【摘要】 天津—北京—赤城深地震测深剖面采用密集炮点和接收点距设计构成了较为完整的观测系统,利用该剖面地震测深资料研究华北东部裂陷盆地与燕山隆起地壳结构及构造耦合.结合该区域已有研究成果,进一步分析了张渤地震带东段的地震构造环境.结果显示,华北克拉通东部裂陷盆地结晶基底构造形态和界面结构性质与新生代以来的地壳构造运动密切相关,北侧燕山隆起区高速稳定和南侧裂陷盆地低速松散截然不同的地壳结构,使宝坻-桐柏、宁河-昌黎断裂构造分区线和燕山隆起之间的中间过渡带为张渤地震带东部平原区地震的孕发提供了良好的构造环境.更多还原

【Abstract】 A comparatively complete layout chart is built by using small shot interval and receiver spacing in Tianjin-Beijing-Chicheng Deep Seismic Sounding profile.Based on the DSS data of the profile,the crustal structure and the tectonic coupling are studied in the rift-depression basin of eastern North China and Yanshan uplift.Combining with the existing research findings in the region,the seismic structure environment is further analyzed in the eastern segment of Zhangjiakou-Bohai seismic belt.The result shows that the tectonic feature and interface structure of the crystalline basement in the rift-depression basin of eastern North China Craton are correlated with the tectonic movement since Cenozoic era,The entirely different crustal structures between the stable Yanshan uplift with high velocity in the north and the incompact rift basin with low velocity in the south make the intergradational zone between the tectonic zoning line,Baodi-Tongbai and Ninghe-Changli faults,and Yanshan uplift provide a favorable structural environment for generation and occurrence of earthquakes in the eastern plain region of Zhangjiakou-Bohai seismic belt.更多还原