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Comparison between Paleozoic and CenozoicLithospheric Mantle in Eastern Part of North china Block: With a Discussion of Mantle Evolution

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Journal of Earth Science 1999年第3期18卷 207-214页

作者： Zheng Jianping Lu Fengxiang(faculty of Earth sciences, china university of geosciences, wuhan 43.074,{4.)O’Reilly S. Y. Griffin W. L. Zhang Ming(GEMOC, faculty of Earth sciences, Macquarie university, Sydney, NSW2113, Australia) faculty of Earth sciences China University of Geosciences Wuhan 430074 China GEMOC Faculty of Earth Sciences Macquarie University Sydney NSW2113 Australia

Paleozoic diamond- and xenolith-bearing kimberlites and Cenozoic xenolith-bearing basalts,erupted in the eastern part of the North china block (NCB), provide excellent mantle probes for the research of intra-plate processes and the Phanerozoic evolution of the subcontinental lithosphere mantle (SCLM ). In this study, the mineral inclusions in diamond and xenoliths from Mengyin (Shandong Province) and Fuxian (Liaoning Province) kimberlites were chosen for constraining the nature of the Paleozoic SCLM. while xenoliths from the Shanwang and Qixia basalt (both in Shandong Province) were chosen for constraining the nature of the Cenozoic *** lies astride the Tancheng-Lujiang (Taulu) fault zone, a major lithospheric fault in Eastern china as well as in Eastern Asia, and Qixia lies east of the rault zone. Based on the research of the petrography of mantle xenoliths, petrochemistry, major and the trace element of mantle minerals, lithospheric thermal state, combiued with tbe modern geophysical data, it is concluded that the attenuation and replacement of Paleozoic SCLM by upwelling asthenospheric materials through thermal erosion and possibly delamination resulted in the rormation of irregular-shaPed hot bodies, mainly along weak zones within the mantle- The Tanlu fault zone played an importont role in the Mesozoic-Cenozoic replacemeni or the pre-existing lithospheric mantle.

关键词： asthenospheric material paleo-lithosphere replacement and attenuation thermal erosion mantle weak zone Tancheng-Lujiang fault zone Eastern china

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Influence of MnO_2 on the photocatalytic activity of P-25 TiO_2 in the degradation of methyl orange

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中国科学：化学英文版 2008年第2期51卷 179-185页

作者： LI ShunJun1, MA ZiChuan1,2, WANG Lin1 & LIU JingZe2 1 College of Chemistry and material sciences, Hebei Normal university, Shijiazhuang 050016, china 2 College of Life Science, Hebei Normal university, Shijiazhuang 050016, china College of Chemistry and material sciences Hebei Normal University Shijiazhuang China College of Life Science Hebei Normal University Shijiazhuang China

Influences of α-MnO2, β-MnO2, and δ-MnO2 on the photocatalytic activity of Degussa P-25 TiO2 have been investigated through the photocatalytic degradation of methyl orange. The TiO2 photocatalyst, before and after being contaminated by MnO2, was characterized by UV-visible diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS). The results showed that photocatalytic activity of TiO2 could be inhibited significantly or completely deactivated due to the presence of even a small amount of MnO2 particles. It was found that the poisoning effect varied with the crystal phases of MnO2 and the effect was in the order δ-MnO2 >α-MnO2 >β-MnO2. The poisoning effect was attributed to the formation of heterojunctions between MnO2 and TiO2 particles. The heterojunctions changed the chemical state of Ti4. and O2 sites in the crystalline phase of TiO2. MnO2 in contact with TiO2 particles also broadens the band-gap of TiO2, which decreases UV absorption of TiO2. It can also create some deep impurity energy levels serving as photoelec-tron-photohole recombination center, which accelerates the electron-hole recombination.

关键词： TiO2 MnO2 deactivation photocatalysis methyl orange

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土壤、沉积物系列标准物质中38种元素的ICP-MS定值

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分析测试学报 2002年第5期21卷 9-12页

作者：王荔杨雁泽林守麟胡圣虹中国地质大学材料与化学工程学院湖北武汉430074 中国地质大学地球科学学院湖北武汉430074

探讨了电感耦合等离子体质谱测定土壤元素的基体效应及元素间的基体干扰 ,采用模拟土壤元素天然组成比值的校正溶液 ,利用 115In-103Rh双内标校正系统有效地抑制了分析信号的动态漂移 ,建立了测定土壤中元素的ICP_MS方法 ;对GBW074.0～0... 详细信息

探讨了电感耦合等离子体质谱测定土壤元素的基体效应及元素间的基体干扰 ,采用模拟土壤元素天然组成比值的校正溶液 ,利用 115In-103Rh双内标校正系统有效地抑制了分析信号的动态漂移 ,建立了测定土壤中元素的ICP_MS方法 ;对GBW074.0～074.6土壤、沉积物系列标准物质进行定值 ,测定结果与XRF分析结果比较 ,同时用于GBW074.4.GBW074.5、GBW074.8、GBW07309管理样分析。

关键词：标准物质元素 ICP-MS 定值等离子体质谱标准物质土壤沉积物校正分析

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Preparation and Kinetics of the Thermal Decomposition of Nanosized CuC_2O_4.ZnC_2O_4.2H_2O

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wuhan university Journal of Natural sciences 2006年第3期11卷 667-671页

作者： CHEN Donghua HUANG Lianrong TANG Wanjun Hubei Key Laboratory for Catalysis and material Science/College of chemical and Materal Science South-Central University for Nationalities Wuhan 430074 Hubei China

The physical mixture of nanosized CuC2O4.ZnC2O4.2H2O, as precursors of CuO-ZnO, have been prepared by the one-step solid state reaction method at room temperature. The thermal decomposition processes taking place in the solid state oxalate mixture of nanometer CuC2O4.ZnC2O4.2H2O have been studied in static air using TG, DSC, XRD and TEM techniques. TEM showed that the grain size of the decomposition product is 5-15 nm. The values of the activation energy Eα were determined using the isoconversional procedure of KAS method and the Ozawa method. The most possible mechanism function f（α） of the thermal decompositions of nanosized CuC2O4.ZnC2O4.2H2O are defined using the comparative method, function models of tbe decomposition of CuC2O4.and ZnC2O4. follow tbe same mechanism function ＂Avrami-Erofeev equalion＂. The pre-exponential factor A is obtained on the basis of Eα and f（α）, thus the thermal analysis kinetic triplet of the decompositions of nanosized CuC2O4.ZnC2O4.2H2O are determined.

关键词： nanoparticle copper oxalate zinc oxalate kinetics characterization

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Geochemistry and U-Pb zircon geochronology of Late-Mesozoic lavas from Xishan, Beijing

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Science china Earth sciences 2006年第1期 50-67页

作者： YUAN Honglin1, LIU Xiaoming1, LIU Yongsheng2, GAO Shan1,2 & LING Wenli2 1. Key Laboratory of Continental Dynamics, Northwest university, Xi’an 710069, china 2. faculty of Earth sciences,{4., wuhan 43.074, china

Zircon U-Pb dating by both SHRIMP and LA-ICP-MS and geochemical study of the Tiaojishan Formation and the Donglintai Formation from Xishan, Beijing, reveal that ages of upper lavas of Tiaojishan Formation and Middle of Donglintai Formation are 137.1±4.5 Ma(2σ ) and 130-134.Ma, respectively. The fomer is slightly older than the latter and the age difference between these two formations is less than 5 Ma. These lines of evidence prove that the two volcanoes erupted within a short time. The age of the Tiaojishan Formation from Xishan, Beijing is distinctively different from that of the Chende Basin. This indicated that the ages of Tiaojishan lavas varied in different regions. The Tiaojishan Formation consists of typical adakite (SiO2=56%, Na2O = 3.99-6.17, Na2O/K2O = 2.2-3.1, Sr = 680-1074.10?6, Y = 13.2-16.3×10?6, Yb = 1.13-1.52×10?6, Sr/Y = 4.-66), high-Mg adakite and high-Mg andesite (Mg# = 54.55). Features of continental crust of adakite from the Tiao-jishan Formation and its syngeneric middle silicic vocanic rocks, such as typical Nd-Ta negative ab-normality and Pb possive abnormality, indicate that these lavas are originated from partial melts of continental crust. These results suggest that the adakite from the Tiaojishan Formation of Xishan, Beijing derived from thickened eclogitic lower crust and lithosphere beneath the North china craton at mesozoic that was foundered into the aesthenosphere, and subsequenctly partially melted and in-teracted with mantle olivine during melts upward migration. The age of lavas from the Tiaojishan Formation restrained the foundation which should last at least until 137 Ma. Lavas of the Donglintai Formation are rhyolith and andesite with normal Mg# and thus they did not interact with the mantle. These lavas represent remobilized melts of lower crust material caused by mantle aesthenosphere upwelling migration induced by foundation.

关键词： adakite eclogite geochemistry North china craton lower crust foundation.

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Fuzzy cluster analysis of the provenance of ancient Yaozhou porcelain body

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Chinese Science Bulletin 2003年第1期48卷 27-30页

作者： LI Guoxia1, ZHAO Weijuan1, LI Rongwu2, XIE Jianzhong1, FENG Songlin3, FAN Dongyu3, ZHANG Ying3, CAI Zhifang3, ZHUO Zhenxi4.& GAO Zhengyao1 1. faculty of Physical engineering, Zhengzhou university, Zhengzhou 4.0052, china 2. Department of Physics, Beijing Normal university, Beijing 100875, china 3. High Energy Physics Institute, the Chinese Academy of sciences, Beijing 100080, china 4. Archaeology Research Institute, Shanxi Province, Xian 710000, china Correspondence should be addressed to Li Guoxia (e-mail: Liguoxia@ ***) faculty of Physical engineering Zhengzhou University Zhengzhou 450052 China Department of Physics Beijing Normal University Beijing 100875 China High Energy Physics Institute Chinese Academy of Sciences Beijing 100080 China Archaeology Research Institute Shanxi Province Xi'an 710000 China

The technique of neutron activation analysis (NAA) has been employed to measure the content of 29 kinds of elements in the sample of Yaozhou porcelain bodies. Then a fuzzy cluster analysis has been conducted to the NAA data and a diagram of the dynamic fuzzy cluster analysis has been achieved. The results indicate that the batch of ancient Yaozhou porcelain bodies, which were of different overglaze color and were produced by different kilns during a period of over 800 years from the Tang Dynasty (618—907 A.D.) to the Yuan Dynasty (1271—1368 A.D.), has shared a stable and concentrated raw material source. Provenances of por-celain bodies from different times, though having their spe-cific independence, enjoy a close relationship and are not far from one another. Provenances of porcelain bodies made during the Tang Dynasty and the Five Dynasties (907—960 A.D.) are found to be closer to one another, while those of the Song (960—1279 A.D.) and the Jin Dynasty (1115—1234.A.D.) are comparatively concentrated in certain areas and are dif-ferent from those of the Tang Dynasty. Both the tri-colored glazed pottery made in Yaozhou kilns during the Tang Dy-nasty and the Yaozhou porcelain bodies of the Tang period are from the same provenance.

关键词：古代姚州瓷胎窑址粘土矿原料来源中子活化分布模糊聚类分析

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Compositions of heavy minerals in Northeastern china sandlands and provenance analysis

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Science china Earth sciences 2007年第11期50卷 1715-1723页

作者： XIE Jing1,2 & DING ZhongLi1 1 Institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, china 2 Graduate university of Chinese Academy of sciences, Beijing 10004., china Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China Graduate university of Chinese Academy of sciences Beijing China

Sand samples deposited since the Last Glacial Maximum (LGM) from the Hulun Buir, Horqin and Otin-dag sandlands were measured for their assemblages of heavy minerals and chemical compositions of detrital garnets and tourmalines. Heavy mineral assemblages of these three sandlands consist mainly of garnet, ilmenite, epidote and minor amphibole and magnetite. Garnets consist mainly of high Mg type-A ones (58% on average), and minor type-B ones. Toumalines are mainly composed of Mg-rich and minor Fe-rich ones. Compared with those of central-southern Mongolia and central Tarim, these three sandlands are derived from the Phanerozoic rocks of the Central Asian Orogenic Belt and the Archean and Paleoprotorozoic basement rocks of the North china Craton. Our results provide direct evidence that the present-day sands may be reworked from LGM ones. Differences of heavy mineral composi-tions occur between the samples of the three sandlands and Taklimakan Desert, indicating that the material of the western arid regions contributes little to the eastern sandlands.

关键词： heavy minerals,provenance,Northeastern china,garnet,tourmaline

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Reverse extraction of early-age hydration kinetic equation from observed data of Portland cement

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Science china(Technological sciences) 2010年第6期53卷 1540-1553页

作者： WANG Lin1,YANG Bo2,ZHAO XiuYang1,2,CHEN YueHui2 & CHANG Jun3 1 School of Computer Science and Technology,Shandong university,Jinan 250101,china 2 Provincial Key Laboratory for Network-based Intelligent Computing,university of Jinan,Jinan 250022,china 3 School of {4. Science and engineering,university of Jinan,Jinan 250022,china School of Computer Science and Technology Shandong University Jinan China Provincial Key Laboratory for Network-based Intelligent Computing University of Jinan Jinan China School of material Science and engineering University of Jinan Jinan China

The early-age hydration of Portland cement paste has an important impact on the formation of microstructure and development of ***,manual derivation of hydration kinetic equation is very difficult because there are multi-phased,multi-sized and interrelated complex chemical and physical reactions during cement *** this paper,early-age hydration kinetic equation is reversely extracted automatically from the observed time series of hydration degree of Portland cement using evolutionary computation method that combines gene expression programming and particle swarm optimization *** order to reduce the computing time,GPUs are used for acceleration in *** have shown that according to the extracted kinetic equation,simulation curve of early-age hydration is in good accordance with the observed experimental ***,this equation still has a good generalization ability even changing chemical composition,particle size and curing conditions.

关键词： Portland cement hydration kinetic equation reverse extraction gene expression programming particle swarm optimization

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Preparation of nanocrystalline BaTiO_3 ceramics

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Science china(Technological sciences) 2009年第6期52卷 1730-1734页

作者： DENG XiangYun1,2,LI DeJun1,LI JianBao2,WANG XiaoHui3 & LI LongTu3 1 College of Physics and Electronic Information,Tianjin Normal university,Tianjin 300387,china 2 materials and chemical {4. Institute,Key Laboratory for Hainan Advantage Resources and Applied Technology in chemical {4. material of Ministry of Education,Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti,Hainan university,Haikou 570228,china 3 Department of materials Science and {4.,Tsinghua university,Beijing 100084.china College of Physics and Electronic Information Tianjin Normal University Tianjin China materials and chemical engineering Institute Key Laboratory for Hainan Advantage Resources and Applied Technology in Chemical Engineering Material of Ministry of Education Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Hainan University Haikou China Department of materials Science and engineering Tsinghua University Beijing China

The high-dense nanocrystalline BaTiO3(BT)ceramics with grain size smaller than 100nm have been successfully prepared by the two step sintering and the spark plasma sintering(SPS)*** successive transitions in nanograin BT ceramics from rhombohedral to orthorhombic,tetragonal and cubic transitions,similar to those in coarse BT ceramics,were revealed by in-situ temperature dependent Raman *** multiphase coexistence and the diffused phase transition character were demonstrated in the 8nm nanocrystalline BT ceramics.

关键词： nanocrystalline BaTiO3 ceramics preparation microstructure size effect

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茶叶样品中绿原酸含量的高效液相色谱法测定

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分析测试学报 2001年第1期20卷 76-78页

作者：王丽帅琴汤志勇金泽祥中国地质大学材料科学与化学工程学院湖北武汉430074

建立了茶叶中绿原酸含量测定的反相高效液相色谱法。采用PecosphereC18 柱 ,以甲醇 -水(体积比18∶20,水中含 φ=1/61的甲酸)淋洗 ,用紫外检测器于326nm处测定 ,各组分的色谱峰达到基线分离。绿原酸在0.02～4.02μg范围内线性关系良好 ... 详细信息

建立了茶叶中绿原酸含量测定的反相高效液相色谱法。采用PecosphereC18 柱 ,以甲醇 -水(体积比18∶20,水中含 φ=1/61的甲酸)淋洗 ,用紫外检测器于326nm处测定 ,各组分的色谱峰达到基线分离。绿原酸在0.02～4.02μg范围内线性关系良好 ,线性相关系数r=0.9996。在安徽黄山产贡菊和安徽产金银花中加标的回收率分别为86.8 %、102.0% ,该法已用于十多种茶叶实际样品的测定。

关键词：茶叶绿原酸高效液相色谱法含量测定

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