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| 1 | The application of large volume airgun sources to the onshore-offshore seismic surveys: implication of the experimental results in northern South China Sea显示文摘Onshore-offshore seismic experiments were carried out for the first time in northern South China Sea using large volume airgun sources at sea and seismic stations on land. The experimental results indicate that seismic signals from the new airgun array of R/V Shiyan 2 can be detected as far as 255 km. The signal effective area reaches nearly 50000 km2, which covers Hong Kong and Pearl River Delta. Compared with the old airgun array, the signal amplitude, propagation distance and effective area of the new airgun array have been increased notably, which demonstrates that the upgrade of the airgun source was successful. Comparisons with previous experimental results in other regions show that the shooting effect of the new airgun array is similar to those best airgun sources in the world. Especially, it is a new breakthrough in using the permanent seismic stations onshore to record long distance airgun signals offshore, which has great significance to the realization of the 'seismic radar' concept and the 3D seismic surveys of crustal structure in coastal areas. | QIU XueLin CHEN Yong ZHU RiXiang XU HuiLong SHI XiaoBin YE ChunMing ZHAO MingHui XIA ShaoHong | 2007 | Chinese Science Bulletin2007，52，4： | 27 |
| 2 | A new way to generate seismic waves for continental crustal exploration显示文摘An airgun experiment was conducted in a reservoir,with the total volume of the airgun array being 6000 cubic inch. The energy released by one excitation was estimated to be 6.68×106 J,which corresponded to a 3.4 kg TNT explosion. A 180 km long profile composed of 100 portable short period seismometers was deployed as a receiver system of the airgun signals. Two remarkable results can be drawn from the experiment: (1) the airgun explosion is harmless to the dam and the fish,and this kind of airguns can be regarded as a green and environmental protection seismic source on land; (2) seismic wave gener-ated by this airgun source can be recorded by permanent stations with offset larger than 200 km. And the wave amplitudes recorded by nearby and remote stations are equivalent to the wave generated by 800 kg dynamite explosion. The airguns can be used as a light to illuminate the continental crustal structure of an area of about 100000 km2. | CHEN Yong ZHANG XianKang QIU XueLin GE HongKui LIU BaoJin WANG BaoShan | 2007 | Chinese Science Bulletin2007，52，16： | 24 |
| 3 | Characteristics of the crustal structure and hypocentral tectonics in the epicentral area of Nan'ao earthquake (M7.5), the northeastern South China Sea显示文摘1918 Nan’ao earthquake (M7.5) occurred in the northeast coastal areas of Guangdong Province. With the seismogeological survey of the epicentral area and history materials analyses, the earthquake epicenter was estimated to locate in the intersection part of the Binhai fault zone (Littoral) and Huanggangshui fault, which strikes NEE and NW, respectively. The activities of the NEE-striking thrust fault and NW-striking extensional fault that were attributed to 1918 Nan’ao earthquake occurred in the Dongshan Island of the epicentral area; they reflected the focal stress field with compression in NW-SE direction and extension in NE-SW direction. The isoseismal contour of seismic intensity X shows a shape of ‘X’ composed of two mutually overlapping ellipses with two axes striking NEE and NW, respectively, and such shape implies that the occurrence of this earthquake is controlled by a pair of conjugate seismotectonic faults constituted by the NEE-striking Binhai fault zone and the NW-striking Huanggangshui fault. The Binhai fault zone is a dominant seismogenic structure, and the NW-striking Huanggangshui fault is the subdominant one. The onshoreoffshore deep seismic profile that crossed the epicentral area and was perpendicular to the strike of the Binhai fault zone was obtained. According to the analyses of the seismic data, the Binhai fault zone is defined as a low velocity zone with SE dip-slip in thecrustal structure section. The Binhai fault zone is a boundary fault between the South China subplate and South China Sea subplate. The crust structure on the northwest side of Binhai fault zone is a normal continental crust with a thickness of 30 km, and the one on the southeast side of the fault zone is a thinning continental crust with a thickness of 25―28 km. The Binhai fault zone is an important seismogenic fault and also is an earthquake-controlling fault. The intersection part between the Binhai fault zone and the low velocity zone of upper crust is advantageous to stress concentration and strain energy accumulation, and presents the deep dynamic conditions for the earthquake’s pregnancy and occurrence. | XU Huilong QIU Xuelin ZHAO Minghui SUN Jinlong ZHU Junjiang | 2006 | Chinese Science Bulletin2006，51，B12： | 17 |
| 4 | The Cenozoic activities of Yangjiang-Yitongdong Fault: insights from analysis of the tectonic characteristics and evolution processes in western Zhujiang(Pearl) River Mouth Basin显示文摘The Yangjiang-Yitongdong Fault (YJF) is an important NW-trending regional fault, which divides the Zhujiang (Pearl) River Mouth Basin (ZRMB) into western and eastern segments. In Cenozoic, the northern continental margin of the South China Sea (SCS) underwent continental rifting, breakup, seafloor spreading and thermal subsidence processes, and the Cenozoic activities of YJF is one part of this series of complex processes. Two long NW-trending multichannel seismic profiles located on both sides of the YJF extending from the continental shelf to Continent-Ocean Boundary (COB) were used to study the tectonic and sedimentary characteristics of western ZRMB. Using the 2D-Move software and back-stripping method, we constructed the balance cross-section model and calculated the fault activity rate. Through the comprehensive consideration of tectonic position, tectonic evolution history, featured structure, and stress analysis, we deduced the activity history of the YJF in Cenozoic. The results showed that the YJF can be divided into two segments by the central uplift belt. From 65 Ma to 32 Ma, the YJF was in sinistral motion as a whole, inherited the preexisting sinistral motion of Mesozoic YJF, in which, the southern part of YJF was mainly in extension activity, controlling the formation and evolution of Yunkai Low Uplift, coupled with slight sinistral motion. From 32 Ma to 23.8 Ma, the sinistral motion in northern part of YJF continued, while the sinistral motion in southern part began to stop or shifted to a slightly dextral motion. After 23.8 Ma, the dextral motion in southern part of YJF continued, while the sinistral motion in northern part of YJF gradually stopped, or shifted to the slightly dextral motion. The shift of the YJF strike-slip direction may be related to the magmatic underplating in continent-ocean transition, southeastern ZRMB. According to the analysis of tectonic activity intensity and rift sedimentary structure, the activities of YJF in Cenozoic played a regulating role in the rift extension process of ZRMB. | Yuhan Li Rongwei Zhu Hailing Liu Xuelin Qiu Haibo Huang | 2019 | Acta Oceanologica Sinica2019，38，9： | 10 |
| 5 | Passive seismic experiment and ScS wave splitting in the southwestern subbasin of South China Sea显示文摘The seismic experiment of 3D array of OBS in the southwestern sub-basin of the South China Sea(SCS) is briefly introduced in this paper.The data analysis of broadband OBS shows that totally 93 earthquakes with magnitude of Ms 6.0-6.9 and 10 earthquakes with magnitude above Ms 7.0 were recorded in high quality during this experiment,especially the catastrophic earthquake Ms 9.0 occurred in the east sea area of Japan on March 11,2011.The anisotropy parameters inversion of ScS wave of four events above Ms 7.0 indicates that the fast direction of shear wave is N58°E parallel to the ceased spreading ridge of the southwestern sub-basin of SCS(the slow direction is S35°E perpendicular to the spreading ridge),which means the spreading ridge is under compressing stress at present and the cessation of seafloor spreading is related to such stress field as well. | RUAN AiGuo LI JiaBiao LEE ChaoShing QIU XueLin PAN ShaoJun | 2012 | Chinese Science Bulletin2012，57，25： | 9 |
| 6 | OCEAN BOTTOM SEISMOMETER AND ONSHOREOFFSHORE SEISMIC EXPERIMENT IN NORTHEASTERN SOUTH CHINA SEA显示文摘Three-component Ocean Bottom Seismometers, portable land stations and marine air gun seismic sources were used to carry out an onshore-offshore deep seismic profile in northeastern South China Sea. This profile, orientated in NNW-SSE, was as long as 500 km and perpendicular to the strike of regional tectonics. The offshore data were processed in Taiwan Ocean University using a number of available software and the onshore data were analyzed in South China Sea Institute of Oceanology by new-written programs and public software. Preliminary results show that the seismic data are in good quality and contain rich information of deep structure. Seismic phases, e.g. Pg, PmP and Pn, are identified in the offset range 5~220 kin, which will provide an important dataset for the deep crustal structure and oil-gas basin evolution studies of this region. | QIU Xuelin ZHAO Minghui YE Chunming WANG Tankai WANG Ping ZHANG Yixiang XIA Kanyuan LEE Chaoshing | 2004 | Geotectonica et Metallogenia2004，28，1： | 8 |
| 7 | Crustal S-wave velocity structure across the northeastern South China Sea continental margin: implications for lithology and mantle exhumation显示文摘The northeastern margin of the South China Sea (SCS), developed from continental rifting and breakup, is usually thought of as a non-volcanic margin. However, post-spreading volcanism is massive and lower crustal high-velocity anomalies are widespread, which complicate the nature of the margin here. To better understand crustal seismic velocities, lithology, and geophysical properties, we present an S-wave velocity (VS) model and a VP/VS model for the northeastern margin by using an existing P-wave velocity (VP) model as the starting model for 2-D kinematic S-wave forward ray tracing. The Mesozoic sedimentary sequence has lower VP/VS ratios than the Cenozoic sequence;in between is a main interface of P-S conversion. Two isolated high-velocity zones (HVZ) are found in the lower crust of the continental slope, showing S-wave velocities of 4.0–4.2 km/s and VP/VS ratios of 1.73–1.78. These values indicate a mafic composition, most likely of amphibolite facies. Also, a VP/VS versus VP plot indicates a magnesium-rich gabbro facies from post-spreading mantle melting at temperatures higher than normal. A third high-velocity zone (VP : 7.0–7.8 km/s;VP/VS: 1.85–1.96), 70-km wide and 4-km thick in the continent-ocean transition zone, is most likely to be a consequence of serpentinization of upwelled upper mantle. Seismic velocity structures and also gravity anomalies indicate that mantle upwelling/ serpentinization could be the most severe in the northeasternmost continent-ocean boundary of the SCS. Empirical relationships between seismic velocity and degree of serpentinization suggest that serpentinite content decreases with depth, from 43% in the lower crust to 37% into the mantle. | WenAi Hou Chun-Feng Li XiaoLi Wan MingHui Zhao XueLin Qiu | 2019 | Earth and Planetary Physics2019，3，4： | 8 |
| 8 | Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan,China显示文摘A set of unique sodium lamprophyres is devel)0.1(oped in the Cenozoic intraconti)]nental extensional zone of northeastern Hunan. These lamprophyres are significantly different in major [(and trace elements and Sr, Nd isotopes from ordinary potassic lamprophyr\ es. )0(The rocks)0( )(are)( )]characterized as being enriched in Na2O and high in TiO2 and weakly enriched in Nb, Ta, Nd and LREE with no negative Eu anomaly. The trace elements and Sr, Nd isotopic compositions are typical of the mantle source region of oceanic island basalts (OIB). The average initial 87Sr/86Sr ratio is 0.705332, and the average initial 143Nd/144Nd ratio is 0.512650, with εNd(t) being[( )45.4(+3.5)(--)(+3.9, )]marking a mantle source region of unique sodium lamprophyres. The lamprophyres were formed by metasomatism of the primitive mantle at the bottom of lithosphere by vola[(tile)(-)(containing )68.2(f)(l)(u-)]ids/melts from the asthenosphere. The measured Rb-Sr isochron age of sodium lamprophyre is 136.61 Ma, representing a period in which the tectonic setting changed from compressive to extensional. [(Sodium lamprophyres were formed in a mantle plume tectonic set)0(ting characterized by mantle )]upwelling from the asthenosphere within the continent. Asthenospheric mantle upwelling is the principal geodynamic factor leading to the formation of sodium lamprophyres and constraining the [(Yanshanian i)0(n)(tracontinental extensional activity in northeast)0(ern Hunan, China.)] | JIA Dacheng HU Ruizhong LU Yan XIE Guiqing QIU Xuelin | 2004 | Science China Earth Sciences2004，47，6： | 7 |
| 9 | Seismic phases from the Moho and its implication on the ultraslow spreading ridge显示文摘The Moho interface provides critical evidence for crustal thickness and the mode of oceanic crust accretion.The seismic Moho interface has not been identified yet at the magma-rich segments(46°–52°E)of the ultraslow spreading Southwestern Indian Ridge(SWIR).This paper firstly deduces the characteristics and domains of seismic phases based on a theoretical oceanic crust model.Then,topographic correction is carried out for the OBS record sections along Profile Y3Y4 using the latest OBS data acquired from the detailed 3D seismic survey at the SWIR in 2010.Seismic phases are identified and analyzed,especially for the reflected and refracted seismic phases from the Moho.A 2D crustal model is finally established using the ray tracing and travel-time simulation method.The presence of reflected seismic phases at Segment 28 shows that the crustal rocks have been separated from the mantle by cooling and the Moho interface has already formed at zero age.The 2D seismic velocity structure across the axis of Segment 28 indicates that detachment faults play a key role during the processes of asymmetric oceanic crust accretion. | ZHANG Jiazheng ZHAO Minghui QIU Xuelin LI Jiabiao RUAN Aiguo | 2013 | Acta Oceanologica Sinica2013，32，12： | 5 |
| 10 | Identification and analysis of shear waves recorded by three-component OBSs in northeastern South China Sea显示文摘Structure models associated with P-and S-wave velocities contain considerable amount of information on lithology and geophysical properties,which can be used to better understand the complexity of the deep crustal structure. However,records of converted shear waves are less due to the speciality of seismic survey at sea and the rigorous generated conditions. The study on shear waves has always been a weakness for studying the deep crustal structures of South China Sea (SCS). In this paper,eleven three-component OBSs were deployed along the Profile OBS-2001 in northeastern SCS. After the data processing of polarization and band-pass filter,converted S-wave phases were identified in the radical component records of nine OBSs. Taking the OBS7 as an example,identification and analysis of converted shear waves were presented and discussed in detail. A few phase groups,such as PwSc,PgSs,PnSc,PmS,and PwSn,were found coming from the deep crust or Moho interface by simple theoretical model calculation and ray-tracing simulation. The results not only provide the underlying basis for studies of S-wave velocity structure and Poisson's ratio structure,but also reveal the relationship between crustal petrology and seismology,which will be of importance for making full use of S-wave information in the future. | Minghui Zhao Xuelin Qiu Shaohong Xia Ping Wang Kanyuan Xia Huilong Xu | 2008 | Progress in Natural Science:Materials International2008，18，2： | 4 |
| 11 | Distribution and identification of the low-velocity layer in the northern South China Sea显示文摘低速度的层(LVL ) ,与构造活动和动态背景密切相关,总是是在深外壳的结构研究的一个热话题。深地震(OBS/OBH ) 并且自从 1990 年代,向陆近海的实验广泛地在北华南海(SCS ) 被实现了。六地震侧面被国内、国际的合作在 SCS 的北边缘上完成。外壳的结构的特征被揭示,五速度倒置层被发现。在他们之中,有 3.0-3.5 km · s -1 速度的三 LVL 位于 Yinggehai 盆和珀尔河嘴盆的沉积结构(深入地的 2.0-6.0km 和在厚度的 2.0-4.6 km ) 。他们被反射、折射的阶段为他们的浅深度识别。有 5.5-6.0 km · s -1 速度的另外的二 LVL 通常在东北、西北的 SCS 的过渡外壳的结构与大约 2.5-6.0 km 厚度在中间的外壳(深入地的 7.0-18.0 km ) 中存在。他们被折射阶段检测从他们的覆盖并且内在的层。我们探索了与以前报导的结果结合的可能的构造形成机制,它为 SCS 的形成和进化提供了证据。 | Zhao Minghui Qiu Xuelin Xu Huilong Shi Xiaobin Wu Shimin Ye Chunming Xia Shaohong | 2007 | Progress in Natural Science:Materials International2007，17，5： | 3 |
| 12 | Thermal and rheological structures of the Xisha Trough, South China Sea显示文摘 | Xiaobin Shi Di Zhou Xuelin Qiu | 2002 | Tectonophysics2002，351，： | 1 |
| 13 | Seismic structure in the northeastern South China Sea:S-wave velocity and Vp/Vs rations derived from three-component OBS data显示文摘 | ZHAO MINGHUI QIU XUELIN XIA SHAOHONG | 2010 | Tectonophysics2010，480，： | 1 |
| 14 | Characteristics of surface heat flow in the South China Sea显示文摘 | Shi Xiaohin Qiu Xuelin Xia Kanyuan | 2003 | Journal of Asian Earth Sciences2003，22，26： | 1 |
| 15 | Seismic structure in the northeastern South China Sea:S-wave velocity and Vp/Vs ratios derived from three- component OBS data显示文摘 | ZHAO MINGHUI QIU XUELIN XIA SHAOHONG | 2010 | Tectonophysics2010，480，： | 1 |
| 16 | Crustal structure across the Xisha Trough, northwestern South China Sea 显示文摘 | Qiu Xuelin Ye Sanyu Wu Shimin | 2001 | Tectonophysics2001，341，： | 1 |
| 17 | Teleseismic P-waveform receiver function analysis and its application to Qiongzhong station(QIZ) of Hainan Island,NW South China Sea显示文摘 | QIU XUELIN PRIESTLEY K MCKENZIE D | 2002 | Journal of Geosciences of China2002，4，1： | 1 |
| 18 | Crustal structure across the Xisha Trough,northwestern South China Sea显示文摘 | QIU XUELIN YE SANYU WU SHIMIN | 2001 | Tectonophysics2001，341，1： | 1 |
| 19 | Characteris- tics of surface heat flow in the South China Sea显示文摘 | SHI Xiaobin QIU Xuelin XIA Kanyuan | 2003 | Journal of Asian Earth Sciences2003，22，： | 1 |
| 20 | Characteristics of surface heat flow in the South China Sea显示文摘 | Shi Xiaobin Qiu Xuelin Xia Kanyuan | 2003 | Journal of Asian Earth Sciences2003，22，3： | 1 |
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