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横切渤中凹陷的长电缆地震剖面长约100km,记录时间达14s,探测深度超过莫霍面深达地幔。长电缆地震反射剖面揭示了渤中凹陷莫霍面起伏特征。综合分析认为,渤中凹陷古近纪及新近纪的快速沉降主要是在深部地幔物质上涌及板块之间的相互作用双重动力学背景下形成的;渤海湾盆地整体上表现出以裂陷作用为主、拉分作用为辅的联合形成机制。
The long cable cross-section of the Bozhong Sag is about 100 km long in length with a record time of 14 s and a detection depth exceeding that of the Moho up to the mantle. The long cable seismic reflection profile reveals the Moho fluctuation in the Bozhong Depression. The comprehensive analysis shows that the rapid subsidence of the Paleogene and Neogene in the Bozhong Sag was mainly formed under the background of dual dynamics of the upwelling of the mantle material and the interaction between the plates. The Bohai Bay Basin, as a whole, Mainly based on the role of sub-division of the joint formation mechanism.