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Petrogenesis and tectonic implications of the silurian adakitic granitoids in the eastern segment of the Qilian Orogenic Belt,Northwest china

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Acta Geochimica 2024年第1期43卷 72-86页

作者： Jiao-Long Zhao Xiao-Jun Huang Pei-Qing Hu Zhen-Xi Yang Ying Fan Er-Teng Wang Fu-Bo Yang Jing-Yu Zhang school of earth sciences Key Laboratory of Mineral Resources in Western China(Gansu Province)Lanzhou UniversityLanzhou 730000China Nuclear Industry 247 Brigade Tianjin North China Geological Survey BureauTianjin 301800China Fourth Institute of Geological and mineral Exploration of gansu Provincial Bureau of Geology and mineral resources Jiuquan 735000China

Geodynamic mechanism responsible for the generation of silurian granitoids and the tectonic evolution of the Qilian orogenic belt remains controversial. In this study, we report the results of zircon U–Pb age, and systematic whole-rock geochemical data for the Haoquangou and Liujiaxia granitoids within the North Qilian orogenic belt and the Qilian Block, respectively, to constrain their petrogenesis, and the silurian tectonic evolution of the Qilian orogenic belt. Zircon U–Pb ages indicate that the Haoquangou and Liujiaxia intrusions were emplaced at423 ± 3 Ma and 432 ± 4 Ma, respectively. The Haoquangou granodiorites are calc-alkaline, while the Liujiaxia granites belong to the high-K calc-alkaline *** are peraluminous in composition and have relatively depleted Nd isotopic [ε_(Nd)(t) =(-3.9 – + 0.6)] characteristics compared with regional basement rocks, implying their derivation from a juvenile lower crust. They show adakitic geochemical characteristics and were generated by partial melting of thickened lower continental crust. Postcollisional extensional regime related to lithospheric delamination was the most likely geodynamic mechanism for the generation of the Haoquangou granodiorite, while the Liujiaxia granites were generated in a compressive setting during continental collision between the Qaidam and Qilian blocks.

关键词： silurian adakitic granitoids Petrogenesis Tectonic setting Qilian Orogenic Belt

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Megafossils of Betulaceae from the Oligocene of Qaidam Basin and their paleoenvironmental and phytogeographic implications

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Plant Diversity 2024年第1期46卷 101-115页

作者： Tao Yang Jia-Hao Cai Yan-Zhi Dai Hong-Yu Chen Lei Han Li Zhang Wei-Yu Liang Xu-Jun Li Wen-Jia Li Jing-Yu Wu san-Ping Xie De-Fei Yan school of earth sciences and key laboratory of mineral resources in western china(gansu province) Lanzhou UniversityLanzhou 730000China key laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China state key laboratory of Palaeobiology and stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Center for Research and Education on Biological Evolution and Environments School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China

Understanding the paleoenvironment and phytogeographical history of the Tibetan Plateau,china relies on discovering new plant *** Qaidam Basin has long been regarded as an ideal‘field laboratory’to investigate the paleoclimate and paleobiological evolution of the northern Tibetan ***,fossil angiosperms from the Qaidam Basin are rare,and our knowledge of its paleovegetation is ***,we report fossil leaves and fruits of Betulaceae found from the Oligocene shangganchaigou Formation of northwestern Qaidam Basin(Huatugou area).Comparative morphological analysis led us to assign the fruits to the Betula subgenus Betula and the leaves to Carpinus *** findings,together with other reported fossil plants from the same locality,reveal a close floristic linkage between the Qaidam Basin and Europe during the *** northern pathway of this floristic exchange may have crossed through the Qaidam Basin during the late *** floristic linkage may have been facilitated by the continuous narrowing of the Turgai strait and stronger westerlies,which transported moisture and provided favorable climatic ***,fossil plants collected from the Qaidam Basin suggest that during the Oligocene this region had warm and humid deciduous broad-leaf forest,which differs from the region’s modern vegetation and indicates that the Qaidam Basin may have been a suitable region for these plants to flourish and spread during the Oligocene.

关键词： Paleoenvironment Biogeography Betulaceous fossil Qaidam basin Tibetan Plateau Oligocene

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spatiotemporal variations in glacier area and surface velocity of the northern Antarctic Peninsula during 2018-2022

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Advances in Climate Change Research 2024年第2期15卷 297-311页

作者： Yu-Long KANG shi-Chang KANG Wan-Qin GUO Tao CHE Zong-Li JIANG Zhen-Feng WANG Qiang-Qiang XU Cheng-De YANG state key laboratory of Cryospheric science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of sciences Beijing 100083China key laboratory of Remote sensing of gansu province Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China school of earth sciences and spatial Information Engineering Hunan University of Science and TechnologyXiangtan 411201China

Ice sheet serves as a crucial indicator for assessing climate *** loss in recent remote sensing-based studies indicated that the Antarctic Peninsula has rapid rates of glacier retreat and speed up of surface ***,observations of seasonal variability of ice speed are limited,and glacier-area changes require multi-temporal *** study investigated the changes in area and surface velocities of∼375 glaciers on the northern Antarctic Peninsula(NAP)utilizing satellite images acquired by the sentinel 1&2 satellites during *** results indicate that the glacier area reduced by approximately 166.1±44.2 km^(2)(-0.2%±0.1%per year)during the study period,with an acceleration after 2020(-0.4%±0.3%per year),and the most dramatic reduction happened on the eastern *** maximum annual ice speeds on the NAP generally exceeded 3500 m per year,while the ice speeds in 2021 were the highest(exceeded 4210 m per year).The ice speed variability in austral autumn was higher than in other seasons,meanwhile the summer ice speeds showed an increasing *** glacier G012158E47018N,McNeile Glacier,glacier G299637E64094s and Drygalski Glacier showed the most remarkable ice speed variations represented by high daily velocities and strong fluctuations on their *** results demonstrated that the variations in glacier area and seasonal ice speed on the NAP were responsive to the ice-ocean-atmosphere ***,seasonal velocity and area variations should be considered when conducting accurate mass balance calculations,model validations and change mechanism analyses under climate warming scenarios.

关键词： Glacier area seasonal ice speed sentinel 1&2 Northern Antarctic Peninsula Ice-ocean-atmosphere processes

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Comparison of bulk snow density measurements using different methods

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Advances in Climate Change Research 2024年第4期15卷 658-668页

作者： Hang sU Xin-Yue ZHONG Bin CAO Yuan-Tao HU Lei ZHENG Tingjun ZHANG state key laboratory of Water resources and Hydropower Engineering science Wuhan UniversityWuhan 430072China key laboratory of Remote sensing of gansu province Heihe Remote Sensing Experimental Research StationNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China key laboratory of Tibetan Plateau earth system Environment and ResourcesNational Tibetan Plateau Data CenterInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Climate Centre of shaanxi province Xi'an71000China school of Geospatial Engineering and science Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China key laboratory of Westem china's Environmental systems(Ministry of Education).College of earth and Environmental sciences Lanzhou Universiny Lanzhou 730000China

snow density is one of the basic properties used to describe snow cover characteristics,and it is critical for remote sensing retrieval,water resources assessment and modeling *** are many instruments available to measure snow density in ***,there are mea-surement errors of snow density for bulk and layers or gravimetric and electronic instruments,which may affect the accuracy of remote sensing retrieval and model *** in china,due to the noticeable heterogeneity of snowpacks,it is necessary to evaluate in detail the performance and applicability of snow density instruments in different snowpack *** study evaluated the performance of different snow density instruments:the Federal sampler,the model Vs-43 snow density cylinder(Vs-43),the wedge snow density cutter(WC1000 and WC25O),and the snow *** average bulk snow density of all instrument measurements was set as the reference value for *** results showed that as compared with the reference,the Vs-43 cylinder presented the best performance for bulk snow density measurement in the measured range with the lowest RMsE(11 kg m-3),BIAs(3 kg m-3),and MRE(1.6%).For layer observation,bulk snow density was overestimated by 8.1%with WC1000 and underestimated by 11.4%with snow Fork which was the worst performance compared with the reference value,and there were greater measurement errors of snow density in the depth hoar than other snow *** with grassland,the uncertainty of snow density measurements was slightly lower in ***,the Federal sampler and Vs-43 cylinder are more suitable for bulk snow density measurement in deep snowpack regions across china,and it is recommended to use WC1000,WC250 and snow Fork to measure the snow density of snow layers in the snow stratigraphy.

关键词： snowdensity Measurement Uncertainty comparison

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New potential barite reference materials for LA-MC-ICP-Ms sulfur isotope analysis with application to hydrothermal barite in the Huayangchuan deposit， western china

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Journal of earth science 2024年

作者： Jiali Fu Xinqian He Zhaochu Hu shuo Yin Jian Ma Kaiyun Chen Wen Zhang National key laboratory of Prospecting， Mining and Remote sense Detecting on Uranium resources， East china University of Technology state key laboratory of Nuclear resources and Environment， East china University of Technology school of earth sciences， East china University of Technology state key laboratory of Geological Processes and mineral resources， china University of Geosciences Wuhan state key laboratory of Continental Dynamics， Department of Geo logy， Northwest University

sulfur isotopes of s-bearing materials are powerful tools to trace various geological processes and sulfur sources in earth sciences， especially in ore deposits where sulfide-sulfate pair coprecipitates widely. However， in-situ s isotope determination of barite is challenging without natural matrix-matched reference material. In this study， we present two natural barite reference materials （1-Ys and 294-Ys） for in-situ sulfur isotopic analysis. Independent LA-MC-ICP-Ms laboratories were utilized to test the δ34s micron-scale homogeneity of 1-Ys and 294-Ys barites that have 2s repeatabilities of better than ±0.45 ‰ and ±0.41 ‰， respectively. Meanwhile， the in-situ analysis results are consistent with the results of the bulk analysis by Gs-IRMs within uncertainty. The grand mean δ34s values of 1-Ys （13.37‰ ± 0.42 ‰， 2s） and 294-Ys （14.38‰ ± 0.44 ‰， 2s） are the final recommended values obtained from four independent laboratories. All the results confirm the suitability of 1-Ys and 294-Ys barite used as calibration materials with respect to in-situ s isotopic analysis. Moreover， the new developed barite reference materials were used as matrix-matched standard to calibrate the barite samples from the Huayangchuan carbonatite-hosted U-polymetallic deposit （Qinling orogenic belt， western china） to obtain δ34s values. Utilizing the temperature-dependent δ34s fractionation of barite-pyrite pair， we calculate the formation temperature of barite （i.e.， 506 to 537 ℃） and the δ34s value of mineralizing fluid （i.e.， -7.11‰ to -7.59 ‰） in the Huayangchuan deposit. The results indicate an involvement of sedimentary sulfur， presumably acting as a potential uranium source （e.g.， upper crustal materials） for the giant Huayangchuan deposit.

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slippery hydrogel with desiccation-tolerant‘skin’for high-precision additive manufacturing

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International Journal of Extreme Manufacturing 2024年第2期6卷 486-500页

作者： Desheng Liu Pan Jiang Yue Hu Yaozhong Lu Yixian Wang Jiayu Wu Danli Hu Tao Wu Xiaolong Wang state key laboratory of solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China CAs key laboratory of Chemistry of Northwestern Plant resources Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China shandong laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai Zhongke Research Institute of Advanced Materials and Green Chemical EngineeringYantai 264006People’s Republic of China key laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region School of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832003People’s Republic of China

Hydrogels inevitably undergo dehydration,structural collapse,and shrinkage deformation due to the uninterrupted evaporation in the atmosphere,thereby losing their flexibility,slipperiness,and manufacturing ***,we propose a novel bioinspired strategy to construct a spontaneously formed‘skin’on the slippery hydrogels by incorporating biological stress metabolites trehalose into the hydrogel network,which can generate robust hydrogen bonding interactions to restrain water *** contents of trehalose in hydrogel matrix can also regulate the desiccation-tolerance,mechanical properties,and lubricating performance of slippery hydrogels in a wide *** vat photopolymerization three-dimensional printing and trehalose-modified slippery hydrogels enables to achieve the structural hydrogels with high resolution,shape fidelity,and sophisticated architectures,instead of structural collapse and shrinkage deformation caused by *** thus,this proposed functional hydrogel adapts to manufacture large-scale hydrogels with sophisticated architectures in a long-term *** a proof-of-concept demonstration,a high-precision and sophisticated slippery hydrogel vascular phantom was easily fabricated to imitate guidewire ***,the proposed protocol is universally applicable to diverse types of hydrogel *** strategy opens up a versatile methodology to fabricate dry-resistant slippery hydrogel for functional structures and devices,expanding their high-precision processing and broad applications in the atmosphere.

关键词： slippery hydrogel trehalose desiccation tolerance vat photopolymerization 3D printing hydrogen bonding

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Defining the We-map Reference Frames and Providing Mathematical Expressions for Transformation Relations

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Journal of Geodesy and Geoinformation science 2024年第3期7卷 76-88页

作者： WANG Xiaolong YAN Haowen WANG Zhuo MA Wenjun YU Yitao College of earth and Environmental sciences Lanzhou UniversityLanzhou 730000China key laboratory of western china’s Environmental systems Ministry of EducationLanzhou 730000China Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhou 730070China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic state Monitoring Lanzhou 730070China gansu Provincial key laboratory of science and Technology in surveying&Mapping Lanzhou 730070China school of Resource and Environmental sciences Wuhan UniversityWuhan 430072China

We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile ***,the study of direction systems and coordinate systems is critical,and exploring reference frames is essential in direction and coordinate *** its significance,existing research on We-map lacks specific solutions for the exploration of reference frames is indispensable for the establishment of accurate direction and coordinate *** this paper,we endeavor to address this gap by elucidating the significance of We-map reference frames,defining them with mathematical constraints,summarizing their nature and characteristics,deriving their transformation relationships and representing them through mathematical formulars and *** work contributes to the fundamental theory of We-map and provides valuable systems and support for the mathematical foundation of We-map,map production,and platform ***,this research serves to advance the development of We-map.

关键词： We-map reference frames spatial direction relation coordinate system

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Boosting Peroxymonosulfate Activation via Co-Based LDH-Derived Magnetic Catalysts:A Dynamic and static state Assessment of Efficient Radical-Assisted Electron Transfer Processes

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Energy & Environmental Materials 2024年第5期7卷 305-316页

作者： Wenhan Yang Junming Xia Fanfan shang Ge Ge Yang Bin Wang Hairui Cai Lingyun Jing Hao Zhu shengchun Yang Chao Liang Guosheng shao MOE key laboratory for Nonequilibrium synthesis and Modulation of Condensed Matter School of Physics National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology Xi’an Jiaotong University state key laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications College of Petroleum and Chemical Engineering Lanzhou University of Technology key laboratory of western china’s Environmental systems (Ministry of Education) and gansu Engineering Research Center of Fine Particles Pollution Control Technology and Equipment College of Earth and Environmental Sciences Lanzhou University state Center for International Cooperation on Designer Low-Carbon & Environmental Materials (CDLCEM) School of Materials Science and Engineering Zhengzhou University

Heterogeneous catalysts promoting efficient production of reactive species and dynamically stabilized electron transfer mechanisms for peroxomonosulfates （PMs） still lack systematic investigation. Herein, a more stable magnetic layered double oxides （CFLDO/N-C）, was designed using selfpolymerization and high temperature carbonization of dopamine. The CFLDO/N-C/PMs system effectively activated PMs to remove 99%(k=0.737 min-1) of tetracycline （TC） within 10 min. The CFLDO/N-C/PMs system exhibited favorable resistance to inorganic anions and natural organics, as well as satisfactory suitability for multiple pollutants. The magnetic properties of the catalyst facilitated the separation of catalysts from the liquid phase, resulting in excellent reproducibility and effectively reducing the leaching of metal ions. An electronic bridge was constructed between cobalt （the active platform of the catalyst） and PMs, inducing PMs to break the O-O bond to generate the active species. The combination of static analysis and dynamic evolution confirmed the effective adsorption of PMs on the catalyst surface as well as the strong radical-assisted electron transfer process. Eventually, we further identified the sites where the reactive species attacked the TC and evaluated the toxicity of the intermediates.

关键词： advanced oxidation process degradation mechanisms electron transport layered double hydroxide reactive species

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storage, form, and influencing factors of karst inorganic carbon in a carbonate area in china

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science china earth sciences 2024年第3期67卷 725-739页

作者： Chaochao DU Xiaoyong BAI Yangbing LI Qiu TAN Cuiwei ZHAO Guangjie LUO Luhua WU Fei CHEN Chaojun LI Chen RAN sirui ZHANG Lian XIONG Fengjiao sONG Biqin XIAO Zilin LI Yingying XUE Mingkang LONG Qing LUO Xiaoyun ZHANG Minghui LI Xiaoqian sHEN shu YANG state key laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China school of Geography and Environmental sciences Guizhou Normal UniversityGuiyang 550001China CAs Center for Excellence in Quaternary science and Global Change Xi'an 710061China Guizhou Provincial key laboratory of Geographic state Monitoring of Watershed Guizhou Normal CollegeGuiyang 550018China College of resources and Environmental Engineering Guizhou UniversityGuiyang 550025China

Carbonate rock chemical weathering carbon sinks reduce the rate of increase of the atmospheric CO_(2) concentration and global warming. However, uncertainty still exists in the estimation results of carbonate rock chemical weathering carbon sink fluxes(CCsF), and the contributions of climate change and ecological restoration to the CCsF are not clear. To this end, we compiled published site data on ion concentrations in different watersheds in china and used a classical thermodynamic dissolution model to reassess the potential and spatial and temporal patterns of the CCsF in china from 1991 to 2020. We quantified the contributions of temperature(MAT), precipitation(MAP), evapotranspiration(ET), soil water(sM), and the normalized difference vegetation index(NDVI) to the CCsF. The results revealed that(1) china's CCsF was 22.76 t CO_(2)km^(-2)yr^(-1), which was higher than the global average(15.77 t CO_(2)km^(-2)yr^(-1)). The total carbonate rock chemical weathering carbon sink(CCs) was 4772.67×10^(4)t CO_(2), contributing 14.91% of the global CCs through a carbonate rock area of 252.98×10^(4)km^(-2).(2) china's CCsF decreased gradually from southeast to northwest, with values of 33.14, 12.93, and7.27 t CO_(2)km^(-2)yr^(-1)in the southern karst, Qinghai-Tibetan karst, and northern karst regions, respectively.(3) The overall CCsF in china exhibited an increasing trend from 1991 to 2020, with a rate of increase of 0.16 t CO_(2)km^(-2)yr^(-1).(4) The contributions of the MAP, MAT, ET, sM, and NDVI to the CCsF were 63.3%, 3.02%, 27.5%, 3.1%, and 3.05%, respectively. Among them, the increase in precipitation was the main contributor to the increase in the CCsF in china over the last 30 years, while the enhancement of ET offset part of the positive contribution of the increase in precipitation to the CCsF. In conclusion, the results of this study provide a systematic quantification of the magnitude, the patterns, and the influencing factors of CCs over a long time series in

关键词： Carbonate rocks Carbon sinks Patterns Influencing factors Thermodynamic dissolution modeling

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Himalayas as a global hot spot of springtime stratospheric intrusions:Insight from isotopic signatures in sulfate aerosols

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Research in Cold and Arid Regions 2024年第1期16卷 5-13页

作者： Kun Wang shiChang Kang Mang Lin PengFei Chen ChaoLiu Li XiuFeng Yin shohei Hattori Teresa L.Jackson JunHua Yang YiXi Liu Naohiro Yoshida Mark HThiemens state key laboratory of Cryospheric science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China state key laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryCASGuangzhouGuangdong 510640China University of Chinese Academy of sciences Beijing 100049China International Center for Isotope Effects Research(ICIER) School of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Frontiers science Center for Critical earth Material Cycling State Key Laboratory for Mineral Deposits ResearchSchool of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Department of Chemical science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohamaKanagawa 226-8502Japan Department of Chemistry and Biochemistry University of California San DiegoLa JollaCA 92093-0021USA earth-Life science Institute Tokyo Institute of TechnologyMeguro-kuTokyo 152-8551Japan National Institute of Information and Communications Technology KoganeiTokyo 184-8795Japan

Downward transport of stratospheric air into the troposphere(identified as stratospheric intrusions)could potentially modify the radiation budget and chemical of the earth's surface *** the highest and largest plateau on earth,the Tibetan Plateau including the Himalayas couples to global climate,and has attracted widespread attention due to rapid warming and cryospheric *** studies recognized strong stratospheric intrusions in the Himalayas but are poorly understood due to limited direct evidences and the complexity of the meteorological dynamics of the third ***^(35)s is a radioactive isotope predominately produced in the lower stratosphere and has been demonstrated as a sensitive chemical tracer to detect stratospherically sourced air mass in the planetary boundary ***,we report 6-month(April–september 2018)observation of^(35)s in atmospheric sulfate aerosols(^(35)sO_(4)^(2-))collected from a remote site in the Himalayas to reveal the stratospheric intrusion phenomenon as well as its potential impacts in this *** the sampling campaign,the^(35)sO_(4)^(2-)concentrations show an average of 1,070±980 atoms/m^(3).In springtime,the average is 1,620±730 atoms/m^(3),significantly higher than the global existing data measured so *** significant enrichments of^(35)sO_(4)^(2-)measured in this study verified the hypothesis that the Himalayas is a global hot spot of stratospheric intrusions,especially during the springtime as a consequence of its unique geology and atmospheric *** combined with the ancillary evidences,e.g.,oxygen-17 anomaly in sulfate and modeling results,we found that the stratospheric intrusions have a profound impact on the surface ozone concentrations over the study region,and potentially have the ability to constrain how the mechanisms of sulfate oxidation are affected by a change in plateau atmospheric properties and *** study provides new observational constraints on stra

关键词： Himalayas stratospheric intrusions Cosmogenic^(35)sO_(4)^(2-) Ozone Atmospheric oxidation

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