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Scheelite elemental and isotopic signatures:Implications for the genesis of skarn-type W-Mo deposits in the Chizhou Area,Anhui Province,Eastern China

Scheelite elemental and isotopic signatures:Implications for...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： GUOXUE SONG KEZHANG QIN GUANGMING LI NOREEN j.evans LEI CHEN Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences john de Laeter Centre for Isotope Research Applied GeologyCurtin University Institute of Mineral Resources Chinese Academy of Geological Sciences

Scheelite is well developed in hydrothermal deposits,providing a window into genetic processes and facilitating comparative studies,however,few studies have focused on characterizing scheelite in skarn-type W-Mo *** primary ore mineral in the jitoushan and Baizhangyan skam-type W-Mo deposits(Anhui Province,Eastern China),scheelite was analyzed for major,trace,and rare earth element(REE) abundance and for Sr-Nd *** analysis revealed two unique geochemieal characteristics that distinguish the scheelite from skarn-type W-Mo deposits to that from vein-type Au-W and porphyry-type W-Mo deposits:higher Mo content with a negative coixelation between MoO and WO and a strong HREE ***-type scheelite mainly inherited REE signatures from ore-forming fluids,and the early precipitation of skam minerals(e.g.,garnet,diopside,and amphibole) has most likely resulted in the observed strong HREE depletion in scheelite and the decoupling of LREEs and *** the numerous substitution mechanisms suggested by previous workers,3Ca = 2REE +- □Ca(where □Ca is a Ca-site vacancy) is preferred for the substitution of RHH for Ca and in this study,particularly given the low salinity of ore *** the scheelite Eu anomalies were inherited from ore-forming fluids with variable redox conditions and pH,the complex SEu/Mo correlation indicates that Mo increasingly entered the scheelite under oxidizing conditions and reached a maxim at 8Eu values of 0.8 to *** contrast,under reducing conditions,Mo contents in scheelite decrease gradually and Mo is precipitated as molybdenite as a result of the change in dominant valence *** the Sr-Nd isotope compositions of scheelite from vein-type Au-(W) and W-(Sb-Au) deposits,the scheelite from skam-type W-Mo deposits has low(Nd/Nd)(t)(most jit

关键词： Skarn-type scheelite trace element substitution REE Sr-Nd isotope Eu anomaly W-Mo deposits Chizhou

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Mesozoic magmatism and metallogeny in the Chizhou area,Middle-Lower Yangtze Valley,SE China:Constrained by petrochemistry,geochemistry and geochronology

Mesozoic magmatism and metallogeny in the Chizhou area,Middl...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Guoxue Song Kezhang Qin Guangming Li Noreen j.evans Xianhua Li Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences john de Laeter Centre for Isotope Research Applied GeologyCurtin University Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

The Chizhou area,southeast China,hosts extensive W-Mo-Pb-Zn and Cu-Au deposits but remains relatively unstudied.A wide range of Mesozoic magmatic intrusives were analyzed(whole-rock geochemistry,Sr-Nd isotopes,zircon U-Pb dating,and zircon Lu-Hf isotopes) in order to elucidate their genesis,relationship to W-Mo-Pb-Zn-Cu-Au mineralization,and the tectonic setting of *** U-Pb geochronology yielded a range of ages(147-110 Ma) encompassing three magmatic episodes;147-135 Ma,130-120 Ma,and 115-110 *** work marks the first time the youngest episode has been *** oldest episode resulted in the formation of small granite porphyries,always associated with skarn-porphyry type W-Mo-Pb-Zn-Cu-Au deposits under an extensional *** 130-120 Ma and 115-110 Ma intrusives were the products of enhanced N-S extension with no associated mineralization.A comparative study reveals two types of magmatism-mineralization systems:acid magmatic rocks in the Chizhou area related to skarn-porphyry type W-Mo-Pb-Zn-Cu-Au deposits and intermediaLe-acid magmatic rucks in the Tongling area relaLed to skarn-porphyry type Cu-Au-Fe-S ***-rock Sr-Nd isotopes,zircon Lu-Hf isotopes,and inherited zircon U-Pb ages suggest that the lower crust and meso-neoproterozoic Shangxi group rocks were the main sources of magmatic rocks and related W-Mo-Pb-Zn-Cu-Au deposits.A genetic model for Mesozoic magmatism-skarn-porphyry type W-Mo-Pb-Zn-Cu-Au mineralization involves partial melting of the lower crust,mixing with the remelted products of Meso-neoproterozoic Shangxi group rocks,and assimilation/fractional crystallization *** from this study suggest that there is great potential for the discovery of more and larger skarn-porphyry type W-Mo deposits in the transitional W-Mo-Pb-Zn metallogenic belt.

关键词： Middle-Lower Yangtze Valley Chi zhou Mesozoic Magmatism-mineralization Shangxi group Partial melting

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In situ LA-(MC)-ICP-MS trace element and Nd isotopic compositions and genesis of polygenetic titanite from the Baogutu reduced porphyry Cu deposit,Western junggar,NW China

In situ LA-(MC)-ICP-MS trace element and Nd isotopic composi...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Mingjian Cao KeZhang Qin GuangMing Li Noreen j.evans LuYing jin Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences john de Laeter Center for Isotope Research Department of Applied GeologyCurtin University University of Chinese Academy of Sciences

Titanite(sphene,Ca Ti Si O5)is sensitive to changes in temperature,oxygen and water fugacity,and fluid *** order to understand formation processes and the nature of hydrothermal fluids,various types of titanite from Cu ores at the Baogutu reduced porphyry Cu deposit were chosen for detailed *** titanite is associated with biotite,plagioclase and K-feldspar,whereas hydrothermal titanite occurs with K-feldspar,chlorite,actinolite and *** formation of hydrothermal titanite was related to hydration of igneous minerals under high f H2O,whereas the widespread replacement of ilmenite by titanite(without magnetite)indicates a relatively low oxygen *** titanite has low Al,high Fe,Y,Sn,Zr,Nb and REE contents,relative to hydrothermal *** the basis of the Zr-in-titanite and Al-in-chlorite geothermometers,formation temperatures for magmatic and hydrothermal titanite are estimated to be 687–739°C and 250–670°C,*** gradual decrease in REE,Y and Sn contents from magmatic to late hydrothermal titanite was probably caused by precipitation of REE-bearing *** and hydrothermal titanites have similar chondrite-normalized REE patterns with negative Eu anomalies and relatively flat *** selected titanites have Nd isotopic compositions similar to the host ***,both magmatic and hydrothermal titanite are believed to have been predominantly derived from a mantle source.

关键词： Baogutu reduced porphyry Cu deposit Titanite Trace elements In situ Nd isotopes Zr-in-titanite geothermometer

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Stratix II器件的外部存储器接口选择

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电子技术应用 2007年第8期33卷 161-163页

作者： Paul evans Altera公司

用户在实现DDR或者DDR2 SDRAM接口时，怎样选择合适的Ahera Stratix Ⅱ、Stratix Ⅱ GX和HardCopyⅡ器件的外部存储器接口方案，一般有两种选择：

关键词： Stratix 外部存储器接口器件 DDR2 SDRAM 接口方案

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Three co-located resistance genes confer resistance to leaf rust and stripe rust in wheat variety Borlaug 100

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The Crop journal 2022年第2期10卷 490-497页

作者： Bowei Ye Ravi P.Singh Chan Yuan Demei Liu Mandeep S.Randhawa julio Huerta-Espino Sridhar Bhavani evans Lagudah Caixia Lan College of Plant Science&Technology Huazhong Agricultural UniversityWuhan 430070HubeiChina International Maize and Wheat Improvement Center(CIMMYT) Apdo.Postal 6-64106600 Mexico D.F.Mexico Qinghai Provincial Key Laboratory of Crop Molecular Breeding Northwest Institute of Plateau BiologyChinese Academy of ScienceXining 810008QinghaiChina Campo Experimental Valle de México INIFAP Apdo.Postal 1056230ChapingoEdo.de MexicoMexico CSIRO Agriculture&Food GPO Box 1600CanberraACT 2601Australia

Leaf rust(LR) and stripe rust(YR) are important diseases in wheat producing areas worldwide and cause severe yield losses under favorable environmental conditions when susceptible varieties are grown. We determined the genetic basis of resistance to LR and YR in variety Borlaug 100 by developing and phenotyping a population of 198 F6 recombinant inbred lines derived from a cross with the susceptible parent Apav#1. LR and YR phenotyping were conducted for 4 and 3 seasons, respectively, at CIMMYT research stations in Mexico under artificial epidemics. Mendelian segregation analyses indicated that 3–5 LR and 2 YR genes conferred resistance in Borlaug 100. Lr46/Yr29(1 BL), Yr17(2 AS) and Yr30(3 BS) were present in the resistant parent and segregated in the RIL population based on characterization by molecular markers linked to these genes. When present alone, Lr46/Yr29 caused average 13% and 16% reductions in LR and YR severities, respectively, in RILs. Similarly, Yr17 and Yr30 reduced YR severities by 57% and 11%, respectively. The Yr30 and the Yr17 translocation were also associated with 27% and 14% reductions, respectively, in LR severity, indicating that the 3 BS and 2 AS chromosomal regions likely carry new slow rusting LR resistance genes, temporarily designated as Lr B1 and Lr B2, respectively. Additive effects of Yr30*Yr17, Yr29*Yr17 and Yr29*Yr30 on YR and LR were significant and reduced YR severities by 56%,55%, and 45%, respectively, and LR severities by 34%, 40%, and 45%, respectively. Furthermore, interaction between the three genes was also significant, with mean reductions of 70% for YR and 54% for LR severities. Borlaug 100, or any one of the 21 lines with variable agronomic traits but carrying all three colocated resistance loci, can be used as resistance sources in wheat breeding programs.

关键词： Co-located resistance loci Common wheat Gene interaction Puccinia triticina Puccinia striiformis Triticum aestivum

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世界禽蛋产业全景展望

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中国家禽 2009年第15期31卷 5-7页

作者： Terry evans

文章对四大洲的主要禽蛋生产和加工国家的近况进行了总结,并对未来的发展进行了展望,为该产业的发展提供借鉴。

关键词：禽蛋加工市场展望

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Rapid,high-resolution detection of environmental change over continental scales from satellite data–the Earth Observation Data Cube

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International journal of Digital Earth 2016年第1期9卷 106-111页

作者： Adam Lewis Leo Lymburner Matthew B.j.Purss Brendan Brooke Ben evans Alex Ip Arnold G.Dekker james R.Irons Stuart Minchin Norman Mueller Simon Oliver Dale Roberts Barbara Ryan Medhavy Thankappan Rob Woodcock Lesley Wyborn Geoscience Australia CanberraAustralia National Computational Infrastructure Australian National UniversityCanberraAustralia Commonwealth Scientific and Industrial Research Organisation CanberraAustralia NASA Goddard Space Flight Center GreenbeltMDUSA Research School of Finance Actuarial Studies and Applied StatisticsANUCanberraAustralia The Group on Earth Observations Secretariate GenevaSwitzerland

The effort and cost required to convert satellite Earth Observation(EO)data into meaningful geophysical variables has prevented the systematic analysis of all available *** overcome these problems,we utilise an integrated High Performance Computing and Data environment to rapidly process,restructure and analyse the Australian Landsat data *** this approach,the EO data are assigned to a common grid framework that spans the full geospatial and temporal extent of the observations–the EO Data *** approach is pixel-based and incorporates geometric and spectral calibration and quality assurance of each Earth surface reflectance *** demonstrate the utility of the approach with rapid time-series mapping of surface water across the entire Australian continent using 27 years of continuous,25 m resolution *** preliminary analysis of the Landsat archive shows how the EO Data Cube can effectively liberate high-resolution EO data from their complex sensor-specific data structures and revolutionise our ability to measure environmental change.

关键词： Earth Observation Data Cube HPD HPC surface water Landsat Australia

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MgO/γ-Al_2O_3烷氧基化催化剂制备及结构与性能研究

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精细化工 2003年第2期20卷 74-77页

作者：张蕊李殿卿张法智 D.G.evans 段雪北京化工大学可控化学反应科学与技术基础教育部重点实验室北京100029

在γ Al2 O3 载体上浸渍Mg (NO3 ) 2 ·6H2 O ,然后分别经 40 0、45 0和 5 0 0℃焙烧制成MgO/γ Al2 O3 固体碱催化剂。结果表明 ,MgO在γ Al2 O3 载体表面具有单层分散性质 ,当MgO的负载量低于某一数值 (阈值 )时 ,从样品的X光粉末衍... 详细信息

在γ Al2 O3 载体上浸渍Mg (NO3 ) 2 ·6H2 O ,然后分别经 40 0、45 0和 5 0 0℃焙烧制成MgO/γ Al2 O3 固体碱催化剂。结果表明 ,MgO在γ Al2 O3 载体表面具有单层分散性质 ,当MgO的负载量低于某一数值 (阈值 )时 ,从样品的X光粉末衍射谱图上观察不到MgO的特征衍射峰 ,负载量超过阈值时开始出现MgO的晶相 ,且MgO的XRD衍射峰强度随MgO的负载量的增加而增加 ,其单分散阈值为 0 0 80 gMgO/ 10 0m2 γ Al2 O3 。应用CO2 TPD技术测定了样品的碱性 ,结果表明 ,样品在接近阈值时其碱量大幅度增加 ,碱强度提高。样品的比表面最初随着MgO负载量的增加而下降 ,但达阈值后基本保持不变。

关键词：制备结构性能研究 MgO/γ-Al2O3 烷氧基化催化剂单层分散阈值

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硼酸根插层水滑石层间组成及取向结构的控制

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化学学报 2004年第13期62卷 1205-1210,J001页

作者：李素锋李殿卿史翎杨兰蒲敏 evans D.G 段雪北京化工大学可控化学反应科学与技术基础教育部重点实验室北京100029

以Mg0 .67Al0 .3 3 (OH) 2 (CO3 ) 0 .165·0 .62H2 OLDHs为前体 ,以水为分散介质 ,由离子交换法组装了硼酸根插层LDHs ,并用XRD ,FT IR ,TG DTA ,ICP ,11BMASNMR等手段对样品进行了分析和表征 .结果表明 ,通过控制离子交换时的pH ,可... 详细信息

以Mg0 .67Al0 .3 3 (OH) 2 (CO3 ) 0 .165·0 .62H2 OLDHs为前体 ,以水为分散介质 ,由离子交换法组装了硼酸根插层LDHs ,并用XRD ,FT IR ,TG DTA ,ICP ,11BMASNMR等手段对样品进行了分析和表征 .结果表明 ,通过控制离子交换时的pH ,可使硼酸根取代Mg Al CO3 LDHs前体层间的CO2 -3 ,且可控制离子交换程度及客体的取向 ,从而控制插层结构 .对硼酸根插层LDHs的结构进行研究发现 ,控制pH =4.5 ,层间阴离子主要是一硼酸根和离子平面与LDHs层板平行的三硼酸根 ,出于结构稳定的需要 ,CO2 -3 不能完全被置换 ;控制pH =3 .5 。

关键词：硼酸根插层水滑石层间组成取向结构离子交换硼酸 pH值阻燃剂

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心脏移植的术后护理

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心肺血管病杂志 1994年第2期13卷 117-117,122页

作者： evans,j 杨禁非

心脏移植的术后护理ＪｕｌｉｅＥｖａｎｓ．心脏移植的术后护理集中围绕着取得血液动力学的稳定性，控制感染、监测免疫抑制剂的副作用、环境的调控，运动的训练以及对于恢复，事先给予教育和指导。护士必须经过护理非心脏移植病人的训... 详细信息

心脏移植的术后护理ＪｕｌｉｅＥｖａｎｓ．心脏移植的术后护理集中围绕着取得血液动力学的稳定性，控制感染、监测免疫抑制剂的副作用、环境的调控，运动的训练以及对于恢复，事先给予教育和指导。护士必须经过护理非心脏移植病人的训练，护士在取得护理心脏手术的必要技...

关键词：心脏移植手术后护理

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