浙闽地区白垩纪粘土矿物组成及碎屑组分的古气候指示

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1、CretaceousclimaticindicationsfromretaceoUScllmatlcinaicatloasIromcl。aymineralcompositionandclasticratioinZhejiangandFujian，SEChinabyLiuLingsupervisedbyProf．XianghuiLiAdissertationsubmittedtotheGraduateSchoolofNanjingUniversityfortheDegreeofMasterofEngineeringScho

2、olofEarthSciencesandEngineeringNanjingUniversityApril，2011宣重壑塾堕丝丝些垒墅丝丝塑垄堑旦丝毕业论文题目：—鼍篓竺竺凳蓑羔}粘±翌塑堕㈡IIIIII帅IIIII哪IIlll岫lllll㈣lllll哪lllll岫lllll蛐lllll咖liftIIIlI——————』鲢氲蝌髓L————一lY2377985地质工程专业2009级硕士生姓名：刘玲指导教师(姓名、职称)：．奎搓龌麴握．旱一半干旱气候，与全国乃至全球温室气候一致；但是，期间存在干冷和湿热气候间断，说明研究区

3、的气候并非一成不变。这些气候间断大致分别对应于白垩纪全球大洋缺氧事件结束后的一段时间，它们是否存在必然联系尚不清楚；推测认为，干冷气候可能与区域构造隆升有关。关键词：碎屑组分，粘土矿物，古气候，自垩纪，浙闽地区IITHESIS：CretaceousclimaticindicationsfromclaymineralcompositionandelasticratioinZhejiangandFujian，SEChinaSPECIALIZATIoN：GeologicalEngineeringPOSTGRADUATE：Liu

4、LingMENTOR：Prof．LiXianghuiAbstract：TheCretaceousisaparticularperiodthroughgeologicaltime，andhasbeenthoughttobeatypicalrepresentativeunderthe“greenhouse'’climate．HowevertherearefewevidencesfromthecontinentalCretaceoustosupporttheview．WidespreadcontinentalCretaceou

5、ssequencesinSEChina，dominatedbyredclasticrocks，DrovidetlSanimportantchancetoanalyzethe“greenhouse”climatefromterrestrialrecords．Ingeneral，redbed，desert，andgypsumrepresentsedimentaryresponseofthearidclimate．Thenquestionsarise：1)redbedsinZhejiangandFujianaretheprod

6、uctsundergreenhouseclimate?2)Isthe“greenhouse”climatechangeableduringtheCretaceousmSEChina?3)Howthe‘‘greenhouse”climatechange，ifyes?Compositionofclaymineralsandratiosofelasticcomponentsweremeasuredandanalyzedatelevenhorizonsfromelevenobservedsectionstointerpretch

7、angesoftheEarly-midCretaceouspaleoclimateinSWzhejiangandFujianprovinces，SEChina．Relativecontentsofclays(iUite，smectite，kaolinite，andchlorite)，illitecrystallization，madchemicalindexofillite，areinvolvedinthecompositionofclayminerals．andratiosofF／QandL／Qareforclasti

8、ccomposition．Theyareindicativesofpaleoelimate．T11eresultsshowthatsmectiteisdominantoftheclayintheCretaceousseauencesinSEChinawithmoreorlesschlorite，eitherkaoli