濟(jì)陽坳陷下第三系構(gòu)造特征及其對層序的控制作用.pdf

1、分類號UDC密級編號中國科學(xué)院研究生院博士學(xué)位論文V776841指導(dǎo)教師姜在興教授夏斌研究員廣州壺五山中國抖堂院廣州地璉化學(xué)研究所申請學(xué)位級別博士學(xué)科專業(yè)名稱構(gòu)造地質(zhì)學(xué)論文提交日期2Q墮生4旦2Q旦論文答辯日期2Q墮生旦絲旦培養(yǎng)單位中國科學(xué)院廣州地球化學(xué)研究所學(xué)位授予單位中國科學(xué)院研究生院答辯委員會(huì)主席裝盔塞麴援AbstractTHECHARACTERSANDCONTROLOFTECTONICSONSEQUENCESTRAl’IGRAP

2、HYoFTHELOWERTERTlARYINJlYANGBASlNByMaHuiDirectedbyJiangZaixingandXiaBinAbs仃actThispaperstudiesthecharactersandcontroloftectonicsonsequencestratigraphyoftheLowerTertiaryinJiyangbasinJiyangbasinexperiencedseveraltectonicac

3、tivitiesfromtheArchaentonowTheLowerTertiaryofthebasinisacompositehalfgrabenbasinwhichisfaultedinthenorthandonlappedinthesouthItiscontrolledbythreegroupsofextensionalandextension—twistedfaultsUnderthecontrolofthesefaults，

4、theLowerTertiaryinJiyangbasinischaracterizedby1allintensesegmentationofthestructuralframework；2multipletypesoftectonics；3successivetyofstructures；4stratificationandzonationoftectonicsInthispaperweusedtectonicsimulationme

5、thodtosimulatethetectonicevolvenlentoftheZhanhuadepressionItsresultsrevealthatthestructureinwhichthesagsandupliftsarearrangedalternatelywascausedbyintenseexpandingactivityItsextensionalratereached30％to100％Accordingtothed

6、evelopmentofsequencestratigraphyandtheresultoftheextensionalrateinZhanhuadepression，Jiyangbasinexperienced4timesofintenseextensionalactivitiesandlltimesofweakextensionalactivitiesintheearlyTertiarywhichcontrolledthedevel

7、opmentof2nd_orderand3rdordersequencerespectivelyWeusedthesoundradiationmethodtostudythecompressingtectonicsofDongyingdepressionintheCenozoicItsresultsdisplaythattheDongyingdepressionexperienced4timesofintensecompressingt

8、ectonicactivitiesand4powerlesscompressingtectonicactivitiesaftertheAgeofEs3，whichrepresentthecompressingtectonicactivitiesintheendofthedevelopmentof2nd_orderand3rd_ordersequencerespectivelyIntheinitialstageofeachsequence

9、thetectonicactivitieswereextendingandinthefinalstagethetectonicactivitieswerecompressingBytheresearchontheextendingmadcompressingtectonicactivitiesinJiyangbasinwecandividethelowerTertiaryintoone1stordertectonicsequence，f

10、our2ha_ordertectonicsequencesandsix31。dordertectonicsequences，whichareconsistentwiththesequencestratigraphyTectonicactivitiesarethemainfactorsincontrolofthesequencesbelowthe3rd_ordersequenceoftheLowerTertiaryinJiyangbasi