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| 1 | 爆破地震揭示的华北西部高分辨基底速度结构显示文摘利用在华北克拉通西部完成的两条高分辨折射探测剖面获得的21炮Pg波资料,在对不同构造区Pg波的运动学与动力学特征分析对比的基础上、采用有限差分反演方法构建了两剖面的基底结构模型.研究结果不仅清晰地标定了主要断裂的位置及形态,还反映出不同构造区基底埋深和速度结构的差异.鄂尔多斯地块的基底埋深在4.5~5.5 km间、起伏变化不大,且速度梯度横向变化不甚明显,结合Pg波走时平稳、追踪远等地震学现象,揭示出鄂尔多斯地块浅表沉积和基底结构比较稳定;贺兰山和银川盆地两者不仅在地形地貌上差异显著,其基底埋深从2.0~4.0 km的较大变化以及速度结构显著的横向非均匀性足以表明两者之间垂直差异运动及变形的强烈程度.银川盆地Pg波走时趋势与速度结构图像基本反映了基底局部坳陷的形态特征和新生代沉积厚、速度低的客观现象;弧形构造区地处祁连、阿拉善、鄂尔多斯三者相互作用的复杂构造环境之中,基底埋深6.0 km的巨厚坳陷与相邻仅2.0 km厚的基底隆起形成较大反差,这与印度板块和欧亚板块强烈的碰撞推挤致使在青藏高原东北缘多个构造块体交汇复合部位呈现变形强烈、极度不稳定的基底结构密切相关.鄂尔多斯块体基底呈现西深东浅特征及周缘基底强烈的横向不均匀性、挤压褶皱变形及断裂带的发育,均反映了青藏高原NE向的持续挤压运动遭到了鄂尔多斯块体的阻挡. | 赵金仁 范振宇 刘保金 马策军 邓晓果 宋向辉 刘宝峰 王帅军 海燕 李怡青 | 2017 | 科学通报2017，62，36： | 3 |
| 2 | Crustal structure of the southeastern margin of the Ordos Block显示文摘我们由 teleseismic 接收装置功能组成使用侧面学习厄多斯·布洛克的东南的边缘的外壳的厚度和结构。Mohorovii 断绝(莫霍) 在所有车站下面被识别了。它的深度逐渐地向东南减少,从在到 Qinling Orogen 的北边缘附近的 30 km 的厄多斯·布洛克的大约 43 km。我们的结果在外壳的结构和莫霍的特征显示出清楚的侧面的变化。因此,学习区域能被划分成四部分:(1 ) 在厄多斯·布洛克,下面,莫霍在 40 km 的深度可见、扁平。外壳的结构被稳定的 cratonic 外壳最好描绘。(2 ) 在 Weihe 山西 Graben,莫霍被大约 3 km 高举,它可以是上面的披风材料的 upwelling 的结果。(3 ) 在 Xionger-Funiu 山下面,莫霍在在 36 和 33 km 之间的深度是扁平的,但是向东南变得更浅。(4 ) 在 Hehuai 盆,邻近 Qinling Orogen 的北边缘,莫霍与 31 km 的吝啬的深度显示出强壮的侧面的变化。这里的外壳的结构是复杂的,它可以显示复杂构造环境。另外,莫霍清楚地在二个地点被打断(在车站 st11 和 st18 下面) 近主要的构造边界。这些结果建议沿着厄多斯·布洛克的东南的边缘的深外壳的结构有大侧面的可变性,它强烈在表面上影响复杂地质的特征。而且,这些结果能帮助我们理解厄多斯·布洛克的东南的边缘的不同部分的相互关系。 | LU YiFeng XU MingJie WANG LiangShu MI Ning LI Hua YU DaYong | 2011 | Chinese Science Bulletin2011，56，35： | 2 |
| 3 | Crustal velocity structures and their tectonic implications in different tectonic block regions of the Chinese mainland显示文摘In this paper,the typical velocity structures and average velocities of the crust in six different active tectonic block regions are presented on the basis of previous studies and their tectonic implications are discussed. The results show that different tectonic units have different features of crustal velocity structures. In general,there are low velocity distributions in the crust in regions with strong tectonic activities,and the scales of low velocity distributions are related to the tectonic activities. The average velocities are relatively low in such regions. This reflects strong crustal deformation and the variations of states of matter in the crust resulting from strong tectonic movements. These regions are also seismically active zones frequented by strong earthquakes. Therefore,studying crustal velocity structures of these regions is of great importance to understanding crustal geodynamic process and seismogenic tectonic background. | Xiankang Zhang Yonghong Duan Jinren Zhao Chengke Zhang Shixu Jia Jianshi Zhang Fuyun Wang Zhuoxin Yang Suzhen Pan | 2009 | Earthquake Science2009，22，4： | 0 |
| 4 | Regional characteristics of the lithospheric structure in the southeast of North China revealed by explosion seismology显示文摘Based on the blasting seismic detection data obtained in the southeast of North China in recent years,this paper comprehensively analyzes and studies the crust-mantle lithospheric structure and seismological characteristics of different tectonic regions,such as offshore basins,west Shandong uplift,Tanlu fault zone and Jiangsu-Shandong orogenic belt.The low-velocity Pg waves in Dongying depression and Northern Jiangsu basin reveal the unstable basement structure with extremely thick sediments.The travel time of Pg wave is characterized by relatively low propagation velocity and small crustal thickness of offshore continental margin;the first break time and high apparent velocity of Pg wave in west Shandong uplift indicate that the sedimentary basement is relatively thin.The Pm wave shows the characteristic of dominant wave in the first-order velocity discontinuity of the crust-mantle interface,which reflects the high crustal velocity and stable structure in west Shandong uplift.The Pm and Pl wave are obviously complicated,which can reflect the crust-mantle lithospheric structure of the transitional zone between Tanlu fault zone and Jiangsu-Shandong orogenic belt.The small time difference between Pn and PL waves can be regarded as the highly destructive seismological manifestation of Tanlu fault zone on the crust-lithosphere scale.Based on many geophysical phenomena such as electrical structure,density structure and terrestrial heat flow,it is believed that the lithospheric destruction degree of Tanlu fault zone and Jiangsu-Shandong orogenic belt was high during the destruction of the North China Craton. | Zhenyu Fan Jinren Zhao Cejun Ma Mingxin Qu Xiaoguo Deng Baofeng Liu Yan Hai | 2021 | Geodesy and Geodynamics2021，12，2： | 0 |
| 5 | Multiple phases analysis of deep seismic sounding records in North China Craton显示文摘The North China Craton(NCC)is a key region to study the destruction of the ancient craton.Two groups of phases(denoted as'Pw1'and'Pw2'),which are parallel to the PmP phase reflected from the Moho discontinuity and the PLP phase reflected from the Lithosphere and Asthenosphere Boundary(LAB)respectively,are found on the record section of the Rongcheng-XinzhouAlxa long-range deep seismic sounding profile.The nature of the two phases is still unclear,although they are clearly observable and reverberant.In this paper,we use travel time inversion and amplitude forward modelling to fit the reflected and refracted phases in the lithosphere.The results show:(1)the Pw1 is a multiple reflected phase which is successively reflected by the crystalline basement,the surface,the Moho and then finally received on the surface;(2)the Pw2 phase is also a multiple reflected phase successively reflected by the crystalline basement,the surface,the LAB interface and then received on the surface.We conclude that the significant velocity difference between the thick sedimentary cover and the crystalline basement in the North China rifted basin may be the main reason for generating the multiple reflections.Furthermore,the two multiple reflections provide potent constraints on the lithospheric velocity model,and constitute seismological evidence for the lithospheric thinning in the eastern NCC. | Xiaoqing Zhang Jiyan Lin Minghui Zhang Zhi Liu Baofeng Liu Youshan Liu Tao Xu Zhiming Bai | 2020 | Earthquake Science2020，33，1： | 0 |
| 6 | Study on the basement structure in the southeastern North China by blasting seismic显示文摘Since the Mesozoic, southeastern North China Craton has experienced intense crustal thinning and lithosphere destruction. Some of the responses of the deep activity in the upper crust crystalline basement have been retained in a series of tectonic evolution. The study of the upper crust velocity structure,especially the properties of the basement interface, is of great significance for studying the tectonic evolution and seismic hazard in the southeastern part of North China. In this study, we selected Pg waves of the blasting seismic data in the southeastern part of North China in recent years, which reflect the west Shandong uplift, offshore sedimentary basins and the Tanlu Fault zone and the Sulu orogenic transition zone, to study the structural and seismological characteristics of basement in North China Craton. The results of this study showed as follows: First, the obvious lag of Pg wave arrival time in Dongying depression and North Jiangsu basin reveals the thick sedimentary, low velocity and unstable basement structure. Second, the advance Pg wave arrival time with high apparent velocity, which reflects the basement structure of the west Shandong uplift, indicates the thin sediments and the shallow basement. Third, combined with many geophysical phenomena, such as electrical structure, density structure and terrestrial heat flow, we hold that the Tanlu tectonic belt and the Sulu orogenic belt have experienced great lithosphere destruction and there is shallow crust and the thinnest lithosphere in the vicinity of the Tanlu fault zone. | Zhenyu Fan Jinren Zhao Suzhen Pan Cejun Ma Mingxin Qu Yan Hai Xiaoguo Deng | 2018 | Geodesy and Geodynamics2018，9，4： | 0 |
| 7 | The v_P Velocity Structures of Sub-blocks in the North China Craton from Active Source Waveform Modeling and Tectonic Implications显示文摘We present the 1-D crustal velocity structure of the major tectonic blocks of the North China Craton(NCC)along 36°N based on synthetic seismogram modeling of long-range wide-angle reflection/refraction data.This profile extends from southwest Yan’an of central Shaanxi Province of China(109.47°E),across the southern Trans-North China Orogen(TNCO),the southwestern part of the North China Plain(NCP),the Luxi Uplift(LU)and the Sulu Orogen(SLO),ending at Qingdao City of Shandong Province,the eastern margin of China(120.12°E)along 36°N.We utilized reflectivity synthetic seismogram modeling of the active source data to develop 1-D velocity structures of the sub-blocks of the NCC.Our final model shows that the NCC crust varies remarkably among the tectonic units with different velocity structure features.Higher lower crustal velocity and Moho depth^42 km is a major feature of the crust beneath southern Ordos Blockt.The TNCO which is composed of Lyuliangshan Mountains(LM),Shanxi Graben(SXG)and Taihangshan Mountains(TM)shows dominant trans-orogenic features.The NCP shows a dominant thickening of sediments,sharp crust thinning with Moho depth^32 km and significant lower average velocity.The SLO and the LU shows a stratified crust,higher average velocity and crust thinning with Moho depth of^35 km.Our model shows the coincidence between the deep structure and the surface geology among all the tectonic sub-blocks of the NCC. | LIU Hanqi TIAN Xiaofeng LIU Baofeng WANG Honglei | 2019 | Earthquake Research in China2019，33，2： | 0 |
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