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1、維普資訊http://www.cqvip.com1000-0569／2006／022(04)一1040-48ActaPetrologicaSinica巖石學報金頂?shù)V床古元古鋯石SHRIMP年齡的發(fā)現(xiàn)及其地質意義修群業(yè)，高蘭王安建劉俊來曹殿華范世家翟云峰XIUQunYe．一，GA0Lan，WANGAnJian，LIUJunLai4，CA0DianHua2，F(xiàn)ANShiJiaandZHAIYunFeng41．核工業(yè)北京地質研究院，北京1000292．中國地質科學院礦產資源研究所，北京1000373．中國地質科學院，北京000374．中國地質大學(
2、北京)，北京1000831．BeijingresearchInstitueofUraniumgeology，Beijing1000292．Instituteofmineralresources，ChineseAcademyofGeologicalSciences．Beng1000373．ChineseAcademyofGeologicalSciences．Beijing1000374．ChinaUniversityofgeosciences．Beqing1000832005—12—20收稿．2006-02—24改回．XiuQY。GaoL，Wa
3、ngAJ，LiuJL，CaoDH，F(xiàn)anSJandZhaiYF．2006．DiscoveryofPlaeoproterozoiczirconSHRIMPagefromJindingdepositanditsgeologicalimplications．ActaeetrologicaSinica，22(4)：1040—1048AbstractJindingsuperlargedepositlocatedinthenorthernpartofLanpingBasin，westernYunnanProvince．Ithasbeenstudiedfo
4、rmorethan20years，andalotofgeneticmodelswereproposedsuchasstrataboundtype，synsedimentation—latereformationandmantle．crustcompoundmineralization．Butsomeelementarygeologicalproblemssuchassomeofthewal1．rockagesandthestructuresthatconstrainedorebodieshavebeensuspendedtillnow．The
5、seembarrassedtheexplanationofthegenesisaboutJindingdepositandthetectonicorcrustalevolutionofThree·River(Nujiang，LancangjiangandJinshajiangrivers)orogenicbelt．Forthesereasons，thispaperselectedsomezirconsfromthewal1．roekstodiscussthetectonicsetting．Basedoncrystalfeaturesandsh
6、apesofthezircons．whichweredirentfromthenormalweatheredzirconsinsandstones．thewal1．rocksmustbenotfarwheretheirsourcerocksformedAccordingtotheprocessofzircondating，4groupofisotopicageswereobtainedbySHRIMPIIinBeijingIonMicroprobeCenter．Theyare240Ma．415Ma．820Maand1800～2O0oMa．Th
7、esesuggestedthatthePb．Znmetallizationagewasyoungerthan240Ma．Furthermore，anumberofPlaeoprotozoicages(1910Ma，1867Ma，2021Ma，2487Ma)weremoresignificanceingeologicalstudies．First．itindicatedthatthesourcerocksofLanpingbasincontainedsomePrecambrianages．TheseimpliedthatthePrecambri
8、anbasementofYangtzePlatecouldspreadtoLancanjiangriver．Second，theseisotopicagessuge
