简介：ThegeologicalfeaturesoftheLongshanAu-Sbdepositsaresystematicallydescribed.Mineralizationconditions,sourcesoforematerialsandmetallogeneticmechanismarealsoanalysedaccordingtosulfur,oxygenisotopecomposition,pyritetypomorphicfeaturesandfluidinclusionthermometrydating,Theresultsshowthatitisasedimentarymetamophichydrothermaldeposit.

简介：1.IntroductionInrecentyears,theproblemaboutthetectonic-meta1logcncsjshasbeennotieedbymanygeolo-gists’Aboutmoretbantcnyearsago,ProfessorCbcnGuodaproposcdtbcconeeptionoftectonic-met-allogenesis’AndProfessotHuangRuihua(1989,1990)paidgrcatattcntiontotheinitiativeofstructurcsactingonthemctallogencticproe

简介：InNanlin,alargenumberofPb-ZndcpositsandSbdcpositsincludingtheworldfamousgiantSbdepositcalledXikuangshanmineareDevoniancarbonaterock-liosted,Ourjnvcstigationsuggcststhatmanyofthcscdcpositswercmineraljzcdbyorc-bcaringgroundwater.IMajorProoIsofOre-BearingGroundwatcrMincralisationTherearcmanyproofiofgro

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.