胶东谭格庄地区奥长花岗质片麻岩和斜长角闪岩的野外地质和锆石SHRIMP定年.pdf

《胶东谭格庄地区奥长花岗质片麻岩和斜长角闪岩的野外地质和锆石SHRIMP定年.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、1000-0569／2013／029(02)-0619．29ActaPetrologicaSinica岩石学报胶东谭格庄地区奥长花岗质片麻岩和斜长角闪岩的野外地质和锆石SHRIMP定年颉颃强万渝生王世进刘敦一谢士稳刘守偈董春艳马铭株XIEHangQiang，WAINYuSheng，WANGShiJin，UUDunYi，XIEShiWen，UUSh0uJie，DONGChunYanandMAMingZhu1．中国地质科学院地质研究所北京离子探针中心，北京1000372．山东省地质调查院，济南2500131．BeijingSHRIMPCenter，lnstit~eofGeo

2、logy，ChineseAcademyofGeologicalSciences，Beijing100037，China2．ShandongInstituteofGeologicalSurvey，，f’／tan250013，China2012-10—15收稿．20134)1—15改回．XieHQ，WanYS，WangSJ，LiuDY，XieSW，LiuSJ，DongCYandMaMZ．2013．GeologyandzircondatingoftrondhjemiticgneissandamphiboliteintheTangezhuangarea，easternShand

3、ong．ActaPetrologicaSinica。29(2)：619-629Abstract～2．5Gaand～1．9GametamorphiceventsarewidelyrecordedallovertheNorthChinaCraton．beingimportantforunderstandingtheformationandevolutionofthecraton．EasternShandongislocatedintheeasternNorthChinaCrotonandcontainsmetamorphicrockswiflaca．2．5Gaandca．1

4、．9Gametamorphiczirconages．ForfurtherconstrainingtheEarlyPrecambriantectono-thermaleventsinthearea，wecarriedoutdetailedfieldobservationandSHRIMPU—PbzircondatinginaroadcuttingsectionnearTangezhuang，LaixiCounty，easternShandong．Theoutcropconsistsofinterlayeredandfoldedtrondhjemiticgneissesan

5、damphibolites．Thefoliationoftherocksiscompletelyparalleltoeachotherandshowsthininterlayerinstrongdeformationdomain，suggestingthatthininterlayersofdiferentcomponentscannotbeconsideredasafactthatthepmtolithsalesedimentaryinorigin．SHRIMPU—Pbzircondatingyieldedanageof2496-4．1OMa(MSWD=0．45)fo

6、rmagmaticzirconsfromatmndhjemiticgneisssample(S1105)，withmetam一3rphicrimshavingagesofca．2．5Gaandca．1．9Ga．Twoamphibolitesamples(S1238andS0812)containmetamorphiczirconswithagesof1842±3Ma(MSWD=1．6)and1833-1-13Ma(MSWD=1．0)，respectively，butnomagmaticzirconshavebeenidentified．Combiningwithprev

7、iousresearches，wesuggestthattheLateNeoarcheanmetamorphismwidespreadoverthewholeJiaodongterrane，leadingtoanatexisandrecyclingofoldercrustmaterial，andtheLatePaleoprcterozoicmetamorphismshowsazonalfeatureasarlesultoforogenesis．KeywordsJiaodongterrane；SHRIMPzircondating；Neoar