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简介：Thermodynamicpropertiesoffluidsareessentialfortheunderstandingofthegeochemicalbehaviorofvariousprocesses,Thepaperintroducesthemostupdatedcomputermodelingandsimulationmethodsinthestudyofthermodynamicsofgeofluids,inclduingsemiempiricalmodels(suchasequationofstate)andmoleculardynamicsandMonteCarlosimulation.Awell-establishedsemi-empiricalmodelcaninterpolateandextrapolateexperimentaldataandyieldmuchphysicochemicalinformation.Computermodelingmayproduce'experimentaldata'yieldmuchphysicochemicalinformation.Computermodelingmayproduce'experimentaldata'evenunderexperimentallydifficultconditions.Theyprovideimportantmethodsforthestudyofgeologicalfluidsystemsonthequantitativebasis.

简介：Ananomalousisotopeeffectexistsinmanyheavyelementisotopesystems(e.g.,Sr,Gd,Zn,U).Thiseffectusedtobecalledthe‘‘odd–evenisotopeeffect’’becausetheoddmassnumberisotopesbehavedifferentlyfromtheevenmassnumberisotopes.Thismass-independentisotopefractionationdrivingforce,whichoriginatesfromthedifferenceintheground-stateelectronicenergiescausedbydifferencesinnuclearsizeandshape,iscurrentlydenotedasthenuclearfieldshifteffect(NFSE).ItisfoundthattheNFSEcandriveisotopefractionationofsomeheavyelements(e.g.,Hg,Tl,U)toanastonishingdegree,farmorethanthemagnitudecausedbytheconventionalmass-dependenteffect(MDE).Forlightelements,theMDEisthedominantfactorinisotopefractionation,whiletheNFSEisneglectable.Furthermore,theMDEandtheNFSEbothdecreaseastemperaturesincrease,thoughatdifferentrates.TheMDEdecreasesrapidlywithafactorof1/T2,whiletheNFSEdecreasesslowlywithafactorof1/T.Asaresult,evenathightemperatures,theNFSEisstillsignificantformanyheavyelementisotopesystems.Inthisreviewpaper,webeginwithanintroductionofthebasicconceptoftheNSFE,includingitshistoryandrecentprogress,andfollowwiththepotentialimplicationsoftheinclusionoftheNFSEintothekineticisotopefractionationeffect(KIE)andheavyisotopegeochronology.

简介：SomeAudepositsinsouthernAnhuiProvincehaverecentlybeenfoundtobecloselyassociatedwithLateMesozoicintrusions.TypicalexamplesincludetheHua-shahAu（Sb）depositandAudepositsatZhaojialing,Wuxi,andLiaojia.InordertounderstandthemechanismsthatledtheformationoftheseAudeposits,wemakedetailedreviewsonthegeologicalcharacteristicsoftheseAudeposits.Specifically,wepresentnewLA-ICP-MSzirconU-Pbdating,alongwithelementalandHfisotopicdatafromtheHuashanAu（Sb）deposit.OurdatasuggeststhattheHuashanore-relatedintrusionswereemplacedduringtheLateJurassicandEarlyCretaceousperiods（144-148Ma）.Theyarecharacterizedbyarc-magmafea-turesandhighoxygenfugacityandarerichininheritedzircons.ZirconU-PbagesandLu-HfisotopesfromintrusionssuggestthatProterozoicjuvenilelithosphereisthemainsourceoftheseintrusions.TheregionalgeologicalhistoryimpliesthatlithospherebeneathsouthernAnhuiwasproducedduringaProterozoicsubductionandwasfertilizedwithAu（Cu）intheprocess.Integratedwiththeresultsofpreviousstudies,weinferredthatLateMesozoicintrusionsformedbytheremeltingofthelithospherecouldprovidethemetalendowmentfortheAu-richdepositsinsouthernAnhui.