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

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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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机构地区 不详
出版日期 1997年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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