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| 1 | Velocity structure of uppermost mantle beneath North China from Pn tomography and its implications显示文摘20301 Pn arrival time data are collected from the seismological bulletins of both national and regional seismic networks. Pn travel time residuals are tomographically inverted for the Pn velocity structure of uppermost mantle beneath North China. The result indicates that the average Pn velocity in North China is 7.92 km/s, and the velocity varies laterally from ?0.21 to +0.29 km/s around the average. The approximately NNE trending high and low velocity regions arrange alternatively west-eastward. From west to east we can see high velocity in the middle Ordos region, the Shanxi graben low, the Jizhong depression high, the west Shandong uplift and Bohai Sea low, and the high velocity region to the east of the Tanlu fault. In the southern boundary zone of the North China block, except for the high velocity in the Qingling Mountains region, the velocity is generally lower than the average. Obvious velocity anisotropy is seen in the Datong Cenozoic volcanic region, with the fast velocity direction in NNE-SSW. Notable velocity anisotropy is also seen around the Bay of Bohai Sea, and the fast velocity directions seem to show a rotation pattern, possibly indicating a flow-like deformation in the uppermost mantle there. The Pn velocity variations show a reversed correlation with the Earth's heat flow. The low Pn velocity regions generally show high heat flow, e.g., the Shanxi graben and Bohai Sea region. While the high Pn velocity regions usually manifest low heat flow, e.g., the region of Jizhong depression. This indicates that the Pn velocity variation in the study region is mainly aroused by the regional temperature difference in the uppermost mantle. Strong earthquakes in the crust tend to occur in the region with the abnormal low Pn velocity, or in the transition zone between high and low Pn velocity regions. The earthquakes in the low velocity region are shallower, while that in the transition zone are deeper. | WANG Suyun (汪素云) XU Zhonghuai (许忠淮) PEI Shunping (裴顺平) | 2003 | Science China Earth Sciences2003，46，z2： | 13 |
| 2 | Deep structure at northern margin of Tarim Basin显示文摘In this paper, a 2D velocity structure of the crust and the upper mantle of the northern margin of the Tarim Basin (TB) has been obtained by ray tracing and theoretical seismogram calculation under the condition of 2D lateral inhomogeneous medium using the data of seismic wide angle reflection/refraction profile from Baicheng to Da Qaidam crossing the Kuqa Depression (KD) and Tabei Uplift (TU). And along the Baicheng to Da Qaidam profile, 4 of the 10 shot points are located in the northern margin of the TB. The results show that the character of the crust is uniform on the whole between the KD and TU, but the depth of the layers, thickness of the crust and the velocity obviously vary along the profile. Thereinto, the variation of the crust thickness mainly occurs in the middle and lower crust. The Moho has an uplifting trend near the Baicheng shot point in KD and Luntai shot point in TU, and the thickness of the crust reduces to 42 km and 47 km in these two areas, respectively. The transition zone between the KD and TU has a thickest crust, up to 52 km. In this transition zone, there are high velocity anoma-lies in the upper crust, and low velocity anomalies in the lower crust, these velocity anomalies zone is near vertical, and the sediment above them is thicker than the other areas. According to the velocity distributions, the profile can be divided into three sections:KD, TU and transition zone between them. Each section has a special velocity structural feature, the form of the crystalline basement and the relationship between the deep structure and the shallow one. The differences of velocity and tectonic between eastern and western profile in the northern margin of the Tarim Basin (NMTB) may suggest different speed and intensity of the subduction from the Tarim basin to the Tianshan orogenic belt (TOB). | ZHAO JunMeng CHENG HongGang PEI ShunPing LIU HongBing ZHANG JianShi LIU BaoFeng | 2008 | Chinese Science Bulletin2008，53，10： | 10 |
| 3 | Tomographic structure of East Asia:I.No fast(slab) anomalies beneath 660 km discontinuity显示文摘This is the first of two papers that describes a regional tomography investigation,which combines P-wave arrival times of both regional and teleseismic earthquakes to obtain 3D mantle structures of East Asia up to 1 000 km depth.The most important findings of this tomography study are reported in this paper as follows.(1) No fast P-wave velocity anomalies can be related to subducted oceanic slabs beneath the 660 km discontinuity;instead the subducted oceanic slabs become flattened and stagnant within the transition zone.(2) The high velocity anomalies in the transition zone extend up to 1 500 km to the westward of the active trenches,which is a unique feature in the worldwide subduction systems.(3) Slow P-wave velocity anomalies are visible up to ~250 km underneath most of the East Asia on the east of 115°E,similar to the area of the stagnant slabs.These observations have important implications for the geodynamic process at depths beneath the East Asia,which might in turn control the widespread Cenozoic volcanism and associated extensional tectonics seen at the Earth's surface. | Shunping Pei Yongshun John Chen | 2010 | Earthquake Science2010，23，6： | 8 |
| 4 | Tomographic structure of East Asia:Ⅱ.Stagnant slab above 660 km discontinuity and its geodynamic implications显示文摘P-wave arrival times of both regional and teleseismic earthquakes were inverted to obtain mantle structures of East Asia.No fast(slab) velocity anomalies was not find beneath the 660-km discontinuity through tomography besides a stagnant slab within the transition zone.Slow P-wave velocity anomalies are present at depths of 100-250 km below the active volcanic arc and East Asia.The western end of the flat stagnant slab is about 1 500 km west to active trench and may also be correlated with prominent surface topographic break in eastern China.We suggested that active mantle convection might be operating within this horizontally expanded 'mantle wedge' above both the active subducting slabs and the stagnant flat slabs beneath much of the North China plain.Both the widespread Cenozoic volcanism and associated extensional basins in East Asia could be the manifestation of this vigorous upper mantle convection.Cold or thermal anomalies associated with the stagnant slabs above the 660-km discontinuity have not only caused a broad depression of the boundary due to its negative Clapeyron slope but also effectively shielded the asthenosphere and continental lithosphere above from any possible influence of mantle plumes in the lower mantle. | Yongshun John Chen Shunping Pei | 2010 | Earthquake Science2010，23，6： | 6 |
| 5 | Moho offset beneath the central Bangong-Nujiang suture of Tibetan Plateau显示文摘By analyzing teleseismic waveforms recorded by 53 stations of Hi-Climb profile passing through the central Bangong-Nujiang suture(BNS) ,a total of 4764 high-quality receiver functions are obtained.The average crustal thickness and Poisson's ratio beneath each station are estimated using the travel time of Ps and PpPs of the Moho.The discontinuities such as the Moho,the 410and 660-km interfaces are also studied using the common converted points(CCP) time to depth migration of receiver functions. The main results are as follows:(1) The Moho of Lhasa terrane and that of Qiangtang terrane nearby BNS are overridden and offset by~10 km.The structural geometry shows a northward uplifting and the southward deepening for the Moho of Lhasa terrane and Qiangtang terrane,respectively,which is related to the reactivated structure beneath BNS since Cenozoic era.(2) The variation range of Poisson's ratios along the profile is between 0.237 and 0.280,indicating that the crust is mainly composed of felsic and intermediate rocks.The anti-correlation between the crustal thickness and Poisson's ratio suggests that thicker crust beneath the southern Qiangtang terrane may be related to the successive thrust of felsic and intermediate rock of Lhasa terrane.(3) The thickness of the mantle transition zone along the profile remains about 255 km,implying that the tectonic activities caused by the India-Asia collision are confined to the depths above 410 km. | XU Qiang ZHAO JunMeng CUI ZhongXiong PEI ShunPing LIU HongBing | 2010 | Chinese Science Bulletin2010，55，7： | 4 |
| 6 | The updated crustal attenuation in North China using M_L amplitude tomography显示文摘We have updated the lateral variations of the quality factor Q0(Q at 1 Hz) beneath the crust of North China using ML amplitude tomography with near three times data.The data were selected from the Annual Bulletin of Chinese Earthquakes(ABCE) in 1985-2009,including 26 283 ML amplitude readings from 4 204 events recorded by 38 stations.The result is similar with previous research but has higher resolution.Estimated Q0 values are consistent with tectonic and topographic structure in North China.Q0 is low in the active tectonic regions having many faults,such as Bohai bay,North China basin,the Shanxi and Yinchuan grabens,while it is high in the stable Ordos craton.Q0 values are low in several topographically low-lying areas,such as the North China,Taikang-Hefei,and Subei-Huanghai Sea basins,whereas it is high in mountainous and uplift regions exhibiting surface expressions of crystalline basement rocks:the Yinshan,Yanshan,Taihang,Qinling and Dabie mountains,Luxi and Jiaoliao uplifts.Quality factor estimates are also consistent with Pn and Sn velocity patterns.High velocity values in general correspond with high Q0 and vice versa.This coincides with a common temperature influence in the crust and uppermost mantle. | Shunping Pei Yongshun John Chen | 2010 | Earthquake Science2010，23，6： | 2 |
| 7 | 准噶尔盆地基底构造显示文摘我们已完成了穿越准噶尔盆地及其周边地区的I-I、II-II、III-III、IV-IV和额敏—哈密剖面5条综合地球物理剖面。通过综合研究,初步了解准噶尔盆地及邻近地区的地球动力学问题:准噶尔盆地基底由北部的乌伦古地体和南部的玛纳斯地体组成。两者的分界为西西北方向的滴水泉—三个泉缝合线。其西部与北东向Dalbutte缝合带相连,东部与北西向的Cranamary缝合带相连。准噶尔盆地北部的乌伦古地体基底为双层构造,上层为泥盆系和下石炭统组成的褶皱基底,大致表现为北厚(3~5 km)、南薄(1~2 km)。缝合线以南的玛纳斯地体为单层基底,即新元古代结晶基底。准噶尔盆地地壳厚度为44~52 km,北薄南厚。周边山区地壳厚度高于盆地地区。盆地及邻近地区地壳分为上、中、下层,并且中地壳一般较薄。盆地地区的地壳存在多条深断裂。南北方向发育了6条主要深断裂,分别为红车、德伦山、石溪、呼图壁、彩南和阜康。这些断层倾角较大,向上延伸至上地壳下部,向下切入地壳基底界面。壳内水平构造和构造面无明显垂向断层,似有“开放断层”特征。这些断层是上地幔物质挤入地壳的良好通道。此外,该地区还有两条主要的横向深断层。一是北西西走向的滴水泉—三个泉深断裂,它向南倾斜,具有逆断层性质,可能会破坏滴水泉—三个泉缝合带。另一条是近东西向的昌吉—玛纳斯深断裂,向南倾斜,主要发育在中下地壳,具有逆断层性质。这些深断裂对盆地构造发育具有一定的控制作用。准噶尔盆地西部的莫霍面基本连续地延伸到了天山的莫霍面,并且后者的莫霍面深度明显大于前者。但是,盆地东部的莫霍面与博格达山脉的莫霍面并不连续。前者以叠加关系延伸到后者之下,表明盆地东部的地壳向博格达山脉俯冲。这有助于解释天山东部构造活动相对减弱而博格达山脉向北推高的构造地貌现象。周边准噶尔盆地具有挤压盆地山地构造耦合格局,尤其是南部边界东部博格达—准东盆地的山地盆地构造耦合。现在将准噶尔盆地与吐哈盆地分开的博格达山脉是年轻的、仍在上升的山脉。博格达山的隆升是印支运动以来多次推覆造山运动的反映,其现貌是新近纪以来新构造运动的结果。准噶尔盆地盖层发育经历了3个阶段:与天山和松潘—甘孜造山带形成有关的二叠纪—三叠纪前陆盆地阶段,区域压缩较弱的侏罗纪—早始新世陆内坳陷阶段,以及新近纪晚期以来与天山抬升有关的活化前陆盆地阶段。 | Xiaojun WANG Yong SONG Baoli BIAN Junmeng ZHAO Heng ZHANG Maodu YAN Shunping PEI Qiang XU Shuaijun WANG Hongbing LIU Changhui JU | 2021 | 地学前缘2021，28，6： | 2 |
| 8 | Lower crustal attenuation in northeastern Tibetan Plateau from ML amplitude显示文摘This study investigated the crustal attenuation structures of Sg and Lg waves of the northeastern Tibetan Plateau.We collected ML amplitude data recorded at 168 permanent stations between 1985 and 2016 and 11 temporary broadband stations between 2014 and 2016.Detailed Q0 variation maps of Sg and Lg waves were obtained by applying ML amplitude tomography.The average Q0 values of the Sg and Lg wave were 440 and 220,respectively.Relatively high attenuation anomalies of both waves appeared in the central and eastern regions of the Bayan Har Block and the east edge of the Qiangtang Block,which may be related to partial melting,high geotemperature,and strong tectonic processes.High attenuation anomalies were also found in the Qilian Orogenic Belt and Hetao Graben,which may be related to their active tectonic behavior and densely distributed faults.The relatively low attenuation anomalies of both waves were revealed in the Alax and Ordos blocks,Qaidam,Tarim,Qinghai Lake,and Gonghe basins,which can be explained by the tectonically stable properties and ancient composition of geological elements.These results indicate that the path between the highly attenuated lower crust of the Bayan Har Block and the Qilian Orogenic Belt is obstructed by three adjacent low attenuated areas(i.e.,the Qilian,Qinghai Lake,and Gonghe basins);thus,it appears unlikely that a crustal flow channel from the interior of the Tibetan Plateau to the Qilian Orogenic Belt will form. | Yanbing Liu Shunping Pei | 2021 | Earthquake Science2021，34，4： | 1 |
| 9 | Land subsidence caused by groundwater exploitation in Suzhou City, China 显示文摘 | Chongxi Chen Shunping Pei Jiu Jimmy Jiao | 2003 | Hydrogeology Journal2003，11，： | 1 |
| 10 | Land subsidence caused by groundwater exploitation in Suzhou City,China显示文摘 | Chongxi Chen Shunping Pei Jiu Jiao | 2003 | Hydrogeology Journal2003，11，2： | 1 |
| 11 | Was Wuhan the early epicenter of the COVID-19 pandemic?——a critique显示文摘Recently, Worobey et al.(2022) published a report entitled ‘The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic' that succinctly summarizes their study [1]. A pre-print version of this study had earlier elicited a series of highprofile media coverages [2,3]. All these reports deliver a social-political message that the Huanan market is the epicenter of COVID-19. | Yanan Cao Lingling Chen Hua Chen Yupeng Cun Xiaofeng Dai Hongli Du Feng Gao Fengbiao Guo Yalong Guo Pei Hao Shunmin He Shunping He XiongLei He Zheng Hu Boon-Peng Hoh Xin Jin Qian Jiang Qinghua Jiang Asifullah Khan Hong-Zhi Kong Jinchen Li Shuai Cheng Li Ying Li Qiang Lin Jianquan Liu Qi Liu Jian Lu Xuemei Lu Shujin Luo Qinghua Nie Zilong Qiu Tieliu Shi Xiaofeng Song Jianzhong Su Sheng-ce Tao Chaolong Wang Chuan-Chao Wang Guo-Dong Wang Jiguang Wang Qi Wu Shaoyuan Wu Shuhua Xu Yu Xue Wenjun Yang Zhaohui Yang Kai Ye Yuan-Nong Ye Li Yu Fangqing Zhao Yiqiang Zhao Weiwei Zhai Dandan Zhang Liye Zhang Houfeng Zheng Qi Zhou Tianqi Zhu Ya-ping Zhang | 2023 | National Science Review2023，10，4： | 0 |
| 12 | 尼泊尔喜马拉雅山脉中央丘里亚冲断层的电子自旋共振测年显示文摘利用断层泥样品中石英颗粒的ESR信号,研究尼泊尔喜马拉雅山脉南段中央丘里亚冲断层(CCT)第四纪断层活动的时间模式。为了更好地理解重置过程,分析了不同石英粒度的ESR信号、累积剂量和年龄的变化。样品CCT3的E1’中心(ESR定年的一种信号)的ESR强度结果显示,大块、粗粒(200~250 μm)和细粒(40~80 μm)粒度组分存在显著的空间变化。第四纪断层的ESR数据,粗年龄为(5±0.5) ka,细分数平均年龄为(50±10) ka,显示了西瓦利克地区最近的伸展事件。 | NEUPANE Bhupati ZHAO Junmeng LIU Chunru PEI Shunping MAHARJAN Bishal DHAKAL Sanjev | 2023 | 地学前缘2023，30，4： | 0 |
| 13 | Pn wave velocity and anisotropy beneath Pamir and its adjacent regions显示文摘As the western end point of continental collision between the Indian and Eurasian plates, Pamir is an ideal place to research uplifting mechanisms in the Tibetan plateau. In this study, 141 644 Pn arrivals were used to obtain seismic wave velocities and anisotropy in the uppermost mantle beneath Pamir and its adjacent regions by performing tomographic inversion of Pn travel times. The data were selected from multiple databases, including ISC/EHB, the Annual Bulletin of Chinese Earthquakes, and regional bulletins of Xinjiang. The tomography results reveal significant features with high resolution and correlate well with geological structures. The main results are as follows: (1) The Pn wave velocities are particularly high in the old stable blocks such as Tarim basin, Indian plate and Tajik basin, while the low Pn velocities always lie in tectonically active regions like the western Tibetan plateau, Pamir, Tianshan and Hindu Kush. (2) Strong Pn anisotropy is found beneath the Indian-Eurasian collision zone; its direction is parallel to the collision arc and nearly perpendicular to both the direction of maximum compression stress and relative crustal movement. The result is probably caused by the pure shear deformation in the uppermost mantle of the collision zone. (3) A geodynamic continent-continent collision model is proposed to show anisotropy and collision mechanisms between the Indian plate and the Tarim and Tajik basins. | Biao Feng Shunping Pei | 2012 | Earthquake Science2012，25，5： | 0 |
| 14 | A global comparison of V_(p),V_(s),and V_(p)/V_(s) structures of the mantle lithosphere beneath major cratons显示文摘Cratons formed due to the specific melting regime of the primitive mantle with elevated mantle temperature during Archean.However,each craton has undergone a distinct evolution history,and some have lost their stability.To investigate to what degree cratons in comparison with one another have been modified from their analogous initial form,we employed Sn-Pn differential(PSn) traveltimes to derive Vp/Vsratio,which is thought to be related to Mg# of the uppermantle.We assessed Pn,Sn,and PSn data using three datasets based on epicentral distance:(1) 2°–12°,(2) 2°–7°,and(3) 7°–12°.The results suggest that most cratons show comparable seismic properties with high velocities and low Vp/Vsratio,implying a highly depleted uppermost mantle that resembles the original residue from the partial melt extraction of the primitive mantle during the Archean.Conversely,the Eastern North China Craton(ENCC) displays the lowest P-and S-wave velocities,and noticeable high Vp/Vsratios in all datasets,implying a systematic difference with other cratons.This observation suggests a scenario of total removal of the depleted Archean mantle lithosphere beneath the ENCC.In contrast,the Ordos Block located at the western part of the North China Craton(WNCC) shows velocities and Vp/Vsratio comparable with those of the typical cratons,suggesting that it has still maintained its Archean mantle lithosphere.The Wyoming Craton has a high Vp/Vsratio similar to that of the ENCC and a high Pwave velocity comparable to that of the typical cratons.These features suggest that the Archean mantle lithosphere has been significantly modified rather than totally removed and replaced by a younger fertile mantle.The Indian Craton presents a low Vp/Vsratio and comparatively high velocities at shallow parts of the mantle lithosphere but a high Vp/Vsratio at deeper parts similar to that of the ENCC,suggesting a partial modification of the Indian Craton at deeper parts. | Ehsan BARZGAR Fenglin NIU Shunping PEI | 2023 | Science China Earth Sciences2023，66，3： | 0 |
| 15 | Upper-Mantle Velocity Heterogeneity of Eastern Tibetan Plateau from Teleseismic P-Wave Tomography and Its Tectonic Implications显示文摘An attempt has been made to reveal the upper mantle velocity structure of the eastern Tibetan Plateau using 628 teleseismic events recorded from 2003 to 2009 at 95 stations.A total of 8 532 Pwave arrival time residuals were inverted by using the FMTOMO(fast marching tomography) software package.Tomographic results show upper mantle velocity heterogeneity in many aspects.In the southern part visible high velocity anomaly is denoted as the Indian lithosphere.This part seems to be affected by slab tearing at 940E longitude as it is located on the eastern Himalayan syntaxis(EHS).The high velocity zone down to 500 km depth in the northern part could be the Asian lithosphere.At the central part some high velocity anomalies can be identified as detached patches of the lithosphere,surrounded by low velocity anomalies.These anomalies are the potential to create thermal convection and trigger plateau uplift or plateau growth.Sudden velocity change occurs on both sides of patches where low velocity anomaly is visible in between patches and Bangong-Nujiang suture even in between Songpan-Ganzi terrain and Asian Plate.In both cases intense low velocity zone spread down to 500 km.The depth range of low velocity anomalies in between two plates observed from 200 to-500 km.Hence the low velocity anomalies detected in our results may reflect either the hot asthenosphere upwelling or the mantle wedge due to the presence of the cold lithosphere. | Shahpara Sheikh Dola Junmeng Zhao Heng Zhang Shunping Pei | 2023 | Journal of Earth Science2023，34，1： | 0 |
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