Deep Structure Characteristics and Geological Evolution in Yellow Sea and Adjacent Region

The information of faults was obtained by various processing of Bouguer gravity data in the Yellow Sea and adjacent regions. The distribution of crust thickness in the research region is also obtained. Based upon geological and geophysical comprehensive analysis and after comparing with the result of seismic tomography, it is considered that the west marginal fault zone of Korean Peninsula and the south marginal fault zone of Cheju Island are deep and great faults. The velocity structures on the two sides of these faults are quite different. It is concluded that the Korean Peninsula and the South Yellow Sea belong to different geological units. From a comprehensive analysis of lithosphere structure, it is believed that the contacting relationship between Sino‐Korea and Yangtze blocks is that Yangtze block overthrusts on the Sino‐Korea block. According to the results of seismic tomography, gravity and crust thickness of the research region, it is still difficult to determine the exact location of the boundary belt between Yangtze block and south China block in the Yellow Sea.