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Geochronology and Petrogenesis of Late Carboniferous to Early Permian Basalts in the Central Lhasa Subterrane, Southern Tibet: Implications for the Evolution of the Sumdo Paleo-Tethys Ocean

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 955-968页

作者： MA Wang LIU Yingchao YANG Zhusen Jan-Marten HUIZENGA LI Zhenqing yue longlong ZHAO Sibo School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Institute of Geology Sinoprobe LaboratoryChinese Academy of Geological SciencesBeijing 100037China MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesNO-1432ÅsNorway Economic Geology Research Centre(EGRU) College of Science and EngineeringJames Cook UniversityTownsvilleQueensland 4811Australia Department of Geology University of JohannesburgAuckland Park 2006South Africa

Basalts from the Late Carboniferous to Early Permian are extensively developed in the central Lhasa subterrane, southern Tibet. Studying the petrogenesis of these rocks may have implications for the late Paleozoic arc magmatism along the central Lhasa subterrane uncovering more of the evolution of the Sumdo Paleo-Tethys Ocean and its dynamic mechanism. Basalt samples from the Luobadui Formation in the Leqingla area, NW of Linzhou City in the central Lhasa subterrane, southern Tibet exhibit arc-like geochemical signatures in a subduction-zone tectonic setting characterized by high Al_(2)O_(3) and low TiO_(2) contents, fractionated REE patterns with low Nb/La ratios and high LREE concentrations, and negative HFSE anomalies. Based on their higher Th/Ce, Nb/Zr, and lower Ba/Th, Pb/Nd ratios, slightly negative to positive ε_(Nd)(t) values, and the relatively high Sr-Pb isotopic compositions, these samples were probably derived from partial melting of a depleted mantle source of garnet + spinel lherzolite, metasomatized by subducted sediments around 297 Ma. Modeling of the trace elements indicates that these basalts experienced fractional crystallization of olivine, clinopyroxene and minor plagioclase during magma ascent and eruption. It is proposed that these Late Carboniferous–Early Permian basalts are associated with the northward subduction of the Sumdo Paleo-Tethys Ocean seafloor along the southern margin of the central Lhasa subterrane.

关键词： geochemistry northward subduction Sumdo Paleo-Tethys Ocean Lhasa terrane Tibet

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Geological Characteristics and Genesis of the Jiamoshan MVT Pb–Zn Deposit in the Sanjiang belt, Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2020年第4期94卷 1238-1255页

作者： LIU Yingchao YANG Zhusen yue longlong YU Yushuai MA Wang TANG Bolang Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China Wuhan Center China Geological SurveyWuhan 430205China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China

The carbonate-hosted Pb–Zn deposits in the Sanjiang metallogenic belt on the Tibetan Plateau are typical of MVT Pb–Zn deposits that form in thrust-fold belts. The Jiamoshan Pb–Zn deposit is located in the Changdu area in the middle part of the Sanjiang belt, and it represents a new style of MVT deposit that was controlled by karst structures in a thrust–fold system. Such a karst-controlled MVT Pb–Zn deposit in thrust settings has not previously been described in detail, and we therefore mapped the geology of the deposit and undertook a detailed study of its genesis. The karst structures that host the Jiamoshan deposit were formed in Triassic limestones along secondary reverse faults, and the orebodies have irregular tubular shapes. The main sulfide minerals are galena, sphalerite, and pyrite that occur in massive and lamellar form. The ore-forming fluids belonged to a Mg2+–Na+–K+–SO2-4–Cl-–F-–NO-3–H2 O system at low temperatures(120–130°C) but with high salinities(19–22% NaCl eq.). We have recognized basinal brine as the source of the ore-forming fluids on the basis of their H–O isotopic compositions(-145‰ to-93‰ for δDV-SMOW and-2.22‰ to 13.00‰ for δ18 Ofluid), the ratios of Cl/Br(14–1196) and Na/Br(16–586) in the hydrothermal fluids, and the C–O isotopic compositions of calcite(-5.0‰ to 3.7‰ for δ13 CV-PDB and 15.1‰ to 22.3‰ for δ18 OV-SMOW). These fluids may have been derived from evaporated seawater trapped in marine strata at depth or from Paleogene–Neogene basins on the surface. The δ34 S values are low in the galena(-3.2‰ to 0.6‰) but high in the barite(27.1‰), indicating that the reduced sulfur came from gypsum in the regional Cenozoic basins and from sulfates in trapped paleo-seawater by bacterial sulfate reduction. The Pb isotopic compositions of the galena samples(18.3270–18.3482 for 206 Pb/204 Pb, 15.6345–15.6390 for 207 Pb/204 Pb, and 38.5503–38.5582 for 208 Pb/204 Pb) are similar to those of the regional Triassic volcanic-arc rocks that formed during t

关键词： ore genesis thrust-fold belt karst-controlled style Jiamoshan Pb-Zn deposit MVT(Mississippi Valley Type)Pb-Zn deposit Sanjiang metallogenic belt Tibetan Plateau

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Palynological constraints on the age of the Mississippi Valley-type Changdong Pb-Zn deposit,Sanjiang belt,West China

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Science China Earth Sciences 2022年第1期65卷 167-181页

作者： Yingchao LIU Yucai SONG Zengqian HOU Dangpeng XI Suping LI longlong yue Wang MA Bolang TANG Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China School of Earth Science and Resources China University of Geosciences(Beijing)Beijing 100083China Jiangsu Nanjing Institute of Geo-Engineering Investigation Nanjing 210041China

Mississippi Valley-type(MVT)Pb-Zn deposits serve as the world’s major supply of Pb-Zn ***,the age constraint of MVT Pb-Zn deposits has long been a big challenge,due to the lack of minerals that are unequivocally related to ore deposition and that can be used for radioisotopic *** we show sporopollens can provide useful chronological information on the Changdong MVT Pb-Zn deposit in the Simao basin,Sanjiang belt,West *** Pb-Zn ores in the Changdong deposit are hosted by internal sediments in paleo-karst caves of meteoric *** and galena occur as replacements of carbonate minerals and void infillings in the internal *** relations suggest that the Pb-Zn mineralization occurred after the deposition of the internal sediments.A palynological assemblage mainly composed of angiosperm pollen dominated by Castanea,Quercus,and Carya and fern spores dominated by Polypodiaceae,Pteris,and Athyriaceae was *** pollen and spores place the ore-hosting internal sediments and the Changdong paleo-karst at early to middle ***,the Changdong Pb-Zn deposit must have formed after the early Oligocene(~34 Ma).These age constraints,together with the geological characteristics,indicate that the Changdong Pb-Zn deposit is a paleo-karst-controlled MVT deposit related to fold-thrust systems in the Sanjiang *** Changdong deposit is similar to other MVT Pb-Zn deposits in the northern part of the Sanjiang belt,making it possible to extend this Pb-Zn belt 500 km further to the *** presented here highlights the potential of sporopollens in dating the age of MVT deposits related to paleo-karst formation in young orogenic belts.

关键词： Mississippi Valley-type(MVT)Pb-Zn deposits Age constraint Palynomorphs Internal sediments Paleo-karst Changdong deposit Sanjiang fold-thrust belt

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Anoctamin 4 defines glucose-inhibited neurons in the ventromedial hypothalamus

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Neural Regeneration Research 2024年第6期19卷 1177-1178页

作者： longlong Tu Yanlin He Yong Xu Children’s Nutrition Research Center Department of PediatricsBaylor College of MedicineOne Baylor PlazaHoustonTXUSA Brain Glycemic and Metabolism Control Department Pennington Biomedical Research CenterLouisiana State UniversityBaton RougeLAUSA Department of Molecular and Cellular Biology Section of EndocrinologyDiabetes and MetabolismDepartment of MedicineBaylor College of MedicineHoustonTXUSA

Glucose is the primary fuel source of the brain,and therefore glucose levels need to be tightly regulated and maintained within a small physiological ***,the body necessitates a stable supply of energy mainly provided by glucose for various bodily *** or low blood glucose levels would impair the physiological functions of various organs of the body.

关键词： inhibited medial organs

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Macro-microscopic dynamic characteristics of the ballast bed induced by the variation of moisture content

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Particuology 2024年第7期90卷 118-127页

作者： Shuchen Wang longlong Fu Yongjia Qiu Haonan Xi Shunhua Zhou Key Laboratory of Road and Traffic Engineering of the Ministry of Education Tongji UniversityShanghai 201804China Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety Tongji UniversityShanghai 201804China

Due to the excellent drainage performance of the ballast,existing studies mainly focus on the dynamic response of ballast under field capacity or *** has rarely been paid to dynamic changes in moisture content and potential *** this article,we firstly conduct a model test to determine the variation of ballast moisture content under artificial *** that,a full-scale model test with cyclic loading is carried out to study the effect of moisture content variation on the macro-microscopic response of the ballast bed,where several wireless particle sensors are installed to obtain ballast motion characteristics at strategic *** results show that the moisture content increases gradually and stabilizes at a flat peak under rainfall,despite the excellent drainage performance of ballast *** halting rainfall,the moisture content drops back to field capacity,which indicates dynamic flowing surface water on ballast particles under *** flowing surface water brings changes to the original dynamic equilibrium of ballast bed:macroscopically,the deformation rate of stabilized ballast bed increases significantly,reaching a local peak under field capacity;microscopically,the x-and z-angular accelerations of the ballast show positive correlation with rainfall *** multiscale responses indicate that field capacity is a critical moisture content.

关键词： Railway ballast Flowing surface water Wireless particle sensor Multidimensional motion Full-scale model test

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Effective Ultra-High-Speed Identification Scheme of Lightning Strikes Suitable for VSC-Based DC Grids

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 548-561页

作者： longlong Chen Xiangyu Pei Xiaoguang Wei Pengzhi Li Guangfu Tang North China Electric Power University(NCEPU) Beijing 102206China Changsha University of Science and Technology Changsha 410114China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co.Ltd.Beijing 102209China

To ensure their sound and continuous operation to the greatest extent,VSC-based DC girds have extremely stringent requirements for transmission line relay *** terms of guaranteeing their reliability,accurate identification of lightning strikes on DC transmission lines is one of the urgent key problems to be *** effective ultra-high-speed identification scheme of lightning strikes suitable for the VSC-based DC grid is proposed in this ***,an 1-mode reverse voltage traveling wave(RVTW)is constructed applying the pole-mode transformation ***,fault traveling wave propagation characteristics along the DC transmission line are analyzed in depth utilizing Peterson's ***,differences of time-frequency electromagnetic transient characteristics of 1-mode RVTWs between disturbances and faults caused by lightning strikes are distinguished in detail by means of the classical wavelet transformation multi-resolution analysis ***,extensive simulations are carried out to evaluate the performance of the proposed identification scheme,and by which its excellent rapidity,reliability and robustness are *** Terms-Lightning-strike identification,Multi-resolution analysis,Relay protection,Traveling-wave protection,VsC-based DC grid,Wavelet transformation.

关键词： Lightning-strike identification Multi-resolution analysis Relay protection Traveling-wave protection VsC-based DC grid Wavelet transformation

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Topology optimization of modular structures with multiple assemblies and applications to airborne shelves

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Chinese Journal of Aeronautics 2024年第4期37卷 321-332页

作者： Jie WANG Tong GAO Ming LI Jihong ZHU longlong SONG Weihong ZHANG State IJR Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical UniversityXi’an 710072China Beijing Specialized Machinery Institute Beijing 100143China

This work is devoted to the aeronautical application of topology optimization for modular structures with multiple assemblies that consist of repeated standard modules and optional *** kinds of structures are widely used owing to their transportability,reconfigurability,low manufacturing and service *** this work,the design of airborne shelves with modular structures characterized by the standard module configuration is formulated for the first time as a topology optimization problem of multiple assemblies and multiple load cases subjected to the volume *** is shown that the weighted compliance design of multiple assemblies is a compromising solution compared to the optimization result of each individual assembly of standard ***,the performance of optimized airborne shelves with the modular structures can effectively be ameliorated with the help of reinforcements.

关键词： Topology optimization Modular structures Multiple assemblies Standard modules Airborne shelves

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Facile fabrication of CdIn_(2)S_(4)/TiO_(2)heterojunction for enhanced solar light efficient CO_(2)reduction

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 101-112页

作者： Xiaoyu Ma longlong Wang Houde She Yu Zhou Lei Wang Jingwei Huang Qizhao Wang College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China School of Environment Science and Engineering Chang’an UniversityXi’an 710064China

Photocatalytic CO_(2)reduction is a promising solution to simultaneously provide renewable chemical fuels and address the greenhouse ***,designing practical photocatalysts with advanced architectures remains ***,we report the preparation of a novel CdIn_(2)S_(4)/TiO_(2)binary heterojunction via an in situ solvothermal approach,which exhibits superior photocatalytic activity for sunlight-driven CO_(2)*** CdIn_(2)S_(4)/TiO_(2)composites exhibit significantly enhanced photocatalytic performance for CO_(2)reduction compared to unmodified TiO_(2).Among them,the 3%CdIn_(2)S_(4)/TiO_(2)composite has optimal CO and CH_(4) evolution rates of 18.32 and 1.03μmol·g–1·h–1,*** yield of CO is 4.7 times higher than that of pristine TiO_(2).This improved photocatalytic activity of the CdIn_(2)S_(4)/TiO_(2)heterostructure can be attributed to its large surface area,extended light absorption range and high separation efficiency of photogenerated electron-hole pairs,which are supported by the results of photoluminescence spectroscopy and the photoelectrochemical ***,the photocatalytic mechanism based on the binary CdIn_(2)S_(4)/TiO_(2)heterojunction is proposed and separation process of photogenerated electron-hole pairs is *** brief,we aim to provide insights into the application of TiO_(2)in energy conversion processes through the construction of heterogeneous junctions.

关键词： TiiO_(2) CdIn_(2)S_(4) heterojunction photocatalytic CiO_(2)reduction

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Application of different fiber structures and arrangements by electrospinning in triboelectric nanogenerators

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Chinese Journal of Chemical Engineering 2024年第5期69卷 177-191页

作者： Hebin Li Zifei Meng Dehua Wang Ye Lu longlong Jiang Le Zhang Hanbin Wang Xiaoxiong Wang College of Physics Qingdao UniversityQingdao 266071China School of Physics and Electronic Engineering Jiangsu Normal UniversityXuzhouJiangsu 221000China Microsystem&Terahertz Research Center China Academy of Engineering Physics(CAEP)Chengdu 610200China Institute of Electronic Engineering China Academy of Engineering Physics(CAEP)Mianyang 621900China University-Industry Joint Center for Ocean Observation and Broadband Communication College of PhysicsQingdao UniversityQingdao 266071China Weihai Innovation Research Institute of Qingdao University Weihai 264200China Collaborative Innovation Center for Eco-Textiles of Shandong Province and State Key Laboratory of Bio-Fibers and Eco-TextilesQingdao UniversityQingdao 266071China

In recent years,nanogenerators(NGs)have attracted wide attention in the energy field,among which triboelectric nanogenerators(TENGs)have shown superior *** reports of electrospinning(ES)-based TENGs have been reported,but there is a lack of deep analysis of the designing method from microstructure,limiting the creative of new ES-based *** TENGs use polymer materials to achieve corresponding design,which requires structural design of polymer *** existing polymer molding design methods include macroscopic molding methods,such as injection,compression,extrusion,calendering,etc.,combined with liquid-solid changes such as soluting and melting;it also includes micro-nano molding technology,such as melt-blown method,coagulation bath method,ES method,and nanoimprint *** fact,ES technology has good controllability of thickness dimension and rich means of nanoscale structure *** present,these characteristics have not been ***,in this paper,we combine recent reports with some microstructure regulation functions of ES to establish a more general TENGs design *** on the rich microstructure research results in the field of ES,much more new types of TENGs can be designed in the future.

关键词： Triboelectric nanogenerators Electrospinning Fiber microstructure regulation Nanomaterials Membranes Global optimization

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Isolation of a feline-derived feline panleukopenia virus with an A300P substitution in the VP2 protein and confrmation of its pathogenicity in dogs

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Animal Diseases 2024年第3期4卷 173-185页

作者： Jiakang Li Jiajia Peng yue Zeng Ying Wang Luying Li Yiran Cao longlong Cao QingXiu Chen Zijun Ye Dengyuan Zhou Shengbo Cao Qiuyan Li National Key Laboratory of Agricultural Microbiology Huazhong Agricultural UniversityWuhan 430070HubeiChina. Laboratory of Animal Virology College of Veterinary MedicineHuazhong Agricultural UniversityWuhanHubeiP.R.China. Wuhan Keqian Biology Co. LtdWuhanHubeiP.R.China. Department of Life Science Imperial College LondonLondonUK.

Feline panleukopenia virus(FPV)is a single-stranded DNA virus that can infect cats and cause feline panleukopenia,which is a highly contagious and fatal disease in *** sequence of FPV is highly variable,and mutations in the amino acids of its capsid protein play crucial roles in altering viral virulence,immunogenicity,host selection,and other *** this study,the epidemiology of FPV was studied using 746 gastrointestinal swab samples derived from cats that presented gastrointestinal symptoms specifcally,diarrhea or vomiting during the period spanning from 2018 to *** overall prevalence of FPV-positive patients among these samples was determined to be 45.4%.Capsid(virion)protein 2(VP2)gene of each FPV-positive sample was sequenced and amplifed,yielding 65 VP2 *** them,six VP2 gene sequences were detected in the majority of the samples test positive for FPV,and these positive samples originated from a diverse range of geographical *** isolates were named FPV-6,FPV-10,FPV-15,FPV-251,FPV-271 and ***,the substitution of Ala300Pro(A300P)in VP2 was detected for the frst time in feline-derived FPV(FPV-251).FPV-251 isolate,with this substitution in VP2 protein,exhibited stable proliferative capacity in Madin-Darby canine kidney(MDCK)cells and A72 ***-271 was selected as the FPV control isolate due to its single amino acid diference from VP2 protein of FPV-251 at position 300(FPV-271 has alanine,while FPV-251 has proline).After oral infection,both FPV-251 and FPV-271 isolates caused feline panleukopenia,which is characterized by clinical signs of ***,FPV-251 can infect dogs through the oral route and cause gastrointestinal(GI)symptoms with lesions in the intestine and mesenteric lymph nodes(MLNs)of infected *** is the frst report on the presence of an A300P substitution in VP2 protein of feline-derived ***,FPV isolate with a substitution of A300P at VP2 protein demonstrated

关键词： Feline panleukopenia virus FPV Dogs VP2 gene characteristic Host range

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