• You are welcome to ERC!
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 20次   下载   
分享到: 微信 更多
基于主动源探测的华北不同块体构造特征研究
刘汉奇,田晓峰,刘宝峰,王红蕾
Author NameAffiliationE-mail
Hanqi Liu Geophysical Exploration Center,China Earthquake Administration,Zhengzhou tianxf@gec.ac.cn 
Xiaofeng Tian Geophysical Exploration Center,China Earthquake Administration,Zhengzhou woodstian@163.com 
Baofeng Liu Geophysical Exploration Center,China Earthquake Administration,Zhengzhou  
Honglei Wang Hebei Earthquake Agency,Shijiazhuang  
摘要:
关键词:  华北克拉通,地壳速度结构,克拉通破坏,宽角反射/折射
DOI:
分类号:
基金项目:国家自然科学基金(41574084, 41774071)资助。
Synthetic Seismogram Modeling Velocity structures for sub-blocks of the North China Craton from active-source seismic data and their tectonic implications
Hanqi Liu,Xiaofeng Tian,Baofeng Liu,Honglei Wang
Abstract:
We present the 1d crustal velocity structure of the major tectonic blocks of the North China Craton (NCC) along Lat. 36°N based on synthetic seismogram modeling long-range wide-angle reflection/refraction data. This profile extends from southwest Yan-an of central Shaanxi Province of China (Lon. 109.47°E), across the southern Trans-North China Orogen (TNCO), the southwestern of the North China Plain (NCP), the Luxi Uplift (LU) and Sulu Orogeny (SLO), ending at Qingdao city of Shandong Province, the eastern margin of China (Lon. 120.12°E) along Lat. 36°N. We utilized reflectivity synthetic seismogram modeling the active source data to develop 1d velocity structures of the sub-blocks of the NCC. Our final model shows that the NCC crust is remarkable variation among the tectonic units with different velocity structure features. Higher lower crustal velocity and Moho depth ~42 km is a major feature of the south Ordos block’s crust. The TNCO which is composed of Lyuliangshan Mountain (LM), Shanxi Graben (SXG) and Taihangshan Mountain (TM) shows dominant trans-orogenic features. The NCP shows dominantly thickening sediment, sharply crust thinning with Moho depth ~32km and significantly lower average velocity. The SLO and the LU shows stratified crust, higher average velocity and crust thinning with Moho depth of ~35 km. Our model shows the coincidence between the deep strucutre and the surface geology among all the tectonic sub-blocks of the NCC.
Key words:  North China Craton  crustal velocity structure  craton destructure  wide-angle reflection/refraction