淤积相是松辽盆地独具特征的沉积岩相,发育于青山口晚期—姚家组时期湖盆收缩过程之中。本文通过该时期古构造发育史、沉积古地理背景及淤积相内部原生结构、构造特征的分析,初步探讨了淤积相的成因。 Sedimentary facies is a unique sedimentary facies in the Songliao Basin, which developed in the late Qingshankou-Lake basin during the Yaojia Formation. Based on the palaeotectonic history, the paleogeographic background of sediments and the analysis of the original structure and tectonic features of the sedimentary facies during this period, the causes of the sedimentary facies are discussed.