滇西腾冲大硐厂铜_铅_锌矿床的辉钼矿Re_Os同位素定年

2005MINERALDEPOSITS246:0258-7106(2005)06-0663-06--Re-OsX1,2,3,4,5,6(1,100037;2,100037;3,050031;4,671000;5,671000;6,100037),--,-Re-Os,(118.02.4)Ma143112Ma,,;Re-Os;;;--;:P618.41;P618.42;P618.43:A2000km2,()(),,-(),-(,1991;,1995),(,1987;,1989;1991;,1993;,1993),--()--,,,wPb4.47%,wZn3.8%,wPb1.83%,wZn3.50%,wCu0.38%0.78%,wZn75%,-,,--(),,-Re-Os,-1(1),NS,NE,,,;,;,;,;,;-,X973(2002CB412600),,1964,,2004-12-06;2005-10-28©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,1991):1;2;3;4;5;6;7;8;9;10;11Fig.1SchematicgeologicalmapofTengchongareainwesternYunnan,showingthedistributionofmineralresourcesOredeposits:1Lailishantindeposit;2Laopingshantindeposit;3Baihuanaorareelementsandrareearthelementsdeposit;4Tiejiaoshantungsten-tindeposit;5Xiaolonghetindeposit;6Tongchangshancopper-lead-zincdeposit;7Diantanirondeposit;8Laochanpingzicopper-lead-zincdeposit;9Hongyantoulead-zincdeposit;10Dadongchangcopper-lead-zincdeposit;11Shidongbalead-zincdeposit4662005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,1991):,,,-();,,-;,(),2----,,--,2----,;--(C/P),,,C/P,,--,,,,,,-,--,(2)NE,,21;2;3;4;5;6;7;8;9Fig.2SchematicgeologicalmapoftheDadongchangcopper-lead-zincdepositinTengchongarea,westernYunnan1Quaternary;2Permianlimestone;3Carboniferousclasticrocks;4Graniteporphyry;5Quartzporphyry;6Dioriteporphyrite;7Skarn;8Orebody;9Faults,,1400m,100400m,,C/P,,500m,3050m,,50320m,220m,,,,,C/P,,1000,110m566246:--Re-Os©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Shireyetal.,1995;Smoliaretal.,1996;,1994;2001;Duetal.,2001),3.1,Carius,,-50-80,Carius,185Re190OsCarius,2mlc(HCl)=10mol/lHCl6mlc(HNO3)=16mol/lHNO3,Carius,,,230,10h,Carius,40ml3.210511050min,10mlOsO4,ICP-MS,50ml3.3,,,,10mlc(NaOH)=5mol/lNaOH,,120mlTeflon,10ml,,2mlc(NaOH)=5mol/lNaOH,2min,,,100ml2ml,50,,HNO3,2%ICP-MS3.4TJATJAPQExCellICP-MSRe:185187,190Os;Os:186187188189190192,185Re185Os1pg,ReOs,,ICP-MSNTI-MS,4--5Re-Os1Re(418.9g/g,11.9g/g)187Re/187Os1--Re-OsTable1ReandOscontentsandmodelagesofmolybdenitefromtheHonggouyancopperdepositinTengchongarea,westernYunnanm/gRe/(gg-1)187Re/(gg-1)187Os/(ngg-1)t/MaHGY1-30.0501711.1(0.1)6.9(0.1)14.1(0.1)121.8(2.0)HGY20.030018.9(0.2)11.9(0.1)23.8(0.4)120.4(2.5)HGY30.0413416.1(0.2)10.1(0.1)20.2(0.2)120.1(2.1)HGY40.059289.4(0.1)5.9(0.1)12.4(0.1)125.9(2.1)HGY50.123304.0(0.05)2.5(0.03)5.5(0.05)121.8(2.1):6662005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(0.45450.5),Re-Os5(120.12.1)(125.92.1)Ma,(MSWD=1.4)(3),,187Os0.580.2,187Re1.66610-11a-1,Re-Os(118.02.4)Ma3Re-OsFig.3Re-OsisochronageofmolybdenitefromtheHonggouyancopperdepositinTengchongarea,westernYunnan5143112Ma,87Sr/86Sr0.70840.7139,,Rb-Sr117Ma,Rb-Sr127Ma(,1991),,(118.02.4)Ma(,1991)127Ma9Ma,,--,C/P,--,,,,(,2003a;2003b),Cu-Pb-Zn-(Sn)Sn-W-Be,Sn-WSn-W(,1991),(2004),21Ma(Harrisonetal.,1992),,,,(Sr)(,1993)C/P,-,,-()6(1)-()(-)Re-Os,(118.02.4)Ma,(2)117127Ma,--,(3)--,,,,ReferencesChenJS,LinWXandChenLZ.1991.Seriesandunitresearchontin-bearinggranitesofTengchong-Lianghearea[J].Geol.Yunnan,10(3):241289(inChinesewithEnglishabstract).DuAD,HeHLandYinWN,etal.1994.ThestudyontheanalyticalmethodsofRe-Osageformolybdenites[J].ActaGeologicaSinica,68(4):339347(inChinesewithEnglishabstract).DuAD,WangSX,SunDZ,etal.2001.PreciseRe-OsdatingofmolybdeniteusingCariustube,NTIMSandICPMS[A].In:Piestrzynski,etal,ed.MineralDepositsatthe21stCentury[C].405407.HarrisonTM,CopelandP,KiddWSF,etal.1992.RaisingTibet766246:--Re-Os©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[J].Sci.,255:16631660.HouZQ,QuXM,WangSX,etal.2003a.Re-OsagesofmolybdeniteintheGangdeseporphyrycopperbeltinsouthTibet:Durationofmineralizationandapplicationofthedynamicsetting[J].Sci.inChina(SeriesD),33:509618(inChinese).HouZQ,MoXX,GaoYF,etal.2003b.Adakitie,apossiblehostrockforporphyrycopperdeposits:AcasestudyofporphyrycopperbeltsinTibetanPlateauandinnorthernChile[J].MineralDe2posits,21(1):112(inChinesewithEnglishabstract).HouZQ,MengXJ,QuXM,etal.2004.Gangdiseadakiticporphyrycop2perbeltsinTibet:Petrogenesisandtectoinccontrol[J].ActaPetrologicSinica,20(2):239248(inChinesewithEnglishabstract).LiuZQ,LiXZ,YeQT,etal.1993.Dividingoftectono-magmaticbeltsanddistributionoftheoredepositsinSanjingregion[M].Beijing:Ge2ol.Pub.House.1243(inChinesewithEnglishabstract).LuoJL.1991.GranitoidsrelatedtowesternYunnan(Dianxi)tinde2positsandtheirmetallization[J].MineralDeposits,10(1):8196(inChinesewithEnglishabstract).LouJL,YangYH,ZhaoZetal.1995.EvolutionofTethysandmetallogenyofmajororedepositsinwesternYunnan[M].Beijing:Geol.Pub.House.1180(inChinesewithEnglishabstract).LBX,WangZ,ZhangND,etal.1993.Granitoidsandmineraliza2tioninSanjingregion[M].Beijing:Geol.Pub.House.1328(inChinesewithEnglishabstract).MaoJW,ZhangSLandRossiP.1987.Sn-bearinggranitesofTeng2chong,YunnanProvince,andtherelationshipbetweenmineraliza2tion[J].ActaPetrdogicaSinica,3241(inChinesewithEngli