環(huán)渤海灣地區(qū)下古生界層序巖相古地理特征及演化.pdf

1、成都理工大學博士學位論文環(huán)渤海灣地區(qū)下古生界層序巖相古地理特征及演化姓名：李君文申請學位級別：博士專業(yè)：沉積學指導教師：陳洪德20070501成都理工大學博士學位論文ThecharacteristicandevolutionofsequencelithofaciespalaeogeographyoflowerPaleozoicaroundBohaiGulfareaIntroductionoftheAuthorLiJunwenWaSbom

2、onDec12，1973UndertheguidanceofPro￡ChenHongdeonSep9，2004，hewasawardedtheDoctor’SDegreeonJune，2007ABSTRACTnIelowerPaleozoieisasetofrelativelystablemarinecarbonaterocksdepositionaroundBohaiGulfareaFormanyyearsmanyresearcher

3、shavestudiedtheareafromeachaSpectindetail，butnotyetobtainsthesignificantbreakthroughintheoilgasexplorationTIlisthesisaccordingtothetheoryofsedimentologyandsequencestratigraphyandSOon，takingthesequenceevolutiondepositione

4、volutionandbasinevolutionasthemasterlineOnthebaSisofthefieldseetiontheregionstratummaterial，thegeneralizedanalysisofdrill—coreandloginformation，thendividingandcontrastingthesequencestratigraphyofthelOWerPaleozoicaroundBo

5、haiGulfareathenestablishingsequencestratigraphicframeworkW岫thecombinationofpointandface，workingoutsequencelithofaciespalaeogeographymapandstudyingsequencepalaeogeographicevolutionanddistributionofvariousperiodsinordertop

6、rovidereferencetooil—gaSexplorationThemainachievementandtheunderstandingaregeneralizedasfollows：(1)Usingthemodemstratigraphymultiples打aturndivisionandcontrastprincipletosystematicallyandcomprehensivelycleanupandcontrastt

7、heIowerPaleozoicinstudyarea(2)Basingonthemassivefieldsectionsobservationandthedrillgoredescriptionindetailed，eighttypessequencebottomboundarywereidentified，thesequencesurfacecanbesummedupfourgenetictypeswhicharetheorogen

8、icerosionalsequencetmeonformity，theuplifterosionalsequenceunconformity，thetransgressiveonlapsequenceunconformityandtheexposedsequenceunconformity(3)ThelOWetPaleozoicCambriancallbepartitionedinto13third—ordersequencesand2

9、supersequences(thesecondorder)andtheOrdovicianCanbepartitionedinto1ltllirdordersequencesand2supersequencesThebasiccharacteristicofsequencestratigraphyunit，thestackingrelationsandthespatialdistributionrulehavebeenanalysis

10、eddetailedlyandthenestablishedisechronalsequencestratigraphyframeworkofthelowerpaleozoicinthestudyarea(4)Accordingtothesealevelchange，thedepositsupply，thetectonicsubsidence，theclimateand50onthemaincontrollingfactorsofseq

11、uencedevelopmentiSdiscussedinthisthesisthenrevealedtheprimarycontrolfunctionofthesealevelchangetothesequencedevelopmentandthedepositionalsystemtractdistribution(5)Ninesupersequencelithofaciespalaeogeographymapsinthestudy

12、arealowerPaleozoichavebeencompiledonconditionofsupersequeneesystemtractused勰drawingunit，itrevealsthecharacteristicandevolutionoflithofaciespalaeogeographyofdifferentsystemtractperiod；Inviewofthekeyformationoflowerpaleozo