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Science China Earth Sciences 2024年第3期67卷 894-894页

作者： Weiwei DING Rixiang ZHU Bo WAN Liang zhao Xiongwei NIU Pan zhao Baolu SUN yanghui zhao Key Laboratory of Submarine Geoscience&Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China State Key Laboratory of Lithosphere Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

The research paper"Geodynamic processes of the southeastern Neo-Tethys Ocean and the formation mechanism of the curved subduction system in Southeast Asia"(Sci China Earth Sci,2023,66:703-717)contained *** corrections... 详细信息

关键词： southeastern subduction Tethys

半干旱区雨养农田绿肥作物轮作休耕技术措施研究

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干旱区资源与环境 2024年第1期38卷 123-132页

作者：赵仰徽齐向辉任稳江车宗贤任亮甘肃省会宁县农业技术推广中心会宁730799 甘肃省农业科学院土壤肥料与节水农业研究所兰州730020

为探索休耕地科学合理的管护方式,以半干旱生态退化区耕地为研究对象,设置毛苕子→春油菜→箭筈豌豆(R1)、春油菜→箭筈豌豆→毛苕子(R2)、箭筈豌豆→毛苕子→春油菜(R3)3个不同绿肥作物轮作序列,及撂荒(CK1)、裸闲(CK2)共5个处理,开展... 详细信息

为探索休耕地科学合理的管护方式,以半干旱生态退化区耕地为研究对象,设置毛苕子→春油菜→箭筈豌豆(R1)、春油菜→箭筈豌豆→毛苕子(R2)、箭筈豌豆→毛苕子→春油菜(R3)3个不同绿肥作物轮作序列,及撂荒(CK1)、裸闲(CK2)共5个处理,开展3年定位试验,通过系统监测不同处理条件下农田土壤水分、养分等指标参数,明确不同处理对休耕地农田土壤质量的影响。结果表明,绿肥轮作处理可年生产绿肥干物质2257.5-3478.3kg·hm-2,其年均农田土壤水分耗散量分别较对照增加了17.69-71.36mm,但绿肥干物质还田使0-20cm土层有机质较撂荒和裸闲处理显著提高了8.87%-32.8%。R3处理一个轮作周期的绿肥总干物质还田量较R1、R2处理增加了54%、19.9%,水分总耗散量较R1、R2、CK1、CK2处理增加了62.98mm、29.14mm、140.34mm、202.78mm,水分生产效率较R1、R2处理提高了39.3%和21.4%;3年轮作结束后,0-40cm土壤容重不同处理间差异不显著,介于1.151-1.219g·cm-3之间;R3处理0-20cm土层有机质分别较R1、R2、CK1、CK2处理提高了27.5%、2.6%、44.5%、18.4%。综合来看,传统撂荒和裸闲方式耕地质量恢复较慢,合理的绿肥轮作还田可有效加快耕地质量恢复,以箭筈豌豆→毛苕子→油菜轮作还田方式效果最佳,可在半干旱生态退化区推广应用。

关键词：休耕耕作措施绿肥轮作土壤水分理化性状

Cenozoic Propagated Rifting in the Dangerous Grounds in Response to the Episodic Seafloor Spreading of the South China Sea

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Journal of Earth Science 2022年第4期33卷 1031-1046页

作者： Yuanyuan Wang yanghui zhao Weiwei Ding Penggao Fang Jiabiao Li Collaborative Innovation Center of South China Sea Studies Nanjing UniversityNanjing 210093China Key Laboratory of Submarine Geosciences Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Hubei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China

The southern continental margin of the South China Sea has documented multiphase continental rifting corresponding to the propagation of seafloor *** we investigate three multi-channel seismic reflection profiles across different segments of the Dangerous Grounds with a NE-SW *** correlation reveals that the Cenozoic tectono-stratigraphic framework in the Dangerous Grounds is featured with diachronous rifting,which records the successive spreading of East Subbasin and Southwest Subbasin,South China *** reconstructing the tectono-sedimentary evolution history in different segments,we combine the quantification of the brittle extension,tectonic subsidence,as well as the crustal *** provide evidence that the extensional stress migrated from northeast to southwest with the progressive propagation of the seafloor spreading in the oceanic ***,the impact of the tectonic propagation persists even after the cessation of seafloor spreading,evidenced by a longer stretching duration in the West-Dangerous Grounds than that in the eastern ***,a temporary syn-rift subsidence delay synchronously to the spreading of the adjacent oceanic basin is observed along the southern *** observation proves the secondary mantle convection during the seafloor spreading in the southern continental margin,which is related to the propagating rift.

关键词： Dangerous Grounds South China Sea propagated rifting tectonic tectonic subsidence

Geodynamic processes of the southeastern Neo-Tethys Ocean and the formation mechanism of the curved subduction system in Southeast Asia

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Science China Earth Sciences 2023年第4期66卷 703-717页

作者： Weiwei DING Rixiang ZHU Bo WAN Liang zhao Xiongwei NIU Pan zhao Baolu SUN yanghui zhao Key Laboratory of Submarine Geoscience&Second Institute of Oceanography Ministry of Natural ResrouceHangzhou 310012China State Key Laboratory of Lithosphere Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

Southeast Asia is located at the intersection of the Tethys and Pacific domains. The superimposed effects of the two tectonic domains have resulted in complicated deep structure, surface magma responses, and dynamic processes of Southeast Asia. Based on the latest long-term passive seismic experiment and numerical modeling, this study reconstructs the dynamic processes of the closure of the Neo-Tethys Ocean and the formation of the curved subduction system in Southeast Asia since the Late Mesozoic. P-wave velocity structure shows a remnant of the Neo-Tethys subducted slab in the lower mantle beneath Southeast Asia at a depth of approximately 1500 km. On the Java-East Timor subduction zone, the remnant slab is coupled with the Indo-Australian subducting slab in the upper mantle with the same direction, while on the Sumatra subduction zone, the remnant slab is decoupled from the Indo-Australian subducting slab in different directions. The formation of the curved subduction system in Southeast Asia is resulted from the northward subdcutions of previous Neo-Tethys and current IndoAustralian Plate, and the westward subduction of the Pacific Plate since Mesozoic. The former is characterized by continuous subduction and subsequent continental block collision, forming the current continental lithosphere in Southeast Asia and the curve-shaped Sumatra-Java subduction zone;the latter is characterized by subduction retreat and back-arc spreading, forming the eastern Philippine subduction zone and a series of marginal sea basins. Since the Early Cretaceous, the opening of the North Australian Sea resulted in stagnation of the Australian Block in the high latitude area of the southern hemisphere for a long *** North Australian Sea was dominated by out-dipping double subduction from 45 Ma, which resulted in rapid northward drifting of the Australian Block and final collision with the Sundaland.

关键词： Southeastern Neo-Tethys Ocean Curved subduction system in Southeast Asia North Australian Sea Deep structure Numerical modeling

Seismic Reflection Characteristics and Evolution of Intrusions in the Qiongdongnan Basin: Implications for the Rifting of the South China Sea

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Journal of Earth Science 2016年第4期27卷 642-653页

作者： yanghui zhao Dianjun Tong Ying Song Linlong Yang Chao Huang Faculty of Earth Resources China University of Geosciences Department of Geology China University of Petroleum (East China)

The Qiongdongnan Basin（QDNB） is situated in the extensional zone at the vertex of the V-shaped northwest sub-basin, non-volcanic northern margin of the South China Sea（SCS）. From north to south, the thickness of the continental lithosphere decreases from 22 km on the northern continental shelf to 17 km at the deepest area of the central depression. A sharp change on the crustal structure is of importance to hydrocarbon exploration yet the dynamic causes remain unknown. A comprehensive study including （1） interpretation of seismic profiles,（2） P-wave velocity data modeling, and （3） magnetic anomalies analysis reveals that there are some high-density intrusions along the lithospheric thinning belt. Chaotic reflections can be found in the southwest of the QDNB, with a low velocity（〈3.4 km/s）, while in the center and the east, the intensively deformed strata passing towards the diapir flanks and their high velocities（〉6 km/s） suggest the existence of igneous diapirs. Diapirism differentiation are primarily achieved through analysis of the contact relationship and the thickness variations in the surrounding strata. The first phase of diapirism along the Songnan low uplift occurred in the Late Mesozoic, and the second phase of diapirism in a form of subsequent gas movement remained active until the Late Quaternary. The distribution and the evolution of the diapirs would have major implications for post-rift emplacement.

关键词： Qiongdongnan Basin intrusion seismic reflection anomaly diapirism rifting of theSouth China Sea.

Sequence Stratigraphic Framework and its Formation Mechanism for the Break-up Sequence in the Baiyun Sag， Northern South China Sea

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Journal of Earth Science 2022年

作者： Chao Huang Jianye Ren Yan Wang yanghui zhao Hubei Key Laboratory of Marine Geological Resources， China University of Geosciences College of Marine Science and Technology， China University of Geoscience Wuhan Hebei Center of Marine Geological Resources Survey Key Laboratory of Submarine Geosciences， Second Institute of Oceanography， Ministry of Natural Resources

Modern research shows that the marginal deep-water area cracking above an unconformity interface and a main regional development often between a transgressive interface before product characteristics of a reflection configuration display a regressive formation， the stratigraphic entity called a lithospheric breakup sequence (BS). Detailed seismic profile interpretation and logging analysis show that there is also a large-scale progradation reflector composed of a progressive continental-shelf margin delta between the Baiyun Sag fracture unconformity interface and regional transgression surface in the deep-water area of the northern continental margin of the South China Sea. In this paper， the concepts of the Lithospheric Breakup Surface and breakup sequence are introduced to explore the isostatic adjustment process during the first period of lithospheric rupture in the continental margin of the South China Sea through the study of this special stratigraphic entity developed in the deep-water continental margin. The results show that the marginal rebound caused by fractures at 32 Ma and 23.8 Ma may have been the main controlling factor. The research in this paper is helpful in deepening the understanding of the lithospheric extensional fracture process in the northern South China Sea and has practical application value for the prediction of large deep-water reservoirs.

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基于知识图谱法的我国紫薇属植物研究进展分析

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中国野生植物资源 2024年第2期43卷 52-58页

作者：郝思文张冬林文亚峰张文茜赵扬辉中南林业科技大学风景园林学院湖南长沙410004 美国佐治亚大学园艺系佐治亚雅典30602

目的:为了系统性梳理紫薇属研究进展,确定紫薇属未来研究趋势及方向。方法:基于中国知网数据库,利用CiteSpace工具,通过绘制知识图谱的方法,对近30年(1992~2021)紫薇属研究热点及发展趋势进行系统分析。结果:我国对于紫薇属植物研究起始... 详细信息

目的:为了系统性梳理紫薇属研究进展,确定紫薇属未来研究趋势及方向。方法:基于中国知网数据库,利用CiteSpace工具,通过绘制知识图谱的方法,对近30年(1992~2021)紫薇属研究热点及发展趋势进行系统分析。结果:我国对于紫薇属植物研究起始于1990年代,可以划分为起步期(1992~2001年)、增长期(2002~2011年)、稳定期(2012~2021年)3个时间段。研究作者呈现“一主两副多组团”的合作网络布局,研究机构所处地区与紫薇属主要栽植区存在一定相关性。结论:未来关于紫薇属研究的热点将集中在小矮紧凑型紫薇选育、分子育种、新品种的产学研一体化研究、基因定位、规划设计导则等方面。

关键词：紫薇属研究热点研究进展知识图谱

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Characterising the nature, evolution and origin of detachment fault in central depression belt, Qiongdongnan Basin of South China Sea: evidence from seismic reflection data

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Acta Oceanologica Sinica 2014年第12期33卷 118-126页

作者： REN Jianye ZHANG Daojun TONG Dianjun HUANG Anmin WANG Yahui LEI Chao ZUO Qianmei zhao yanghui HE Weijun YANG Linlong Key Laboratory of Tectonics and Petroleum Resources of the Education Ministry China University of Geosciences Wuhan Faculty of Earth Resources China University of Geosciences Wuhan Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Limited

Using regional geological, newly acquired 2D and 3D seismic, drilling and well log data, especially 2D long cable seismic profiles, the structure and stratigraphy in the deep-water area of Qiongdongnan Basin are interpreted. The geometry of No.2 fault system is also re-defined, which is an important fault in the central depression belt of the deep-water area in the Qiongdongnan Basin by employing the quantitative analysis techniques of fault activity and backstripping. Furthermore, the dynamical evolution of the No.2 fault sys-tem and its controls on the central depression belt are analyzed. This study indicates that the Qiongdongnan Basin was strongly influenced by the NW-trending tensile stress field during the Late Eocene. At this time, No.2 fault system initiated and was characterized by several discontinuous fault segments, which controlled a series small NE-trending fault basins. During the Oligocene, the regional extensional stress field changed from NW-SE to SN with the oceanic spreading of South China Sea, the early small faults started to grow along their strikes, eventually connected and merged as the listric shape of the No.2 fault system as ob-served today. No.2 fault detaches along the crustal Moho surface in the deep domain of the seismic profiles as a large-scale detachment fault. A large-scale rollover anticline formed in hanging wall of the detachment fault. There are a series of small fault basins in both limbs of the rollover anticline, showing that the early small basins were involved into fold deformation of the rollover anticline. Structurally, from west to east, the central depression belt is characterized by alternatively arranged graben and half-graben. The central depression belt of the Qiongdongnan Basin lies at the extension zone of the tip of the V-shaped northwest-ern ocean sub-basin of the South China Sea, its activity period is the same as the development period of the northwestern ocean sub-basin, furthermore the emplacement and eru

关键词： Qiongdongnan Basin No.2 fault detachment fault central depression belt

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乒乓球战术五项指标统计法的建构与应用研究

河南财政金融学院学报（自然科学版） 2024年第2期33卷 69-77页

作者：徐君伟栾超群段秋月赵洋慧张文芳匡泉辉河南财经政法大学体育学院河南郑州450046 武汉体育学院网球学院湖北武汉430079

为更好地提升乒乓球技战术定量分析效果,构建了乒乓球战术五项指标统计法,并与传统三段法的特点和具体运用进行了对比分析。结果表明:五项指标法破解了战术归“段”时固定得失分板数的规约,最大限度确保战术归“段”准确;厘清了由“抢... 详细信息

为更好地提升乒乓球技战术定量分析效果,构建了乒乓球战术五项指标统计法,并与传统三段法的特点和具体运用进行了对比分析。结果表明:五项指标法破解了战术归“段”时固定得失分板数的规约,最大限度确保战术归“段”准确;厘清了由“抢”入“持”的衔接过程,更明确、深入地揭示由“抢”入“持”的衔接特点;战术指标的内涵更精准、贴切,更充分、准确地揭示运动员的技战术运用特点和世界乒乓球技战术发展的最新特点。

关键词：乒乓球战术上手反上手快速衔接

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Mantle flow underneath the South China Sea revealed by seismic anisotropy

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National Science Review 2023年第10期10卷 54-61页

作者： Fansheng Kong Rui Gao Stephen S.Gao Kelly H.Liu Weiwei Ding Xiongwei Niu Aiguo Ruan Pingchuan Tan Jianke Fan Shaoping Lu Zhengyi Tong Liqun Cheng Wenfei Gong yanghui zhao Jiabiao Li Key Laboratory of Submarine Geosciences Second Institute of OceanographyMinistry of Natural Resources Southern Marine Science and Engineering Guangdong Laboratory Geology and Geophysics Program Department of Geosciences and Geological and Petroleum Engineering Missouri University of Science and Technology School of Earth Sciences and Engineering Sun Yat-sen University Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences

It has long been established that plastic flow in the asthenosphere interacts constantly with the overlying lithosphere and plays a pivotal role in controlling the occurrence of geohazards such as earthquakes and volcanic ***,accurately characterizing the direction and lateral extents of the mantle flow field is notoriously difficult,especially in oceanic areas where deployment of ocean bottom seismometers(OBSs) is expensive and thus *** this study,by applying shear wave splitting analyses to a dataset recorded by an OBS array that we deployed between mid-2019 and mid-2020 in the South China Sea(SCS),we show that the dominant mantle flow field has a NNW-SSE orientation,which can be attributed to mantle flow extruded from the Tibetan Plateau by the ongoing Indian-Eurasian *** addition,the results suggest that E-W oriented flow fields observed in South China and the Indochina Peninsula do not extend to the central SCS.

关键词： mantle flow South China Sea Tibetan Plateau seismic anisotropy shear wave splitting