EffectsofCrustalEclogitizationonPlateSubduction/CollisionDyn

时间:2016-11-28 09:07:04 作者:PengpengHuangfu;Yue

本文作者:PengpengHuangfu;YuejunWang;ZhonghaiLi;WeimingFan;YanZhang;成功正常投稿发表论文到《JournalofEarthScience》2016年05期,引用请注明来源400期刊网!


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【摘要】:2Dthermo-mechanicalmodelsareconstructedtoinvestigatetheeffectsofoceanicandcontinentalcrustaleclogitizationonplatedynamicsatthreesuccessivestagesofoceanicsubduction,slabbreakoff,andcontinentalsubduction.Crustaleclogitizationdirectlyincreasestheaverageslabdensityandaccordinglytheslabpullforce,whichmakestheslabsubductdeeplyandsteeply.Numericalresultsdemonstratethatthedurationtimefrominitialcontinentalcollisiontoslabbreakofflargelydependsontheslabpullforce.Specifically,eclogitizationofsubductedcrustcangreatlydecreasethedurationtime,butincreasethebreakoffdepth.Thedetachmentofoceanicslabfromthepro-continentallithosphereisaccompaniedwithobviousexhumationofthesubductedcontinentalcrustandasharpupliftofthecollisionzoneinresponsetothedisappearanceofdownwarddragforceandtheinducedasthenosphericupwelling,especiallyundertheconditionofnoorincompletecrustaleclogitization.Duringcontinentalsubduction,theslabdipangleisstronglycorrelatedwitheclogitizationofsubductedcontinentallowercrust,whichregulatestheslabbuoyancynature.OurmodelresultscanprovideseveralimportantimplicationsfortheHimalayan-Tibetancollisionzone.Forexample,itispossiblethatthelateralvariationsinthedegreeofeclogitizationofthesubductedIndiancrustmighttosomeextentcontributetothelateralvariationsofsubductionanglealongtheHimalayanorogenicbelt.Moreover,theaccumulationofhighlyradiogenicsedimentsanduppercontinentalcrustalmaterialsattheactivemarginincombinationwiththestrongshearheatingduetocontinuouscontinentalsubductiontogethercauserisingofisothermsintheaccretionarywedge,whichfacilitatethedevelopmentofcrustalpartialmeltingandmetamorphism.
【论文正文预览】:0INTRODUCTIONTheslabpullisgenerallybelievedtobethedrivingmechanismforplatesubduction(e.g.,Schellart,2004;LithgowBertelloniandRichards,1995;Vignyetal.,1991;ForsythandUyeda,1975).Fromthemechanicalperspective,eclogitizationofsubdu
【文章分类号】:P542
【稿件关键词】:numericalmodelingcrustaleclogitizationoceanicsubductionslabbreakoffcontinentalsubductionHimalayan-Tibetancollisionzone
【参考文献】:
【稿件标题】:EffectsofCrustalEclogitizationonPlateSubduction/CollisionDynamics:ImplicationsforIndia-AsiaCollision
【作者单位】:State
【发表期刊期数】:《JournalofEarthScience》2016年05期
【期刊简介】:0......更多JournalofEarthScience杂志社(http://www.400qikan.com/qk/10904/)投稿信息
【版权所有人】:PengpengHuangfu;YuejunWang;ZhonghaiLi;WeimingFan;YanZhang;


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