Sub-Moho Surface Structure of Songliao Basin in Northeast China

Abstract: Songliao basin is located at the junction of the Eurasian plate and the Pacific plate, and its deep tectonic evolution has the characteristics of multiple periods and multiple sources, so the structural characteristics are very complex, and there is great significance to study the formation and evolution of the deep structure of subduction-plate boundary. According to the Bouguer gravity and teleseismic data, we proved that there is a discontinuous sub-moho surface below the Moho surface of Songliao basin, basin, which indicates that the subduction velocity of the Pacific plate changes periodically, which further improves some details of the subduction process of the plate, which is of great significance to the analysis of the formation and evolution process of deep structures at the junction of the Pacific plate and the Eurasian plate.