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Geochronology and geochemistry of Permo-Triassic sandstones in eastern Jilin Province(NE China): Implications for final closure of the Paleo-Asian Ocean

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Geoscience Frontiers 2019年第2期10卷 683-704页

作者： qingxiang du Zuozhen Han Xiaoli Shen Chao Han Zhigang Song Lihua Gao Mei Han Wenjian Zhong College of Earth Science and Engineering Shandong University of Science and Technology Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Key Laboratory of Depositional Mineralization & Sedimentary Mineral of Shandong Province Shandong University of Science and Technology

In the eastern part of the Central Asian Orogenic Belt(CAOB) in northeastern(NE) China, scattered outcrops of molasse deposits mark the ending of an orogeny and are crucial for understanding the evolution of the Paleo-Asian Ocean(PAO). However, the timing of tectonic events and the relationships among these strata remain controversial. To better constrain these geologic events, a comprehensive study of the detrital zircon U-Pb geochronology and geochemistry of the sandstones of the Kaishantun(KST) Formation and Kedao(KD) Group in eastern Jilin Province, NE China, was conducted. The KST Formation is traditionally considered a molasse deposit. The sandstones display low CIA, PIA and high ICV values and low Th/U and Rb/Sr ratios, which suggest that the rocks were derived from an immature intermediate-felsic igneous source and experienced a simple sedimentary recycling history with relatively weak chemical weathering. LA-ICP-MS U-Pb dating of detrital zircons from two samples of the KST Formation yields ages of 748-252 Ma, suggesting that the KST Formation was deposited between 254.5 Ma and 252 Ma in Late Permian. The zircons were mainly derived from the continental northern part of the North China Craton(NCC). In contrast, the U-Pb dating of detrital zircons from five samples of the KD Group yields ages of 2611-230 Ma, suggesting that the KD samples were deposited in the Early to Middle Triassic(ca. 248-233 Ma). The detrital zircon ages for the KD samples can be divided into groups with peaks at 2.5 Ga, 1.8 Ga, 800-1000 Ma, 500 Ma and 440-360 Ma, which suggest that the samples were derived from bidirectional provenances in the Jiamusi-Khanka Block and the NCC. These new data,combined with previously published results, suggest that at least three orogenic events occurred in central-eastern Jilin Province during the Early Permian(270-262 Ma), Early Triassic(254-248 Ma) and Middle-Late Triassic(242-227 Ma). The final closure of the PAO occurred during 242-227 Ma in the Middle-Late Triassic along the Changchun-Yanji sut

关键词： Detrital zircon Molasse Orogenic events Changchun-Yanji suture zone Paleo-Asian Ocean

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国内外三维预制件针刺专利技术对比

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上海纺织科技 2024年第4期52卷 23-28页

作者：杜庆祥崔江红范臻徐航丁旭李晟源中原工学院机电学院河南郑州450007 常熟万龙机械有限公司江苏常熟215500 中原工学院先进纺织装备技术省部共建协同创新中心河南郑州450007

对国内外已公开的三维非织造针刺技术相关专利进行对比分析得出,现有的三维针刺设备均存在一定的局限性,尤其是用于航空、航天等领域的耐高温、制动件等,加工要求和制造成本较高,导致无法大规模推广使用。为了进一步解决三维预制件的加... 详细信息

对国内外已公开的三维非织造针刺技术相关专利进行对比分析得出,现有的三维针刺设备均存在一定的局限性,尤其是用于航空、航天等领域的耐高温、制动件等,加工要求和制造成本较高,导致无法大规模推广使用。为了进一步解决三维预制件的加工成型问题,综述了国内外发明专利技术的优缺点,对三维针刺技术专利的发展进行了对比研究,并对未来发展趋势进行了展望。

关键词：非织造三维针刺预制件针刺技术专利技术对比分析

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新型吸气式特种纤维非织造梳理机设计与实践

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上海纺织科技 2024年第5期52卷 81-84,89页

作者：丁旭崔江红范臻徐航杜庆祥李晟源中原工学院机电学院河南郑州450007 常熟万龙机械有限公司江苏常熟215500 中原工学院先进纺织装备技术省部共建协同创新中心河南郑州450007

针对玄武岩等特种纤维在使用常规梳理机进行梳理、转移过程中易出现掉网、乱网、出棉不连续、转移率低等问题,在常规非织造梳理机设计基础上结合气流成网技术,研发了一款吸气式特种纤维非织造梳理机。介绍了特种纤维梳理机的工作原理以... 详细信息

针对玄武岩等特种纤维在使用常规梳理机进行梳理、转移过程中易出现掉网、乱网、出棉不连续、转移率低等问题,在常规非织造梳理机设计基础上结合气流成网技术,研发了一款吸气式特种纤维非织造梳理机。介绍了特种纤维梳理机的工作原理以及整机结构设计方案,并通过玄武岩纤维梳理试验验证了整机的可靠性,为特种纤维梳理机的产业化提供了一种可行的技术方案。

关键词：特种纤维玄武岩纤维梳理机非织造梳理机吸气式梳理机

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Record-breaking High-temperature Outlook for 2023: An Assessment Based on the China Global Merged Temperature(CMST) Dataset

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Advances in Atmospheric Sciences 2024年第2期41卷 369-376页

作者： Zichen LI qingxiang LI Tianyi CHEN School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disasters SUN Yat-Sen UniversityZhuhai 519082China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China Southern Laboratory of Ocean Science and Engineering(Guangdong Zhuhai) Zhuhai 519082China

According to the latest version(version 2.0) of the China global Merged Surface Temperature(CMST2.0) dataset, the global mean surface temperature(GMST) in the first half of 2023 reached its third warmest value since the period of instrumental observation began, being only slightly lower than the values recorded in 2016 and 2020, and historically record-breaking GMST emerged from May to July 2023. Further analysis also indicates that if the surface temperature in the last five months of 2023 approaches the average level of the past five years, the annual average surface temperature anomaly in 2023 of approximately 1.26°C will break the previous highest surface temperature, which was recorded in 2016of approximately 1.25°C(both values relative to the global pre-industrialization period, i.e., the average value from 1850 to1900). With El Ni?o triggering a record-breaking hottest July, record-breaking average annual temperatures will most likely become a reality in 2023.

关键词： CMST2.0 global mean surface temperature record-breaking temperature El Ni?o

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Generalized nth-Order Perturbation Method Based on Loop Subdivision Surface Boundary Element Method for Three-Dimensional Broadband Structural Acoustic Uncertainty Analysis

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 2053-2077页

作者： Ruijin Huo qingxiang Pei Xiaohui Yuan Yanming Xu College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China Henan Unsaturated Soil and Special Soil Engineering Technology Research Center Xinyang Normal UniversityXinyang464000China Henan International Joint Laboratory of Structural Mechanics and Computational Simulation College of Architecture and Civil EngineeringHuanghuai UniversityZhumadian463000China

In this paper,a generalized nth-order perturbation method based on the isogeometric boundary element method is proposed for the uncertainty analysis of broadband structural acoustic scattering problems.The Burton-Miller method is employed to solve the problem of non-unique solutions that may be encountered in the external acoustic field,and the nth-order discretization formulation of the boundary integral equation is derived.In addition,the computation of loop subdivision surfaces and the subdivision rules are introduced.In order to confirm the effectiveness of the algorithm,the computed results are contrasted and analyzed with the results under Monte Carlo simulations(MCs)through several numerical examples.

关键词： Perturbation method loop subdivision surface isogeometric boundary element method uncertainty analysis

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Sensitive measurement of silver ions in environmental water samples integrating magnetic ion-imprinted solid phase extraction and carbon dot fluorescent sensor

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Chinese Chemical Letters 2024年第5期35卷 272-276页

作者： Shuangying Li qingxiang Zhou Zhi Li Menghua Liu Yanhui Li State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of Petroleum-BeijingBeijing 102249China

Increasing use of silver in various fields has caused Ag^(+)pollution in water environment,taking great threats to people’s health.As a consequence,establishing rapid and reliable methods for sensitive determination of Ag^(+)is of great significance.Fluorescent(FL)sensors based on carbon dots(CDs),an excellent carbonaceous nanomaterial with strong and stable fluorescence,have absorbed extensive attentions in analysis of pollutants due to its advantages of carbon sources being readily available,low cost,easy operation and fast response.Moreover,ion-imprinting is a better way to increase the selectivity of the proposed method.Present work described an effective method for the sensitive measurement of silver ion in water samples in combination with magnetic ion-imprinted solid phase extraction and CDs based fluorescent sensor,which took full advantages of easy separation and high enrichment of magnetic solid phase extraction,high selectivity of ion-imprinting technology,and sensitivity and rapid response of fluorescent sensor from CDs.Sulfur-doped CDs derived from dithizone and magnetic ion-imprinted nanomaterial were prepared,and characterized with Fourier transform infrared spectroscopy and transmission electron microscope,etc.Magnetic Ag^(+)imprinted nanomaterial based solid phase extraction was employed for separating and enriching Ag^(+)from water samples.The significant parameters were optimized in detail.Under the optimal conditions,the proposed method provided good linearity in the range of 0.01-0.4μmol/L and low detection limit of 3 nmol/L.The reliability of the proposed method was validated with real water samples,and the results demonstrated that the proposed method was simple,robust,selective and sensitive detection tool for Ag^(+)in real water samples.

关键词： Carbon dots Ag^(+) Magnetic ion-imprinting Magnetic solid phase extraction Fluorescent sensor

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RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 337-359页

作者： Hangtian Song Xudong Chen Chun Zhu Qian Yin Wei Wang qingxiang Meng Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China Research Institute of Geotechnical Engineering Hohai UniversityNanjing210098China School of Earth Sciences and Engineering Hohai UniversityNanjing210098China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China

When the geological environment of rock masses is disturbed,numerous non-persisting open joints can appear within it.It is crucial to investigate the effect of open joints on the mechanical properties of rock mass.However,it has been challenging to generate realistic open joints in traditional experimental tests and numerical simulations.This paper presents a novel solution to solve the problem.By utilizing the stochastic distribution of joints and an enhanced-fractal interpolation system(IFS)method,rough curves with any orientation can be generated.The Douglas-Peucker algorithm is then applied to simplify these curves by removing unnecessary points while preserving their fundamental shape.Subsequently,open joints are created by connecting points that move to both sides of rough curves based on the aperture distribution.Mesh modeling is performed to construct the final mesh model.Finally,the RB-DEM method is applied to transform the mesh model into a discrete element model containing geometric information about these open joints.Furthermore,this study explores the impacts of rough open joint orientation,aperture,and number on rock fracture mechanics.This method provides a realistic and effective approach for modeling and simulating these non-persisting open joints.

关键词： Non-persisting rough open joints stochastic distribution of joints enhanced-IFS method RB-DEM

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New Evidence of Detrital Zircon Ages for the Final Closure Time of the Paleo-Asian Ocean in the Eastern Central Asian Orogenic Belt(NE China)

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1910-1914页

作者： du qingxiang HAN Zuozhen SHEN Xiaoli HAN Chao SONG Zhigang GAO Lihua HAN Mei ZHONG Wenjian YAN Junlei College of Earth Science and Engineering Shandong University of Science and Technology Qingdao 266590 Shandong China Shandong Provincial Key Lab of Depositional Mineralization and Sedimentary Minerals Shandong University of Science and Technology Qingdao 266590 Shandong China Key Laboratory for Sedimentary Basin and Oil and Gas Resourcesy Ministry of Land and Resources Qingdao 266590 Shandong China

Objective The NE China is located in the eastern segment of the Central Asian Orogenic Belt（CAOB）,which is a large accretionary orogen between the Siberian Craton and the North China Craton（NCC）.Many researches ha... 详细信息

关键词： Th NE China New Evidence of Detrital Zircon Ages for the Final Closure Time of the Paleo-Asian Ocean in the Eastern Central Asian Orogenic Belt OHS NCC Pb

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吉林省延边地区中酸性岩浆岩年龄、成因及其构造意义

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吉林大学学报（地球科学版） 2022年第4期52卷 1174-1202页

作者：李光速杜庆祥韩作振沈晓丽山东省沉积成矿作用与沉积矿产重点实验室(山东科技大学)/山东科技大学地球科学与工程学院山东青岛266590

华北板块北缘东段延边地区新发现古生代花岗闪长岩和变质流纹岩,本文对其进行了LA-ICP-MS锆石U-Pb年代学、锆石Hf同位素、地球化学及Sr-Nd同位素分析,探讨了花岗闪长岩和变质流纹岩的源区性质及构造背景,为延边地区古生代构造演化提供... 详细信息

华北板块北缘东段延边地区新发现古生代花岗闪长岩和变质流纹岩,本文对其进行了LA-ICP-MS锆石U-Pb年代学、锆石Hf同位素、地球化学及Sr-Nd同位素分析,探讨了花岗闪长岩和变质流纹岩的源区性质及构造背景,为延边地区古生代构造演化提供约束。锆石U-Pb定年结果显示,花岗闪长岩形成于(440.3±2.5)Ma,即早志留世;变质流纹岩形成于(345.3±2.3)Ma,即早石炭世。早志留世花岗闪长岩富集大离子亲石元素(如Rb、K、Ba、Cs、Th等),亏损高场强元素(如Nb、P、Ti等),属于I型花岗岩类;花岗闪长岩的ε(t)值为-0.63~1.30,古老的二阶段亏损地幔模式年龄为1461~1339 Ma,ε(t)值为-3.13~-2.76,二阶段模式年龄(T)为1433~1403 Ma,表明岩石可能是由幔源成分、地壳沉积物质和俯冲流体参与的中元古界下地壳成分混合形成;结合区域地质,认为早志留世华北板块北缘可能发育岛弧环境。早石炭世变质流纹岩地球化学特征显示轻稀土和大离子亲石元素相对富集,重稀土和高场强元素相对亏损,具有明显的正Eu异常,为A型流纹岩,代表了一种伸展环境;变质流纹岩ε(t)值为3.46~12.21,二阶段模式年龄为1132~571 Ma,表明岩石来源于年轻的下地壳部分熔融;结合区域地质,认为早石炭世华北板块北缘可能为被动大陆边缘。

关键词：花岗闪长岩变质流纹岩锆石U-Pb定年地球化学华北板块北缘东段构造演化

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Microwave-assisted exploration of the electron configuration-dependent electrocatalytic urea oxidation activity of 2D porous NiCo_(2)O_(4) spinel

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Journal of Energy Chemistry 2024年第4期91卷 226-235页

作者： Jun Wan Zhiao Wu Guangyu Fang Jinglin Xian Jiao Dai Jiayue Guo qingxiang Li Yongfei You Kaisi Liu Huimin Yu Weilin Xu Huiyu Jiang Minggui Xia Huanyu Jin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&FinishingWuhan Textile UniversityWuhan 430200HubeiChina Institute for Sustainability Energy and ResourcesThe University of AdelaideAdelaideSA 5005Australia Future Industries Institute University of South AustraliaMawson Lakes CampusAdelaideSA 5095Australia

Urea holds promise as an alternative water-oxidation substrate in electrolytic cells.High-valence nickelbased spinel,especially after heteroatom doping,excels in urea oxidation reactions(UOR).However,traditional spinel synthesis methods with prolonged high-temperature reactions lack kinetic precision,hindering the balance between controlled doping and highly active two-dimensional(2D)porous structures design.This significantly impedes the identification of electron configuration-dependent active sites in doped 2D nickel-based spinels.Herein,we present a microwave shock method for the preparation of 2D porous NiCo_(2)O_(4)spinel.Utilizing the transient on-off property of microwave pulses for precise heteroatom doping and 2D porous structural design,non-metal doping(boron,phosphorus,and sulfur)with distinct extranuclear electron disparities serves as straightforward examples for investigation.Precise tuning of lattice parameter reveals the impact of covalent bond strength on NiCo_(2)O_(4)structural stability.The introduced defect levels induce unpaired d-electrons in transition metals,enhancing the adsorption of electron-donating amino groups in urea molecules.Simultaneously,Bode plots confirm the impact mechanism of rapid electron migration caused by reduced band gaps on UOR activity.The prepared phosphorus-doped 2D porous NiCo_(2)O_(4),with optimal electron configuration control,outperforms most reported spinels.This controlled modification strategy advances understanding theoretical structure-activity mechanisms of high-performance 2D spinels in UOR.

关键词： 2D materials Spinel Microwave Electrocatalysis Urea oxidation reaction

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