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应用层序地层学和沉积学的基本原理及方法,在秭归盆地上侏罗统两条实测剖面研究基础上,阐述了研究区层序界面类型及特征、层序特征、控制层序发育的因素等。研究发现,该区上侏罗统发育了5个三级层序界面,类型以不整合面及侵蚀沉积间断面、岩性岩相突变界面、地层叠置方式转换面为主。层序SQ1到SQ5基准面旋回经历了由对称到不对称的过程,指示构造与气候联合控制了地层的沉积。遂宁组旋回基准面处于相对较高位置且较稳定,蓬莱镇组旋回基准面波动较大,盆地处于过饱和沉积状态。
Based on the study of two measured sections of Upper Jurassic in the Zigui Basin, the basic principles and methods of sequence stratigraphy and sedimentology are described. The types and characteristics of sequence boundaries, the characteristics of sequence and the factors controlling the development of sequence Wait. It is found that there are 5 third-order sequence interfaces in the Upper Jurassic, which are dominated by unconformity and erosion sedimentary facies, lithologic facies facies alteration, and stratigraphic transition. Sequence SQ1 to SQ5 cycles experienced a process from symmetry to asymmetry, indicating that the combination of tectonics and climate controls the formation deposition. The rotation datum of Suining Formation is relatively high and relatively stable. The swirling datum of Penglaizhen Formation fluctuates greatly, and the basin is in a supersaturated sedimentary state.