Characteristics and origin of disaster geological bodies in the northern outer shelf of the East China Sea and its adjacent areas

Based on the high-resolution shallow seismic profiles measured in the northern outer shelf of the East China Sea by the "1:1000, 000 marine regional geological survey" project, the authors summarized the internal reflection structure, external morphology and other seismic reflection characteristics of the disaster geological bodies in the northern outer shelf of East ChinaSea, and identified various types of hazard geological bodies such as high angle active faults, submarine volcanoes, magmatic diapirs, submarine landslides, buried ancient channels and buried ancient delta and tidal sand ridges. The distribution, genetic mechanism of various disaster geological bodies were concluded, and the influence of disaster geological bodies on marine oil and gas exploration and marine engineering construction were discussed. The identification of these disaster geological bodies can provide valuable references for the marine production activities and engineering construction in the study area.