简介: 1Introduction Itiscommoninmobilebeltsthatupliftingmountainsareneighboredbysynchronouslysubsidingbasins.Thecouplingmechanismofsuchsubsidenceandupliftisanimportanttargettoclarifythedynamicsofmobilebelts.WeinvestigatethecoupledmountainupliftandbasinsubsidenceintheCentralJapanhighland,thejunctionofthreeislandarcs(theNortheastJapan,theSouthwestJapanandtheIzu-Ogasawaraarcs).Thehighlandover3000minheightiscomposedofmountainranges,plateausandintramountainbasins(Fig.1).……
简介:象腹股沟,纵的堤和防波堤那样的水力的结构在管理和水交通工程在家和国外投射的水里是普通的,它长有由稳固的集体结构的形式统治了。与是的刷子和石头造材料,这种结构有明显的工程效果。然而,它不仅要求巨大的大写的投资,而且在生态的环境上有否定影响。推迟的灵活水坝是一项创新工程措施,和水坝能目前被发现的这种类型的很少理论、试验性的研究。这篇论文学习机制和这个水坝的形状特征并且在三种形式之中为转变获得灵活水坝,漂流快活表示,和条件的动态平衡方程在水下水坝的形状。结果在设计申请是珍贵的并且能为持续开发由于特殊设计哲学,环境上的小否定效果和一致性为未来工作被用作引用。
简介:IntroductionManyearthquakeshaveproventhatthereexistedshalowgeotemperatureanomaliesaroundtheearthquakeregionsbeforetheeventsoc...
简介:Anexperimentofuniaxialcompressionwascarriedoutonsamplesof8representativerocktypes.Thetemporalvariationsoftheremanentmagnetization,strainandacousticemissionofsampleswererecordedandinvestigated,especiallywhenthesampleswereunderconstantloadandwhentheyhadjustbeenunloaded.Itwasfoundthatmostsamplesstillshowedchangesoftheirremanentmagnetizationunderconstantloadandthetendencyofthesechangesremainedthesameasthatbeforetheloadhadbeenkeptconstant.Inthemeantime,similarchangesofstrainswereobservedaswell.However,inashorttimeperiodimmediatelyafterthesamplehadbeencompletelyunloaded,thevariationsofremanentmagnetizationandstrainswerestillobserved.Theabovephenomenaseemtobethereflectionofrheologicalpropertiesofrocks.Itisinterestingtonotethatsomesimilarphenomenawerealsofoundinfieldobservations,suchasaseismicgeomagneticchangesandsecularvariationinlocalgeomagneticfieldbeforeandaftere
简介:高周波的地震变细通常被归因于有弹性的吸收。在这篇论文,我在场高周波的地震变细上的三研究并且建议物理机制源于有弹性的显微镜的多重散布波浪的干扰。首先,我在基于为波浪繁殖的基本单位是一个nano团点的概念的二阶段的媒介在波浪繁殖上建议一个新理论。由于毛孔液体和岩石框架的弹性变化,微多重散布波浪将在通过二阶段的媒介和他们的干扰的震波的波长出现,重叠将产生高周波的地震变细。第二,我在场由当模特儿的地震播送波浪的频率反应的研究与比毛孔直径没有大的厚度薄层。结果显示高周波的震波在一个近表面的水地区稍微稀释,但是在一个近表面的煤气的地区显著地腐烂。第三,我在Songliao盆用双井的射击在近表面的水和煤气的地区里分析地震变细特征,并且证明高周波的震波在水地区稍微稀释,但是在气体,宣传的1601600Hz挥动的地区显著地腐烂。来自观察与当模特儿的结果与一致的地的地震变细特征。理论上从这些研究得出的结论支持地震变细恢复。
简介:Inshallowcrust,faultsoftenconsistofaseriesofsecondaryfractures.Basedonexperimentalmicro-featuresinrockmechanicsandmacro-structuresinfield,theprogressivecoalescencemodel,inwhichabrittlefaultevolvedfrommicro-crack,styloliticfracture,largefaulttosuper-largefault,isfounded,anditsformingmechanismisdiscussedbyvariationofstressfield.Atlasttheundulation,branchesoffaultsandthephenomenonthattheanglebetweenfracturesandtheprincipalstressaxisdecreasesgraduallyareexplainedbytheG.C.Sihmodel.
简介:Inthispaper,thefocusdepthdistributionofearthquakeswitheachmagnitudehasbeenanalyzed.Statisticdatashowthatthelowermagnitudeis,thewiderfocusdepthdistributes.Withlargermagnitude,thefocustendstobeconcentratedinupperormiddlecrustallayers.Weanalyzedthecauseoffocusdepthdistributionandexplainedtheprecursormechanismofsmallandmoderateearthquakeswithoccurringconditionandcharacteristicsofstrongearthquakes.Theresultsofthispapermaybeappliedtodeterminerisksitesofstrongearthquakes.
简介:Underpressured水库在Huatugou是普遍的()油矿西方在Qaidam盆高举,西方的中国。在在462和1248m之间的深度,在Huatugou油矿的晚第三纪水库的压力仅仅是大约40%~80%静水力学的压力。基于这些underpressured水库的地质的特征的研究,这个工作使用了液体包括分析和数字模拟调查创造这些反常压力的机制并且评估烃分发的特征。结果证明underpressured水库由undercompacted和厚mudrocks是全封上得好的。大规模构造在晚喜玛拉雅的戏高举在在Huatugou油矿的underpressure的产生的一个重要角色。在这个运动的开始,地由于阵发性的石油累积是overpressured。后来,结构高举并且侵蚀导致了多孔的反弹和温度减少,它生产了underpressure。
简介:AsymmetryoftheWeiheBasinisdiscussedinthepaper,andalsothemastercontrolfault,secondarycontrolfaultofasymmetricbasinisproposedinthepaper.TheasymmetryoftheWeiheBasinisexpressedasfollows:(1)itsshapeofthecrosssectionsisasymmetrical;(2)thetectonicactivityofthesouthernmarginfaultandthenorthernmarginoneisapparentlydifferent;(3)itsdeeptectonicsisasymmetrical.Finally,weusetheWeiheBasinasanexampletoestablisha"cantilever-beam"modelforcalculations.Theresultsshowthat:(1)flexureleadstostressaccumulationandformingextensionalfractures;(2)fracturesslopesteeplytowardsthefreeend;(3)whenthelengthofbeambecomeslonger,itispossiblethatnewextensionalfractureswilloccurinthefixedend.
简介:Recenthigh-resolutiondeepseismicreflectionprofileacrosstheKunlunfaultinnortheasternTibetshowsclearlythattheMohoiscutoffbyacomplexthrustfaultsystem.Mohooffsetisageneralphenomenon,butlittleisknownaboutthedynamicmechanism.Inthisstudy,contactmodelswithMaxwellmaterialsareusedtosimulatethemechanicalprocessofMohooffsetinducedbytheaseismicslipofdeeplyburiedfaults.Basedontheseismicreflectiondata,weprojectasinglefaultmodelandacomplexfaultsystemmodelwithtwofaultsintersecting.ThedeformationsoftheMoho,theaseismicslips,andcontactstressesonfaultsindifferentmodelsarediscussedindetail.ResultsshowthattheMohooffsetmightbeproducedbyaseismicslipofdeeplyburiedfaults,andthemagnitudeisinfluencedbythefrictioncoefficientoffaultsandtheviscosityofthelowercrust.ThemaximumslipoccursneartheMohoonthesinglefaultoratthecrossingpointoftwointersectingfaultssystem.StressconcentratesmainlyontheMoho,thedeependoffaults,orthecrossingpoint.ThisstudywillthrowlightonunderstandingthemechanismofMohooffsetandaseismicslipofdeeplyburiedfaults.Theresultsofcomplexfaultsystemwithtwofaultsintersectingarealsousefultounderstandtheshallowintersectingfaultsthatmaycauseearthquakes.
简介:Basedonresearchesmadebytheauthorinrecentyears,discussionismadeofthequasi-40-dayoscillation(QDO)natureanditscharacteristicpropagation,withemphasisontheSouthernHemispheremill-latitudequasi-periodiccoldairforcingonthetropicalatmospherequasi-40-dayoscillationalongwithitseffectupontheNorthernHemispheresummermonsoon.Itisproposedthattheinteractionbetween,orlateralcouplingof,meridionalcirculationsystemsmayserveasthemechanismoftheoscillationpropagationinameridionaldirection.
简介:陆地使用转变在社会经济的变化和革新驾驶的时间的某个时期上在某个区域的陆地使用形态学(主导的形态学和后退的形态学)指变化,并且它通常对应于社会经济的发展阶段的转变。在中国,农田和农村住房土地是陆地使用转变的二主要来源。这份报纸在中国分析农田和农村住房陆地转变的时间空间的联合特征,用高分辨率的LandsatTM(题目的Mapper)在2000和2008的数据,和从土地的部和中国的资源的数据。结果显示了那:(1)在20002008期间,农田的关联系数对农村住房土地变化是0.921,并且它证明农田的变化模式和农村住房土地是不协调的;(2)枪兵等级关联分析的结果证明那个农村住房陆地变化在农田和农村住房土地的相互的转变起了一个主要作用;并且(3)它出现一在20002008期间的在东南中国的在农田和农村住房陆地变化之间的高度的空间联合。一般来说,在中国的农田和农村住房陆地转变被社会经济、生物物理、经理的三维的开车因素在农村人口,农田和农村住房土地之中通过相互作用驾驶。然而,在中国的农田和农村住房陆地转变的时间空间的联合现象和机制大部分由于农村城市的开发的双轨道的结构。
简介:东方Asiansubtropical西的喷气(EAWJ)和热机制的紧张和地点的季节变异被从1961~2000使用NCEP/NCARmonthlyreanalysis数据分析。EAWJ的季节变异集中,这被发现不仅有重要南方的移植,而且显示出快速的带的排水量duringJune7月。而且,在那里存在带的矛盾在向北方转移EAWJaxis的过程。EAWJ季节变异的热机制上的分析显示EAWJ季节变异的年度周期与气温的南方的差别的结构匹配很好,建议EAWJ季节变异是仔细与由于太阳辐射和陆地海的不同类的加热有关热对比。Throughinvestigating在EAWJ和热运输之间的关系,这被揭示EAWJweakens和移动向北方在到夏日的从冬的温暖的时期期间,而theEAWJ加强并且变在到冬的从夏日的冷却时期期间向南方。水平热移流运输的Themeridional差别是决定南方的温度差别的主要因素。EAWJ的南方的移动跟随水平热移流运输的最大的南方的坡度的地点。在从Aprilto10月的时期期间,加热的diabatic在EAWJcenter的带的排水量起主角。西藏的高原加热到中间上面的对流层的diabatic在6月7月期间导致EAWJ中心的快速的带的排水量。
简介:Comprehensivestatisticalanalysiswasperformedonthebasicfeaturesoffocalmechanismsof619ML≥2.0earthquakeswhichoccurredinthecapitalcircleareafromJanuary2002toJune2010.Bydividingthecapitalareaintothreestudyingregionsbasedonregionaltectoniccharacteristics,clusteranalysiswasconductedonthefocalmechanismsofallsubregionsusingthelongestdistancemethodinthestatisticalclusteranalysistostudythecharacteristicsoftectonicstresstensors.TheresultshowsthatdominantP-axisazimuthdistributionisNNE-NEEandthatofT-axisisNNW-NWW,mostofthefocalareasarecontrolledbyahorizontalstressfieldandruptureismainlyofhorizontalstrike-slip.ThemaximumprincipalcompressionstressorientationisNE75°inthewest,NE62°inthemiddle,andnearEWintheeastofthecapitalarea.Theregionaltectonicstressfieldischaracterizedbyhorizontalcompression.
简介:ThecontinentalmarginalextensionconceptdevelopedbyChinesegeologistsrecentlymaybeappliedtotheexplanationabouttheCenozoicextensionanddivergentmovementoftheEasternAsiancontinentalmargin.Fromtheviewpointofcontinentalmarginalextension,thispaperdiscussesthedeeptectonothermalmechanismofthetectonicextensionoftheEasternAsiancontinentalmargin.TheEasternAsiancontinentalmarginisanextensionalbeltwithintensivemagmatismandstructuraldeformation,geophysicallycharacterizedbycontinualearthquakesandobviousgeothermalanomaly.SeismictomographicalresultsabouttheEasternAsiancontinentalmarginimplythatthePacificPlateissubductedtowardtheEurasianPlateatalowangleandthedivingPacificPlateliesonthesurfaceofthe670-kmphasetransitionalzone.Weinterpretthisfeaturetoberesultedfromretrogressivesubductionfollowedbycontinentalmarginalextension.Ourthermalmodelingandgeodynamicalcomputationresultssuggestthattheretrogressivesubductionoccurredatabout76Maandthewithdrawalofthetrenchservedtosupplythevolumeforthecontinentalgrowth,whichledtotheformationofthegrowingfrontoftheEasternAsiancontinentalmargin.ThegrowthwidthoftheEasternAsiancontinentalmarginisabout700km.
简介:Inthispaper,aheavyseafogeventoccurringovertheYellowSeaon11April2004wasinvestigatedbaseduponobservationalandmodelinganalyses.Fromtheobservationalanalyses,thisseafogeventisatypicaladvectioncoolingcase.Seasurfacetemperature(SST)andspecifichumidity(SH)showstronggradientsfromsouthtonorth,inwhichwarmwaterislocatedinthesouthandconsequently,moistureislargerinthesouththaninthenorthduetoevaporationprocesses.Afterfogformation,evaporationprocessprovidesmoremoistureintotheairandfurthercontributestofogevolution.TheseafogeventwasreproducedbytheRegionalAtmosphericModelingSystem(RAMS)reasonably.Therolesofimportantphysicalprocessessuchasradiation,turbulenceaswellasatmosphericstratificationinseafog’sstructureanditsformationmechanismswereanalyzedusingthemodelresults.Therolesoflongwaveradiationcooling,turbulenceaswellasatmosphericstratificationwereanalyzedbasedonthemodelingresults.Itisfoundthatthelongwaveradiativecoolingatthefogtopplaysanimportantroleincoolingdownthefoglayerthroughturbulencemixing.Thefogtopcoolingcanoverpowerwarmingfromthesurface.Seafogdevelopsupwardwiththeaidofturbulence.Thebuoyancyterm,i.e.,theunstablelayer,contributestothegenerationofTKEinthefogregion.However,thetemperatureinversionlayerpreventsfogfromgrowingupward.