Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River)-中国期刊网

摘要 SeismictomographyfromthePgwavedataalongthenon-longitudinalprofileintheThreeGorgesRegionispresentedinthispaper.Theseismictomographymethod,andtheacquisitionandanalysisofseismictraveltimearebroadlyoutlined.Thetomographyofbasementrevealsagreatamountofsignificantinformationandshowsthatthelow-velocityzoneisduetothelithologicdifferenceandthefaultfracturezone.Italsodemonstratesthatthereexistthreehigh-velocityzoneswithv>6.4km/satthebasement;thelargestofzoneswhichstrikesnorth-southislocatedatthesouthwesternsideofHuanglingAnticlinoriumandextendsintotheanticlinoriumnorthward.Theothertwohigh-velocityzonesare,respectively,situatedattheeasternsideoftheanticlinoriumandthewesternsideoftheprofile.Thehigh-velocityzonesareinferredtooriginatefromtheupwellingofmaterialwithhigh-velocityfromdeepcrust.

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Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River)

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Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River)

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