The Correspondence Analysis Of The Satellite Gravity Anomalies With The Deep Lithosphere Structure Of The East China Sea

East China sea is lying among mainland China,Taiwan and Ryukyu Island, the Philippine Sea adjacent to the southeast, north of the Yellow Sea. It is the important part of the circum-Pacific tectonic belt and the important window of western Pacific marginal sea structure formation and evolution. It locates in the Philippine Sea plate and Eurasian plate collision zone, and its lithospheric structure is complex and rich in oil and gas resources.Gravity method is based on the density difference between the geologic body, and also it can use the satellite, aviation, marine vessels and other means of quick and efficient access to large regional gravity data. Therefore, the gravity data in the study of the deep Earth structure plays an important pole. Research methodology is based on the satellite gravity data to study the East China Sea regional lithospheric structure. In previous work, based on the interpretation of the results of seismic profiles, using gravity anomalies and modeling , the deep of Moho and lithosphere of the region can be inversed to provide the explanation on the gravity model. The studying is divided into the following steps :First, data collection and sorting , including topography ,satellite gravity anomalies, geological structure, lithology ,seismic interpretation section ,and also including the previous depth in the region on the structure of the lithosphere and research results of the analysis of geological cross-section area results, and data compilation, analysis, summary.Second, gravity data processing and interpretation: the terrain correction, water correction, the middle layer correction to calculate the Bouguer gravity anomaly; and according to the reference section of geological interpretation of gravity modeling to make the human-computer interaction model inversion, to bind Regional inversion; calculate of gravity anomalies and regional Yamane, and analyze the characteristics of gravity anomalies, to provide the basis for the interpretation; use upward continuation to separate Bouguer gravity anomaly field, and extraction of the Moho gravity anomaly, making the profile anti-play the results as a constraint, using Parker-Oldenburg density interface inversion method to obtain the deep of Moho; with results of previous studies and the deep of Moho to analyze the structure of the deep lithosphere.The studies show that Moho of the East China Sea region is"Two convex and two concave"and its depth range is 9-35km.The crust is from the East China Sea continental crust-the transitional oceanic crust-oceanic crust gradual transition.