简介：最新发现的Zhunuo斑岩Cu-Mo-Au存款在南部的西藏位于Gangdese斑岩铜带的西方的部分，SW中国。在Zhunuo区域的granitoidplutons由石英闪长岩斑岩，闪长岩斑岩，granodiorite斑岩，黑云母monzogranite和石英斑岩组成。石英闪长岩斑岩产出51.9愠摮戠潩敭楤慣?灡汰捩瑡潩獮戠'坍剶茶?湥'L敬?敲潣湧瑩潩?景愠瑣癩?湡?湩捡楴敶猠敷瑡瀠牯獥漠?畣癲摥猠楫??晲捡獥眠敨敲爠杩摩漠?慰数?祴数猠敷瑡瀠牯?敳獮牯?的锆石U-Pb年龄牡?湩晥敦瑣癩e

简介：ThisstudyinvestigatesclassificationanddiurnalvariationsoftheprecipitationechoesoverthecentralTibetanPlateaubasedontheobservationscollectedfromaC-bandvertically-pointingfrequency-modulatedcontinuous-wave(C-FMCW)radarduringtheThirdTibetanPlateauAtmosphericScientificExperiment(TIPEX-Ⅲ)2014-IntensiveObservationPeriod(2014-IOP).Theresultsshowthat51.32%oftheverticalprofileshavevalidechoeswithreflectivity>-10dBZ,and35.06%ofthevalidechoprofilesproduceprecipitationattheground(precipitationprofiles);stratiformprecipitationwithanevidentbright-bandsignature,weakconvectiveprecipitation,andstrongconvectiveprecipitationaccountfor52.03%,42.98%,and4.99%oftheprecipitationprofiles,respectively.About59.84%oftheprecipitationoccursintheafternoontomidnight,while40.16%oftheprecipitationwithweakerintensityisobservedinthenocturnalhoursandinthemorning.Diurnalvariationofoccurrencefrequencyofprecipitationshowsamajorpeakduring2100-2200LST(localsolartime)with59.02%beingthestratiformprecipitation;thesecondarypeakappearsduring1300-1400LSTwith59.71%beingtheweakconvectiveprecipitation;thestrongconvectiveprecipitationoccursmostly(81.83%)intheafternoonandeveningwithtwopeaksover1200-1300and1700-1800LST,respectively.Startingfromapproximately1100LST,precipitationechoesdevelopwithenhancedverticalairmotion,elevatedechotop,andincreasingradarreflectivity.Intenseupwardairmotionoccursmostfrequentlyin1700-1800LSTwithasecondarypeakin1100-1400LST,whilethetopsofprecipitationechoesandintenseupwardairmotionreachtheirhighestlevelsduring1600-1800LST.Theatmosphericconditionsintheearlymorningaredisadvantageousforconvectiveinitiationanddevelopment.Aroundnoon,theconvectiveavailablepotentialenergy(CAPE)increasesmarkedly,convectiveinhibition(CIN)isgenerallysmall,andasuper-dry-adiabaticlayerispresentnear

简介：Anew3Dvelocitymodelofthecrustanduppermantleinthesoutheastern(SE)marginoftheTibetanplateauwasobtainedbyjointinversionofbody-andsurface-wavedata.Forthebody-wavedata,weused7190eventsrecordedby102stationsintheSEmarginoftheTibetanplateau.Thesurface-wavedataconsistofRayleighwavephasevelocitydispersioncurvesobtainedfromambientnoisecross-correlationanalysisrecordedbyadensearrayintheSEmarginoftheTibetanplateau.ThejointinversionclearlyimprovesthevSmodelbecauseitisconstrainedbybothdatatypes.Theresultsshowthatataround10kmdepththerearetwolow-velocityanomaliesembeddedwithinthreehigh-velocitybodiesalongtheLongmenshanfaultsystem.Thesehigh-velocitybodiescorrespondwellwiththePrecambrianmassifs,andthetwolocatedtothenortheastof2013MS7.0Lushanearthquakeareassociatedwithhighfaultslipareasduringthe2008Wenchuanearthquake.Theaftershockgapbetween2013Lushanearthquakeand2008Wenchuanearthquakeisassociatedwithlow-velocityanomalies,whichalsoactsasabarrierzoneforrupturesoftwoearthquakes.Generallylargeearthquakes(M≥5)intheregionoccurringfrom2008to2015arelocatedaroundthehigh-velocityzones,indicatingthattheymayactasasperitiesfortheselargeearthquakes.Jointinversionresultsalsoclearlyshowthatthereexistlow-velocityorweakzonesinthemid-lowercrust,whicharenotevenlydistributedbeneaththeSEmarginofTibetanplateau.

简介：ThetectonicactivitiesoccurringsincetheCenozoicinthenorthernpartoftheQinghai-TibetPlateau（theregionfromtheEastKunlunMountainstotheTanggulaMountains）wereprobablycausedbytheintenseintraplatedeformationpropagationafterthecollisionbe-tweentheIndianplateandtheEurasianplate.Theirmainexpressionsincludethesubstantialup-liftingoftheplateau,alternationofhorizontalextensionandcompressionundertheverticalgreatestprincipalstressσ1,occurrenceofrift-typevolcanicactivity,formationofthebasin-rangesystem,andsuccessiveeastwardextrusionofblocksresultingfromlarge-scalestrike-slipfaulting.Geophysicalexplorationandexperimentshaverevealedthatthereexistclose-lyalternatinghorizontalhigh-velocityandlow-velocitylayersaswellaslithosphericfaultsofaleft-lateralstrike-slipsenseinthelowerpartofthelithosphere（thelowercrustandlithosphericmantle,60-120kmdeep）.Basedonanintegratedstudyofthegeological-geophysicaldataavail-able,theauthorshaveproposedamodelofdeep-seatedmantlediapirandtheassociatedtectonophysicalprocessasthedynamicsourcefortheupliftofthenorthernpartoftheQinghai-TibetPlateau.

简介：为petrogenetic亲密关系和从Obudu高原的ortho角闪岩的原来的大地构造的背景的一个模型从12件代表性的角闪岩样品的geochemical分析用踪迹和稀土元素的元素的分发模式被测试。辨别阴谋，对平均MORB的不兼容的痕量元素的规范的模式，Ba/Nb的低比率(923)并且Ba/Ta(130327)并且另外的geochemical特征建议protoliths是主导地tholeiiticMORB作文。La/Ta的比率的价值(8.1310.8)，Rb/Sr(0.040.07)，Th/U(主要4.435.43)并且Hf/Ta(2.352.88)进一步显示ortho角闪岩表明电子类型MORB特征。这些特征与实质的海洋地板有关分叉的构造边界背景而非边缘的盆构造背景。这个进化模式看起来被限制进步部分融化和一块单个披风源地的分离结晶控制，不问，然而变化由于本地来源异质。tholeiitic岩浆被热点活动最可能在建设性的板块边缘上产生并且随后由于一个职业人员变窄到在西方非洲人古地台和东方撒哈拉沙漠板之间的海洋盆地由subduction相关的low-Ktholeiitic化学修改了。因此，可能的模型是Obudu高原的角闪岩与充实的海中央地板tholeiites的特征代表ophiolitic套房的A，它在一个颠倒的盘子期间被使变形并且变形打手势在平底锅非洲人orogenic事件在Obudu高原以内包含俯冲和碰撞。