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chinese Science Bulletin 1999年第S2期44卷 166-168页

作者： zhu bingquan, dong yunpeng, {2. xiangyang and ZHANG zhengwei guangzhou institute of geochemistry, chinese academy of sciences, guangzhou 510640, china guangzhou institute of {2. Chinese Academy of Sciences Guangzhou 510640 China

THE parallel strike of geochemical steep zones and geophysical gradient zones represent geochemicalboundaries with tectonic hiding and almost no magmatism, but there existed great variation of lithosphereor crustal thickness. Tectonically, these areas were located in the foreland basins of craton margin. Thesegeochemical boundaries were usually associated with the low-temperature mineralization and petroleumgeneration. The Nd, Sr and Pb isotopic evidence indicated that there still existed strong crustal-mantle interaction through fluid activation along deep-seated faults at the craton margin. Fig. 1 is the 2.7Pb/2.4 Pb-2.8Pb/2.4 Pb diagram, which shows the evident crust-mantle mixing for crude oil, chloroform bitumen-A,

关键词： low temperature mineralization domain geochemical steep zones geophysical gradient zones.

Tectonic implications of the isotopic geochemical steep zone in eastern Yunnan, china

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chinese Science Bulletin 1999年第S2期44卷 195-196页

作者： dong yunpeng, {2. and chang xiangyang guangzhou institute of geochemistry, chinese academy of sciences, guangzhou 510640, china guangzhou institute of {2. Chinese Academy of Sciences Guangzhou 510640 China

THE studies on geology, geochemistry and geophysics of mantle and crust show that there exist distinctvertical and lateral heterogenetics of the composition and structures of lithosphere. Especially, continentallithosphere possesses a complex rheological structure, which is one of the important factors controlling thedeformation and evolution of continent. Recently, the comprehensive studies in china and other countries suggest that the geochemical mapping and provincial division is a reliable method to reveal the heterogenetics, and Pb isotopic compositionhaving strong tectonic and regional characteristics. Therefore, Pb isotopic mapping is a key to revealingthe structure, formation and evolution of the lithosphere. Based on Pb isotopic mapping in South chinacontinent, it has been revealed that there exists a Pb isotopic geochemical steep zone between Yangtzeblock and Cathaysia

关键词： tetonics isotopic steep zones Yunnan.

Features of inclusions in the Funiushan gold deposits of Central china and its implications for prospecting

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chinese Science Bulletin 1999年第S2期44卷 15-16页

作者： ZHANG zhengwei~1, zhu bingquan~1 and DENG Jun~2.1. {2. institute of geochemistry, chinese academy of sciences, guangzhou 510640, china 2. china University of Geoscience, Beijing 100083, china guangzhou institute of {2. Chinese Academy of Sciences Guangzhou 510640 China china University of Geoscience Beijing 100083 China

GOLD mineralization popularly occurs in Funiushan area. Based on the studies on more than 40 gold deposits or ore spots, it is shown that most of them are small in scale except the Pengou gold deposit, whichcan be developed into a medium one. The Pengou is a gold deposit of medium-low temperature hydrothermal type. 1 Geological setting The Funiushan gold mineralization zone lying in the contiguous region of Nanzhao, Fangcheng andLushan Counties, Henan Province, is stituated on the tectonic and geochemical boundary between theNorth china block and Qinling Orogenic belt, and transverses the two first-grade tectonic units. Thehost rocks are mainly the strata of Xionger group （Pt2./sub> ） and the Funiushan granitic batholith. The Penggougold deposit is just located on the large-scale fault of Xiatang-Guihe. A series of metamorphic rocks ofXionger Group outcroped in the north of the deposit. 2.The features of deposit The ore bodies mostly appear in thick plate with sag-and-swell variation. The gold-bearing alterationzone from upper to lower layers can be divided as granite→ pyritization and phyllic alteration→ alteredgranitic porphyry→quartz vein→pyritization and phyllic alteration→cataclastic granite with phyllic alteration, i. e. the upper and lower gold-bearing layers can be separated by the altered granite. The ore

关键词： gold deposit inclusion geochemistry Funiushan.

Proterozoic copper metaliogenic framework and geochemistry steep zone in central Yunnan Province

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chinese Science Bulletin 1999年第S2期44卷 163-164页

作者： chang xiangyang, {2. and dong yunpeng guangzhou institute of geochemistry, chinese academy of sciences, guangzhou, 510640, china

THE wildly horizontal and vertical chemical heterogeneties, which result from the inchoate core-mantledifferentiation of the globe and the spatio-temporal difference of various regions in the globe, bring on themantle and crust from different landmass and oceans with markedly elemental and isotopic *** these signatures could be used to differentiate the attribute from various landmass or oceans andrecover the scent of kinematics and chemical geodynamics process. It is a quantificational method compared with the division by geotectonics facies and paleontologic fauna. Based on the geochemistry mapping of elements and multi-isotopic systematics of rocks derived frommantle and crust and combined with the studies on geophysical tomographic image, four type geochemicalprovinces can be distinguished. They are: (i) the Pacific (such as N-Pacific, N-Atlantic, the

关键词： Proterozoic copper metallogenesis geochemical steep zone Yunnan.

Relation of Isotope Geochemical Steep Zones with Geophysical Fields and Tectonics in the Junction Area of the Cathaysian,Yangtze and Indochina Plates

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 236-240页

作者： zhu bingquan dong {2. chang xiangyang ZHANG zhengwei guangzhou institute of {2. Chinese Academy of SciencesGuangzhou 510640Guangdong

Through lead isotope geochemical mapping in the Yunnan-Guizhou area geochemical steep zones (GSZ) have been established, which clearly reveal the junction relationship of the Cathaysian, Yangtze and Indo-china plates. GSZ are closey related to gravity Moho gradient zones and lithospheric thickness. The GSZ between the Yangtze and Cathaysian plates is consistent with the Shizong-Mile tectonic belt, where island are basalts are well developed. The Yangtze-Indo-china GSZ is parallel to the Jing{2.-Mojiang volcanic belt in rift-island are environments. The evidence of geology, geophysics and geochemistry all indicates that Cathaysia was subducted towards the Yangtze plate and that the Yangtze plate was underthrust beneath the Indo-china, which took place from the Early Carboniferous to the Early Triassic.

关键词： junction relationship of the Cathaysia Yangtze and Indo-china plates geochemical steep zone gradient zone of gravity Moho

Lead Isotopic Steep-Dipping Zone and　Mineralization—An Example from　Mineral Deposits Concentrated　Area in East Qinling,china

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Journal of Earth Science 2000年第1期19卷 68-75页

作者： Zhang zhengwei zhu bingquan {2. institute of geochemistry, china academy of Science, guangzhou 510640 Cai Keqin Deng Jun Department of Earth and Mineral Resources, china University of Geosciences, Beijing 100083 Wang Wei Qiang Lizhi Henan

Lead isotopic geochemical steep-dipping zone usually exists on inhomogeneous boundaries of earth blocks. Its crossing with the geophysical gradient zone often convergently occurs at giant deposits. Deep structures or concealed structural planes obviously have the coupling relationship with the convergent area of mineral deposits. The geochemical steep-dipping zone is usually distributed along the boundary of ancient continental blocks. Its crossing effect with geophysical gradient zone is usually presented as depression or swell of Moho discontinuity on the crossing direction with the ancient continental margin, which would lead to form deep fractures of earth crust at block margins or lead to adjustment of earth crust texture. The deep hydrothermal liquid would rise up along the structural planes to form the convergent areas of mineral deposits. For example, Luonan- Luanchuan area in east Qinling is a typical crossed area of the geochemical steepdipping zone and geophysical gradient zone. The mineral deposit belt extends along EW direction. It was controlled by the geochemical steepdipping zone equidistantly distributed along NE direction like a string of beads controlled by a gravity gradient zone in NE direction and a mantle depression slope. Along a plunging mantle syncline on EW plunging direction, from the east to the west, checkform was distributed which controls synergic crustmantle granoporphyry rocks. Therefore, a convergent mineralization area of Mo, W, Zn and Au giant deposits occurred.

关键词： lead isotopic steep-dipping zone mineralization East Qinling.

Isotopic dating of the Chengjiang Fauna-bearing horizon in Central Yunnan Province, china

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chinese Journal Of geochemistry 2007年第4期26卷 345-349页

作者： chang xiangyang CHEN Liangzhong HU Shixue WANG Jianghai {2. Key Laboratory of Environmental Pollution Control and Isotopic Application of Guuangzhou City. guangzhou University Guangzhou 510006 China guangzhou institute of {2. chinese academy of sciences Guangzhou 510640 China Yunnan institute of Geological sciences Kunming 650011. China

Twenty black shale samples, which are free from the influence of weathering, were collected from the Chengjiang Fauna-bearing horizon, central Yunnan Province, yielding a Pb-Pb isochron age of 534±60 Ma. Although this age is younger than both the Rb-Sr isochron age and 40Ar-39Ar age, it should represent the lower isotopic age limit of the Chengjiang Fauna.

关键词：铅同位素同位素地质学地质年代学测定年龄

Identifications of products of geographical origin based on geochemical zoning

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chinese Journal Of geochemistry 2011年第1期30卷 138-144页

作者： chang xiangyang FU Shanming LIU Hui CHEN Nan ZHAO Xiaofeng {2. TU Xianglin College of Environment and Engineering Guangzhou University Guangzhou 510006 China guangzhou institute of {2. chinese academy of sciences Guangzhou 510640 China

The protection system of products of geographical origin has become one hot subject with which various countries throughout the world are concerned. Results of element-Pb isotope geochemical mapping indicate that there emerge a number of famous-brand high-quality product groups of geographical origin in china. The environment of production of china’s famous-brand white spirits of geographical origin at the Sichuan-Guizhou border is still a mystery to be solved. china has two main communities of white spirits of geographical origin, i.e., the most famous are Moutai and Wuliangye spirits. By element-Pb isotope geochemical tracing, we can establish the natural background geological, geographical and geochemical scientific data mark ers in close relation with source areas. Research on the product of geographical origin, named Kaempferia galangal L. in the Shuangjiao district, Yangchun, Guangdong Province, showed that the trace elements have an excellent heritance between Kaempferia galangal L. and soil in this area, and the trace elements are highly effective for tracing the origin.

关键词：原产地域产品地球化学分区微量元素辨识基础地球化学填图地球化学示踪铅同位素

热压烧结工艺对SmCo_(7)/α-(FeCo)复合永磁材料的结构和磁性能的影响

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广州化工 2024年第20期52卷 84-88页

作者：徐刚徐成刘青山朱晓宇何嵘竹文坤熊政伟西南科技大学数理学院/极端条件物质特性实验室四川绵阳621010 中国电子科技集团公司第九研究所四川绵阳621010 四川省军民融合研究院四川绵阳621010

通过传统粉末冶金技术,结合热压烧结法制备了SmCo_(7)/α-(FeCo)复合永磁材料,研究了热压烧结工艺对其磁性能的影响规律。在固定压力100 MPa下,调控热压烧结温度由800℃升高到1000℃,SmCo_(7)/α-(FeCo)合金的相组成由三相变为两相;其... 详细信息

通过传统粉末冶金技术,结合热压烧结法制备了SmCo_(7)/α-(FeCo)复合永磁材料,研究了热压烧结工艺对其磁性能的影响规律。在固定压力100 MPa下,调控热压烧结温度由800℃升高到1000℃,SmCo_(7)/α-(FeCo)合金的相组成由三相变为两相;其中软磁相含量由31.5wt%降低到5.1wt%。软磁相α-(FeCo)的晶粒尺寸由15μm增加到34μm,其形貌由球形向圆盘状转变。在热压温度900℃时SmCo_(7)/α-(FeCo)复合永磁材料的磁性能最佳。基于优化的900℃热压温度下,我们进一步研究了压力对复合永磁材料的结构和性能影响;烧结压力的增加可以有效促进其硬磁相SmCo_(7)的(002.织构,增强其各向异性和硬磁相SmCo_(7)晶粒的取向度。在优化的热压烧结温度900℃和压力2.0 MPa下,我们制备出具有较高性能的SmCo_(7)/α-(FeCo)复合永磁材料,其剩磁、矫顽力和磁能积分别为12.6 kG、5.2.kOe和2..0 MGOe。与传统的机械合金化法制备的SmCo基复合永磁材料相比,单轴热压烧结法制备的SmCo_(7)/α-(FeCo)综合磁性能显著提高。本文采用单轴热压法系统研究了高温-高压对SmCo基复合永磁体结构和磁性能的影响,获得了性能优异的复合永磁体,为SmCo基复合永磁体性能提升和工业应用提供了理论依据和技术指导。

关键词：热压温度 SmCo 相组成磁性能

桑枝低聚糖促枯草芽孢杆菌增殖工艺优化及其对产短链脂肪酸的作用

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食品研究与开发 2024年第16期45卷 105-112页

作者：李仕培朱向阳邹宇晓杨琼王弘黎尔纳华南农业大学食品学院广东广州510642 广东省农业科学院蚕业与农产品加工研究所农业农村部功能食品重点实验室广东省农产品加工重点实验室广东广州510610 广西五和博澳药业有限公司广西河池546399

为确定促进枯草芽孢杆菌增殖的最佳桑枝低聚糖酶解条件,以枯草芽孢杆菌增殖率为指标,利用单因素试验探究酶添加量、酶解温度和酶解时间对增殖率的影响,结合响应面法优化桑枝低聚糖的酶解工艺,并探究桑枝低聚糖对枯草芽孢杆菌产短链脂肪... 详细信息

为确定促进枯草芽孢杆菌增殖的最佳桑枝低聚糖酶解条件,以枯草芽孢杆菌增殖率为指标,利用单因素试验探究酶添加量、酶解温度和酶解时间对增殖率的影响,结合响应面法优化桑枝低聚糖的酶解工艺,并探究桑枝低聚糖对枯草芽孢杆菌产短链脂肪酸的影响。结果表明,最佳的桑枝低聚糖酶解工艺条件为酶添加量1008 U/mL、酶解温度45℃、酶解时间4 h,该条件下枯草芽孢杆菌增殖率为(190.17±3.74)%。优于同等质量浓度下桑枝多糖对枯草芽孢杆菌的增殖率,此外桑枝低聚糖可以显著提高枯草芽孢杆菌产乙酸和丙酸的能力。桑枝低聚糖对枯草芽孢杆菌具有良好的促增殖潜力。

关键词：桑枝低聚糖枯草芽孢杆菌增殖作用工艺优化短链脂肪酸