Crustal Structure of the Rift‐Depression Basin and Yanshan Uplift in the Northeast Part of North China
Crustal Structure of the Rift‐Depression Basin and Yanshan Uplift in the Northeast Part of North China
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DOI：
10.1002/cjg2.1326
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Shixu Jia;Cheng-ke Zhang;Jin-ren Zhao;S. Fang;Z. Liu;Junmeng Zhao
中科院分区：
文献类型：
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作者：
Shixu Jia;Cheng-ke Zhang;Jin-ren Zhao;S. Fang;Z. Liu;Junmeng Zhao
在天津-北京-赤城深地震测深剖面上，利用小炮距和接收井距建立了较为完整的布设图版。根据剖面测深资料，研究了北中国东部裂陷盆地和燕山隆起的地壳结构及构造耦合关系。在已有研究的基础上，进一步分析了张家口-渤海地震带东段的地震构造环境。结果表明，中国克拉通东部裂陷盆地结晶基底的构造特征和界面结构与新生代以来的大地构造运动密切相关。北部稳定的高速燕山隆起和南部松散的低速裂谷盆地之间截然不同的地壳结构，使构造分区线、宝迪-桐柏断裂和宁河-昌黎断裂之间的过渡带和燕山隆起为张家口-渤海地震带东部平原区地震的孕育和发震提供了有利的构造环境。
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 mountain uplift. Based on the existing researches 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 geotectonic 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.