简介：CalculationsbasedontheavailablethermodynamicdataofAuCl2^-andAu(HS)2^-indicatethatAuCl2^-isresponsibleforthetransportandenrichmentofgoldduringthestageofpre-concentrationinthesourcebedwhileAu(HS)2^-isthemaingoldspeciesinvolvedintheformationofgolddepositsinresponsetohydrothermalreworking.Acidchloridesolutionswithαcl^->10°andsulfur-richsolutionswitha∑sinexcessof10^-2areheldasimportantcriteriaforgoldenrichmentinthesourcebedandfortheformationofgolddepositsbysubsequenthydrothermalevent,respectively.

简介：Spilite-keratophyreisakeymemberoftheShuangxiwuGroupvolcanicseriesinZhejiangProvince.PresentedinthispaperarethereliableSm-Ndinternalisochronage(1012±18Ma,∈Nd(T)=4.4±0.1)andwhole-rockRb-Srisochronage(972±40Ma,Isr=0.70327±8)obtainedforthefirsttimebytheauthors.FromtheavailableNd,SrandOisotopedatainconjunctionwiththemajorandtraceelementsdataitissuggestedthattheXiqiuspilite-keratophyreistheproductofisland-arcvolcanismduringthelateMiddleProterozoic.

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简介：TheJiangshan-Shaoxingfracturebelt(JSFB)isaLateProterozoicgeosutureduetoislandarc-continentcollisioninSouthChina,TheCathaysianBlock(CT),lyingonthesoutheastsideofJSFB,iscomposedofgreenschist-amphibolitecomplexesintheformofaseriesoftectonicflakes.OnthenorthwestsideofJSFB,whichislocatedintheborderareaofZheijiang,JiangxiandAhhhiprovinces(abbreviatedasZJP-JXP-AHP),aredistrbutedandophiolitesuiteandotherrocks,constitutingtheJiangnanancientislandarc(JN)onthesoutheastmarginoftheYangtzeBlock(YZ).ThecollisionbetweenJNandCTat-0.9GaagoledtothefoldingofJN.followedbytheintrusion(-0.9-0.8Gaago)ofmanydioriticandultramaficstitchingplutonsalongthefracturebelt.Asaresult,thebasicPrecambriantectonicframeworkofsoutheasternChinawasshaped.

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简介：碳和氢源於生物的气体的同位素的作文为它的产生小径和reservoiring特征的学习是很重要的。在这篇论文，在中国的源於生物的煤气的水库的形成小径和reservoiring特征以碳和氢被描述从10座源於生物的煤气的水库的31件煤气的样品的同位素的作文。学习表演氢这些源於生物的煤气的水库的同位素的作文能被划分成三间隔：δ>−200‰，−250‰<；δ<-−200‰和δ<−250‰。先进相信在新鲜的水是的大陆人的条件下面的源於生物的气体的主要产生小径醋性的发酵。我们的研究结果证明在海洋的外形的条件下面的源於生物的气体的产生小径是典型公司2-减小，源於生物的气体有重氢同位素的作文：它的δ价值比−200‰高；在大陆人外形的条件下面的源於生物的气体被一样的方法，而是它的氢也产生同位素的作文比简历，基因气体在典型海洋的外形状况下面产生了轻：−250‰<；δ<−200‰，δ价值可能与在古老的湖的水媒介的咸度有关。从Qaidam盆的相关数据，这能被看见源於生物的甲烷的同位素的作文有的氢有增加水的咸度的一样的变化趋势中等。有源於生物的煤气的水库，在大陆人外形的条件下面在过渡区域形成。这些煤气的水库是源于公司2-reduction和醋性的发酵，其形成可能与中等的古老的水和相对高的地热的坡度的非变体的咸度有关，盒子在Baoshan盆被遇到。在这些区域产生的源於生物的气体有轻氢同位素的作文：δ<−250‰，和相对重的碳同位素的作文。在碳之间有相当强壮的否定关联同位素的作文和氢同位素的作文。产生机制和碳的小径，和氢源於生物的气体的同位素的作文可以被用来查明从自然界的源於生物的煤气的样品是否具有�

简介：这篇论文在Guiyang的地表的土壤描述象Cu和Zn那样的重金属污染物质的环境联盟者geochemical特征，GuizhouProvince的首都的城市。在土壤和geochemical标准的重金属的基线集中被建立了在环境上区分自然或人工的影响。用统计上分析方法，我们在Guiyang(18.8mg/kg)建立了Cu的基线，土壤(超过68.4mg/kg)可以承受Cu污染。Zn的数据是46。3mg/kg并且112。0mg/kg。Geoaccumulation指数分析显示有sufferednon污染到的地表的土壤为38%，38%，和22%的Cu帐户为中间污染中间污染，并且仅仅对严重污染中间污染的2%between。承受了Zn的非污染tomid污染的地表的土壤占41%，50%，和7%为中间污染，并且仅仅2%betweenmid污染到严重污染。Cu污染的最大的度在Guiyang的surficials油是5.09。没为53承受Cu污染报道的地表的土壤。2%。Cu的全部的污染度是稍微超过零。Guiyang的地表的土壤因此承受了slightCu污染。Zn污染度的最大的价值是2。85在地表的土壤ofGuiyang。77。8%地表的土壤还没承受了任何Zn污染。Zn的全部的污染度是不到零。在Guiyang的地表的土壤因此从Zn的污染是免费的。

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简介：TheMazhuangshanarealiesinnortheasttoAqikekuduke,wherearedistributedin-termediate-acidrocks,whichwereformedintheMiddle-LateCarboniferousepoch.Themagmaticrocksareperaluminousandbelongtocalcareousseries.AllvaluesofACNK(1.03-2.12),ANK(1.67-2.93),SI(4.1-33),δ(0.71-4.82),La/∑REE(0.09-0.26)∑LREE/∑HREE(1.76-11.01),(La/Sm)N(1.60-6.35),(Sm/Nd)N(0.33-0.58),(La/Yb)N(4.7-12.1),LaN/Lux(5.9-11.8),(Ce/Yb)N(3.14-6.64),δEu(0.38-1.06),RbN/SrN(41-120)andSr(0.02-0.2)demonstratetheyvarywithD_I(45-90).S-Bdiagramalsoshowsthatthelithophileelementsareabundantinacidicmagmaticrocks,Moreover,itisconcludedthattheprimitivemagmaoriginatedfromasubductionzoneatthecontinentaledge,andunderwentfractionalcrystallizationandcontamination,thengeneratedthemagmaticrocks,Themulti-cationindex(R:3055-3993,R2:286-438)showsthattheprimitivemagmaoriginatedfromthemantle,Alltheseconclusionsarebeneficialforexploringgolddepositsinthearea.

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简介：Shallowfreshwaterbodiesinpeatareascouldbeanimportantcontributortogreenhousegasesintheatmosphere.Inthisstudy,thepartialpressureofCO2inthesurfacewateroftheDianshanLakewasinvestigatedinsituinAugust2011.TheaveragepCO2inthestudyareawas2300μatmandfluctuatedwithintherangeof989–5000μatm.pCO2showedareversetrendtothevariationsofpHandDOinthesurfacewateroftheDianshanLake.ThewatertoairdiffusionfluxofCO2oftheupstream,middlelakeanddownstreamwererespectively63,33and14mmol/m2/d.Onaverage,thediffusionfluxofCO2ofthewholelakewas31mmol/m2/d.Consequently,ourresultsshowthatduringthesamplingseason,theDianshanLakeappearstobeagreatsourceofCO2.ItisalsodemonstratedthatrespirationcouldbethedominantbiochemicalreactionintheDianshanLakeinsummer.

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简介：ThedifferentialenrichmentofgoldandarsenicobservedinAs-bearinghydrothermalgolddepositsinSouthwestGizhouisinducedbyvapor-liquidseparationinresponsetochangingphysico-chemicalconditionsduringthehydrothermalevolutionandisareflectionofthegeochemicalbehaviorofthetwoelements.

简介：ExtensivevolcanismisoneoftheimportantfeaturesofCenozoicgeologyinChina.Basedontemporal-spatialdistribution,thevolcanismwasassociatedwiththreemajordifferentgeologicalsettings:1)thecontinentalriftbasaltsinNortheastandNorthChina;2)thetension-faultbasaltsonthecontinentalmarginsofSoutheastChina;and3)thecollision-zonehigh-KvolcanicsintheQinghai-XizangPlateauanditsvicinities.Thecharacteristicsof'depletioninthesouthandenrichmentinthenorth'oftheChinacontinentalmantlearestronglysupportedbyisotopicevidence.TheCenozoiccontinentalcalcharacters,intothefollowinggeochemicalprovinces:1)thedepletedmantleinSouthChina;2)theprimarymantleinNortheastandNorthChina;3)thehybridandtransi-tionalmantleintheregionofShandong,Anhui,JiangsuandnorthernZhejiang;4)thedepletedmantlearoundtheBohaiBayandtheLowerLiaoheRiver;5)theK-metasomaticenrichedmantleinthenorthernpartofNortheastChina;and6)there-cycledenrichedmantleintheancientsubductionzoneintheQinghai-XizangPlateauanditssurround-ings.Thesegeochemicalcharacteristicsonaregionalscalemustbeareflectionofthenatureoflithosphereevolution.

简介：Sm-NdandRb-Srwhole-rockisochrondatingofthesamplesofcumulatedgabbro,diabaseandandesiticporphyritefromtheArmantaiophiolite,Xinjiang,yieldedtheagesof561±41(Ma(εNd(t)=6.1)and392±17Ma(87Sr/86Sr)i=0.7041],whichstandfortheagesofcreationandlatermetamorphismoftheophiolites,respectively,ThecreationenvironmentoftheArmantaiophiolitesseemstoaback-arcbasincausedbythesouthwardsubductionofthetheArmantaiophiloitesseemstoaback-arcbasincausedbythesouthwardsubductionofthepalaeo-AsiaOcean.

简介：Fluidinclusionstudiesof5golddepositsconnectedwithalkalinerocksshowthatquartzseparatedfromauriferousquartzveinscontainsabundantthree-phaseCO2-NaCl-H2Oinclusionsandtwo-phaseCO2-dominatedones,measuring5-20umindiameter,Homogenizationtemperaturesofthefluidinclusionsaremostlywithintherangeof150-300℃,andthesalinities,mainly0.2wt%-12wt%(NaCl),Goldmineralizationsoccurredatdepthsof1.4-2.8km,Themoststrikingcharacteroffluidcompositionisthatamongthecations,Na^+indominant,followedbyK^+,Ca^2+,amongtheanions,Cl^-isslightlyhigherthanSO4^2-,Intheevaporate,H2Oisdominant,followedbyCO2,ThepHvaluesaremainlywithintherangeof6.5-8.5,indicatingthattheore-formingsolutionsarealkalineinnature.Thehydrogenandoxygenisotopicratiosindicatethattheorefluidiscomposedmainlyofmagmaticwater.Withthedroppingoftemperatureintheorefluid,thecontentsofCO2decreasedwhilethesalinityincreased.TherelationsbetweenAuandothercomponentsoftheorefluidarediscussedinthepaper,anditisconcludedthatinthesedeposits,Chlorides,H2S,SiO2,CO2,etc.inthefluidallareinvolvedinthemigrationandconcentrationofAu.