摘要
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。
There is a long-cable seismic reflection section across Bozhong depression, which is about 100 km long and recorded in two way travel time up to 14 s, with its detection depth over Moho depth and into mantle. Therefore, Moho behavior in the depression can be revealed by the long cable seismic section. According to a comprehensive a nalysis, it is considered that the rapid subsidence of Bozhong depression during Paleogene and Neo gene has developed under a double dynamic setting, i.e. upwelling of deep mantle material and interaction among tectonic plates. As a whole, Bohal Bay basin is characterized by a combined formation mechanism, dominated by rifting and supplemented by pull-apart process.
出处
《中国海上油气》
CAS
2008年第5期302-304,共3页
China Offshore Oil and Gas
基金
国家“十五”重大科技攻关项目(2003BA613A05)部分研究成果
关键词
长电缆地震
莫霍面特征
渤中凹陷
渤海湾盆地
形成机制
long cable seismic
Moho behavior
Bozhong depression
Bohai Bay basin
formationmechanism
