三原地區(qū)全新世以來的氣候環(huán)境變化.pdf

1、長安大學(xué)碩士學(xué)位論文三原地區(qū)全新世以來的氣候環(huán)境變化姓名：胡培華申請學(xué)位級別：碩士專業(yè)：第四紀(jì)地質(zhì)學(xué)指導(dǎo)教師：李秉成20110531AbstractNowdays，theproblemoftheglobalenvironmentaldegradation，iscloselyinterrelatedtohuman’SlifeHoweverthemodemenvironmentalvariationisthenatureenvironmen

2、talestensionoftheQuaternaryHolocenePeriod，whichisrelatedtotheenvironmentaloftheHoloceneTherefore，themethodofstudyingthemleoftheenvironmentalvatiationinQuaternaryforforecastingtheenvironmentinthefutureisapplicateduniversa

3、llyThisissueresearchedSanyuanregionwhichislocatedintheLoessPlateauTheHoloceneloesspaleosolsequenceofthisarearealisticallyrecordsandreflectstheevolutionofclimateandenvironmentinthegeologicalperiodOnthebasisofcomprehensive

4、fieldinspection，thesubjectmadeaseriousdivision，lithologicaldescriptionandmorphologicalobservationontheHoloceneloessstratuminloessplateauofCuoeyuanofXianyangByanalyzedmagneticsusceptibilitycombinedwithsizeanalysicofthesec

5、tioninLiujiapovillageofXi’anandcomparedtothesectionsofotherauthors，thisissuedicussedtheloesspaleosolsedimentarysequence，sedimentarysequence，sedimentarylaw，rateofsedimentationandcharacteristicsofEastAsianmonsoonevolutioni

6、nthisareathenreconstructedthechangesequenceofclimateandenvironmentduringHoloceneinSanyuan，andfurtherrevealedthevariationmleofclimateandenvironmentalduringHoloceneintheregionFinallyeaplainstheclimatefluctuationisobviousdu

7、ringtheHoloceneinthisarea，andthishistorycanbedevidedinto5sragesasfollows：①10000，8500aBPitisconverersionstage，theclimateturnedfromthelastglaciationtothepostglacialageAtthattime，thetemperaturebecomeshigherandhigher②8500～63