检索结果-南通市图书馆

辽宁阜新排山楼金矿区岩浆岩锆石SHRImP定年及其意义

在线全文

学校读者我要写书评

暂无评论

地球化学 2001年第5期30卷 483-490页

作者：罗镇宽苗来成关康裘有守 y.m.qiu N.J.mcNaughton D.I.Groves 天津地质研究院中国科学院地质与地球物理研究所北京100029 Centre for Strategic mineral Deposits Department of Geology amd Geophysicsthe University of Western Australia

采用先进的SHRImP定年技术对辽宁阜新排山楼金矿区成矿前变形的闪长玢岩脉、变形花岗斑岩脉、成矿后的闪长玢岩脉和大石头沟黑云母花岗岩的锆石进行了U-Pb年龄测定,获成矿前变形闪长玢岩脉的206Pb/238Pb年龄为(126±2)ma;变形花岗斑岩脉... 详细信息

采用先进的SHRImP定年技术对辽宁阜新排山楼金矿区成矿前变形的闪长玢岩脉、变形花岗斑岩脉、成矿后的闪长玢岩脉和大石头沟黑云母花岗岩的锆石进行了U-Pb年龄测定,获成矿前变形闪长玢岩脉的206Pb/238Pb年龄为(126±2)ma;变形花岗斑岩脉为(124±1)ma;成矿后的闪长玢岩脉为(125±1)ma;大石头沟黑云母花岗岩为(124±1)ma。这4类岩浆岩的年龄在误差允许范围内可基本视为同时代的。这一结果揭示,排山楼韧性剪切带型金矿床是中生代燕山晚期形成的,这与前人采用Ar-Ar法测得矿石蚀变黑云母的年龄犤(124.4±0.391)ma犦是一致的。这表明,在中国东部,许多产在前寒武系岩层中、受韧性剪切带控制的金矿床形成时代是中生代燕山晚期。广泛产在胶东、辽西北票—蒙东赤峰、河北张家口和内蒙古乌拉山等地区的金矿床都主要是中生代燕山晚期形成的,表明燕山晚期是中国东部最重要的金矿化期。

关键词： SHRImP定年岩浆岩金矿床燕山期辽宁形成时代韧性剪切带中生代

冀东都山花岗岩基及相关花岗斑岩脉SHRImP锆石U-Pb法定年及其意义

在线全文

学校读者我要写书评

暂无评论

地球化学 2003年第2期32卷 173-180页

作者：罗镇宽苗来成关康裘有守 y.m.qiu N.J.mcNaughton D.I.Groves 天津地质研究院天津300061 中国科学院地质与地球物理研究所北京100029 CentreforStrategicmineralDeposits

都山花岗岩体是冀东地区最大的花岗岩基,在其周边产有众多与其有关的“卫星”岩体和岩脉。采用先进的SHRImP定年方法,测得都山花岗岩基的206Pb/238U年龄为(223±2)ma,其东侧三家金矿区成矿前花岗斑岩脉的年龄为(222±4)ma,二者在误差范... 详细信息

都山花岗岩体是冀东地区最大的花岗岩基,在其周边产有众多与其有关的“卫星”岩体和岩脉。采用先进的SHRImP定年方法,测得都山花岗岩基的206Pb/238U年龄为(223±2)ma,其东侧三家金矿区成矿前花岗斑岩脉的年龄为(222±4)ma,二者在误差范围内一致,花岗岩基和花岗斑岩脉可视为同一次岩浆活动的产物。这种晚古生代末—早中生代印支期的花岗岩在华北克拉通北缘广泛分布,显示它是一次重要的构造-岩浆事件的产物。根据岩石化学和微量元素特征及有关判别图,都山等印支期花岗岩可能属中朝板块与西伯利亚板块碰撞造山作用的后碰撞花岗岩。花岗斑岩脉中发现有新太古代的继承锆石,表明花岗斑岩的部分源岩为区内新太古代八道河岩群变质岩。都山花岗岩与花岗斑岩脉同时、同源,推测其源岩也有部分为新太古代结晶基底的变质岩。花岗岩与区内金矿化有较大的时差,两者不存在直接的成因联系,仅表明成矿晚于早中生代印支期。

关键词：花岗岩基花岗斑岩脉 SHRImP定年河北锆石岩浆活动

冀东金厂峪金矿区钠长岩脉及青山口花岗岩体SHRImP锆石U-Pb定年及其意义

在线全文

学校读者我要写书评

暂无评论

地质找矿论丛 2001年第4期16卷 226-231页

作者：罗镇宽关康裘有守苗来成 y.m.qiu N.J.mcNaughton D.I.Groves 天津地质研究院天津300061 中国科学院地质和地球物理研究所 Centre for Strategic mineral Deposits Department of Geology amd Geophysicsthe University of Western Australia

金厂峪金矿床是冀东最大的金矿床 ,具有早期复脉型和晚期石英大脉型两种矿石类型。矿区产有多期钠长岩脉 ,且与含金矿脉有密切的时间和空间关系。青山口花岗岩体位于矿区西约 2～ 3km,有研究者认为金矿床成因上与花岗岩体有关。应用先进... 详细信息

金厂峪金矿床是冀东最大的金矿床 ,具有早期复脉型和晚期石英大脉型两种矿石类型。矿区产有多期钠长岩脉 ,且与含金矿脉有密切的时间和空间关系。青山口花岗岩体位于矿区西约 2～ 3km,有研究者认为金矿床成因上与花岗岩体有关。应用先进的 SHRImP测年技术 ,测得肉红色钠长岩脉的锆石 w (2 0 7Pb) / w (2 0 6Pb)年龄为 (185 8± 8) ma,青山口花岗岩体锆石 w(2 0 6Pb) / w(2 3 8U )年龄为 (199± 2 ) ma。金厂峪金矿床的的复脉型矿化早于肉红色钠长岩脉 ,故其矿化的时代应在晚元古代。青山口岩体的年龄和区域上与辉钼矿化有关的花岗岩年龄一致 ,均为燕山早期。推测金厂峪金矿床晚期石英大脉型矿化中的辉钼矿化可能与青山口花岗岩体有关。

关键词： SHRImP测年花岗岩金矿床河北锆石中生代矿化时代

冀东峪耳崖和牛心山花岗岩体SHRImP锆石U-Pb定年及其意义

在线全文

学校读者我要写书评

暂无评论

矿物岩石地球化学通报 2001年第4期20卷 278-285页

作者：罗镇宽裘有守关康苗来成 y.m.qiu N.J.mcNaughton D.I.Groves 天津地质研究院天津300061 中国科学院地质和地球物理研究所北京100029 Centre for Strategic mineral Deposits

侵入冀东马兰峪复背斜的前寒武岩层中的花岗岩体与区内金矿床有密切的空间关系 ,但成岩时代有争议 ,与金矿床的成因关系不明。本文采用SHRImP定年方法对含有金矿床的峪耳岩和牛心山岩体进行了锆石U Pb年龄测定 ,获峪耳崖岩体灰白色花岗... 详细信息

侵入冀东马兰峪复背斜的前寒武岩层中的花岗岩体与区内金矿床有密切的空间关系 ,但成岩时代有争议 ,与金矿床的成因关系不明。本文采用SHRImP定年方法对含有金矿床的峪耳岩和牛心山岩体进行了锆石U Pb年龄测定 ,获峪耳崖岩体灰白色花岗岩的2 0 6Pb 2 3 8U年龄 175± 1ma ,肉红色花岗岩的年龄为 174± 3ma ;牛心山花岗岩的年龄为 172± 2ma。这 3个年龄在误差范围内可看成是同时代的产物 ,属中生代燕山期。这组年龄限定了金矿化年龄的下限 ,表明金矿化发生在中生代燕山中期后 ,但并不能精确厘定金矿化的年龄 ,因为花岗岩侵入后 ,金矿化之前 ,还有脉岩侵入 ,金矿化与花岗岩本身并无直接的成因关系。

关键词：锆石 SHRImP定年锆石U-Pb年龄峪耳崖花岗岩体牛心山花岗岩体冀东

辽宁凌源柏杖子金矿区花岗岩SHRImP锆石U-Pb年龄

在线全文

学校读者我要写书评

暂无评论

地质调查与研究 2004年第2期27卷 82-85,128页

作者：罗镇宽李俊建关康裘有守 y.m.qiu N.J.mcNaughton D.I.Groves 天津地质研究院天津地质矿产研究所天津300170 Centre for Strategic mineral Deposits Department of Geology amd Geophysics the University of Western Australia

采用SHRImP测年方法测得柏杖子金矿区含矿花岗岩的锆石U-Pb年龄为(222±3)ma,与区内都山花岗岩基和三家子金矿区花岗斑岩的年龄一致,属中生代印支期后碰撞花岗岩。该年龄限定了金矿化年龄的下限,即金矿化不可能早于印支期,但并不能确定... 详细信息

采用SHRImP测年方法测得柏杖子金矿区含矿花岗岩的锆石U-Pb年龄为(222±3)ma,与区内都山花岗岩基和三家子金矿区花岗斑岩的年龄一致,属中生代印支期后碰撞花岗岩。该年龄限定了金矿化年龄的下限,即金矿化不可能早于印支期,但并不能确定金矿化的精确年龄。根据金矿脉与后期岩脉伴生的特征,矿化可能发生在中生代燕山期。

关键词：柏杖子金矿花岗岩 SHRImP年龄辽宁凌源

Ozonolysis of ketoprofen in polluted water:Reaction pathways,kinetics,removal efficiency,and health effects

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 451-461页

作者： Qiong mei Zhaoxu qiu Jinchan Jiang mingxue Li Qizhao Wang maoxia He School of Land Engineering Shaanxi Key Laboratory of Land ConsolidationChang’an UniversityXi’an 710064China School of Water and Environment Chang’an UniversityXi’an 710054China Environment Research Institute Shandong UniversityQingdao 266237China Weihai Water Conservancy Service Center Weihai 264200China

Ketoprofen(KET),as a non-steroidal anti-inflammatory drug frequently detected in aqueous environments,is a threat to human health due to its accumulation and low biodegradability,which requires the transformation and degradation of KET in aqueous *** this paper,the reaction process of ozone-initiated KET degradation in water was investigated using density functional theory(DFT)method at the m06-2X/6-311++g(3df,2p)//m06-2X/6-31+g(d,p)*** detailed reaction path of KET ozonation is *** thermodynamic results show that ozone-initiated KET degradation is *** ultraviolet irradiation,the reaction of ozone with water can also produce OH radicals(HO·)that can react with *** degradation reaction of KET caused by HO·was further *** kinetic calculation illustrates that the reaction rate(1.99×10-1(mol/L)^(-1)sec^(-1))of KET ozonation is relatively slow,but the reaction rate of HO·reaction is relatively high,which can further improve the degradation *** this basis,the effects of pollutant concentration,ozone concentration,natural organic matter,and pH value on degradation efficiency under UV/O3 process were *** ozonolysis reaction of KET is not sensitive to pH and is basically ***,the toxicity prediction of oxidation compounds produced by degradation reaction indicates that most of the degradation products are harmless,and a few products containing benzene rings are still toxic and have to be *** study serves as a theoretical basis for analyzing the migration and transformation process of anti-inflammatory compounds in the water environment.

关键词： Ozonolysis,Ketoprofen Degradation mechanisms OH radicals Aquatic toxicity Degradation efficiency

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： yi Qi Xueying Chen Bowen Liu Xuliang Lin Xueqing qiu yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006GuangdongChina Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Jieyang 515200GuangdongChina Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of TechnologyGuangzhou 510006GuangdongChina

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo_(2)O_(4)spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo_(2)O_(4)spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

Constructing Pr-doped CoOOH catalytic sites for efficient electrooxidation of 5-hydroxymethylfurfural

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 234-244页

作者： Botao Fan Hao Zhang Bang Gu Feng qiu qiue Cao Wenhao Fang School of Chemical Science and Technology Yunnan UniversityKunming 650091YunnanChina National Center for International Research on Photoelectric and Energy materials School of Materials and EnergyYunnan UniversityKunming 650091YunnanChina

Electrocatalytic conversion of renewable biomass is emerging as a promising route for sustainable chemical production;hence it urgently calls for developing efficient electrocatalysts with low potentials and high current ***,a Pr-doped Co(OH)_(2)hexagonal sheet(Pr/Co=1/9,in mole)is synthesized by electrodeposition as highly performant catalyst for 5-hydroxymethylfurfural(HmF)oxidation reaction(HmFOR)to produce 2,5-furandicarboxylic acid(FDCA).This novel and low-cost catalyst possesses a rather low onset potential of 1.05 V(***)and requires only 1.10 V(***)to reach a current density of 10 mA cm^(-2)for HmFOR,significantly outperforming Co(OH)_(2)benchmark(i.e.,210 mV higher to reach10 m A cm^(-2)).The origin of Pr promotion effect as well as the evolution of CoOOH catalytic sites and HmFOR process has been deeply elucidated by physical characterizations,kinetic experiments,in situ electrochemical techniques,and theoretical *** unique Pr-ameliorated CoOOH active centers enable 100%conversion of HmF,99.6%selectivity of FDCA,and 99.7%Faraday efficiency,with a superior cycling durability toward *** can be one of the most outstanding results for Co-based HmFOR catalysts to date in the *** this work can help open up new horizons for constructing novel and efficient Co-based electrocatalysts by the utilization of lanthanide elements.

关键词： Biomass conversion Electrocatalysis 2,5-Furandicarboxylic acid Doped Co catalyst Co3+active sites Charge transfer rate

The interplay between histone modifications and nuclear lamina in genome regulation

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2025年第1期52卷 24-38页

作者： Chang Sun yanjing Zhao Liping Guo Juhui qiu Qin Peng Institute of Systems and Physical Biology Shenzhen Bay LaboratoryShenzhen 518132China Faculty of medicine and Health Sciences Barcelona UniversityBarcelonaSpain Division of Life Science Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina School of Biology and Biological Engineering South China University of TechnologyGuangzhouGuangdong 510006China Key Laboratory for Biorheological Science and Technology of ministry of Education State and Local Joint Engineering Laboratory for Vascular ImplantsCollege of BioengineeringChongqing UniversityChongqing 400030China

Gene expression is regulated by chromatin architecture and epigenetic remodeling in cell homeostasis and *** modifications act as the key factors to modulate the chromatin *** histone modifications are strongly associated with the localization of *** primarily localizes at the nuclear periphery,where it interacts with lamina proteins to suppress gene *** this review,we summarize the potential bridges that have regulatory functions of histone modifications in chromatin organization and transcriptional regulation at the nuclear *** use lamina-associated domains(LADs)as examples to elucidate the biological roles of the interactions between histone modifications and nuclear lamina in cell differentiation and *** the end,we highlight the technologies that are currently used to identify and visualize histone modifications and LADs,which could provide spatiotemporal information for understanding their regulatory functions in gene expression and discovering new targets for diseases.

关键词： Histone modifications Chromatin organization Nuclear lamina Lamina-associated domain Genome regulation Cell differentiation