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85220112ACTAGEOLOGICASINICAVol.85No.2Feb.2011:(1212010733803)!(1212010881403):20091226;:20101106;::,,1967,,,:330030,938;Email:shenghua9567@163.comUPb曹圣华1,2),唐峰林2),黄新曙2),邱文江2),袁振国2)1),,100083;2),,330030:,KAr63.6Ma84.7MaUPb,206Pb/238U232.7∀0.6Ma219.6∀1.5Ma,,,,:UPb;;;,,(Carteretal.,2001),(,2003;,2007),,(,2004),!!,(,2004),3:;;!,,,KAr,,SHRIMPUPb(,2005;,2008;,2009;,2009),(130~165Ma),,UPb,UPb(232.7∀0.6Ma),KAr(63.6Ma84.7Ma),120111Fig.1GeologicalsketchmapoftheGaojiashandepositinthenorthernofWuyishan1!;2!;3!;4!;5!;6!;7!!;8!;9!;10!;11!1!Graniteprphyrite;2!monzonitegranite;3!biotitegranite;4!quartzdioriticporphyrite;5!quartzsyeniticporphyry;6!Jurassicclasstic;7!Carboniferous-Permianclassticcarboate;8!Qingbaikoumetamonphose;9!coppermoybdicbody;10!fault;11!samplelocalities,20km,15km2!4(),(1),,2082:UPb,,,,,##,,,,,()2,,NENW,,,1.2km2,,,,,30∃~50∃,(15%30mm),2.1:SiO274.24%,Na2O+K2O7.85%,,,(30%)K2ONa2O,Al2O314.49%,,FeO+Fe2O3+MgO1.24%,,DI90.73,,:Cr51%10-6,Pb37.6%10-6,Li100%10-6,1.5~2Be2.6%10-6,V12%10-6,Yb0.8%10-6,Ba104%10-6,Sn2.3%10-6,Cu13.52%10-6,(,2005):(1),177.75%10-6,73(164.3%10-6)(236.23%10-6),Ce/Y(4.79),(132.37%10-6),Ce/Y(0.75),,(2)(2),,,2(,2005)Fig.2REEdistributionpatternofGaojiashangranitoids(afterZhouXueguietal.,2005)(3)Eu0.7(),0.88,(0.83),2.2(2005),18O+6.91&~+8.33&,(18O+5.5&~10&);D-60.2&~-80.9&,(-50&~-80&)(Tayloretal.,1985)34S2.0&~6.3&,4.8&,4.3,,,(,2005),,,,,(),2092011,,3UPb3.1(1)(PD002),3UPbFig.3ZirconUPbconcordiadiagramoftheGaojiashanintrusiverocks:,,0.5km2,,0.2~0.6mm,8%,,49%~80%,,0.1~0.2mm,:,,,,30%,1~5mm,5mm,,,,5.03,K2O/Na2O=1.55,3.2,,;206Pb238U,VG354,Pb0.050ng,U0.002ng1,33.313,(D50421)3206Pb/238U207Pb/235U207Pb/206Pb220.7Ma220.6Ma219.44Ma,1Ma,;4206Pb/238U227.0∀1.7Ma,,1~3206Pb/238U218.5Ma219.2Ma220.7Ma,,,1~3219.6∀1.5Ma(D60503)1~3206Pb/238U232.0Ma232.7Ma232.8Ma,,232.7∀0.6Ma4232.7∀0.6Ma,,,,,,;,1∋25,119.9km2,23,(UPb255∀36Ma),(KAr230.7Ma)2102:UPb1UPbTable1ZirconUPbisotopiccompositionsoftheGaojiashangranitoidsU(g)Pb(g)(ng)(Ma)206Pb/204Pb208Pb/206Pb206Pb/238U207Pb/235U207Pb/206Pb206Pb/238U207Pb/235U207Pb/206PbD504211322160.0167760.51130.03447(47)0.2353(452)0.04951(901)218.5214.6172.22305150.0187060.46880.03459(40)0.2293(490)0.04808(976)219.2209.6103.33227120.0392640.45580.03483(38)0.2427(408)0.05053(798)220.7220.6219.44585290.00554110.57800.03583(27)0.2446(249)0.04950(475)227.0222.2171.8D6050311132750.4801560.52460.03664(24)0.2614(147)0.05173(273)232.0235.8273.721096720.4801650.51480.03675(33)0.2502(139)0.04938(259)232.7226.8166.031024710.5501380.50210.03678(12)0.2498(111)0.04927(207)232.8226.4160.6:UPb,(;)(206Pb/204Pb=17.91∀1,207Pb/204Pb=15.55∀0.5,208Pb/204Pb=37.71∀1.5)206Pb/204Pb(Pb=0.050ng,U=0.002ng)2!,:0.03787(46)0.03787∀0.00046(2!),-,,,,,,,,,219.6∀1.5Ma232.7∀0.6Ma,13Ma,,(),,232.7∀0.6Ma,,,,,WSnMoCuAu,!!!!,(,2003;,2008),.2002.1∋25..1984.1∋5.,,,.2003..,9(4):520~535.,,,.2005.SIMSUPb.,11(3):383~389.,,,.2007..,53(2):207~216.,,,.2008..,82(7):865~872.,,.2004..,11(1):237~247..2008..,1~140.2112011.2009..,1~162.,,,.2009..,83(6):791~199.,,,.2004.UPb.,78(3):352~358..2003..,9(4):556~565.,,.2005..,26(1):27~32.CarterA,RoquesD,BristowC,KinnyP.2001.UnderstandingMesozoicaccretioninSoutheastAsia:significanceofTriassicthermotectonism(Indosinianorogeny)inVietnam.Geology,29:211~214.CharacteristicsandZirconUPbGeochronologyofMetallogenicGranitoidsintheGaojiashanCuMoDeposits,NorthernWuyishan,JiangxiProvinceCAOShenghua1,2),TANGFenglin2),HUANGXinshu2),QIUWenjiang2),YUANZhenguo2)1)FacultyofEarthScienceandResource,ChinaUniversityofGeosciences,Beijing,100083;2)GeologicalSurveyofJiangxiProvince,Nanchang,330030AbstractGaojiashancopperandmolybdenumdepositsinthenorthernWuyiShanregion,Jiangxiprovince,istectonicallylocatedonthesouthernmarginofthePingxiangGangfengfaultbelt,thecollisionalsuturebetweenYantzeplateformtothenorthandHuaxiaplateformtothesouth.TheKArdatingagesbypreviousstudiesfororthophyreandgraniteporphyryrelatedtomineralizationare63.6Maand84.7Ma,respectively.PrecisezirconUPbdatingwascarriedoutontheorthophyre,anddioriteporphyryintrudingorthophyreandgraniteporphyryintheGaojiashandeposits,andyieldsthe206Pb/238Uagesof232.7∀0.6Ma219.6∀1.5Ma,suggestinganageofIndoChinaepoch.Theanalysisofgeochemicalcharacteristicsandstableisotopeof34Sand18OinthisstudyindicatethattheoreformingmaterialandfluidoftheGaojiashanCuModepositderivedfromalkalirichmagmaactivityduringtheIndoChineseepoch.Therefore,theageoftheUPbdatingcanreflecttheoreformingageindirectlyandprovidenewinformationonthemineralizationinthisareaduringtheIndoChineseepoch.Keywords:zirconUPbdating;metallogenicgranitoids;Gaojiashan;northernWuyiShan212