饶阳凹陷古近系层序地层演化影响因素

Influence factors on evolvement of sequence stratigraphy in Paleogene, Raoyang Depression

王林 倪超 于永兴

中国地质大学能源学院，北京 100083 杭州地质研究所， 浙江 杭州 310023 辽河油田公司兴隆台采油厂，辽宁 盘锦 124011

综合多学科地层标志的分析，在饶阳凹陷古近系划分出三个二级层序、十个三级层序。层序发育的影响因素可分为构造沉降、沉积物供给和气候因素。不均匀的构造沉降造成了沉降沉积中心的迁移，形成的古坡折则控制了沉积相类型和层序的几何构型。沉积物的供给速率影响了体系域中的准层序组类型，使得进积式准层序组可发育在湖侵体系域之中。而干热的气候条件则形成气候层序并控制了沉积物的类型。

According to the multidisciplinary analysis of formation characteristics involved, the Paleogene can be divided into three
secondary-order sequences and ten third-order sequences in Raoyang Depression. The development of sequence can be controlled
by three factors, namely tectonic subsidence, sediment supply and climate. The nonuniform tectonic subsidence resulted in the
transportation of subsidence center and the relevant slope breaks controlled the types of sedimentary facies and geometric
construction of sequences. The types of subsequence sets were affected by the sediment supply, which can make a prograding
subsequence set developed in the transgressive system tract. And the climate sequence was developed in the xerothermic climate
which can affect the sediment types