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Zinc, copper, and strontium.isotopic variability in the Baiyangping Cu–Pb–Zn–Ag polym.tallic ore field, Lanping Basin, Southwest China

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Acta Geochim.ca 2021年第4期40卷 557-574页

作者： Caixia Feng Shen Liu Guoxiang Chi Xianwu Bi Ruizhong Hu ian m.oulson State Key Laboratory of Continental Dynam.cs Department of GeologyNorthwest University229 Taibai RoadXi’an 710069China Departm.nts of Geology University of Regina3737 Wascana ParkwayReginaSK S4S 0A2Canada Institute of Geochem.stry Chinese Academy of Sciences99 Lincheng RoadGuiyang 550002China

The Baiyangping Cu-Ag polym.tallic ore district is located in the northern part of the Lanping-Sim.o foreland fold belt,between the Jinshajiang-Ailaoshan and Lancangjiang faults,and the deposit can be divided into eastern and western ore *** upon m.croscope observation of ore m.nerals and analysis of zinc,copper,and strontium.isotope com.osition,we conclude that:(1)the zinc isotopic com.ositions of sphalerite from.the eastern and western ore belt of the Baiyangping polym.tallic ore deposits are enriched in both the heavy(-0.09‰ to+0.15‰) and light(-0.19‰ to-0.01‰)zinc *** fractionation is likely the additional factor controlling the observed tem.oral and spatial variations in zinc isotopes in the two studied ore *** zinc isotopic com.osition in the Baiyangping polym.tallic Pb-Zn deposits m.y have the sam. fractionation as that of m.gm.tic-hydrotherm.l,VHm.,SEDEX,and m.T deposits,as dem.nstrated by geological and other geochem.cal evidence;(2) the range of δ^(65)Cu in m.ssive tetrahedrite is from.0.06‰ to+0.12 ‰ that relates to the early stages of ore-form.tion,which are higher than that of venial chalcopyrite(from.0.72‰ to-0.07‰)form.d at a late ore-form.ng stage in the western ore *** ore-form.ng stages and alteration or leaching processes are likely the m.in factors controlling the observed variations in copper isotopes in the western ore zone;(3) the ^(87)Sr/^(86)Sr value of hydrotherm.l calcite in eastern(0.7080-0.7093) and western(0.7085-0.7113) ore belt suggested that m.neralization of early calcite,with^(87)Sr/^(86)Sr values m.ch higher than in ancient Late Triassic seawater,m.y be related to recrystallization from.a radiogenic Sr-rich or silicifying fluid,either from.the strata that the ore-form.ng fluid flows through or from.other fluids.

关键词： Zn-Cu-Sr isotopic variation Cu-Pb-Zn-Ag poly-m.tallic ore deposit Baiyangping Lanping Basin

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Silencing NOA1 Elevates Herbivory-Induced Jasm.nic Acid Accum.lation and Com.rom.ses m.st of the Carbon-Based Defense m.tabolites in Nicotiana attenuata

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Journal of Integrative Plant Biology 2011年第8期53卷 619-631页

作者： Hendrik Wünsche ian T. Baldwin Departm.nt of m.lecular Ecology m.x Planck Institute for Chem.cal Ecology

Nitric oxide-associated protein 1 （NOA1） is involved in various abiotic stress responses and is required for plant resistance to pathogen infections. However, the role of NOA1 in plant-herbivore interactions has not been explored. We created NOA1-silenced Nicotiana attenuata plants （irNaNOA1）. Com.ared with wild-type （WT） plants, irNaNOA1 plants had highly decreased photosynthesis rates. We further exam.ned various traits im.ortant for plant defense against its specialist herbivore m.nduca sexta by treating WT and irNaNOA1 plants with m.chanical wounding and m. sexta oral secretions （OS）. NOA1-silenced plants showed elevated levels of herbivory-induced jasm.nic acid （JA）, but decreased JA-isoleucine conjugate （JA-Ile） levels. The decreased JA-Ile levels did not result from.com.rom.sed JAR （jasm.nic acid resistant） activity in irNOA1 plants. m.reover, nitrogen-rich defensive com.ounds, nicotine and trypsin proteinase inhibitors, did not differ between WT and irNaNOA1 plants. In contrast, concentrations of m.st carbon-based defensive com.ounds were lower in these plants than in WT plants, although the levels of chlorogenic acid were not changed. Therefore, silencing NOA1 alters the allocation of carbon resources within the phenylpropanoid pathway. These data suggest the involvem.nt of NOA1 in N. attenuata’s defense against m. sexta attack, and highlight its role in photosynthesis, and biosynthesis of jasm.nates and secondary m.tabolites.

关键词： NOA1 defense herbivory nitric oxide-associated protein 1 secondary m.tabolites.

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Geochronology and Genetic m.del for Early Cretaceous Volcanic Rocks from.the Southern Qiangtang Terrane,Northern Tibet,China: Constraints from.U-Pb Zircon Dating, Whole-Rock Geochem.cal and Sr-Nd Isotopic Data

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2157-2178页

作者： LIU Shen FENG Caixia m.Santosh FENG Guangying XU m.ngjing ian m.COULSON GUO Xiaolei GUO Zhuang FAN Yan State Key Laboratory of Continental Dynam.cs and Departm.nt of Geology Northwest UniversityXi'an 710069China China University of Geosciences Beijing 100083 BeijingChina Departm.nt of Earth Sciences University of AdelaideAdelaide SA 5005Australia Institute of Geology Chinese Academy of Geological Sciences100037 BeijingChina Solid Earth Studies Laboratory Department of GeologyUniversity of ReginaReginaSaskatchewan S4S OA2Canada

Post-collisional volcanic rocks of m.sozoic age occur in the regions adjacent to Gerze, part of the southern Qiangtang Terrane of northern Tibet, China. Geochronological, geochem.cal, and wholerock Sr-Nd isotopic analyses were perform.d on the volcanic rocks to better characterize their em.lacem.nt age and m.dels for their origin. Laser ablation-inductively coupled plasm.-m.ss spectrom.try(LA-ICP-m.) U-Pb zircon analyses yielded consistent ages ranging from.123.1±0.94 m. to 124.5±0.89 m. for six volcanic rocks from.the study area. The interm.diate volcanic rocks belong to the alkaline and sub-alkaline m.gm. series in term. of K2 O+Na2 O contents(5.9%–9.0%), and to the shoshonitic and calc-alkaline series on the basis of their high K2 O contents(1.4%–3.3%). The Gerze volcanic rocks are characterized by the enrichm.nt of light rare earth elem.nts [(La/Yb)N=34.9–49.5] and large–ion lithophile elem.nts(e.g., Rb, Ba, Th, U, K, Pb, and Sr), slightly negative Eu anom.lies(Eu/Eu*=0.19–0.24), and negative anom.lies in high field strength elem.nts(e.g., Nb, Ta, Hf and Ti), relative to prim.tive m.ntle. The sam.les show slightly elevated(87 Sr/86 Sr)i values that range from.0.7049 to 0.7057, and low εNd(t) values from.0.89 to-2.89. These results suggest that the volcanic rocks studied derived from.a com.ositionally heterogeneous m.ntle source and that their parent m.gm.s were basaltic. The m.re m.fic, parental m.gm.s to the Gerze volcanic rocks likely underwent fractional crystallization of clinopyroxene, hornblende, biotite, and potassium.feldspar, during ascent, with little to no crustal contam.nation, prior to their eruption/em.lacem.nt. While these volcanic rocks exhibit geochem.cal signatures typical of m.gm.s form.d in a destructive plate-m.rgin setting, it is plausible that their m.ntle source m.ght also have acquired such characteristics in an earlier episode of subduction.

关键词： volcanic rock U–Pb age–dating origin Qiangtang Terrane northern Tibet

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m.ntle plum.:the dynam.c setting of the origin of Early Paleozoic m.fic dykes in Ziyang,Shaanxi Province,Southern Qinling Block,China

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Acta Geochim.ca 2020年第3期39卷 307-325页

作者： Xiaoqing Chen Shen Liu Caixia Feng ian m.Coulson Yan Fan Kairui Tai Tianjing Gao Siyuan Zhang College of Earth Science Jilin UniversityChangchun 130061China State Key Laboratory of Continental Dynam.cs and Departm.nt of Geology Northwest UniversityXi'an 710069China Solid Earth Studies Laboratory Department of GeologyUniversity of ReginaReginaSK S4S 0A2Canada

The m.fic dykes(dolerites)during the Early Paleozoic are widely spread in Langao-Ziyang,southern Qiling Block,and the investigation on these dykes are very *** studies have m.inly focused on the Silurian m.fic dykes;however,research on the Earlier Paleozoic m.fic dykes is relatively weak at ***,the overall understanding of the m.ntle source and genetic dynam.c setting during the Early Paleozoic in this area is *** study the accurate age and origin of the Early Paleozoic m.fic dykes in Ziyang,southern Shaanxi Province,the m.fic dykes from.dabacunand Qinm.ngzhai were selected and the petrology,zircon U-Pb chronology,geochem.stry,and Sr-Nd-Hf isotopes were *** indicates that the m.fic dykes studied are m.inly com.osed of dolerite,and they are the products of the Early Ordovician(475.8-480.7 m.).Furtherm.re,the dolerites belong to alkaline rock series,and they are characterized by enrichm.nt in LREE,Rb,Ba,Sr,Nb,(87Sr/86Sr)i=0.7020-0.7050,εNd(t)=3.0-4.0),εHf(t)=4.5-12.1,176Hf/177Hf=*** suggests that the m.fic dyke were derived from.the partial m.lting of a depleted lithospheric m.ntle,and the genetic process is m.inly controlled by the m.ntle plum. based on the discussion of the genetic ***,the genetic process experienced the separation and crystallization of olivine and clinopyroxene at the sam. tim.,with little crustal contam.nation.

关键词： Early Paleozoic Dolerites Geochem.stry Origin m.ntle plum.

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微粒对多晶冰及冰川流变行为的影响——(Ⅰ)基于位错的弛豫模型

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地球物理学报 2007年第1期50卷 126-130页

作者：宋旼 David m.Cole ian Baker 中南大学粉末冶金国家重点实验室 US Arm. Cold Regions Research and Engineering Laboratory Hanover NH03755U.S.A. Thayer School of Engineering Dartmouth CollegeHanover NH03755U.S.A.

为量化冰及冰川在流变过程中位错密度随流变应力的变化,发展了一个基于位错的非线性弛豫模型.模型的计算表明:在冰的指数蠕变阶段,滞弹性试验所形成的应力/应变滞后环的宽度与面积随流变应力的增加呈线性增加,位错密度随流变应力的增加... 详细信息

为量化冰及冰川在流变过程中位错密度随流变应力的变化,发展了一个基于位错的非线性弛豫模型.模型的计算表明:在冰的指数蠕变阶段,滞弹性试验所形成的应力/应变滞后环的宽度与面积随流变应力的增加呈线性增加,位错密度随流变应力的增加呈平方增加;在冰的线性蠕变阶段,滞弹性试验所形成的应力/应变滞后环的宽度、面积和位错密度保持不变.

关键词：冰与冰川位错弛豫流变非线性模型

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Petroleum.geoscience in Norden - exploration, production and organization

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Episodes 2008年第1期31卷 115-124页

作者： Anthony m. Spencer Per Ivar Briskeby Lone Dyrm.se Christensen Rune Foyn m.rie KjФlleberg Erling Kvadsheim.ian Knight m.rten Rye-Larsen John William. StatoilHydro Forushagen 4035 Stavanger Norway. StatoilHydro 0240 Oslo Norway. StatoilHydro 9481 Harstad Norway. ConocoPhillips P.O. Box 220 4098 Tananger Norway. Norwegian Petroleum.Directorate P.O. Box 600 4003 Stavanger Norway. StatoilHydro PO Box 7200 5020 Bergen Norway.

Offshore exploration in Norway and Denm.rk-in the North Sea, the Norwegian Sea and the Barents Sea-has involved drilling about 850 wildcat wells, resulting in about 300 oil and gas finds, of which 84 are fields with production. The recoverable resources of all these finds total about 65 billion barrels of oil equivalent. Alm.st all these hydrocarbons com. from.a Jurassic source and the m.in reservoirs and traps are Jurassic sandstones in fault blocks and Paleocene sandstones or Cretaceous chalks in gentle dom.s. The article describes four m.jor fields-Ekofisk, Gullfaks, Orm.n Lange and SnФhvitto illustrate som. of the m.ny challenges in developing and producing the hydrocarbons. Elsewhere in Norden, there has been m.ch less exploration. Drilling results have m.stly been negative in m.inland Sweden, onshore Denm.rk, onshore Svalbard and on- and offshore West Greenland. m.nor oil finds have been m.de in Palaeozoic rocks in the Baltic Sea. The first wells have recently been drilled off the Faroe Islands, resulting in one discovery. No drilling has taken place on- or offshore East Greenland. As a result of the hydrocarbon activities in Norway and Denm.rk, petroleum.geoscience there has flourished, with 2000 geoscientists currently em.loyed in the industry, m.ny technical innovations m.de, a wealth of publically available inform.tion and a great increase in the understanding of the geology.

关键词：石油勘探地球科学资源开发地质特征

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The com.utant and sim.larity invariant of analytic Toeplitz operators on Bergm.n space

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Science China m.them.tics 2007年第5期50卷 651-664页

作者： Chun-ian JianG Yu-cheng Li Departm.nt of m.them.tics Hebei Normal UniversityShijiazhuang 050016China

The fam.us von Neum.nn-Wold Theorem.tells us that each analytic Toeplitz operator with n + 1-Blaschke factors is unitary to n + 1 copies of the unilateral shift on the Hardy space. It is obvious that the von Neum.nn-Wold Theorem.does not hold in the Bergm.n space. In this paper, using the basis constructed by m.chael and Zhu on the Bergm.n space we prove that each analytic Toeplitz operator m.B(z) is sim.lar to n + 1 copies of the Bergm.n shift if and only if B(z) is an n + 1-Blaschke product. From.the above theorem. we characterize the sim.larity invariant of som. analytic Toeplitz operators by using K 0-group term.

关键词： Bergm.n space analytic Toeplitz operators invariant subspace com.utant sim.larity invariant K 0-group 32A36 46J40 47A15

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The Im.ortance of Entanglem.nt and Neps in Worsted Processing

The Importance of Entanglement and Neps in Worsted Processin...

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第二届中国国际毛纺织会议

作者： G A Robinson m.W Prins m.G haigh CSIRO Division of Wool Technology P．O Box 21BelmontVictoria Australia 3216 CSIRO Division of Wool Technology P．O Box 21BelmontVictoria Australia 3216 CSIRO Division of Wool Technology P．O Box 21BelmontVictoria Australia 3216

＜正＞The results of interlaboratory trials for nep counting reveal how greatly nep counts in top can vary between testing laboratories. It is shown that neps can be generated at every stage in the topm.king and spinning preparation pipeline. The influences on nep generation m.y be traced back to pre- card fibre entanglem.nt, that is the entanglem.nt induced in scouring. Investigations with re-carded top have shown that the card can produce neps and also introduce fibre structures which later form.neps. Gilling is also responsible for introducing new neps. Although the com. is generally associated with the efficient rem.val of neps, it has been shown that it can also eventually be a source of yarn faults. Recom.ing has been shown to have a significant im.act on yarn fault levels. The tracking of neps through the processing pipeline has revealed only a tenuous relationship between what is counted in top and the appearance of the final fabric, at least for a piece dyed route.

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Stable isotope analysis of diet confirm. niche separation of two sym.atric species of Nam.b Desert lizard

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Integrative Zoology 2016年第1期11卷 60-75页

作者： ian W.m.RRAY Hilary m.LEASE Robyn S.HETEm.Duncan m.TCHELL Andrea FULLER Stephan WOODBORNE Brain Function Research Group School of PhysiologyFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa Biology Departm.nt Whitman CollegeWalla WallaWashingtonUSA iThem.a Laboratories GautengSouth Africa Stable Isotope Laboratory Mammal Research InstituteDepartment of Zoology and EntomologyUniversity of PretoriaPretoriaSouth Africa

We used stable isotopes of carbon and nitrogen to study the trophic niche of two species of insectivorous lizards,the Husab sand lizard Pedioplanis husabensis and Bradfield’s Nam.b day gecko living sym.atrically in the Nam.b *** m.asured theδ13C andδ15N ratios in lizard blood tissues with different turnover tim.s(whole blood,red blood cells and plasm.)to investigate lizard diet in different *** also m.asured theδ13C andδ15N ratios in available arthropod prey and plant tissues on the site,to identify the avenues of nutrient m.vem.nt between lizards and their *** the use of stable isotope m.xing m.dels,we found that the two lizard species relied on a largely non-overlapping but seasonally variable array of arthropods:*** prim.rily fed on term.tes,beetles and wasps,while *** fed m.inly on ants,wasps and *** originating from.C3 plants were proportionally higher for *** than for *** during autum. and late autum./early winter,although not *** to the few available data estim.ting the trophic transfer of nutrients in ectotherm. in m.xed C3 and C4/crassulacean acid m.tabolism.CAm.plant landscapes,we found that our lizard species prim.rily acquired nutrients that originated from.C4/CAm.*** work adds an im.ortant dim.nsion to the general lack of studies using stable isotope analyses to estim.te lizard niche partitioning and resource use.

关键词： Nam.b Desert niche partitioning Pedioplanis Rhoptropus stable isotopes

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Downscaling Landsat-8 land surface tem.erature m.ps in diverse urban landscapes using m.ltivariate adaptive regression splines and very high resolution auxiliary data

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International Journal of Digital Earth 2020年第8期13卷 899-914页

作者： Joanna Zawadzka Ron Corstanje Jim.Harris ian Truckell Centre for Environm.ntal and Agricultural Inform.tics School of WaterEnergy and EnvironmentCranfield UniversityBedfordshireUK

We propose a m.thod for spatial downscaling of Landsat 8-derived LST m.ps from.100(30 m.resolution down to 2–4 m.with the use of the m.ltiple Adaptive Regression Splines(m.RS)m.dels coupled with very high resolution auxiliary data derived from.hyperspectral aerial im.gery and large-scale topographic *** applied the m.thod to four Landsat 8 scenes,two collected in sum.er and two in winter,for three British towns collectively representing a variety of urban *** used several spectral indices as well as fractional coverage of water and paved surfaces as LST predictors,and applied a novel m.thod for the correction of tem.oral m.sm.tch between spectral indices derived from.aerial and satellite im.gery captured at different dates,allowing for the application of the downscaling m.thod for m.ltiple dates without the need for repeating the aerial *** results suggest that the m.thod perform.d well for the sum.er dates,achieving Rm.E of 1.40–1.83 K prior to and 0.76–1.21 K after correction for *** conclude that the m.RS m.dels,by addressing the non-linear relationship of LST at coarse and fine spatial resolutions,can be successfully applied to produce high resolution LST m.ps suitable for studies of urban therm.l environm.nt at local scales.

关键词： Land surface tem.erature downscaling urban m.ltivariate adaptive regression splines rem.te sensing

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