断层分段生长主要经历3个阶段:孤立成核阶段、"软连接"阶段和"硬连接"阶段;差异运动作用往往导致撕裂断层的形成。基于前人的认识,结合实际地区研究,提出了一套适合裂陷盆地的转换带分类方案,总结了目前裂陷盆地中转换带的识别方法,提出应用"四图一剥"技术分析转换带的形成演化规律。转换带位置为低势区,是水系入盆的通道,从而控制着沉积作用;在此基础上,结合"源-储-圈-运-保"的耦合关系,提出裂陷盆地中转换带控藏机理的研究思路。
Relay zone was first raised on research of thrust structures,which is the structural zone of interaction between two faults.With further study,relay zone is found to be developed widely in the extensional,compressional and strike-slip basin,as well as in the structures of different scales.At present,there are two main formation mechanisms of relay zone,including fault segment growth and differential movement.The growth of fault segmentation mainly undergo three stages:isolation of the nucleation stage,"soft linkage"stage and "hard linkage"stage.Differential movement often leads to the formation of teared faults.Based on the previous knowledge,combined with the actual regional studies,we propose a suitable classification scheme of relay zone in rift basin and summarize current identification methods of relay zone in rift basin,to launch a "four figure-one backstripping"technology to analyze the formation and evolution of relay zone.Relay zone is relatively low-potential area,which is a channel for water system merge into basin and controls deposition.On this basis,according to the coupling relationship of "sources-reservoirs-trap-migration-preserve",we propose a research idea on reservoir-controlling mechanism of relay zone in rift basin.