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简介:WestudiedthestatesofrareearthelementsinoreoftheXianglushanrareearthdeposit.Rareearthoresamplesweretestedandexaminedbyscanningelectronmicroscope,electronprobe,andchemicalleaching.Noindependentrareearthmineralsweredetectedbyscanningelectronmicroscope.Elementsdetectedbytheelectronicprobefortheinsitumicro-zoneofthesampleincluded:O,Al,Si,Ca,Mg,Fe,Ti,K,Na,S,Cl,C,Cu,Cr,V,andPt.Rareearthelementswerenotdetectedbyelectronprobe.(NH4)2SO4,(NH4)Cl,NaCl,andH2SO4wereusedasreagentsinchemicalleachingexperimentsthateasilyleachedoutrareearthelementsundertheactionof10%reagent,indicatingthattherareearthelementsinorearemainlyintheionicstateratherthanpresentasrareearthminerals.
简介:Inrecentyears,thestudyofmantleplumeshasbecomea“hotspot”inearthsciences;enormouspapersanddatahavebeenpublished,andmanymantleplume-relatedquestionshavearisen:DidmantleplumesinthePrecambrianbehavethesamewayastheydotoday?Whataretherolesofplumesintheevolutionoftheearth?Whataretheeffectsofmantleplumesonglobalchangesandmetallogenesis?Theseissuesarefrequentlyencounteredandhotlydebatedinawiderangeofearthsciencefieldssuchastectonicsgeochemistry,geophysics,metallogenesis,
简介:地球作为triaxial被花僵硬身体,它在欧几里得的空格自由地旋转。开始的方程是Euler动态方程,与比比C的B和esmaller小的A。Euler方程被解决,并且数字结果被提供。在计算,下列参数被使用:(C~B)/A=0.00327353;(B-A)/C=0.00002196;(C-A)/e=0.00329549,并且地球的旋转的吝啬的尖速度,co=0.00007292115rad/s。计算证明除地球和它的旋转的免费Euler行列的自我旋转以外,那在那里存在免费点头:在theEarth的片刻的旋转轴和周期性地随着时间变化的吝啬的轴之间的点头角度,或角度。免费点头被调查。
简介:Sponsoredby:ChineseAcademyofSciencesNationalNaturalScienceFoundationofChinaPublishedby:ScienceinChinaPressChairman:ZHOUGuangzhao(ZhouGuangZhao)Editor-in-Chief:SUNShuExecutiveEditors:CHENYongMAZongjinOUYANGZiyuanSUJilanSUNHonglieWANGPinxianZHOUXiuii
简介:Theinterdisciplinaryfieldrespondstotheneedtobetterof"MedicalGeology"understandtherelationshipsbetweenhumanhealthandoursurroundingenvironment.Theinfluenceofearthresources,naturalenvironmentalfactorsandland-useonhumanhealthhaslongbeenrecognized,datingbacktoancientRomeandPeru'sIncacivilization.Todaylinksbetweenthenaturalenvironmentandhealthcanbefoundthroughouttheworld.Thisreviewintroducesthehistoricalcontextofthisparticulartypeofresearch,contraststhedirectgeologicalandindirectnaturalhazardinfluencesonhealthasaframeworkofstudy,elaboratesonpathwaysofelementalaccumulationinthebodyandprovidesexamplesofspecificgeochemicalbehavioursanddiseasesthatareoftenassociatedwitheithertoomuchornotenoughofcertainelementswhichcomprisetheEarth.
简介:现在的学习试图扩大旋转对称的地球的传统的旋转理论到triaxial地球。我们再用形式表示为triaxial的Liouville方程和他们的一般解决方案非刚性的土并且发现传统的理论在为刺激函数建模介绍一些理论错误。而且,我们把那个理论用于大气的刺激并且发现理论错误不应该被忽视给现在的测量精确性。因此,我们断定旋转对称的地球的旋转的传统的理论应该被修订并且升级了包括地球triaxiality的效果。
简介:线性Gutenberg-Richter关系是生长得很好的。在地球的任何区域,地震的数字的对数,比任何大小大,与大小成正比。这意味着内在的物理非线性、不完全有弹性。这个非线性的物理没被解决。这里,我们建议液体岩石变丑的新理解提供位于Gutenberg-Richter下面的物理:在situ的在几乎所有的浸透液体的microcracks摇的地方,是那么空间得仔细的他们接近失败和破裂,并且因此是批评系统的它在常规亚critical地球物理上强加根本上新的性质。在moonquakes的线性Gutenberg-Richter关系的观察建议剩余液体在月亮在深度存在。
简介:1IntroductionTheweatheredcrustrareearthdepositsisoneofthemostsignificantrareearthdeposits,whicharemostlydistributedinsouthernChina,especiallyinthesouthofJiangxiprovince(Chietal.,2007).Thecompositionsofthesedeposits,whichareweatheredfromigneousrockssuchasgranitethroughbiological,physicalorchemical