银根盆地基底构造特征及其控盆意义

Basement structure of Yingen basin and its significance on basin evolution

摘要: 为了揭示基底构造与盆地形成演化的关系,从重力、磁力、大地电磁测深、地震、钻井资料入手,研究银根盆地的基底构造特征,并发现其成盆作用与基底构造之间的动力学关系。认为银根盆地具有双重基底,结晶基底为块状结构,褶皱基底为层状结构。盆地演化经历了区域隆起阶段(AnC)、古裂谷盆地形成阶段(C-P)、三叠-侏罗纪隆起阶段(T-J)、裂谷盆地发育阶段(K₁b-K₁s)和坳陷阶段(K₂-E)。

Abstract: To discover the relationship between basement structure and evolution of Yingen basin,the basement structure is studied with methods combining gravity,magnetic,MT and seismic data,drilling data.The results indicated the basin's dynamic relationship between basin formation and basement structures.The Yingen basin is of duplex basement composed of blocked crystal basement and layered metamorphic basement.The evolution of the basin elapsed several stages including regional uplift(AnC),paleo-rift stage(C-P),uplift stage(T-J),rift stage(K₁b-K₁s) and regional depression stage(K₂).