【摘要】 对渤海海峡区域进行了多条多道地震剖面探测。根据区域地质资料和剖面特征,划分6个地震地层单元U1-U6。其中U1为末次冰消期初期和全新世泥质沉积,大约形成于15ka至今。U2为晚更新世地层,大约形成于71ka至末次冰消期初。同时根据区域断裂系统特点,对该区断层分布特点及其稳定性进行分析。该区断层主要为正断层,海峡西侧分布较少,海峡东侧断点密集。除海峡东侧的2号测线中一条断裂断至海底外,其余全部断层均在T2反射界面以下,推测其活动时间为晚更新世晚期之前。更多还原

【Abstract】 Seismic refelection profiling is applied to the study of Bohai Strait.The stratum underwater is divided into six seismic unit according seismic stratigraphy,where U1is mud deposit during the Holocene and the last deglaciation since 15ka ago and U2is late pleistocene.Based on the previous research of fault system in the Bohai Strain,the authors analysis the distribution characteristics and stability of fault.Profiles reveal that shallow fault system developed mainly before late pleistocene,forming normal fault and graben and horst.In line2afault run through the seafloor and be infered a active fault.The most recent active age of all the other faults was in Holocene acording those fault points in profiles.更多还原