简介：InNo.50kimberlitepipeofFuxianCounty,LiaoningProvince,aneclogiteinclusion(nodule),whichisextremelyrareinkimberlites,wasdiscoveredandphlogopiteexsolutionlamellaewerefoundingarnetsoftheinclusion.Microscopic,TEMandenergyspectralobserva-tionsandstudiesconfirmedthattheselamellaearephlogopite.Theyarecolourlessandacicularinsection,generally0.5-5μminwidthand10-100μminlength.Nevertheless,finelamellae,0.05-0.1μmwideand1-2μmlong,arealsowelldeveloped.Along[111]ofthegarnet,threesetsofphlogopitelamellaeshoworientedarrangementapproximatelyatanglesof60°-70°,indi-catingthattheselamellaemightbetheproductofexsolutionfromgarnetasaresultofpressure-releasewheneclogiteascendedfromtherelativelydeepleveltotherelativelyshallowlevelofthemantle.Tinyacicularexsolutionminerals(orinclusions)arecommonlyfoundingarnetandpyroxeneineclogiteinclusionsofkimberlitesallovertheworldandithasbeenre-portedthattheidentifiedexsolutionmineralsincludepyroxeneandrutile.Thisisthefirsttimethatphlogopiteexsolutionlamillaewerefoundineclogiteinclusionsintheworld.

简介：Wudalianchi(五大连池)火山是有在东北中国的相当好的暴烈的风景的著名的第四级的。暴烈的岩石是有47.3wt.%的SiO2内容的电唱机碱玄岩，tephri响岩，trachyandesite，和玄武岩的trachyandesite54.2wt.%。高K2在Wudalianchi暴烈的岩石中的O内容建议他们可能分享普通钾的岩浆来源。，Wudalianchi暴烈的岩石的岩浆进化是类似的Laoheishan的新爆发产品(老黑山)和Huoshaoshan(火烧山)火山是稍微，更多比旧爆发材料演变，即，新爆发在的岩浆17191721从上述二座火山是在地下的房间的发展岩浆。Wudalianchi暴烈的岩石的主要斑晶是橄榄石，clinopyroxenes，和一些典型K富有的白榴石。各种各样形状融化包括从Laoheishan和Huoshaoshan火山的新爆发产品在橄榄石斑晶被发现。由电子，分析的微探查(EMP)，SiO2的内容和全部的碱显示出一个宽范围，建议pre暴发的岩浆可能是更复杂的，或melt包括是unhomogeneous。根据EMP结果，排除的硫从这评价，这被相信新爆发比Tianchi的千年爆发的高得多(天池)火山，当时排除的氯率是比Tianchi的低的大小火山。

简介：RareelementmineralizedgranitesoftheYanshanperiodinSouthernChinaarecharacterizedbyhighcontentsofSiO2,Na2O,O,K2O,andFandareenrichedinNb,Ta,REE,W,Sn,BeandLi.Opinionsdif-feredoverwhethertheyareofmetasomaticormagmaticorigin.Inthispaper,wepresentresultsofastudyonmeltandfluidinclusionsintopaz-albitefeldspargranitefromLimoNb-Ta-W-Sngraniteand414Ta-Lialbitegranite.Ourdata,whichcomefrom15mineralizedgranites,providestrongsupportmagmaticorigin.Meltinclusionsarerecognizedinbothtopazandquartz,andareassociatedwithprimarygas-richinclusions.CrystallitesofaNb（Ta）-bearingmineralandcassiteritearealsocommonlypresentasinclusionsinthetopaz.Multiphase（melt+fluid）inclusionsareobservedinsomequartzfromgranitesandgranite-relatedpegmatite.Meltinclusionsstarttomeltatatemperatureofapproximately540℃intopazand650℃inquartz.Finalhomogenzationtemperatureis700-900℃inquartz,700-800℃intopazand440—550℃forpri

简介：Forthefirsttime,fluid-meltinclusionsarefoundinfluoriteoftheHuanggangliangskarniron-tindeposit(HSID).Thefluoritewasformedinthemainstageofmineralization,namedthehydro-skarnizationstage.TheinclusionscontainvariouscomponentssuchasFe,MgandCrfromdeepsources.ThemeltsofprimaryinclusionsaremainlyCa-andF-richandthoseofsecondaryinclusionstendtobecomeSi-rich.Duringthisevolutionprocess,themeltsandirondaughtermineralsdecreasedandevenvanished.ThesefactsrevealthattheevolutionoftheprimarymineralizingfluidsandthedifferentiationofthefluidsandmeltsarethemainfactorsleadingtothedepositionofFe,Snandotherelements.ThisdiscoveryconfirmsthemagmaticgenesisoftheHSIDandhasfilledinthegapsintheresearchofmagmatogenicskarndepositsandfurnishednewmethodsforsuchresearch.Furthermore,ithasenlargedthescopeoftheresearchonfluidinclusions.

简介：ThedensitiesofCO_2inclusionsinmineralsarecommonlyusedtodeterminethecrystallizingconditionsofthehostminerals.However,conventionalmicrothermometryisdifficulttoapplyforinclusionsofsmallsize(<5-10μm)orlowdensity.RamananalysisisanalternativemethodfordeterminingCO_2density,providedthattheCO_2density-Ramanshiftrelationisknown.ThisstudyaimstoestablishthisCO_2density-RamanshiftrelationbyusingCO_2inclusionssynthesizedinfusedsilicacapillaries.Byusingthisnewly-developedsynthetictechnique,weformedpureCO_2inclusions,andtheirdensitiesweredeterminedbymicrothermometry.TheRamananalysisshowedthattherelationbetweenCO_2density(Ding/cm3)andtheseparations(△incm~(-1))betweenthetwomainbands(i.e.Fermidiadbands)inCO_2Ramanspectracanberepresentedbyacubicequation:D(g/cm~3)=0.74203(-0.019⊿~3+5.90332⊿~2-610.79472⊿+21050.30165)-3.54278(r~2=0.99920).OurcalculatedDvalueforagiven⊿isbetweenthoseobtainedfromtwopreviously-reportedequations,whichwerederivedfromdifferentexperimentalmethods.AnexamplewasgiveninthisstudytodemonstratethatthedensitiesofnaturalCO_2inclusionsthatcouldnotbederivedfrommicrothermometrycouldbedeterminedbyusingourmethod.

简介：Voluminousplatinum-groupmineral（PGM）inclusionsincludingerlichmanite（Os,Ru）S2,laurite（Ru,Os）S2,andirarsite（Ir,Os,Ru,Rh）AsS,aswellasnativeosmiumOs（Ir）andinclusionsofbasemetalsulphides（BMS）,includingmillerite（NiS）,heazlewoodite（Ni3S2）,covellite（CuS）anddigenite（Cu3S2）,accompaniedbynativeiron,havebeenidentifiedinchromititesoftheZedangophiolite,Tibet.ThePGMsoccurasbothinclusionsinmagnesiochromitegrainsandassmallinterstitialgranulesbetweenthem;mostarelessthan10μminsizeandvaryinshapefromeuhedraltoanhedral.Theyoccureitherassingleorcomposite（biphaseorpolyphase）grainscomposedsolelyofPGM,orPGMassociatedwithsilicategrains.Os-,Ir-,andRu-richPGMsarethecommonspeciesandPt-,Pd-,andRh-richvarietieshavenotbeenidentified.SulfurfugacityandtemperatureappeartobethemainfactorsthatcontrolledthePGEmineralogyduringcrystallizationofthehostchromititeintheuppermantle.Iftheactivityofchalcogenides（suchasS,andAs）islow,PGEclusterswillremainsuspendedinthesilicatemeltuntiltheycancoalescetoformalloys.Underappropriateconditionsof?S2and?O2,PGEalloysmightreactwiththemelttoformsulfides-sulfarsenides.Thus,wesuggestthattheOs,IrandRumetallicclustersandalloysintheZedangchromititescrystallizedfirstunderhightemperatureandlow?S2,followedbycrystallizationofsulphidesofthelaurite-erlichmanite,solid-solutionseriesasthemagmacooledand?S2increased.TheabundanceofprimaryBMSinthechromititessuggeststhat?S2reachedrelativelyhighvaluesduringthefinalstagesofmagnesiochromitecrystallization.ThediversityofthePGEminerals,incombinationwithdifferencesinthepetrologicalcharacteristicsofthemagnesiochromites,suggestdifferentdegreesofpartialmelting,perhapsatdifferentdepthsinthemantle.Theestimatedparentalmagmacompositionsuggestsformationinasuprasubductionzone