摘要
Wepresenta3DmodelofshearvelocityofcrustanduppermantleinChinaandsurroundingregionsfromsurfacewavetomography.Wecombinedispersionmeasurementsfromambientnoisecorrelationandtraditionalearthquakedata.ThestationsincludetheChinaNationalSeismicNetwork,globalnetworks,andalltheavailablePASSCALstationsintheregionovertheyears.Thecombineddatasetsprovideexcellentdatacoverageoftheregionforsurfacewavemeasurementsfrom8to120s,whichareusedtoinvertfor3Dshearwavevelocitystructureofthecrustanduppermantledowntoabout150km.WealsoderivenewmodelsofthestudyregionforcrustalthicknessandaveragedSvelocitiesforupper,mid,andlowercrustandtheuppermostmantle.Themodelsprovideafundamentaldatasetforunderstandingcontinentaldynamicsandevolution.Thetomographyresultsrevealsignificantfeaturesofcrustanduppermantlestructure,includingmajorbasins,Mohodepthvariation,mantlevelocitycontrastbetweeneasternandwesternNorthChinaCraton,widespreadlow-velocityzoneinmidcrustinmuchoftheTibetanPlateau,andclearvelocitycontrastsofthemantlelithospherebetweennorthandsouthernTibetwithsignificantE–Wvariations.ThelowvelocitystructureintheuppermantleundernorthandeasternTPcorrelateswithsurfacegeologicalboundaries.ApatchofhighvelocityanomalyisfoundundertheeasternpartoftheTP,whichmayindicateintactmantlelithosphere.MantlelithosphereshowsstrikingsystematicchangefromthewesterntoeasternNorthChinaCraton.TheTanluFaultappearstobeamajorlithosphereboundary.
出版日期
2013年05月15日（中国期刊网平台首次上网日期，不代表论文的发表时间）
