摘要
利用大地电磁测深结果建立布雅含煤盆地基底构造格架,结合构造和沉积物特征分析,将该盆地沉积充填演化阶段划分为初始沉降阶段、稳定沉降扩展聚煤期、相对上升阶段、强裂沉降阶段以及萎缩填平等五个阶段,分别对应于早侏罗世、中侏罗世、晚侏罗世一白垩纪、古新世一下更新世以及中更新世时代的地层沉积。分析结果表明,布雅含煤盆地的形成与华力西以来的构造运动有着密切的联系,其构造和沉积充填演变过程对盆地内煤系地层的沉积规律具有强烈的控制作用。
The structural framework of Buya coal-bearing basin was built using the magnetotellurics interpretation results, joining with the analysis of structure and sedimentary characteristics, the structural and sedimentary filling evolution in the basin can be subdivided into five phases： initial subsidence phase, stabilized subsidence and extended coal-accumulate phase, relative ascended phase, strong subsidence phase, atrophic and filling phase, which in corresponding with the stratum sediment of early Ju- rassic, middle Jurassic, late Jurassic-Cretaceous, Paleocene-early Pleistocene and middle Pleistocene. The result shows that, the formation of Buya coal-bearing movement after variscian, the structural and sedimentary basin have great relationship with the tectonic filling evolution have strong controlling effects on sedimentary regulation of coal-bearing stratum in the basin.
出处
《西安科技大学学报》
CAS
北大核心
2009年第1期54-57,共4页
Journal of Xi’an University of Science and Technology
关键词
含煤盆地
构造格架
沉积演化
coal-bearing basin
structural framework
sedimentary filling evolution
