The Distribution of Mesozoic in the Southern Part of East China Sea Shelf Basin

On the basis of the well drilling data from the southern part of East China Sea shelf basin, the 2D reflection characteristics of Mesozoic have been calibrated after processing. Through interpretation it is believed that Mesozoic strata distribute widely in the southern part of East China Sea shelf basin, with area over 10×10⁴ km², and the Mesozoic sedimentation period lasted for a very long time, and the residual thickness is over 5 000 m in part of the Mesozoic deep depression. Influenced by regional tectonic movements and the igneous rocks deposited during the late period of Mesozoic, uplifting and erosion occurred in some areas,and thick Mesozoic deposits remained in other areas. The Mesozoic are well developed in the southeast part of the study area, and the middle-lower Jurassic with great thickness are also well developed, with good geologic conditions for HC generation, being favorable area for HC exploration.