玲珑金矿区成矿后花岗斑岩脉的锆石SHRIMPU_Pb年龄对胶北地体演化的

12220054(,;)EarthScienceFrontiers(ChinaUniversityofGeosciences,Beijing;PekingUniversity)Vol.12No.2Apr.2005SHRIMPU2Pb1,2,2,2,1,1,21.,1000832.,300170LIJun2jian1,2,LUOZhen2kuan2,LIUXiao2yang2,XUWei2dong1,CHENAn2shu1,21.SchoolofEarthSciencesandResources,ChinaUniversityofGeosciences,Beijing100083,China2.TianjinInstituteofGeologyandMineralResources,ChinaGeologicalSurvey,Tianjin300170,ChinaLIJun2jian,LUOZhen2kuan,LIUXiao2yang,etal.ConstraintstotheevolutionofJiaobeiterranefromSHRIMPU2Pbzircondataofpost2metallogenicgraniteporphyryveininLinglonggolddeposit,ShandongProvince,EastChina.EarthScienceFron2tiers,2005,12(2):3172323:20041030;:20041210:(200110200038,19991020218003);(2001DIB10056):(1962),,,,E2mail:[e-mail]:Thezirconsextractedfromapost2metallogenicgraniteporphyryveinintheLinglonggolddepositweredatedbyU2PbSHRIMPmethod.Anaverage206Pb/238Uageof11914Mawasobtainedfrommagmaticzircons,whereasagesrangingfrom3114to127Mawereobtainedfrominheritedzircons.Fromtheagesofin2heritedzircons,weproposethattheJiaobeiterranehasundergonethroughaphasesofcontinentalgrowthintheMiddleArchean,agranite2greenstoneterraneaccretionintheNeoarchean,sedimentationofkhondalitese2riesinthePaleoproterozoic,andtheformationofPenglaigroupintheNeoproterozoic.InthewholePalaeozoicEra,theterranewasinasteadystageofupliftanddenudation,withweakmagmaticactivityintheinnerpartsoftheterrane.IntheTriassicperiod,followingthecollisionbetweenNorth2ChinaandSouth2Chinacratons,theTanlufaultzonewasformed.InthelateTriassictothemiddleJurassicperiod,thestrongpost2collisioncompressionbetweenNorth2ChinaandSouth2ChinacratonsresultedincrustalthickeningalongthesouthernedgeoftheNorth2ChinacratonandtheintrusionofLinglongandBengbujinshangranites.InthemiddletolateJurassicperiod,owingtoalarge2scaleleft2lateraldisplacementofTanlufaultzone,theJiaobeiterranemovedtothepresentpositionfromtheeastofBengbu2Wuhearea.IntheearlyCretaceousperiod,theTanlufaultzoneexperiencedachangefromleft2lateralcompressiontoright2lateralextension,whichwasaccompaniedbytheintrusionofGuojialinggranite.InthemiddletolateCretaceousperiod,theTanlufaultzoneexperiencedalarge2scaleextensionwhichresultedintheformationofYishurift,Jiaolaibasin,dykeemplacementandthee2ruptionofvolcanicrocksoftheQingshanformationandmanygolddeposits.Keywords:granite2porphyryvein;SHRIMPU2Pbzircondating;Linglonggolddeposit;Jiaobeiterrane:SHRIMPU2Pb,206Pb/238U119.4Ma,,3114127Ma,;;;,,318,,,/(EarthScienceFrontiers)2005,12(2),,,,,,,,,,:;SHRIMP;;:P618.51;P597.3:A:10052321(2005)02031707,[1],[2],[3];,[4],,,,[5],,3,,,5,(),,1,:,NEE60,,,6080,cmm,mm,,[6][7](1,,),10855,,NE30,,,mm,mm(1,,),,,110000,,,m,m,,,,,,40%,,35mm,;,,,2SHRIMP(Lx253),,10kg,,,,,SHRIMP,,,,.110000.1988.,,,/(EarthScienceFrontiers)2005,12(2)3191Lx253SHRIMPU2PbTable1SHRIMPU2PbDataofzirconsinthegraniteporphyryvein(sampleLx253)w(U)/(gg-1)w(Th)/(gg-1)w(Th)/w(U)w(204Pb)/10-9f206/%N(207Pb)/N(206Pb)()N(208Pb)/N(206Pb)()N(206Pb)/N(238Th)()N(207Pb)/N(235U)()206Pb/238U/Ma()1.12021050.518449.80.0065690.20091610.016740.15041710732.118160.858012.70.04006250.205914580.0383260.2114332242163.14470.171211.40.00592670.04466140.024190.01978915456.13302100.637873.50.0533920.21742110.018450.135224011737.1885520.05915800.10.239260.015730.605414619.962748863114347.24321040.24032220.20.198780.061380.470111312.880632142816378.14363480.7999103.00.0392680.23141570.018350.098917611739.12631580.6018122.10.1110590.19901250.036490.557534123169.255400.7297171.10.1519400.2359790.2453615.13721982236734510.13093971.285082.40.0575830.41852010.018650.1478222119311.150200.4070101.20.2051660.10261210.1627414.601819849722311.279530.6696390.40.1919220.1876300.410710210.86483092275831811.350270.5419240.50.1840290.1533460.401710110.19303185269032612.14313220.7466130.90.0522330.2414750.026460.1897133168413.1115680.589046.00.05301890.21204340.023770.1728625151514.125200.7849114.20.07614210.22759560.0327160.343219272081015.11501100.736942.90.09811470.33023370.020360.2752429130416.1125800.637633.10.06461630.23763750.019960.1770456127417.17520.030833.60.05161470.04813300.032590.2313670206618.12001020.512043.40.05281080.16592460.019050.1380290121319.176690.917035.50.02971500.23353490.028680.1170596182520.1191980.511345.00.03011250.13082870.018250.0754317116321.16960.0932112.90.1292590.01531180.1420352.528813768562021.2106130.1239231.00.1456300.0344510.2049504.11531389229533522.186500.580334.30.03021600.12683680.027680.1149614175523.12021140.567252.40.05561100.19492530.019350.1478301123325.13051940.637571.70.0506580.19861330.018950.1321159121326.11801300.722261.50.0491700.19941600.027570.1860274175427.124160.653718.70.06163570.21268170.0322140.27421610205928.197400.414534.00.06161400.17773170.025370.2144497161430.154200.368540.4-0.0148173-0.05103970.068720-0.1402-1644281231.194740.787130.50.04071280.21732960.03048-0.1400-164154532.13912210.565586.20.0452530.17511200.019040.17104284281233.1143714250.9916323.70.0472160.3130400.018840.12215120334.167790.012913-0.10.0456300.0013630.020950.13159133335.182190.230521.90.03361990.0