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:20070611:973(:2002CB2117022);(:ZLJL7.201):(1971),,,,.:1673064X(2008)02001204PaleogeographyandbasintypeoftheearlyandmiddleJurassicinthenorthernmarginofQaidamBasin薛建勤1,金振奎2,齐聪伟2,赵明君1,杜培志1(1.,736202;2.(),102249):柴达木盆地北缘侏罗系后期改造强烈,地层赋存复杂,从地面露头钻井地震等资料入手,采用单因素分析多因素综合作图法,对下中侏罗统岩相古地理进行了定量研究.认为早中侏罗世时期该区主要发育湖泊相,以滨浅湖-半深湖相为主;现今下中侏罗统的分布范围并不代表其原始沉积盆地的边界,原始沉积盆地的北边界在南祁连山边界大断裂附近;北缘早中侏罗世时期为伸展断陷盆地.:柴达木盆地;侏罗统;沉积特征;沉积相;盆地边界;盆地类型:TE121.1+2:A,,,,.[13],,[4]([57]),,,.11.1(1).,,,,.,,NWSE,120083232()JournalofXianShiyouUniversity(NaturalScienceEdition)Mar.2008Vol.23No.2-,7600km2,700m.,.,(7000km2),,500m.,.,.1.2!,7.1.2.1早侏罗世沉积相17,,.(1).,,10%,3,,10%,1,32%.,-,,,,.1.2.2中侏罗世沉积相610,,(2),(3).2∀13∀:3,,-,,10%.,10%,.,,,,∀.1.3,,,,.,,,(1),:#,,();∃,,;%,,,,;&,,,,,,,,.,.,,(23).,,,,,,.,,.,.,.2,∀14∀().,,.,.,,.,,(4),80~100km.4,,,.,.,3.,,,----,,,170m,.,.,,,,,.3(1),∀,.(2),.(3),,.感谢:在本次研究过程中得到了中国石油大学冯增昭教授鲍志东教授,国土资源部岳来群主任,西南石油学院牟中海副教授的热情指导,特此感谢.:[1],.[J].,2003,5(4):475485.[2],.[J].,2000,27(2):4044.[3],,,.[J].,2000,7(3):145151.[4].∀[J].,2004,6(1):319.[5],,,.[M].:,1994.[6],,,.[J].,2002,4(1):112.[7],,,.[M].:,2004.:王辉∀15∀:ABSTRACTSOFTHEPRESENTISSUE(JXSYUISSN1673064X)StudyonthesedimentaryfaciesandsedimentarymodesofKepingtageFormationoftheSilurianinTarimBasinAbstract:ThereisgreatdifferenceinthesedimentaryenvironmentanddepositionalsystemofdifferentformationsoftheSilurianinTarimBasin.Bycombiningthedetailedobservationanddescriptionofthecoreswithloggingdata,regionalgeologicaldataandvariouslaboratoryanalysisidentificationdata,basedontheanalysesofthelithologyandsedimentarystructure,thesedimentarycharacteristicsandsedimentaryfaciesofKepingtageFormationarethoroughlystudied.Itisheldthatdeltaic,estuaryandtidalflatdepositionalsystemsaremainlydevelopedinKepingtageFormation.Basedonthestudyofthedepositionalsystems,thecorrespondingsedimentarymodediagramsareestablished.Keywords:TarimBasin;Silurian;sedimentarystructure;sedimentaryfacies;sedimentarymodeXIEJun1,2,ZHANGJinliang1,2,LIANGHuizhen2,WANGJinkai2(1.CollegeofGeosciences,OceanUniversityofChina,Qingdao266003,Shandong,China;2.RoomofOilfieldGeology,ResearchCenterofShandongProvinceforPetroleumExplorationandDevelopmentEngineering,Qingdao266510,Shandong,China)JXSYU2008V.23N.2p.15ApplicationofstratumstructureextrapolationmethodinthemultistagedenudationthicknessestimationofthePaleozoicinTazhongUpliftAbstract:Denudationestimationisanimportantandfundamentalworkintheresearchofbasins.However,thecommonmethodsforestimatingthedenudationthicknesshavesomelimitation:theyaregenerallyusedonlyforestimatingthetotaldenudationthicknessofsomeinterfaceorthedenudationthicknesscausingbysinglestagestructuralactivity.Butthestratumstructureextrapolationmethodcanbeusedforestimatingthedenudationthicknesscausingbymultistagestructuralactivities.Thecomprehensivestudyofsomeseismicsectionsshowsthatthereare3maindenudationinterfacesinTazhongUplift.ThedenudationdistributioncharacteristicsoftheseinterfacesonprofileandontheplaneindicatethatthestructuralevolutioncontrolsthedenudationdistributioninTazhongUplift.Moreover,thedifferencesbetweenthedenudationsofdifferentstagescanreflectthepalaeogeomorphologicalcharacteristicsandstructuralevolutionaryprocessesofthestages.Keywords:TazhongUplift;denudationthickness;palaeogeomorphology;structureevolution;stratumstructureextrapolationmethodZHOUXiaojun1,LINChangsong2,DINGWenlong2,LISanzhong1,PENGLi2,CHENQingqing2(1.CollegeofOceanGeosciences,OceanUniversityofChina,Qingdao266100,Shandong,China;2.CollegeofEnergyResources,ChinaUniversityofGeosciences(Beijing),Beijing100083,China)JXSYU2008V.23N.2p.611PaleogeographyandbasintypeoftheearlyandmiddleJurassicinthenorthernmarginofQaidamBasinAbstract:InthelatestageoftheJurassic,thenorthernmarginofQaidamBasinisintenselyremade,anditsformationoccurrenceiscomplex.Basedoncoredata,outcropdata,drillingdata,seismicdataandsoon,thepaleogeographyoftheearlyandmiddleJurassicisquantitativelystudiedbyusingsinglefactoranalysisandmultifactormappingmethod.ItisheldthatintheearlyandmiddleJurassic,lakefaciesdevelopintheregion,anditismainlyshoreshallowhalfdeeplakefacies;itsrecentdistributionrangeisnottheboundaryofprimarysedimentarybasin,andthenorthernborderoftheprimarysedimentarybasinisnearthethrustfaultsoftheSouthernQilianMountains;thenorthernmarginofQaidamBasinisextensionalfaulteddepressionbasinduringtheearlyandmiddleJurassic.Keywords:QaidamBasin;Jurassic;sedimentarycharacteristic;sedimentaryfacies,basinborder;typeofbasinXUEJianqin1,JINZhenkui2,QICongwei2,ZHAOMingjun1,DUPeizhi1(1.ResearchInstituteofPetroleumExplorationandDevelopment,PetroChinaQinghaiOilfieldCompany,Dunhuang736202,Gansu,China;2.FacultyofResourcesandInformation,ChinaUniversityofPetroleum(Beijing),Beijing102249,China)JXSYU2008V.23N.2p.1215TimespaceevolutionlawandcontrollingfactorsoftheheterogeneityofShi115turbiditefanreservoirinDongyingSagAbstract:Thestudyonthecharacterizationofreservoirheterogeneityshouldbefromstaticstatetodynamicstate.TakingtheShi115blocklocatedinthewestofcentralupliftbeltofDongyingSagasanexample,thespacetimeevolutionlawandcontro