The Moho depth map(1:5000000) in the land and seas of China and adjacent areas and its geological implications

The compilation and research on the Moho depth map have always been one of major issues in research on the structure of lithosphere.Based on various geophysical studies of the Moho depth in the past 50 years,we collect latest results from a serious of special investigationsin the recent years,and thus integrate these data of land and sea areas into one body.Based on gravity data,we use data from 120profiles(including seismic sounding profiles)as control points.On the basis of unified digital projection,we deal with gravity data by means of complete Bouguer correction,Glennie correction and other procedures,and make a reasonable regionalization in accordance with the structural characteristics in the scope of the map.Based on the optimization of separation methods of the gravity field and surface inversion methods,we compile the Moho Depth Map(1∶5000000)in the Land and Seas of China.According to the crustal structure and the distribution of the Moho depths,we delineate gradient belts,regionalize the map,summarize the characteristics of the Moho depth in each region and discuss the geological implications and the overall framework of East Asia shown on the Moho depth map.