DEEP STRUCTURE CHARACTERISTICS AND GEOLOGICAL EVOLUTION OF THE YELLOW SEA AND ITS ADJACENT REGIONS
黄海及其邻区深部结构特点与地质演化

The information of faults is obtained by various processing of Bouguer gravity data in the Yellow sea and its adjaceat regions. The distribution of crust thickness in this 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 the Korean Peninsula and the south marginal fault zone of the Cheju Island are deep and great faults. The velocity structure at the both 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 comprehensive analysis of lithosphere structure, it is believed that the contacting relationship between the Sino-Korea and Yangtze blocks is that the 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 the Yangtze block and Huanan (South China) block in Yellow Sea.