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New 40Ar/39Ar Data of Gold Mineralization in the Ailaoshan Gold Belt, Yunnan Province, China

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Acta Geologica Sinica(English Edition) 2020年第1期94卷 210-211页

作者： YANG Zongyao hu guyue ZHAO Xiaoyan Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610059China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing China

Objective“Orogenic gold deposits,”which account for 30%of global gold resources(Frimmel and Hennigh,2015),is one of the most important types of gold deposits in the *** kind of gold deposit is supposed to have spatial and temporal distribution association with the accretionary orogenic *** Ailaoshan Gold Belt,where there are many large orogenic gold deposits including Jinchang,Daping,Laowangzhai,Donggualing,and Changan,contribute substantially to Chinese gold *** Himalayan orogen and Ailaoshan Orogen,both have experienced the early accretionary orogenesis and the subsequent collisional orogenesis are one of the biggest orogenic belts on the *** mineralization can be divided into that the earlier Yarlung Zangbo suture zone(59–44 Ma)and the later Ailaoshan Orogen(35–26 Ma)(Li et al.,2017),based on previous geochronological *** order to find out if there are any connections between these two gold events,we present 40Ar/39Ar data of hydrothermal sericite collected from the Xiachahe gold deposit in the northwest of the Ailaoshan Gold ***,our new geochronology data regards this as a continuous gold mineralization event resulting from the India–Eurasia collision.

关键词： Ar Data of Gold Mineralization in the Ailaoshan Gold Belt New Yunnan Province

Miocene Crustal Anatexis of Paleozoic Orthogneiss in the Zhada Area,Western Himalaya

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Acta Geologica Sinica(English Edition) 2022年第3期96卷 954-971页

作者： CHEN Han hu guyue ZENG Lingsen YU Xuhui LI Yike College of Earth Science Chengdu University of TechnologyChengdu 610059China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

Granitic gneiss(orthogneiss)and Himalayan leucogranite are widely distributed in the Himalayan orogen,but whether or not the granitic gneiss made a contribution to the Himalayan leucogranite remains *** this study,we present the petrological,geochronological and geochemical results for orthogneisses and leucogranites from the Zhada area,Western *** orthogneiss is composed mainly of quartz,plagioclase,K-feldspar,biotite and muscovite,with accessory zircon and *** zircon cathodoluminescence(CL)images show that most grains contain a core with oscillatory zoning,which indicates an igneous *** high-resolution ion microprobe(SHRIMP)U-Pb dating of the zircon cores in the orthogneiss shows a weighted ^(206)Pb/^(238)U age of 515±4 Ma(early Paleozoic),with sponge-like zircon rims of 17.9±0.5 Ma(Miocene).Zhada leucogranite shows^(206)Pb/^(238)U ages ranging from 19.0±0.4 Ma to 12.4±0.2 Ma,the weighted average age being 16.2±0.4 *** leucogranites have a low Ca content(<1 wt%),FeOt content(<1 wt%),Rb content(67.0-402 ppm),Sr content(<56.6 ppm),Ba content(3.35-238 ppm)and Rb/Sr ratio(0.5-14.7),which are similar to the geochemical characteristics of the Himalayan leucogranite derived from muscovite dehydration partial melting of metasediments and representative of most Himalayan *** highly variable Na_(2)O+K_(2)O(4.33 wt%-9.13 wt%),Al_(2)O_(3)(8.44 wt%-13.51 wt%),ΣREE(40.2-191.0 ppm),Rb(67.0-402 ppm)and Nb(8.23-26.4 ppm)contents,^(87)Sr/^(86)Sr(t)ratios(0.7445-0.8605)andεNd(t)values(−3.6 to−8.2)indicate that the leucogranite is derived from a heterogenetic *** nonradiogenic Nd isotope values of the studied Zhada leucogranite and orthogneiss range from−8.2 to−3.6 and from−8.7 to−4.1,***,the general mixing equation was used to perform the Sr and Nd isotope mixing *** results indicate that the heterogenetic source was the Tethyan Himalayan Sequence(THS)/Higher Himalayan Crystalline

关键词： leucogranite orthogneiss petrogenesis crustal anatexis Zhada area Himalayan orogen

Geochemical and Boron Isotopic Evidence that Tourmaline Records Country Rock Assimilation of Leucogranites in the Himalayan Orogen

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Acta Geologica Sinica(English Edition) 2022年第1期96卷 123-134页

作者： hu guyue GAO Li’e ZENG Lingsen LI Yike MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China MNR Key Laboratory of Deep-Earth Dynamics Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China

Tourmaline geochemical and boron(B)isotopic compositions in two-mica granites(TMG),tourmaline-bearing leucogranites(Tou-LG),tourmalites and metapelites from the Gyirong-Malashan areas of the Himalayan orogen provide evidence for country rock assimilation during the intrusion of Himalayan *** schorls in Gyirong leucogranitic plutons show low contents of MgO(0.238%-1.160%)and δ^(11)B values(-12.1‰--11.2‰),while dravites gathered in the contact zone between the leucogranitic veins and metapelites show high contents of MgO(4.815%-6.755%)and δ^(11)B values(-10.7‰--9.3‰).This geochemical and isotopic variation of tourmalines can also be identified in the Malashan gneiss *** a result,three types of tourmaline were identified in the Himalayan orogen:(1)Tou-Ⅰ in the TMG and Tou-LG,which is the most common tourmaline type of schorl;(2)Tou-Ⅱ(dravite and high-Mg schorl)in the Tou-LG and tourmalite at the margins of the leucogranite;and(3)Tou-Ⅲ(mainly dravite,with minor high-Mg schorl)in metapelites of the High Himalayan Crystalline *** lenses and veins of Tou-LG may have experienced metasomatism and assimilation as a result of interaction with the High Himalayan Crystalline Sequence metasedimentary country rocks,which can be traced by the geochemical and isotopic characteristics of the tourmaline therein.

关键词： boron isotope tourmaline granite country rock assimilation Himalayan orogen

Multi-modal anti-counterfeiting and encryption enabled through silicon-based materials featuring pH-responsive fluorescence and room-temperature phosphorescence

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Nano Research 2020年第6期13卷 1614-1619页

作者： Jinhua Wang Bin Song Jiali Tang guyue hu Jingyang Wang Mingyue Cui Yao He Laboratory of Nanoscale Biochemical Analysis Institute of Functional Nano and Soft Materials(FUNSOM)and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou215123China

Nano Research volume 13,pages1614–1619(2020)Cite this article 236 Accesses Metrics details Abstract Optical silicon(Si)-based materials are highly attractive due to their widespread applications ranging from electronics to *** is worth noting that while extensive efforts have been devoted to developing fluorescent Si-based structures,there currently exist no examples of Si-based materials featuring phosphorescence emission,severely limiting Si-based wide-ranging optical *** address this critical issue,we herein introduce a kind of Si-based material,in which metal-organic frameworks(MOFs)are in-situ growing on the surface of Si nanoparticles(SiNPs)assisted by microwave *** particular significance,the resultant materials,i.e.,MOFs-encapsulated SiNPs(MOFs@SiNPs)could exhibit pH-responsive fluorescence,whose maximum emission wavelength is red-shifted from 442 to 592 nm when the pH increases from 2 to *** importantly,distinct room-temperature phosphorescence(maximum emission wavelength:505 nm)could be observed in this system,with long lifetime of 215 *** advantages of above-mentioned unique optical properties,the MOFs@SiNPs are further employed as high-quality anti-counterfeiting inks for advanced *** comparison to conventional fluorescence anti-counterfeiting techniques(static fluorescence outputs are generally used,thus being easily duplicated and leading to counterfeiting risk),pH-responsive fluorescence and room-temperature phosphorescence of the resultant MOFs@SiNPs-based ink could offer advanced multi-modal security,which is therefore capable of realizing higher-level information security against counterfeiting.

关键词： silicon nanohybrids pH-responsive fluorescence room-temperature phosphorescence multi-modal anti-counterfeiting

Image segmentation algorithm for greenhouse cucumber canopy under various natural lighting conditions

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International Journal of Agricultural and Biological Engineering 2016年第3期9卷 130-138页

作者： Sun Guoxiang Li Yongbo Wang Xiaochan hu guyue Wang Xuan Zhang Yu College of Engineering Nanjing Agricultural UniversityNanjing 210095China

In this study,machine vision technology was used to capture images of greenhouse cucumber canopy,and image segmentation was implemented under various natural lighting *** images were enhanced by multi-scale retinex with color restore(MSRCR),and the MSRCR images were segmented by four algorithms:normalized difference index(NDI),excess green(ExG),modified excess green(MExG),and modified excess green minus excess red(MExG-ExR).The results indicated that compared with the original images,under various lighting conditions,the average evaluation indexes of brightness,information entropy,average gradient and mean gray value of the MSRCR images were increased by 38.71%,8.04%,4.54%,and 37.81%,respectively,and only the contrast degree decreased by 12.13%.The MExG-ExR segmentation algorithm was used to segment the MSRCR images(fifty images under various lighting conditions in the test and it performed best among the four segmentation algorithms,average overlap ratios and recognition rates of were 99.28%and 98.91%,respectively,while 38.39%and 37.95%respectively for original *** results indicated that the MExG-ExR segmentation algorithm applied to a MSRCR canopy image produced the most stable results among the four *** using the MSRCR image enhancement algorithm,the interference of lighting on greenhouse cucumber canopy images was reduced and the foundation for achieving accurate segmentation of a canopy region was laid,which is of great significance for greenhouse cucumber phenotypic parameter measurements.

关键词： greenhouse cucumber canopy machine vision image segmentation illumination retinex

Microfluidic-enabled ambient-temperature synthesis of ultrasmall bimetallic nanoparticles

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Nano Research 2022年第1期15卷 248-254页

作者： huayi Shi Bin Song Runzhi Chen Qiang Zhang guyue hu Jing Li Jinhua Wang Xinyu Meng Houyu Wang Yao He Laboratory of Nanoscale Biochemical Analysis Institute of Functional Nano and Soft Materials(FUNSOM)and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China Department of Instrument Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

The production of bimetallic nanoparticles with ultrasmall sizes is the constant pursuit in chemistry and materials science because of their promising applications in catalysis,electronics and *** we report ambient-temperature preparation of bimetallic NPs with tunable size and composition using microfluidic-controlled co-reduction of two metal precursors on silicon *** of free diffusion of metal ions in bulk system,microfluidic flow could well control the local ions concentration,thus leading to homogenous and controllable reduction rate among different nucleation *** controlling precursor concentration,flow rate and reaction time,we rationally design a series of bimetallic NPs including Ag-Cu,Ag-Pd,Cu-Pt,Cu-Pd and Pt-Pd NPs with ultrasmall sizes(~3.0 nm),tight size distributions(relative standard deviation(RSD)<21%),clean surface,and homogenous elemental compositions among particles(standard deviation(SD)of weight ratios<3.5%).This approach provides a facile,green and scalable method toward the synthesis of diverse bimetallic NPs with excellent activity.

关键词： bimetallic nanoparticles microfluidics silicon surface co-reduction ultrasmall

There alone the spirit of family endowment problem research

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International English Education Research 2017年第3期 38-40页

作者： hu guyue Shanghai University of Engineering Science ShanghaiChina

Since the 80 s, our country is working on implementing birth limitation and having only one, ＂one of the most glorious＂ policy, the policy is very good solve the problem of China＇s population rising too rapidly, at the same time also the certain negative impact. In other words, lose the sole group production is to limit the second child victims. Of course, only child＇s death is the biggest hidden trouble, this not only can bring economic loss to lose alone group, will give group cause huge loss alone cannot make up for the spiritual loss. If only children died, their relatives and friends, especially the parents very easily into the depression, are not interested in anything, their thoughts are on the verge of collapse, it is also a need to study and to explore the topic.

关键词： two-child policy alone spiritual loss

There alone the spirit of family endowment problem research

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International English Education Research 2016年第4期 58-60页

作者： hu guyue Shanghai University of Engineering Science Security Specialty

关键词： two-child policy alone spiritual loss

Late Ordovician to Early Silurian Tectonic Events in the Himalayan Terrain

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 1049-1050页

作者： GAO Li'e ZENG Lingsen hu guyue WANG Yuhua GAO Jiahao SHANG Zhen WANG Yaying Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China School of Earth and Space Sciences Peking UniversityBeijing 100871China China University of Geosciences Beijing 100083China

ObjectiveThe Himalaya terrain together with the ribbon terrains （e.g., Lhasa, Qiangtang, and Sibumasu blocks） of the Gondwana supercontinent has experienced episodic tectonic events since the Neoproterozoic. However, almost not any documentation with regard to the tectonic processes links the peri-Gondwana subduction between 510-480 Ma with the Carboniferous-Permian （-360-260 Ma） continental rifting event. This possible link is important for testing and formulating the tectonic model for the evolution of the present-day Himalayan orogenic belt, if we consider this belt has also experienced typical Wilson cycle plate tectonics. Recently, we have found several lines of evidence which imply that the Himalayan terrain and possibly other ribbon terrains of the eastern Gondwana have experienced unrecognized tectonic processes during the Late Ordovician to Early Silurian.

关键词： Late Ordovician to Early Silurian Tectonic Events in the Himalayan Terrain ICP