简介：Inrecent20years,becauseofthefindingofmanylarge-superlargegolddeposits,werenewthetheoriesforprospectingandgainmanythingsandconceptions.

简介：这份报纸处理从Hubin弹簧射出的气体的geochemical特征。Hubin弹簧地区，一个强壮的热排放地区，是在Tianchi火山口湖的北方边的locatedd。与不明确的爆发日期一起的很年轻的存款在Tianwenfeng的最高的区域上被发现，它可能在最近的爆发或千年爆发之一被形成了。从Hubin弹簧学习射出的气体的地球化学特征理解Tianchi火山的活动具有意义。系统地取样并且分析从Hubin弹簧射出并且讨论了他们的地球化学特征的气体的这份报纸。结果证明有深导出的气体的一个高内容，例如在Hubin弹簧地区的CO2，他，CH4和Ar。同位素的比率他躺在4之间。18和5。95Ra。平均披风导出从^4He/2^20Ne比率计算的煤气的内容并且他内容到达67.1%。Hubin触发的所有这些表演位于在高紧张和大规模释放的深气体的一条特殊的带。氦同位素的空间分发被凹度描绘，证明这个特殊区域可能与暴烈的大厦有关。释放气体从Tianchi火山代表最近的爆发的剩余气体样品，是高度可能的。然而，更多的详细研究被要求。

简介：Theisotopiccompositionofdissolvedinorganiccarbon(DIC)inestuarineenvironmentshasbeenstudiedforitssignificantroleindeterminingtheisotopiccompositionofinorganic/organicmatteranditsapplicationstothestudyofvariousnaturalprocesses.Inthispaper,basedonthestableisotopegeochemicalcharacteristicsofdissolvedinorganiccarbonintheJiulongRiverEstuary,thefollowingconclusionsaredrawn:(1)δ13CDICvaluesaremainlycontrolledbythemixingratiooffreshwaterandseawater;(2)δ13Cphytoplanktonvaluesarelinearlyrelatedtotheδ13CDICvalues;(3)δ13CPOMvaluesfortheJiulongRiverEstuaryareaffectedbyanthropogenicpollutionsignificantly;and(4)thecomprehensiveanalysisofδ13Cphytoplankton,δ13CPOMandδ13CDICshowsthatalongwithincreasingsalinity,theproportionofPOMderivedfromthedegradationofphytoplanktonsgraduallyincreases.

简介：IthasbeenatraditiontoorganizeverysuccessfulUNESCOPostgraduateCoursesonGeochemicalProspectingMethodsintheformerCzechoslovakiafrommid70's.Thefirstcertificatedcourse--GEOCHIMPRAHAUNESCO1975waslaunchedonSeptember5,1975andlastedtillOctober25,1975.SincethattimethiscoursehasbeenorganizedbiannuallybytheCzechGeologicalSurveyinPraguetogetherwiththeDionyzSturGeologicalSurveyinBratislavaandsponsoredbytheDivisionofEarthSciences(UNESCO/Paris)andtheInternationalAssociationofGeochemistryandCosmochemistry(IAGS).Thecoursewasspecializedonboththeoreticalandpracticaltraininginclassicalgeochemicalprospectingmethods.AteamofinternationallyexperiencedgeoscientistsasDrs.J.Pokorny,F.Mma,J.Manour,V.LomozovaZ.Sulcek,I.Rubeska,A.Spackova,V.Sixta,J.Juna,J.Veselu,J.Dornicandothers,co-ordinatedbyDr.ZdenekPacalfromtheCzechGeologicalSurveyinPraguehassoonearnedhighinternationalreputationandtheGEOCHIMCSSRUNESCOPostgraduateCoursedevelopedintooneofthemostsuccessfulPostgraduateTrainingProgrammesofUNESCO.

简介：TheNandan-Hechimetallogeneticbeltisthemostimportanttin-polymetallicproducingdistrictinChina,andisthelocationoftheDachangsuper-largetindeposit.Basedonthedetailedfieldinvestigationandisotopicdata,thestagesofmagmaticactivityintheNandan-Hechimetallogeneticbelthavebeenlinedoutinthispaper.Throughthestudyaboutthegeochemicalcharacteristicsofdifferentgranites,andbyusingω(Al2O3)-ω(SiO2),ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2),AFM,ACFandRb-Yb+Ta,Rb-Y+Nb,Ta-Yb,Nb-Ydiscriminationdiagramsincombinationwithregionalgeologicalsettinganalysis,theauthorscarriedoutanalysesaboutthestructuralenvironmentfortheformationofthegranites,anddiscussedthestructuralenvironmentanddynamicsettingforthelargescalemineralizationinthisarea.OurstudyindicatesthatthemajorityofthegranitesinNandan-HechimetallogeneticbeltbelongtothePOGtype,whilethelaterstagealaskitebelongstotheRRG+CEUGtype.Thegraniteswereformedatthestageofstructuraltransformationfrompostorogenicphasetointraplatesetting.Butthemajorstructuralenvironmentischaracterizedbysteadyregionalextension.Theformationageforthegranitescoincideswiththetimeforthistransformation,andthistranslationenvironmentisfavoredforlarge-scalemetallogenesis.

简介：CO2富有的冷弹簧在Wudalianchi发生在活跃火山附近()，东北中国。弹簧富于CO2，与HCO3吗？作为占优势的阴离子并且提高了全部的溶解固体(TDS)的内容(>1000mg/L)，Fe2+(>20mg/L)，Sr(>1mg/L)，并且溶解Si(>20mg/L)。弹簧的逃离并且溶解的气体的作文是类似的。在在Wudalianchi的矿泉的逃离的气体和溶解气体的13C价值变化从?8.77到?4.53并且?8.24到?5.26当18O价值变化从时?10.68到?7.65并且?10.30到?8.84，分别地在弹簧显示逃离的气体和溶解气体的CO2的一样的上面的披风起源。碳和氧同位素分别和water-CO2交换在地下水流动的过程是弱的。4He内容超过5000

简介：Geochemical和从北华南海的Baiyun深海的区域为钻的沉积标明日期数据的由岩屑形成的锆石U-Pb从渐新世表明沉积来源的一个变化到中新世。裂缝前的锆石年龄始新世序列与各种各样的山峰价值到Yanshanian年龄被统治(为U1435和L21的110-115妈；为H1的150妈)，从先存在的中生代magmatic带显示本地沉积供应。为在盆的北部分的渐新世沉积，稀土元素元素显示出不同分发特征，显示来自paleo-Zhujiang河(珀尔河)的沉积供应，当也在井X28由更低的渐新世阶层的多模式的锆石年龄系列证实了。由对比，一个积极Eu异例从盆的西方、南部的部分描绘沉积，显示到基本暴烈的岩石材料的从中介的潜在的起源。在渐新世的结束的Baiyun运动在深海的区域贡献了大规模沉淀，导致加深在盆的depositional环境并且另外一向北方大陆人架裂缝撤退。作为结果，从井X28，L13，和L21的上面的渐新世阶层的所有由岩屑形成的锆石年龄分享类似的分布，暗示象Zhujiang河一样的普通来源的可能的控制。在期间中新世而在北区域的沉积主要从Zhujiang河被采购，在南部的深海的区域的三角洲，和那些被基本暴烈的活动继续影响，Dongsha高举能作为主要来源作出贡献到东方区域。

简介：这研究的目的是估计在印度的东南的海岸在Tirumalairajan河河口在10表面沉积选择重金属(Fe，Mn，Cu，Zn，Pb，Cr，公司和Ni)划分的化学药品。一种五步的顺序的抽取技术被用来估计重金属的环境地位。大多数金属被认为由于在重金属的剩余部分的高可获得性不动。Tirumalairajan河河口的沉积没被重金属弄脏，并且他们没提出任何高生态的风险。重金属的季节的变化比在季风季节在夏天是稍微更高的。因素分析也被执行与沙，淤泥，泥土，有机物，pH，咸度和另外的金属在不同部分理解金属的协会。在Q模式和R模式簇分析之间的关系为在两个季节识别污染层次是有用的。重金属的丰富与地球表面形成学、人为的来源一起是相关的，这被证明。在沉积的全部的金属集中的信息不为在环境估计金属行为是足够的，但是顺序的抽取技术在估计污染沉积的环境影响是更有效的。

简介：HavingstudiedthebiomarkercompositionandmaturityofdissolvedhydrocarbonsfromOrdovicianformationwaters,theauthorspresentedmoleculargeochemicalevidenceforthecontroversialoriginofnaturalgasesincentralOrdosBasin.ThedissolvedhydrocarbonsinWellShan12andWellShan78arerelativelyhighinabundanceoftricylicterpane,pregnaneseriesanddibenzothiopheneseriesandlowinPr/Ph(＜2)andhopane/steraneratios,indicatingthesourceinputofmarinecarbonates.Incontrast,thedissolvedhydrocarbonsinWellShan81arefreefromtricyclicterpaneandpregnaneseries,withtracedibenzothiopheneseriesandhighPr/Ph(3.27)andhigherhopane/steraneratios,whicharethetypicalfeaturesofterrestrialorganicmatter.Furthermore,WellShan37andWellShan34arebetweenthetwosituations,havingamixedsourceofmarinecarbonateandterrestrialorganicmatter.Thematurityofbiomarkersalsosupportstheabovesuggestions.Theseresultsareconsistentwiththegeologicalbackgroundandsourcerockdistributioninthisregion.

简介：健全生产的沙的主要元素作文第一次和稀土元素的元素(REE)和另外的选择元素被报导。在从在日本的Miyagi和Tottori的沙滩沙的稀土元素的元素集中被决定由联合正式就职，氩血浆spectrometry(ICPMS)到相对父母岩石描绘健全生产、沉默的沙的REE。健全生产的沙沙滩是很普通的并且在整个在在Miyagi的Japan:five沙滩并且2在区域与另外的沉默的沙沙滩在Tottori被选择。从Miyagi和Tottori的健全生产的沙和沉默的沙样品包含超过60wt%ofSiO_2并且主要由石英和长石组成。Miyagi沙样品被轻REE丰富和类似于本地来源沙岩的那些的完全使球粒状陨石正常化的模式描绘。然而，从在Miyagi的Miyatojima的所有沙样品显示出积极Eu异例，没在另外的沙显示出的一个典型特征从Miyagi取样。Tottori沙样品被高REE内容和显著积极Eu异例也描绘。包含lowerREE内容的沙由于高石英和长石内容。Miyatojima沙样品和Tottori沙样品有高REE内容并且由于长石的存在显示出显著积极Eu异例。最好的结果作为健全生产的沙和silents的类似的一项措施地质的方法和PrincipalComponent分析(PCA)用所有被获得并且。健全生产的沙和沉默的沙之间的差别从PCA结果被获得。

简介：包括锆石U-Pb年龄，Hf同位素的作文，学生和踪迹与数据集在西方Tianshan为Nalati山区域(NMR)包含数据的合成古生代的侵入的元素被介绍改进地区性的geodynamic的理解进化。在NMR的古生代的恼人的岩石能基于按年代先后、geo化学的数据被分类进四个范畴：480

简介：Geochemical特征上面二叠(P_2)大陆人边缘的弧火山岩被描述，它最近在XiaodingxiandZangli的区域附近基于Yunxian-Lincang花岗石的东方方面以岩石集合，石油化学，REE，痕量元素，Pb同位素，大地构造的环境等等。火山岩集合被basalt-andesite-dacite统治，与次要的粗面岩andecite-trachyte；火山岩系列被计算碱的系列支配，与次要的tholleiite系列和碱的系列岩石；火山岩被高Al_2O_3和低TiO_2描绘，与显示出极其强壮的极性的K_2Ocontents；REE分发模式被LREEenrichment和使权利倾向的类型描绘；痕量元素和大阳离子元素高度被充实，Ti和Cr被弄空，并且P和Nb部分被弄空；Pb作文具有Gondwanatype；石油化学的点主要在岛弧火山岩的地以内掉落，有数据的设计的矛盾大陆人把边缘的火山岩指向南方Lancangjiang带和北方Lancangjiang带的南部的片断。这个大陆人边缘的弧火山岩带和在Changning-Menglian带的海洋山脉和海洋岛火山岩andophiolites，组成海洋山脉火山岩，在对分布式的ophiolite-arcrock-magmatic岩石带，显示Lancangjiang海洋的外壳向东代替ducted。这结果在在Lancangjiang带抑制thepaleo-Tethys的进化是很重要的。

简介：InthispaperanintegratedgeologicalandgeochemicalcomparisonismadeofCarlin-typeandCarlin-like-typegolddepositsintheregionofSouthQinlingwiththeirassociatedhydro-thermalsedimentarylead-zincdeposits,theCarlin-typedepositsintheYunnan-Guizhou-Guan-gxigoldtriangle,China,theCarlingolddeposits,Carlin,westernUnitedStates,andtheMu-runtau-typegolddepositsinUzbekistan.Thecomparativestudyindicatesthattheformationofthesedepositshasanintimatecouplingrelationwiththemechanismofthetectonicmovementofmodernplates.Therefore,thesedepositsbelongtothosethatwereformedintheorogenicstage.Theyhavethefollowingsimilarcharacteristics:theyareallsediment-hosted,occurinatectonicenvironmentofextensionalriftingnatureandshowthecharacteristicsofsyngeneticallymodifiedmineralization.Ontheotherhand,theyalsohavenoticeabledifferences:theyaredifferentinrespecttotheirtectonicsettings,associationandstructureoforogenicbeltsandcomplexityandstrengthofthemodifiedmineralization.Theregionaltectonicevolutionandextensivemineraliza-tioninorogenicbeltsaredifferentexpressionsofthesamecontinentaldynamicprocess.

简介：IthasbeenatraditiontoorganizeverysuccessfulUNESCOPostgraduateCoursesonGeochemicalProspectingMethodsintheformerCzechoslovakiafrommid70's.Thefirstcertificatedcourse-GEOCHIMPRAHAUNESCO1975waslaunchedonSeptember5,1975andlastedtillOctober25,1975.SincethattimethiscoursehasbeenorganizedbiannuallybytheCzechGeologicalSurveyinPraguetogetherwiththeDionyzSEtúrGeologicalSurveyinBratislavaandsponsoredbytheDivisionofEarthSciences(UNESCO/Paris)andtheInternationalAssociationofGeochemistryandCosmochemistry(IAGS).Thecoursewasspecializedonboththeoreticalandpracticaltraininginclassicalgeochemicalprospectingmethods.

简介：Evidenceforamantleand/orbasalticcomponentinKTboundarydistalejectaisapparentlyinconsistentwithejectionfromChicxulubCratersinceitislocatedon~35kmthickcontinentalcrust(DePaoloetal.,1983;Montanarietal.,1983;HildebrandandBoynton,1988,1990).Thisevidence,alongwithejectedterrestrialchromites(Oldsetal.,2016)suggesttheimpactsampledterrestrialmaficand/orultramafictargetrockswhicharenotknowntoexistintheChicxulubtargetarea.Possibleresolutionstotheparadoxare:1)theexistenceofanunmapped/unknownsutureinYucatanPlatformbasement,2)anadditionalsmallunmapped/unknownimpactsiteonoceaniclithosphere,or3)anadditionallargeimpactonoceaniclithosphereorcontinentalmargintransitionaltooceaniclithosphere.Thethirdhypothesisiselaboratedheresince:1)OphiolitesnearesttoChicxulubcraterarefoundinCubaandapparentlywereobductedinlatestCretaceous/earliestDaniantimes(García-Casco,2008),inconsistentwiththedocumentedEocenecollisionofCubawiththeBahamasplatform;and2)Cubahoststheworld’sthickestknownKTboundarydeposits(Iturralde-Vinent,1992;Kiyokawaetal.,2002;Tadaetal.,2003).Theseandgeometricconsiderationssuggestoceaniccrustanduppermantlerock,exposedasophioliteintheGreaterAntillesislandchain,markstherimofaroughly700kmdiameterimpactbasindeformedanddismemberedfromanoriginallycircularformbyatleast50millionyearsofleft-lateralsheardisplacementalongtheNorthAmerican-Caribbeantransformplateboundary.

简介：DuringtheEarly-MiddleProterozoicera,threemajorlithostratigraphicunitassociations,namelyHekou-Dahongshan,Dongchuan,andKunyang-HuiliGroups,wereestablishedforthemetamorphosedvolcanicsedimentaryrocksexposedinthesouthwesternYangtzeBlock(SWYB).Theintegrationofpetrology,geochemistryandgeochronologyconstrainstectonicframeworkandevolutionoftheSWYB,inwhichfoursetsofSHRIMPU-PbzirconageswereobtainedfromthevolcanicrocksinterbeddedwithintheMiddleProterozoicsuccessions:1800-1600Ma,1600-1300Ma,1300-1100Ma,and1100-1000Ma.Majorandtraceelementalanalysisindicatethatfourkeytectonicevolutionarystages,eachcoincidingwiththeaboveradiometricageset,oftheSWYBduringtheEarly-MiddleMesoproterozoic.TheSWYBwascharacterizedbyaneast-westerlytrendingriftintheHekou,Dongshan,andDongchuanareas,andseparatebasin-formingeventsduring1800-1600Maarid1600-1300Ma,respectively.IntheSWYB,anintracontinentalriftbasinandariftbasinoccurredintheCaiziyuan-MatangandLaowushanareas,respectivelyin1300-1100Maago.During1100-1000Ma,theSWYBwascharacterizedbytheclosureoftheCaiziyuan-Matangrift-oceanbasin,collisionbetweentheHuiliBlocksandKunyangBlocks,andpresenceofvolcanicaresintheTianbaoshanandFulingpenareas.Accordingly,theSWYBrepresentsanewbasinthatrecordstherelativelycompleteassemblyprocessoftheRodinaduringtheEarly-MiddleMesoproterozoicera.

简介：TherearefourtypesofmetamorphicrocksintheMarinwobofault,i.e,cataclasite,mylonite,mictositeandmigmatiticgranite,andtheformationoftheserocksisduetotheprogressivemetamorphismofthepyroclastics.ThefluidsplayaveryimportantroleinthemetamorphicprocessoftheserocksintheMarinwobofault,themostimportantfeatureisthatthefluidsnotonlyresultinthemigrationofthemajorelementsofthedeformationrocks,butalsoresultinthevolumelossofthedeformationrocksinthedeformationprocess.Thusthemigrationlawsofthemajorelementsindifferentstagesoftheprogressivemetamorphicprocessarediscussedaccordingtomassbalanceequations.Finally,thequantitativeanalysisofthemasslossandvolumelossofthedifferentrockstheinMarinwobofaultisdiscussedinthispaper.

简介：Thevolcano-sedimentarysuccessionaroundWadiZaghrainSinai,atthenorthernmostsegmentoftheArabianNubianShield,comprisesvolcanicrocksinterbeddedwithratherimmaturesediments.Thesuccessionisdominatedbyintermediatetosilicicvolcanicsofmedium-tohigh-Kcalc-alkalineaffinity.Itisdividedintotwounits,thelowerunitincludesintermediaterocksanddacitesinterbeddedwithgraywackes,semi-pelitesandpelitesandtoppedbypolymictconglomerates.Thisunitissubjectedtofoldingandregionalmetamorphism(uptogarnetzone)andisintrudedbyquartzdiorite-granodioriteinducing,locally,low-pressurecontactthermalmetamorphism.Theunmetamorphosedupperunitencompassesacidvolcanicsintercalatedwithlitharenite,sublithareniteandminorarenite.Therhyolitesofthisunitpertaintothehighlyfractionatedgranitesandarecharacterizedbyanagpaiticindex(NK/A)rangingfrom0.87to0.96.Theymayreflecteitherextensiveinteractionofsubduction-relatedmagmaswiththecontinentalcrustorachangeinthetectonicregime.Thepresentlithologicalandgeochemicalcharacteristicsofthestudiedsedimentstogetherwithavailablezirconagesindicateratherdistalprovenanceoftheirdetritus.Thisdetrituscomprisesfluvial-alluvialsedimentsaccumulatedintheintermontanebasins,whicharehalf-grabensortiltedfaultblocks.Thetectonicsettingofthedepositionalbasinsisactivecontinentalmarginandcontinentalislandarcs.GeochemicalpatternsoftheZaghravolcano-sedimentarysuccessionindicatetheircorrelationwiththeDokhanVolcanics-HammamatClasticssequenceoftheEasternDesertofEgypt.Also,theZaghravolcanicsdisplaygeochemicalsimilaritieswiththoseexposedinSinai,attheRutig,FeraniandIqnaShar’aareas.TheZaghrasuccessionisdatedasEdiacaranbutisnotrelatedeithertotheensimaticislandarcassemblageortotherift-relatedassemblageformedduringtheearlystagesofthebreak-upofRodiniaaspreviouslythought.

简介：TheregularvariationsinmagmaticactivitiesalongtheNorthwestPacificplatehavebeenlittlestudiedinspiteoftheirimportance.Inthiscontribution,systematicanalyseswereconductedontholeiiticbasaltsfromthreeOceanDrillingProgramsites（Sites304,1149,and801）,includingthepetrographicfeatures,majorandtraceelements,Ndisotopiccompositions,andmineralstructureandcompositionsofwholerocks.VolcanicrocksfromSites304,1149,and801belongtotholeiitesandexhibitdepletedlightrareearthelements（LREE）,largeionlithophileelementalcontents（LILE）,andrelativelydepletedNdisotopicratios（143Nd/144Nd=0.513139-0.513211）,similartothoseofnormalmid-oceanridgebasalts（N-MORB）.Comprehensivedataonmineralcompositions,whole-rockgeochemistry,andgeochronologydemonstratethataregularvariationtrendexistsinthenorth-southdirectionalongtheNorthwestPacificplate.The143Nd/144Ndvalues（0.513139-0.513211）andtrace-elementratiosforwholerocks（Sm/Th=15.35-30.00;Zr/Hf=28.53-35.76;Zr/Y=2.58-3.67;Th/La=0.04-0.06;Th/Y=0.33-0.70）,aswellasthetrace-elementratios（Zr/Hf,La/Yb,Ti/Zr）ofclinopyroxenesfromSites1149and801tholeiitesshowlargervariationscomparedtothosefromSite304tholeiites（143Nd/144Nd=0.513185-0.513195;Sm/Th=18.19-20.58;Zr/Hf=31.07-33.26;Zr/Y=2.62-3.03;Th/La=0.05-0.06;Th/Y=0.48-0.57）.MineralzoningtextureswereobviousintholeiitesfromSites1149and801butwererarelyobservedinSite304.Theseregularfeatureswerelikelyattributedtothedifferencesintheheterogeneityofthemagmasource,theprocessofmagmatieevolution,theplate-spreadingrate,andtheeffectiveandineffectivemixing.

简介：