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简介：1.Introduction.ThelateMesozoicEastAsiancontincntalmarginwasamobilebeltsimilartorecentcontinentalares,buthadaconsidcrablcwidthmorcthan2,oookm’Thispapcrdcscribcstbegeometryofthemobilebc1t,anddiscusscsthckincmaticsanddynamics-Itwillclarifythatthermalp1umcundcrtbeEastAsiancontincntplaycdanhoportantrolei

简介：Passivecontinentalbordcrlands(Sibcrian,North-ChinaandTarimpaleocontincnts),Ccntral-Asianpa-leooeeanandMarginalupliftwiththcVcnd-CambrinngrabcnshavcbccnrcconstructcdinCentra1AsiaduringtheEarlyCalcdoniantectonicepoch.Pa1eocontinentsinthcVend-Cambrinnperiodwcrccovcrcdwithshallow(shelf)basins.TheSiberia

简介：AfterhavingreadCrustobodGeotectonicsofAsianContinentandAdjacentSeaswrittenbyProf.ChenGuodaetal-,Iamabsorbedinitsstrikingviewpoints,clearclue,abundantproofs,profoundandlastingconsiderationandrichcontents.Theyarechieflyshowninthefollowing:l.Fortheestablishmentandperfectionofthecrustobodygeotectonicsth

简介：ThecontinentalmarginalextensionconceptdevelopedbyChinesegeologistsrecentlymaybeappliedtotheexplanationabouttheCenozoicextensionanddivergentmovementoftheEasternAsiancontinentalmargin.Fromtheviewpointofcontinentalmarginalextension,thispaperdiscussesthedeeptectonothermalmechanismofthetectonicextensionoftheEasternAsiancontinentalmargin.TheEasternAsiancontinentalmarginisanextensionalbeltwithintensivemagmatismandstructuraldeformation,geophysicallycharacterizedbycontinualearthquakesandobviousgeothermalanomaly.SeismictomographicalresultsabouttheEasternAsiancontinentalmarginimplythatthePacificPlateissubductedtowardtheEurasianPlateatalowangleandthedivingPacificPlateliesonthesurfaceofthe670-kmphasetransitionalzone.Weinterpretthisfeaturetoberesultedfromretrogressivesubductionfollowedbycontinentalmarginalextension.Ourthermalmodelingandgeodynamicalcomputationresultssuggestthattheretrogressivesubductionoccurredatabout76Maandthewithdrawalofthetrenchservedtosupplythevolumeforthecontinentalgrowth,whichledtotheformationofthegrowingfrontoftheEasternAsiancontinentalmargin.ThegrowthwidthoftheEasternAsiancontinentalmarginisabout700km.

简介：TheCentralAsianLateMesozoicriftspstem(CALMRS)hasundergonetwostagesofdevelop-ment.TheearlyonespreadallovertheLateJurassicperiodandwasCharactcrizedwiththeformationofvolcano-teetonicstructuresofasubsidencecalderatypeandembryonicriftsvolcanogeneous-terrigenefilling.Volcariitesarerelatedtosubalkalinerbyo

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简介：Themulti-stagegeologicalevolutionandextensivecontinentaldeformationsduringthecourseofitshistorymaketheCentralAsianmetallogenicregion(CAMR)auniqueandcomplicatedlarge-scalemetaldomain.Newgeologicalobservationsandpreciseage-dataallowanimprovedreconstructionofthegeologicalevolutionoftheCAMR.ThispapersummarizesthePaleozoicorogenicevolutionandrelatedoreformationinthecorepartoftheCAMRbasedonthegeologicaldatapublishedbothduringtheSovietperiodandthelastdecades.Fourore-formationprovinces(Altay,BalkhashJunggar,Chu-Yili-Tianshan,andSouthwestTianshan)couldbeclassified.TheBalkhash-JunggarandChu-Yili-Tianshanprovincesarethemajortopicsofthispaper.TheBalkhash-Junggarprovinceconsistsof4hugeore-formingbelts(Zharma-Saur,Tarbahtay-Xiemistay,Aktogay-Baerluke,BalkhashwesternJunggar)with11largeore-collegeareas.TheChu-Yili-Tianshanprovinceconsistsof4hugeore-formingbelts(Alatau-Sairimu,Chu-Yili-Bolehuole,Issyk-Awulale,Kazharman-Nalaty)with22largeore-collegeareas.Formationoflargeore-collegeareacorrespondstoaspecificstageofcontinentalcrustgrowth.ComparisonofgeologyandoredepositsintheCAMRprovidesrichinformationforfutureexplorationandunderstandingofore-formingprocesses.ThePaleo-JunggarOceanclosedatEarlyDevonianintheBalkhash-westernJunggarore-formingbelt.Afterwards,widespreadvolcanic-sedimentaryrocksformedatextensionalstageduetodelaminationofthethicklowercrustformedduringpreviousaccretionaryprocesses.FelsicmagmaintrusioncausedformationofporphyryCu-Audepositat~310Maandrelatedhydrothermalgolddepositsabout10Malater.Forexample,intheHatu-Baobei-SartohayAu-Crore-collegeareaintheBalkhash-westernJunggarore-formingbelt,smallgranitictodioriteplutonsandvariousdykes(312–277Ma)andlargegranitebodies(~300Ma)intrudedintotheDevoniantoEarlyCarboniferousvolcano-sedimentarybasin.Thesemagmaticactivities

简介：Inalargeareaoftheeast—centralAsiancontinentthereisaunifiedseismicnetworksystemcomposedoftwofamiliesoflarge—seismicbeltsthatintersectconjugately.Suchaseismicnetworkinthemiddle—uppercrustisactuallyaresponsetotheplasticflownetworkinthelowerlithosphereincludingthelowercrustandlithosphericmantle.TheexistenceoftheunifiedplasticflowsystemconfirmsthatthedrivingforceforintraplatetectonicdeformationresultsmainlyfromthecompressionoftheIndiaplate,whilethelong-rangetransmissionoftheforceiscarriedoutchieflybymeansofplasticflow.Theplasticflownetworkhasacontrolovertheintraplatetectonicdeformation.

简介：在我们讨论基于含碳二叠的stratigraphic的领域调查预定Paleo亚洲的海洋的最后的闭合的这份报纸，在东南的内部蒙古的序列和沉积环境与它的附近的区域的地质学结合了。研究显示出那在期间在Tianshan-HingganOrogenic系统的东方片断含碳二叠，有对大陆人沿岸浅海的巨大的ENE-NE-trending沉积的盆，通过东南的内部蒙古向东从Ejinqi在西方开始进吉林和Heilongjiang。分发更低在广阔区域含碳是稀少的。晚含碳或二叠的暴烈沉积的岩石unconformably总是躺泥盆纪以上单位。上面含碳中间二叠被沿岸浅海的存款统治并且上面二叠，由大陆人存款。晚含碳二叠没有subduction碰撞造山运动的踪迹，逐渐地暗示盆由缩小和shallowing消失了。另外，是笔记感兴趣Ondor和和Hegenshanophioliticm戠獩畣瑩Τ

简介：EarlyPaleozoicgranodioritehasbeenidentifiedonthenorthernmarginoftheNorthChinacratonintheeastsectionofthecentral-Asianorogenicbelt,whichwaspreviouslyknownasearlyIndosinianinage.ByusingtheLA-ICP-MSmethod,theobtainedzirconU-Pbageis445.62.7Ma,whichrepresentsthecrystallizationageofthegranodiorite.Thegranodioriteneartheeastofthelarge-sizedBilihegolddepositisofthetholeiiteserieswithlowpotassium.Itisquasi-aluminousI-typegranite,enrichedinsodium(Na2O/K2O=7.299.77)andmagnesium(Mg#=0.510.67).TheΣREEvalueisrelativelylow,obviousdifferentiationisshownbetweenLREEandHREEandwithinLREE,andtheEuanomalyislowandnegative(δEu=0.740.91).Intheprimitive-mantlenormalizedspiderdiagramsoftraceelements,thegranodioriteisrelativelyrichinLREEandLILE(Ba,Sr,Th),andstronglydepletedinHFSE(Nb,Ta,TiandP),whichshowsfeaturesofsubductionzonecomponents(SZC).InthediscriminationdiagramsoftectonicsettingsofgraniteforRbvs.(Nb+Y),Rbvs.(Ya+Ta),La/Nbvs.Ba/NbandTh/Nbvs.Ba/Nb,thegranodioriteexhibitstypicalfeaturesofislandarcgranite.ThenormalizedvaluesofKandRbareextremelylow,whilethevaluesofSrandEuareveryhigh,whicharesimilartothoseofislandarcmagmathathasundergonemetasomatismoffluidfromtheoceaniccrust.ThegranodioriteisrelativelydepletedinεHf(t)(5.17.1)andlowinεHf(t)modelages(1089921Ma).IntheεHf(t)vs.age(T)diagram,thedistributionareaofthegranodioriteisaccordantwiththefieldoftheXing'anling-Mongoliaorogenicbelt,whichindicatesthatthemagmaticsourcesaremainlythemixtureofpartialmeltingofwedgedmantlesubjectedtometasomatismoffluidfromtheoceaniccrustandyoungsubstancefromthecrust.ThegranodioriteissimilartothefelsicarcmagmaintheDamaoBanner,BateObon,BoinSumandOrdorSumregions,andtheyaltogetherconstituteanearlyPaleozoicaccretionaryislandarcma

简介：ObjectiveTwoimportantgeologicalissueshavelongbeencontroversialintheXing–MengareaofNorthChina.ThefirstconcernsthefinalclosureofPaleo-AsianOceaninXing–Mengarea,andtheotherconcernsthefoldingandliftingoftheXing-MengTrough.ThefocusofthsesissuesistheLatePermiansedimentaryenvironment,whichis