18775.蘇北盆地36萬年以來古氣候環(huán)境變化研究

1、學(xué)位論文獨創(chuàng)性聲明本人鄭重聲明：所提交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進行的研究工作和取得的研究成果。本論文中除引文外，所有實驗、數(shù)據(jù)和有關(guān)材料均是真實的。本論文中除引文和致謝的內(nèi)容外，不包含其他人或其它機構(gòu)已經(jīng)發(fā)表或撰寫過的研究成果。其他同志對本研究所做的貢獻均已在論文中作了聲明并表示了謝意。學(xué)位論文作者簽名：客司b鞋日期：加／j；f學(xué)位論文使用授權(quán)聲明研究生在校攻讀學(xué)位期間論文工作的知識產(chǎn)權(quán)單位屬南京師范大學(xué)。學(xué)校有權(quán)保存本學(xué)位論文的電

2、子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以采用影印、復(fù)印等手段保存、匯編本學(xué)位論文。學(xué)校可以向國家有關(guān)機關(guān)或機構(gòu)送交論文的電子和紙質(zhì)文檔，允許論文被查閱和借閱。(保密論文在解密后遵守此規(guī)定)保密論文注釋：本學(xué)位論文屬于保密論文，密級：盆墨保密期限為——年。學(xué)位論文作者簽名：芻阻指導(dǎo)教師簽名：／筘蓯日期：為陸；Ⅺ日期：洲Ls≥1AbsractAbSraCtTheresearchofQuatemaryclimatech

3、allgeisVeryimportantforreconstmctingthepastandpredictingthefmureglobalclimatechange，especiallyfortheresearchofthetypicalmonsoonregionInthispapertheobjectofgnJdyisthesedimentsofXinghuainSubeiBasinWecarriedoutaseriesof、Ⅳor

4、kincludingtakingdrillingandc01lecting協(xié)esamples；establishedachmnologyby“Cdating，paleomagneticdatingandclimatestrati2Ta：phyThenanalyzedtheparticlesize鋤dgeochemicalelementsbasedonthe丘ont鋤aIysisAtlastrebuihtheenvirollIIlenta

5、landclimaticchaIlgeofSubeiBaSinsince36millionyearsThefollowingisthebriefconclusionofthestudy：1Reconsrrcuctthetimeseriesf如m42metersdepthofsedimentarystrataaccordingtotheHCdating，paleomagneticdatingandclimateStrati鏟aphy，th

6、eageof42misabout360ka2EstablishedSubeiBaSinclimateevolutionsince36milIionVearsaccordingtoanalysistheindicatorsofmeparticlesize(averagepaniclesize，mediandialneter，sortingcoe伍cient，kurtosis，skewness)andgeochemicalelementan

7、alysis(correlationanalysis，theRfactoraIlalysis，asin91erepresentativeelements，elementratiosanalysis)Ⅱ1emuhiproxyrecordssuggest8stagesofclimatechallges：(1)360一335kacorrespondingtoMISl0，isac01danddfyclimate，andgraduaUybecom

8、ewannandh啪jd；(2)335292ka，correspondstoMlS9，、vamlandh啪idclimate；(3)292—242k鞏correspondingtoMIS8，isacoldanddryclimate’butthemiddleofthisperiodhasaweakcoldandd1Ⅳclimatenuctuationsandconfonnaglacial—interglacialclimatecycles

9、withtheupperstage；(4)242—191ka，conespondstoMIS7，wannandhumidcIimatedominated，butshowingdoublewarmandacoldnuctuations；(5)191130ka，coHespondingtoMIS6，acoldanddryclimateandalmostwitlloutnuctuationconstitutesaglacial—inte唱la

10、cialcycleswitht11elaststagetoo；(6)130—70ka，correspondst0MIS5，w刪landhumid，buttherearethreew鋤aJld撕ocoldclimatenuctuations：(7)7012ka，mainlycorrespondsinMIS4—2，c01danddryclimate，butt11erearestillseistwannclimate，andwiththela

11、ststageconsistamosttypicalglacialcycIes；(8)120kainMIS1stage，overallawanlla11dhumidclimate，buttheproximategradenuctuationsofwetanddryissignificant311heresultofanalysin2themediandi鋤eteraJldRb／SrofXH一2holesectionreVealedtha

12、titisVeUsimilarwiththeclaSsicdeep—seaoxygenisotope，theLillgtailoessma窖：11eticsusceptibilitvcurve，andsea—levelchaJl2ecurveThjsindicatesthattheclimatechangeineastemChinanotonlyhasgreatcorrelationwiththeglobalclimatechangeb