羌塘盆地藏夏河组砂岩地球化学特征及意义

Accessionnumber:20132316405210Title:GeochemicalcharacteristicsandsignaturesofthesandstonesfromZangxiaheFormationinQiangtangBasinAuthors:Song,Chun-Yan1;Wang,Jian1;Fu,Xiu-Gen1;Feng,Xing-Lei1;Zeng,Sheng-Qiang1,2;He,Li1Authoraffiliation:1ChengduInstituteofGeologyandMineralResources,Chengdu610081,China2GraduateDepartmentofChineseAcademyofGeologicalSciences,Beijing100037,ChinaCorrespondingauthor:Song,C.-Y.(331377185@qq.com)Sourcetitle:DiqiuKexue-ZhongguoDizhiDaxueXuebao/EarthScience-JournalofChinaUniversityofGeosciencesAbbreviatedsourcetitle:DiqiuKexueZhongguoDizhiDaxueXuebaoVolume:38Issue:3Issuedate:May2013Publicationyear:2013Pages:508-518Language:ChineseISSN:10002383CODEN:DIKEELDocumenttype:Journalarticle(JA)Publisher:ChinaUniversityofGeosciences,Yujishan,Wuhan,430074,ChinaAbstract:TheQiangtangbasinislocatedbetweentheJinshajiangsuture(JSS)andBangong-Nujiangsuture.ItisanimportantpetroliferousbasininthenorthernTibetPlateau,China.Itisformedbythestackingofmanybasinsofdifferentstages,propertiesandgenerations.TherehavealwaysbeenalotofdebateabouttheLateTriassicpropertyofQiangtangbasin,sotheLateTriassicZangxiaheFormationisselectedastheresearchsubjectinthispaper.TheZangxiaheFormation,whichisdepositedonthenorthernmarginoftheQiangtangbasin,isaverythickflysch(>3000m)withsandstoneandshalesediments.ItisanveryimportantindicatorfortheLateTriassicpropertyofQiangtangbasin.TheX-raydiffraction(XRD),majorcompositions,rareearthelementsandtraceelementsofthewholerocksandthefissiontracksofclasticzirconofthesandstonesfromZangxiaheFormationinQiangtangbasinarestudiedinthispaper,whichrevealsthatthetectonicsettingsofsourcerockareabelongtoactivecontinentalmarginandcontinentalislandarc.Combinedwiththeresultsofpreviousstudies,itisconcludedthatthemainsourceareaisJSSandthemajorsourcerocksarethefelsicrocks.ThefelsicrocksarelikelytheS-COLGwhichintrudedintotheJSSinMiddleTriassic.ThedepositiontimeoftheLateTriassicZangxiaheFormationisthesameastheformationtimeofJSS.SotheLateTriassicQiangtangbasinisaperipheralforelandbasin.Numberofreferences:44Mainheading:SandstoneControlledterms:Geochemistry-Rocks-Sedimentation-Silicateminerals-Stratigraphy-XraydiffractionUncontrolledterms:Bangong-NujiangSuture-Continentalmargin-Geochemicalcharacteristic-LateTriassic-Petroliferousbasins-QiangtangBasin-Tectonicsettings-ZangxiaheFormationClassificationcode:481.1Geology-481.2Geochemistry-482.2Minerals-802.3ChemicalOperations-931.3AtomicandMolecularPhysicsDOI:10.3799/dqkx.2013.051Database:CompendexCompilationandindexingterms,?2013ElsevierInc.