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Acta Geologica Sinica(English Edition) 2023年第1期97卷 134-148页

作者： WU Jun LIU Ting WANG Fangyue Anhui Technical College of Industry and Economy Hefei 230051China Hefei University of Technology Hefei 230009China

The Fuchuan ophiolite is located in the northeasternmost segment of the Neoproterozoic Jiangnan orogen and consists mainly of harzburgites,with minor dunites,pyroxenite and gabbro veins and dykes.In order to investigate the genesis and tectonic setting of the Fuchuan ophiolite and chromitites,in situ analyses of unaltered chromites and silicates were carried out.Trace element analyses of unaltered chromites from the Fuchuan chromitites indicate the parental magma is of mid-ocean ridge basalt(MORB)-like origin,with the Ti/Fe^(3+#)–Ga/Fe^(3+#)diagram of chromites showing that the chromitites are a result of melt/rock interaction of MORB melts with mantle peridotites,and that the Fuchuan harzburgites present the dual features of MORB and supra-subduction zone peridotites(SSZP).Trace and rare earth element(REE)analyses of olivines and orthopyroxenes from the Fuchuan harzburgites hint at the possibility of mantle metasomatism influenced by SSZ-subducted fluids.Finally,integrating with previous study,the Fuchuan ophiolite and chromitites might have been formed in a back-arc spreading ridge between the Yangtze and Cathaysia blocks during the Neoproterozoic.

关键词： igneous petrology trace elements metasomatism back-arc ophiolite Precambrian

New Identification of Quaternary Uranium Mineralization at the Mianhuakeng Granite-Related Uranium Deposit,South China

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地球科学学刊:英文版 2023年第5期34卷 1635-1640页

作者： Long Zhang fangyue wang Ore Deposit and Exploration Centre School of Resources and Environmental EngineeringHefei University of TechnologyHefei 230009China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei 230009China

0 INTRODUCTION Granite-related uranium deposits are one of the most important types of uranium deposits in South China,and their genetic model generally involves uranium leaching from the preexisting rocks(mainly granites),U transport as uranyl carbonate and fluoride complexes and probably chloride complexes in hydrothermal solutions,and U precipitation caused by physicochemical changes(Chi et al.,2020;Hu et al.,2008).Mineralization ages of granite-related uranium deposits in South China have been a subject of significant controversy among researchers and were investigated using several methods,such as bulk uraninite U-Pb isotopic dating,in situ analytical techniques,pyrite Rb-Sr dating as well as bulk uraninite Sm-Nd dating(e.g.,Zhang et al.,2022;Zhong et al.,2019;Bonnetti et al.,2018;Luo et al.,2015;Huang et al.,2010;Ye,2005).

关键词： dating uranium Bonnet

Simplified method for analyzing soil slope deformation under cyclic loading

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第6期14卷 1967-1976页

作者： Ga Zhang Yaliang wang fangyue Luo State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing100084China

Reasonable assessment of slope deformation under cyclic loading is of great significance for securing the safety of slopes. The observations of centrifuge model tests are analyzed on the slope deformation behavior under cyclic loading conditions. The potential slip surface is the key for slope failure and follows two rules:(i) the relative horizontal displacement along the potential slip surface is invariable at an elevation, and(ii) the soil along the slip surface exhibits the same degradation pattern. These rules are effective regardless of the location of the potential slip surface throughout the entire deformation process of a homogeneous slope, ranging from the initial deformation stage to the failure process and to the post-failure stage. A new, simplified method is proposed by deriving the displacement compatibility equation and unified degradation equation according to the fundamental rules. The method has few parameters that can be determined through traditional element tests. The predictions from the proposed method agree with the centrifuge test results with vertical loading and shaking table loading. This result confirms that the proposed method is effective in predicting the full deformation process of slopes under different cyclic loading conditions.

关键词： Soil slope Cyclic load Deformation Centrifuge model test Slice method

Cathodoluminescence and Trace Element Composition of Scheelite from the Middle-Lower Yangtze River Metallogenic Belt(MLYB): Implications for Mineralization and Exploration

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Acta Geologica Sinica(English Edition) 2020年第6期94卷 1977-1996页

作者： NIE Liqing ZHOU Taofa CHEN Xuefeng WANG Fangyue XIAO Xin Ore Deposit and Exploration Centre(ODEC) School of Resources and Environmental EngineeringHefei University of TechnologyHefei 230009China School of Civil Engineering Anhui Jianzhu UniversityHefei 230601China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei 230009China

The Middle-Lower Yangtze River Metallogenic Belt(MLYB)is known to contain abundant copper and iron porphyry-skarn deposits,with an increasing number of tungsten deposits and scheelite in Fe-Cu deposits being discovered in the MLYB during recent decades.The ore genesis of the newly-discovered tungsten mineralization in the MLYB is poorly understood.We investigate four sets of scheelite samples from tungsten,iron and copper deposits,using CL imaging and LA-ICP-MS techniques to reveal internal zonation patterns and trace element compositions.The REE distribution patterns of four studied deposits show varying degrees of LREE enrichment with negative Eu anomalies.The oxygen fugacity of ore-forming fluid increased in Donggushan,while the oxygen fugacity of ore-forming fluid decreased in Ruanjiawan,Guilinzheng and Gaojiabang.The scheelites from the Donggushan,Ruanjiawan,Guilinzheng and Gaojiabang deposits show enrichment in LREEs and HFSE,with Nb/La ratios ranging from 1.217 to 52.455,indicating that the four tungsten deposits are enriched in the volatile fluorine.A plot of(La/Lu)N versus Mo/δEu can be used to distinguish quartz vein type,porphyry and skarn tungsten deposits.This study demonstrates that scheelite grains can be used to infer tungsten mineralization and are effective in identifying magmatic types of tungsten deposits in prospective mining sites.

关键词： scheelite trace elements tungsten mineralization Middle-Lower Yangtze River Metallogenic Belt

Mineralization,Geochemistry and Zircon U-Pb Ages of the Paodaoling Porphyry Gold Deposit in the Guichi Region,Lower Yangtze Metallogenic Belt,Eastern China

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Acta Geologica Sinica(English Edition) 2018年第2期92卷 706-732页

作者： DUAN Liu'an YANG Xiaoyong DENG Jianghong WANG Fangyue LEE Insung CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of China Hefei 230026 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China No. 7 Gold Geological Party of the Chinese People's Armed Police Force Yantai 264004 Shandong China Laboratory for Marine Mineral Resourees Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 Shandong China Center of Deep Sea Research Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 Shandong China School of Resources and Environmental Engineering Hefei University of Technology Hefei 230009 China School of Earth and Environmental Sciences Seoul National University Seoul 151- 742 Korea

The newly discovered Paodaoling porphyry Au deposit from the Guichi region, Lower Yangtze River Metallogenic Belt （LYRB）, contains 〉35 tons of Au at an average grade of -1.7 g/t. It is a porphyry ＇Au-only＇ deposit, as revealed by current exploration in the depths, mostly above -400 m, which is quite uncommon among coeval porphyry mineralization along the LYRB. Additionally, there are also Cu-Au bearing porphyries and barren alkaline granitoids in the Paodaoling district. Zircon LA-ICP-MS U-Pb dating of the Cu-Au-bearing porphyries yield an age of 141-140 Ma, falling within the main magmatic stage of the LYRB, whereas the barren granites give an age of 125-120 Ma, coeval with the regional A- type granites. The Cu-Au-bearing porphyries are LILE-, LREE-enriched and HFSE-depleted, typical of arc magmatic affinities. The barren granites are HFSE-enriched, with lower LREE/HREE ratios and pronounced negative Eu anomalies. The Cu-Au-bearing porphyries in the Paodaoling district have high oxygen fugacities and high water content. Pyrite sulfur isotopes of the Paodaoling gold deposit indicate a magmatic-sedimentary mixed source for the ore-forming fluids. Based on the alteration and poly-metal zonation of the deepest exploration drill hole from the Paodaoling Au deposit, we propose that Cu ore bodies could lie at depth beneath the current Au ore bodies. The magmatism and associated Cu-Au mineralization of the Paodaoling district are likely to have formed in a subduction setting, during slab rollback of the paleo-Pacific plate.

关键词： zircon U-Pb dating porphyry Au deposit Lower Yangtze River metallogenic belt （LYRB）,Paodaoling paleo-Pacific plate subduction

Geochronology and geochemistry of the W-Mo-ore-related granitic rocks from eastern Ningzhen,lower Yangtze river belt,eastern China

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Acta Geochimica 2022年第2期41卷 288-306页

作者： fangyue wang Yongjie Guo Haiyang Yan Haiou Gu He Sun Can Ge Present Address:School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China Ore Deposit and Exploration Center Hefei University of TechnologyHefei 230009China Anhui Institute of Geological Survey(Anhui Institute of Geological Sciences) Hefei 230001China

Here we present zircon U–Pb–Hf and wholerock major and trace element studies of eastern Ningzhen W-Mo-ore-related magmatic rocks,Yushan and Longwangshan granitic rocks,to constrain their form timing,magma sources,and tectonic settings.The results showed that the two plutons were formed in the Early Cretaceous with;Pb/;U ages of 107.8±1.2 and 105.2±1.5 Ma(;Pb/;U),respectively.The trapped/residual zircons are mainly distributed in 2.0–2.5 Ga.The two intrusions are characterized by high silicon(68.60–73.99%),high aluminum(13.56–15.02%),high Mg#(47–55),high Sr,Sr/Y,LaN/YN,and low Yb,falling into high Mg#adakitic rock region.The zirconεHf(t)values of the two intrusions range from-24.8 to-13.2,indicating an ancient continental crust in their magma sources.The average Ti-inzircon temperature is 689°C,slightly higher than those of other high-Mg adakitic rocks in the lower Yangtze River belt,but lower than those of high-Mg adakitic rocks in the Southern Tanlu Fault(STLF).Zircon Ce;/Ce;show low oxygen fugacity(LWS-1:3–400,average 92;sample ZYS-4:9–382,average 93).These geochemical features indicate a thickened lower continental crust in the Eastern Ningzhen region in a subduction setting.Comparing the geochemical characteristics of the eastern Ningzhen to the western Ningzhen and other areas in the Lower Yangtze River Metallogenic Belt(LYRMB)and the high-Mg ore-barren adakitic rocks of the STLF,we propose that the magmatic rocks from eastern Ningzhen may be mainly from a thickened lower continental crust that hybridized with a very small part of mantle sources,while the west Ningzhen magmatic rocks may have experienced a higher degree of mantle contaminations in their source.The metallogenic differences between the eastern(W–Mo)and western(Cu–Fe–Pb–Zn)parts of Ningzhen also indicate different proportions of crustal materials in their magma source.

关键词： Ancient lower continental crust Paleo-pacific plate High Mg#adaktic rocks Early cretaceous Ningzhen Crustal thickening

CorelKit:An Extensible CorelDraw VBA Program for Geoscience Drawing

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Journal of Earth Science 2023年第3期34卷 735-757页

作者： Junwu Zhang Xian Liang fangyue wang Huaikun wang Yu Fan Te Ba Xiangxi Meng School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China Mongolia Zhengyuan Co. LtdJinan 250101China

CorelKit is developed with the built-in VBA environment of CorelDraw?,and is a new plug-in in CorelDraw for geological and geochemical drawing.CorelKit can help users quickly and easily draw geological and geochemical graphs,such as scatterplot,triangular scatterplot,line chart,histogram,bar chart,box plot,pie graph,etc.In order to adapt to the geological application,the above functions are strengthened.Scatterplot and triangular scatterplot provide nearly 150 common basemaps,covering rock classification,structural environment discrimination,mineral genesis,isotope geochemistry,etc.,for the convenience of the user mapping.Meanwhile,CorelKit further provides a structural joint rose diagram and sulfur isotopic composition diagram.This software also has many practical functions such as Bézier line topology,Multiple Bézier lines close fill,Single inner fill,Correction basemap,Add a compass,Add a scale,which facilitates daily geological drawing.The software has a friendly interface,in both Chinese and English versions,and is suitable for CorelDraw X4 and later versions.We introduced the Bézier line topology to CorelKit for the first time,which is similar to the GIS®topology for geological maps.According to the“GB/T 958-2015 Geological Legends Used for Regional Geological Map”,a two-color filling library of rock pattern pictures is established,which is convenient to realize the twocolor filling of sedimentary rocks,metamorphic rocks and magmatic rocks patterns.Obviously,CorelKit makes up for many shortcomings of CorelDraw in geosciences and is a very practical tool for geoscience researchers.

关键词： CorelKit geoscience geochemistry data drawing CorelDraw VBA topology

Attribution of Persistent Precipitation in the Yangtze–Huaihe River Basin during February 2019

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Advances in Atmospheric Sciences 2020年第12期37卷 1389-1404页

作者： Zhixuan wang Jilin SUN Jiancheng WU fangyue NING Weiqi CHEN College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Key laboratory of Physical Oceanography Ocean University of ChinaQingdao 266100China Zhangzhou Meteorological Observatory Zhangzhou Meteorological BureauZhangzhou 363000China Huaan Meteorological Observatory Huaan Meteorological BureauZhangzhou 363800China

In February 2019,a month-long persistent precipitation event occurred in the Yangtze–Huaihe River basin.The geopotential height field that affected the duration of this frontal rainfall was divided into a high-latitude part and a lowlatitude part for analysis.In the high-latitude part,a two-wave structure led to quasi-stationary circulation,and the change of both the blocking high pressure and Arctic Oscillation phase caused cold air to invade South China continuously and changed the frontal position.In mid-to-low latitudes,the persistent precipitation showed quasi-biweekly oscillation characteristics.The so-called“subtropical high–precipitation–anticyclone”(SHPA)feedback mechanism blocked the circulation systems in the mid-to-low latitudes and provided a continuous supply of water vapor for precipitation.As for the effect of sea surface temperature,the western North Pacific anomalous anticyclone stimulated by El Niño strengthened the intensity of the southerly wind and provided support for the redevelopment of the anticyclone system in the SHPA feedback mechanism.The sea surface temperature anomaly in the South China Sea provided sensible heating for precipitation,and convergent rising airflow was conducive to the occurrence of precipitation.Additionally,the SHPA mechanism provides a reliable basis for the prediction of persistent precipitation in winter in the mid-to-low latitudes.

关键词： persistent precipitation feedback mechanism latent heat

Combined garnet,scheelite and apatite U-Pb dating of mineralizing events in the Qiaomaishan Cu-W skarn deposit,eastern China

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Geoscience Frontiers 2023年第1期14卷 17-32页

作者： Yue Li Feng Yuan Simon M.Jowitt Xiangling Li Taofa Zhou fangyue wang Yufeng Deng Ore Deposit and Exploration Centre(ODEC) Hefei University of TechnologyHefei 23009China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei 23009China Department of Geoscience University of Nevada Las Vegas4505 S.Maryland Pkwy.NV 89154-4010USA

Determining the precise timing of mineralization and mineralizing events is crucial to understanding regional mineralizing and other geological events and processes.However,there are a number of mineralogical and analytical limitations to the approaches developed for the absolute dating of mineralizing systems,such as molybdenite Re-Os and zircon and garnet U-Pb,among others.This means that the precise and accurate dating of mineralizing systems that may not contain minerals suitable for dating using existing approaches requires the development of new(and ideally in situ)approaches to absolute dating.This study outlines a new in situ analytical approach that has the potential to rapidly and accurately evaluate the timing of ore formation.Our study employs a novel application of in situ scheelite U-Pb dating analysis using laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)and samples from the Qiaomaishan deposit,a representative example of skarn mineralization within the Xuancheng ore district of eastern China.Our approach to scheelite dating of the deposit is verified by cross-comparison to dating of cogenetic garnet and apatite,proving the effectiveness of this approach.Our new approach to dating of scheelite-bearing geological systems is rapid,cheap,requires little sample preparation,and is undertaken in situ,allowing crucial geological and mineralogical context to be retained during analysis.The approaches outlined here not only allow the determination of the absolute timing of formation of the Qiaomaishan deposit through the U-Pb dating of scheelite[138.6±3.2 Ma,N=39,mean square weighted deviation(MSWD)=1.17],garnet(138.4±1.0 Ma,N=40,MSWD=1.3),and apatite(139.6+3.3 Ma,N=35,MSWD=0.72),but also further supports the theoretical genetic links between this mineralization and the emplacement of a proximal porphyritic granodiorite intrusion(zircon U-Pb age:139.5±1.2 Ma,N=23,MSWD=0.3).Moreover,our research indicates that the higher the concentrations of U within scheelite,the more suitable that sc

关键词： In-situ scheelite U-Pb dating In-situ garnet U-Pb dating In-situ apatite U-Pb dating Qiaomaishan skarn deposit

Molybdenite Re-Os,titanite and garnet U-Pb dating of the Magushan skarn Cu-Mo deposit,Xuancheng district,Middle-Lower Yangtze River Metallogenic Belt

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Geoscience Frontiers 2021年第3期12卷 399-415页

作者： Yue Li Feng Yuan Simon M.Jowitt fangyue wang Xiangling Li Yufeng Deng Yunyue wang Taofa Zhou School of Resources and Environmental Engineering Hefei University of TechnologyHefei 23009China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei University of TechnologyHefei 23009China Department of Geoscience University of Nevada Las Vegas4505 S.Maryland Pkwy.NV 89154-4010USA

The Magushan skarn Cu-Mo deposit is a representative example of the skarn mineralization occurring within the Xuancheng ore district of the Middle-Lower Yangtze River Metallogenic Belt of eastern China.The precise age of an ore deposit is important for understanding the timing of mineralization relative to other geological events in a region and to fully place the formation of a mineral deposit within the geological context of other processes that occur within the study area.Here,we present new molybdenite Re-Os and titanite and andradite garnet U-Pb ages for the Magushan deposit and use these data to outline possible approaches for identifying genetic relationships in geologically complex areas.The spatial and paragenetic relationships between the intrusions,alteration,and mineralization within the study area indicates that the formation of the Magushan deposit is genetically associated with the porphyritic granodiorite.However,this is not always the case,as some areas contain complexly zoned plutons with multiple phases of intrusion or mineralization may be distal from or may not have any clear spatial relationship to a pluton.This means that it may not be possible to determine whether the mineralization formed as a result of single or multiple magmatic/hydrothermal events.As such,the approaches presented in this study provide an approach that allows the identification of any geochronological relationships between mineralization and intrusive events in areas more complex than the study area.Previously published zircon U-Pb data for the mineralization-related porphyritic granodiorite in this area yielded an age of 134.2±1.2 Ma(MSWD=1.4)whereas the Re-Os dating of molybdenite from the study area yielded an isochron age of 137.7±2.5 Ma(MSWD=0.43).The timing of the mineralizing event in the study area was further examined by the dating of magmatic accessory titanite and skarn-related andradite garnet,yielding U-Pb ages of 136.3±2.5 Ma(MSWD=3.2)and 135.9±2.7 Ma(MSWD=2.5),respectively.The dating of magmatic and hydro

关键词： Magushan skarn deposit Molybdenite Re-Os dating Titanite U-Pb dating Garnet U-Pb dating Xuancheng ore district Middle-Lower Yangtze River Metallogenic Belt