Characteristics of seismostratigraphy and analysis of structurallithofacies in the southern Yellow Sea Cenozoic basin

In this paper,the upper structural layer of the southern Yellow Sea Basin (SYSB) is further divided into three layers based on the latest obtained high-resolution single-channel seismic profiles.Combined with the borehole data,the characteristics and evolvement of structure and environment since middle-late Tertiary are discussed.The study shows that the acoustic-base indicated by shallow seismic profiles represents the basic shape of the SYSB in late Oligocene-early Miocene.Based on the comprehensive analysis of some typical profiles crossing the basin about seismostratigraphy,gravity and magnetics,the basin about seismostratigraphy,gravity and magnetics,the basin edge fault and some basin inner structure are identified.Furthermore,the acoustic-base is classified into four types of basal lithofacies:Eogene basin basement,Paleozoic basement,Mesozoic basement and magma intrusion basement.