21196.白馬雪山第四紀冰川地貌與冰期初步劃分

1、遼寧師范大學碩士學位論文白馬雪山第四紀冰川地貌與冰期初步劃分姓名：劉嘯申請學位級別：碩士專業(yè)：自然地理學指導教師：張威201205自馬雪山第四紀冰川地貌與冰期初步劃分TheFormatCriterionofMaster’SDegreePaperofLNNUAbstractBaimaxueshanlocatedinthemiddlepartofHengduanrange，whichisthewatershedoftheLancangRiv

2、erandJinshaRiveramongthethreeparallelriversareahonoredwiththefamousandme1argestareaofChinaWorldHeritageSitesAffectedbymesouthwestmonsoonandlocalcomplicatedtopographiccondition，theclimateinBaimaxueshanchangesfromthecoldcl

3、imateofthemodemglacierareaattheheightof4500mtothedryandhotclimatedistributeattheJinshaRivervalleyatabout2000mwhoseprecipitationonly200mmwhichindicatetheverticalzonationiSespeciallynotableExtensiveandtypicalglaciergeomorp

4、hologiesareintegratedpreservedabove3900matBaimaxueshanStudyoftheQuatemaryglaciationinBaimaxueshanissignificantnotonlyonrecoverythelocalpaloclimateandenvironment，butalSOinexplainingtherelationshipbetweenclimateandtectonic

5、upliftBasedonthefieldinvestigationoftheglacialsedimentsinBaimaxueshanandthefeatureoftheerosiongeomorphologylikecirque，valleyandsedimentgeomorphologysuchasterminalandlateralmorainepreservedabove3900mwebelievethatthestudya

6、reahasexperiencedthreemajorglacialadvancessincethelastglacialcycle，thatistheearlystageoflastglacialcycle，thelastglacialmaximum(LGM)andtheneoglaciationinHoloceneCFandTHARmethodsareappliedtocalculatethepalo—ELAsindifferent

7、stageTheresultsare4642m，4360mand4034mrespectivelyrespondingtotheNerglaciation，theLGMandtheearlystageoflastglacialcycleComparedwi廿1t11eglaciersequenceofothermountainsinHengduanmountainrangewediscoverythatthetimingofthegla

8、ciationindifferentmountains10catedattllesameplanationsurfaceinTertiaryhavegreatdifferenceItiSthetectonicupliftcoupledwiththeclimatechangethatledtheMountainstothesnowlineandwitnessedtheglacialadvanceMoreovercomparedwithth

9、e0thermountainsoftheenvironmentalmagnetismoftheglacialdepositsthemagneticsusceptibilityofBaimaxueshanisbetween556and1160，whichistoosmallItindicatesthattheaffectedfactorsontheglacialdepositarenotonlythemotherlithology，but

10、alsothecomplicatedclimateconditionsAtthesametime，itisindirecflyreflecttherelativedryandcoldclimateinBaimaxueshaninthelastglacialcycleItiSconsistentwiththephenomenonthatthehugemountainsin也ewestofBaimaxueshanliketheMeilixu