学科分类
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47 个结果
  • 简介:Goldenrichmentmechanismofore-formingfluidistheessenceofgoldmetallization.Thispapersummarizesthedistinguishingsymbolsofmantlefluidandeffectofcrust-mantlestructureonfluidmovement.Fluidmovingprocessesincludeosmosis,surge,gas-liquidalterna-tionandmutationoffluidspeed.Duringfluidmovement,goldwillbeenrichedgradually.Final-ly,alayeredcirculatorysystemisillustratedinthispaper.

  • 标签: 地壳-地层相互作用 金矿床 聚集运动 富集机制 储集层流动系统
  • 简介:Inrecentyears,thestudyofmantleplumeshasbecomea“hotspot”inearthsciences;enormouspapersanddatahavebeenpublished,andmanymantleplume-relatedquestionshavearisen:DidmantleplumesinthePrecambrianbehavethesamewayastheydotoday?Whataretherolesofplumesintheevolutionoftheearth?Whataretheeffectsofmantleplumesonglobalchangesandmetallogenesis?Theseissuesarefrequentlyencounteredandhotlydebatedinawiderangeofearthsciencefieldssuchastectonicsgeochemistry,geophysics,metallogenesis,

  • 标签: 地球历史记录 热点 地球科学 前寒武纪
  • 简介:MantlexenolithsbroughtupbyCenozoicvolcanicrocksontotheearth'ssurfacemayprovidedirectinformationabouttheuppermantlebeneaththevolcanicregion.ThispaperpresentsthestudyonmantlexenolithscollectedfromHaotivillage,DangchangCounty,GansuProvince,westernChina.Themainpurposeofthestudyistogainaninsightintothethermalstructureandrheologyoftheuppermantlebeneaththeregion.Theresultsshowthattheuppermantleoftheregioniscomposedmainlyofspinellherzoliteatshallowerdepth(52~75km),andgarnetlherzoliteatgreaterdepth(greaterthan75km),insteadofharzburgiteandduniteasproposedbysomepreviousstudies.TheuppermantlegeothermderivedfromtheequilibriumtemperaturesandpressuresofxenolithsfromtheregionislowerthanthatofNorthChina,andissomewhatclosertotheOceanicgeotherm.Thecrust-mantleboundaryisdeterminedfromthegeothermtobeatabout52km,andtheMohoseemstobethetransitionzoneoflowercrustmaterialwithspinellherzolite.Ifwetake1280℃asthetemperatureofthetopofasthenosphere,thenthelithosphere-asthenosphereboundaryshouldbeatabout120kmdepth.Thedifferentialstressoftheuppermantleisdeterminedbyusingrecrystallizedgrainsizepiezometry,whilethestrainrateandequivalentviscosityaredeterminedbyusingthehightemperatureflowlawofperidotite.Thedifferentialstress,strainrateandviscosityprotidesconstructedonthebasisoftheobtainedvaluesindicatethatasthenosphericdiapiroccurredinthisregionduringtheCenozoictime,resultinginthecorrespondingthinningofthelithosphere.However,thescaleandintensityofthediapirwassignificantlylessthanthatoccurringintheNorthChinaregion.Moreover,numeroussmall-scaleshearzoneswithlocalizeddeformationmightoccurinthelithosphericmantle,asevidencedbytheextensiveoccurrenceofxenolithswithtabularequigranulartexture.

  • 标签: 捕虏岩 上包体 热结构 甘肃 流变学 岩石层位学
  • 简介:Thispaperdiscussesthediscriminationprinciples.deductionandmethodsforprobingintothesourcecompositionofmantle-derivedmagma.Themagmatophile(incompatible)sourceelementsarenotalloptimaltracersformantlesourcecomposition.Theratiosoftwostrongmagmatophileelements(D<1)ortheratiosoftwotraceelementswiththesameDvaluearenotcontrolledbytheformationmodeandevolutiondegreeofamagma,butmaintainthecharacteristicsoftheircompositioninmantlesourceregionpriortothemagmaformation.Theratiosarerelatedtodifferentmantle-cruststructuresanddynamics.ThemantlesourcecompositionoftheEmeishanBasaltseriesissimilartothatoftheSouthAtlanticRioGrandeRise-WalvisRidgeBasaltsandBrazilcontinental-marginbasalts.Thismayindicatethatthesebasaltseriesmighthavesimilarsourceregionsandtectonicenvironments.

  • 标签: MANTLE-DERIVED IGNEOUS rocks MANTLE COMPOSITION trace
  • 简介:Platemotionisoneofthemajordynamicsourcesfordeformationinthecrustandthemantle.SincethedeformationinthecrustcanbeobservedbyGPSandgeologicalobservation,thecomparisonbetweenthedeformationofthecrustandthatofthemantlebecomesoneofthemajormethodsavailableforstudyingthecouplingbetweencrustmovementandmantledeformation.RegionalcrustalstrainratetensorvaluesinChina,inferredfromQuaternaryfaultslipratesandearthquakedeformationdatawithinareasofapproximately200×200km,areinterpolatedwithsmooth,continuousfunctions(spline)todetermineaself-consistentmodelvelocitygradienttensorfieldforthepresent-dayChinesecontinent.Intheinterpolationprocess,GPSvelocityvectorsarealsomatched,withinadefinedframeofreference,bythemodelvelocityfield.Thedirectionsofsheardeformationcalculatedfromthemodelvelocityfieldarecomparedwiththefastdirectionsofshear-wavesplittinginferredfromSKSphasesandPnwaves.Theresultsmightrepresentthesheardeformationinmantleandthedeepcrust,respectively.Thereisarelativelylargedifferencebetweentheaveragedirectionofcrustalshearandthatofmantleshearintheareaofactivetectonics,whichmayindicatethatintheseactiveareasthecrustandthemantlemaybedecoupled.

  • 标签: 地壳变形 GPS系统 岩石圈 各向异性 全球定位系统
  • 简介:TheHimalayan-Tibetanorogenistheyoungestandarguablymostspectacularofallthecontinent-continentcollisionalbeltsontheEarth.Therearenotonlynorth-southextrusionsbutalsoeast-westextensionsintheTibetanPlateau.AllthesephenomenaaretheresultsoftheIndianplatesubductingintotheEurasiaplateabout70Maago

  • 标签: 地幔结构 羌塘地体 地壳 拉萨 大陆碰撞带 青藏高原西部
  • 简介:1IntroductionMechanismsoftheearth’shardcrust(crustobody)movementhavebeenhypothesizeda8tide,expansionandcontractionofthccarth,mantleconvection,rotationoftheearth,etc’,whicharenotcloselyreasoneddespiteofthesupportofsomegeologica1facts’Anothcrhypothesis-themantlecreep-flowandgeothermalencrgyconccrvatio

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  • 简介:Objective:Thisstudyaimstoexploretheclinicopathologicfeaturesof112patientswithmantlecelllymphoma(MCL).Methods:Datafrom112MCLcaseswerecollected,andimmunohistochemicalassaywasconducted.Fluorescenceinsituhybridization(FISH)detectedabreakintheCCND1gene.Thet-testwasusedinthestatisticalanalysis.Results:Alltumorcellsinthe112casesexpressedBcell-relatedantigen,including1blastoidsubtypeand1polymorphicsubtype.Amongallcases,106expressedCD5and104expressedcyclinD1.AbreakintheCCND1genewasnotfoundin3caseswithCD5-MCL.IgH/CCND1polyploidwasobservedin2classiccases.Conclusion:MCLisatypeofspecialimmunophenotypicB-celllymphoma.Theprognosesofblastoidandpolymorphicsubtypesarepoor.Specialsubtypesshouldbeclassifiedduringdiagnosis.

  • 标签: B细胞淋巴瘤 病理特征 临床 细胞周期蛋白D1 免疫组化法 荧光原位杂交
  • 简介:ThelateMesozoictwogianteventsthathavesynchronouslyoccurredinthePacificandperipheryarethetectono-magmaticactivitiesoftheCircum-PacificmobilebeltandtheDarwinRise.TheirdynamicsanalysisindicatesthatthegeodynamicsresponsibleforPacificgenesishasbeendrivenbythegravityinstabilitybetweenaPacific-widesuperplumeheadanditslithosphericoverburdenundertheinfluenceofeastwardasthenosphericflowbytheEarthspin.TheworldwideactivationofmaficmagmatismwasinitiatedinthePaleozoicandclimaxedaroundtheJurassic.TheseparatednotworldwidedistributionofthemagmatismontheEarthsuggeststheinhomogeneousreheatingofuppermantle,asrepresentedbythePacific-widesuperplumehead.ThePhanerozoicreheatingthusputforwardtheEarthhistoryintoanewgeotectonicstage,i.e.,thediwastage.

  • 标签: INHOMOGENEOUS REHEATING upper mantle PACIFIC GENESIS
  • 简介:EasternChinaandvicinalseaareas(98°~150°E,5°~50°N)arelocatedinthejunctionzoneofEurasianandPacificplates,anditisalsoprofoundlyinfluencedbythecollisionbetweenIndianandEurasianplates.Weutilizedsurfacewavedatarecordedby35digitalseismicstationsinthearea,extracteddispersioncurvesoffundamental-modeRayleighwavesalong1252pathsbymeansoftime-frequencyanalysisbasedonmultiple-filterandothertech-niques.Thestudyareawasdividedintoagridof1°′1°,groupvelocitydistributionsoffundamentalRayleighwavesbetween10~158sweredeterminedbyOccam¢sinversion.Thesevelocitydistributionsroughlydepictthelateralvariationsofshearwavevelocitiesindifferentdepthranges.WiththedeterminedpurepathdispersionswefurtherinvertedfortheSwavevelocitystructuresalongtwoprofilesfromeasternTibettoPacificOceanandfromSouthChinaSeatoMongolia.Itisfoundthatthelateralheterogeneityisobviousdownto400kmdepth,andthevelocitystructuresarecorrelatedwithtectonicunitsinthestudyarea.

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  • 简介:披风房间淋巴瘤(MCL)是B房间non-Hodgkin淋巴瘤的好攻击的histotype。疾病不知道了痊愈,它为新奇治疗学的代理人推动迫切需要。(CRM1)Chromosomal区域维护1可以在人的瘤形成起一个作用并且用作癌症治疗的一个新奇目标。这研究总结MCL致病并且在贡献MCL致病的几条重要发信号小径的规定决定CRM1的参与,包括房间周期前进,DNA损坏反应,phosphoinositidekinase-3,原子factor-B激活,和chromosomal稳定性的小径。现出症状之前的潜的研究也被介绍在vitro并且在vivo在MCL在MCL房间线和主要MCL房间把CRM1地位与正常B房间,以及CRM1抑制的治疗学的效率作比较,它使这些代理人成为新奇MCL治疗的潜在的目标。

  • 标签: B细胞 淋巴瘤 治疗药物 信号转导通路 核因子-ΚB 发病机制
  • 简介:UppermantleflowbeneaththeNorthwestofChinaanditslithosphericdynamicsJIAN-HUAHUANGI(黄建华);XIA-HUACHANGI(常筱华)andRONG-SHANFUI傅容珊)(...

  • 标签: UPPER MANTLE LITHOSPHERIC DYNAMICS thermal convection.
  • 简介:硅酸盐perovskites((Mg,Fe)SiO3和CaSiO3)被相信是在更低的披风的主要成分矿物质。阶段关系,稳固的答案,铁的旋转状态和与更低的披风perovskite有关的水溶解度具有地球的内部的地球动力学上并且在矿石矿化作用上的大效果。以前的研究显示大量铁结合了铝能合并到镁perovskite,但是这与disproportionation是不和的(Mg,Fe)SiO3perovskite进没有铁的MgSiO3perovskite和六角形的阶段(Mg0.6在地球的更低的披风的Fe0.4)SiO3。MnSiO3是证实强烈在MnSiO3愿望的更低的披风,和增加以磅条件与MgSiO3perovskite与CaSiO3perovskite和完全的稳固的答案形成宽范围固体答案的第一个化学部件影响在MgSiO3和CaSiO3之间的相互的溶解度。铁的旋转状态是深深地取决于Fe3+或Fe2+,的地点职业合成和样品的退火的条件。然而,看起来,在更低的披风perovskite的Fe2+的旋转状态能作为高纺纱被解决中间的纺纱的存在或在perovskite的Fe2+的低旋转状态没被澄清。而且,不同结果也在perovskite为Fe3+的旋转状态被报导了。更低的披风perovskite的水溶解度与它的作文被联系。在纯MgSiO3perovskite,不到500仅仅ppm水被报导。在更低的披风的Al-MgSiO3perovskite或Al-Fe-MgSiO3perovskite提供1100~1800ppm的水。进一步的实验是必要的为perovskite固体答案澄清详细条件,并且为深深地理解地球的内部和矿石矿化作用的地球动力学在不同的层比较不同阶段的水溶解度,到可靠地在共存分析铁的原子价和旋转状态忍受铁的阶段。

  • 标签: 钙钛矿 下地幔 水溶性 固溶体 亚铁 旋转
  • 简介:ExtensivevolcanismisoneoftheimportantfeaturesofCenozoicgeologyinChina.Basedontemporal-spatialdistribution,thevolcanismwasassociatedwiththreemajordifferentgeologicalsettings:1)thecontinentalriftbasaltsinNortheastandNorthChina;2)thetension-faultbasaltsonthecontinentalmarginsofSoutheastChina;and3)thecollision-zonehigh-KvolcanicsintheQinghai-XizangPlateauanditsvicinities.Thecharacteristicsof'depletioninthesouthandenrichmentinthenorth'oftheChinacontinentalmantlearestronglysupportedbyisotopicevidence.TheCenozoiccontinentalcalcharacters,intothefollowinggeochemicalprovinces:1)thedepletedmantleinSouthChina;2)theprimarymantleinNortheastandNorthChina;3)thehybridandtransi-tionalmantleintheregionofShandong,Anhui,JiangsuandnorthernZhejiang;4)thedepletedmantlearoundtheBohaiBayandtheLowerLiaoheRiver;5)theK-metasomaticenrichedmantleinthenorthernpartofNortheastChina;and6)there-cycledenrichedmantleintheancientsubductionzoneintheQinghai-XizangPlateauanditssurround-ings.Thesegeochemicalcharacteristicsonaregionalscalemustbeareflectionofthenatureoflithosphereevolution.

  • 标签: 地球化学 岩石圈 锶同位素 钕同位素 铅同位素 构造环境
  • 简介:VelocitystructureofthecrustanduppermantleinXingtaiearthquakeregion and itsadjacentareaZhi-PingZHU;(祝治平)Xian-KangZHANG;(张称康)Yu...

  • 标签: VELOCITY STRUCTURE lower CRUST UPPER CRUST
  • 简介:在在华中的三个峡水库(TGR)区域下面的外壳的结构的地震研究被地震车站的稀少、不平的分发限制了。增加车站范围,我们从2008~2010在三夏天期间在TGR区域使三成为了一个活动seismologic数组的推广。这里我们沿着通过基于新地震波形,数据和速度建模的中央TGR区域的西方东方侧面的现在的解释由地区性的地震数据抑制了。在在10和20km附近的深度的二个猛烈中间外壳的思考接口在TGR下面被看见。浅反射镜定义Zigui的底部()盆。莫霍思考的振幅是相当弱的新波形数据表演,并且在莫霍下面,在54-km深度附近有一个强壮的反射镜。在TGR区域,莫霍是一个坡度而非一条锋利的边界,是可能的。我们推测在在TGR区域的上面的披风的坡度莫霍和54-km-deep反射镜可以是Qinling的副产品()-Dabie()orogen。

  • 标签: 三峡库区 反射振幅 地震台站 地壳结构 上地幔 地震波形数据