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简介：ThePulangporphyrycopperdeposit,locatedintheGezantectonic-magmaticarcandsouthoftheYidunislandarc,southwestofSanjiangmetallogenicbeltinYunnanprovince,isasuper-largeporphyrycopperdeposit.Duringrecentdecades,thePulangdeposithasattractedwideattentionamonggeologistsbothathomeandabroad.Manypreviousresearcheshavediscussedits更多还原

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简介：HeavymetalconcentrationsweremeasuredintheChangjiangEstuaryanditsadjacentwaters.ResultsfromasystematicsurveyinApril2002toMarch2003indicatethattherangesoftheconcentrationsofdissolvedcopper,lead,zincandcadmiuminthestudywatersare1.01~6.86,0.10~0.39,3.17~9.12and0.011~0.049μg/dm3,respectively.Similartozinc,thebehaviorofdissolvedcopperwasessentiallyconservative,buthighscatterhasbeenobservedforhighsalinitysamples,whichcanbeattributedtothedecompositionormineralizationoforganicmatterbybacteria.Dissolvedleadmayhaveactivebehaviorwithanadditionathighsalinity.Overallconcentrationsofdissolvedcadmiumincreasewithsalinity.Themeanvaluesofthesedissolvedmetalscalculatedforthesurfacewaterswerehigherthanthoseforthemiddleandbottomones.Externalinputsofdissolvedheavymetalstothesurfacewaterswerethelikelyexplanationforthesehighervalues.Themaximumseasonalaveragevaluesofdissolvedcopperandzincwerefoundinsummer,reflectinghigheramountsofriverineinputinthisseason.Incontrast,themaximumseasonalaveragevaluesofdissolvedleadandcopperwerefoundinwinterandthelowestonesinsummer,respectively,whichmightbeassociatedwithacombinationoflowconcentrationwithheterogeneousscavenging.ConcentrationsofthesedissolvedmetalsfoundfortheChangjiangEstuaryfallintherangeobservedfortheotherestuariesbutarenoticeablyhigherthanthosefromuncontaminatedrivers,exceptforcadmium.ComparedwithobservationsfortheChangjiangEstuaryinthelasttwodecades,itisclearthattheChangjiangestuarinewatershasbeencontaminatedwithcopper,lead,zincandcadmiumduringChina'sindustrialization,butconcentrationsofthemhavedecreasedinthelastfewyears.

简介：Lanping-SimaoMesozoic-CenozoicdiwabasinisoneoftheimportantpolymetallicmetallogeneticbeltsinSanjiangarcaUptonow,morethan20mediumandsmall-sizedcopperdepositsand200cop-perorespotshavebeendiscoveredinred-beds(alittleofthemoccurredinPaleozoiestrata).TheymightbeclassificdintothreeorigintyPcs:scdimentary-d

简介：TheYongpingcoppcrdepositissituatedinYansbanCounty,JjangxiProviencc,SouthChina.It’sacopper,sulphur,tungstenandmolybdenumpolymetallicdeposit,andhostedbytheCarboniferousvolcanicsedAnentaryrocksinwhicbYanshaniangraniticporphyries(l35-l6lMa)intruded.Ourstud-jesrevealthemajorconstrainingfactoronmetallogen

简介：LancangriftwhichliesinthcBao-LangcodomesystemofthcwesternYunandiwaregionisaNS-trending,latePalacozoicriftonthcancientland’smargin.ItswestandcastsidesarerisingblockscomposcdofthcLancangformationaIldXimcngforn1ationofmetamorphicrocks,andbclongtogcosyn-clinestructurallatcr.lnlatcrpa1acozoic,NS-trending

简介：ThreemajortypesofOrdovicianintrusive-relatedgold-copperdepositsarerecognizedincentral-westNewSouthWales,Australia:porphyry,skarnandhighsulphidationepithermaldeposits.ThesedepositsaremainlydistributedwithintwoOrdovicianvolcano-intrusivebeltsoftheLachlanFoldBelt:theOrange-WellingtonBeltandtheParkes-NarromineBelt.AvailableisotopicagedatasuggestthatmineralizationofthethreetypesofdepositsisessentiallycoevalwiththeOrdovicianintrusiverocks(480-430Ma).Porphyrygold-copperdepositscanbefurtherdividedintotwogroups.Thefirstgroupisassociatedwithmonzoniteshowingshoshoniticfeatures,representedbyCadiaandGoonumbla.Thesecondgroupisassociatedwithdioriteanddacite,includingtheCopperHillandCargogold-copperdeposits.GoldskarnisassociatedwithLateOrdovician(430-439Ma)monzoniticintrusivecomplexesintheJunctionReefsarea(Sheahan-Grants,Frenchmans,andCor-nishmens),Endeavour6,7and44,BigandLittleCadia

简介：1.Introdution:Thestudiedoredepositislocatedinthebeltofpolymetallicoredepositsinthemiddle-lowcourseoftheYangtzeRiver,andTanchcng-LujiangandXiaotian-Mozhitandeepfracturezoneslieinthewestadsouthpartoftheoredepositrcspectivcly.Lujiang-Zhongyangvolcanicbasin(theMesozoicEra)liesineast,andtheoredistrictisa

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简介：Emeishan大陆人洪水暗岩，在云南，贵州和西南中国的四川省普遍，是一根二叠的披风羽毛的火山喷出物，并且与暗岩联系的本国的铜辉铜矿矿化作用在云南和贵州省的边阶区域是很普通的。矿化作用发生在凝灰岩置闰和在暗岩爆发的主要时期期间被形成的陆上的沉积岩置闰。矿体被stratigraphic位置和差错控制。在矿石的金属矿石矿物主要是本国的铜，辉铜矿和tenorite，与黄铜矿，bomite，黄铁矿和孔雀石的小数量，并且有时与大量沥青，碳和植物碎片。几十年矿床在二个省的附近的区域是分布式的，当他们中的大多数是小规模的存款或仅仅矿石出现时。由把矿石的铅同位素组成与各种各样的时期的墙岩石，盖子和基岩的作比较，在这类矿床的铜的来源在这篇论文被学习。结果显示出那：(1)从十存款的矿石的Pb同位素组成从上面的部分与上面的二叠的Xuanwei形成，更低的二叠的系列的石灰石和含碳的、寒武纪的沙岩页岩的siliceous-argillaceus岩石和直肠沉积的岩石和白云石的绝对不同中央原生地Kunyang组。这显示矿石铅既不从盖子岩石也不从基岩被导出；(2)尽管Neo原生地Siman白云石和硅石清淡，并且在Kunyang组的更低的部分的白云石在到在这些岩石中的矿石，领先和铜内容的Pb同位素组成是类似的是很低的，他们没做大贡献到铜矿化作用；(3)矿石作为暗岩有一样的Pb同位素组成，后者在铜正在被充实。这些事实显示铅和铜从暗岩被导出。根据地区性的地质的数据和矿床的geological-geochemical特征，形成矿石的材料从暗岩外面被沥滤，这被建议。厚度和暗岩和地区性的构造动力学的埋葬的深度能影响大规模铜存款的形成。因此，在有大厚度的发达暗岩的地方，为这类矿床的探索应该从西方的云南在区域被进行到西方的四川，�

简介：在Ninglang的Tongchanghe本国的铜辉铜矿存款在西方的云南的low-Tibasalts发生，并且充满差错的&交代作用metallogenesis的模式显示这存款具有迟了阶段的热水的起源。这使定义形成矿石的材料的来源更复杂。这篇论文介绍喜玛拉雅的alkali-richporphyries的Pb同位素数据，地区性早中间原生地变质岩地下室和在有一次尝试到的西方的云南的采矿区域的岩石的各种各样的类型在Ninglang抑制Tongchanghenative铜辉铜矿存款的起源。结果证明矿石在Pb同位素组成是相对同类的，暗示简单形成矿石的材料来源。在喜玛拉雅的充满碱的斑岩的Pb同位素的比率的三个集合都比矿石的那些高；地区性的地下室变质岩表演在Pb同位素的比率的大量变化，与矿石铅的同位素组成相当不同；三叠纪的沉积岩和泥石头和淤泥石头的Pb同位素组成内部在晚二叠的HeinishaoFormation的床(相应于向前玄武岩的爆发骑车)在采矿，区域有放射产生的铅的特征并且与矿石铅的同位素组成显著地不同；象矿石一样，在地区性散布的采矿区域和那些的Emeishan暗岩拥有一样的Pb同位素组成，显示出关于他们的分发范围的完全的重叠。从上面，可能性能被排除Tongchanghe存款的ore-formingmaterials从地下室被导出，许多喜玛拉雅的magmaticactivities，等等。形成矿石的材料主要从theEmeishan暗岩被导出，这从而被定义。从可得到的数据，发生在Emeishan暗岩分布式的区域的本国的cupper-chalcocite-typemetallogenesis让一样的金属采购著名计算机生产厂商，这被推出他Tongchanghe沉积物。

简介：Theplatinum-groupelementgeochemistryofrocksandoresfromJinchuansuper-largecopper-nickelsulfidedepositissystemicallystudiedinthispaper.TheCu/PdmeanratioofJinchuanintrusionisloweronislowerthanthatoforiginalmantlemagma,whichindicatesthattheseultrabasicrockswerecrystallizedfromtPdintheformofmeltingsegregationofsulfides.ThePGEoftherocksshowtrendofpartialmelting,similartothatofmantleperidotite,whichshowsthatmagmaformationoccursduringcksandoresarewellrelatedtoeachother,whichsignifiesthesignaturesofmulti-episodemagmaticintrusion,meltingandiationintheformationprocessesofrocksandores.Inaddition,analysesabouttherelationbetweenPGEandS,andstudyonRe-OsisotopesindicatethatfewcontaminationofthecrustalsubstancescrustalsubstanceshelpstosupplypartoftheSfortheenrichmentofPGE.Meanwhile,thehydrothermalprocessadvantageousfortheenrichmentofPGE,especiallyforPtandPd,duetodeepmeltingsegregation.Thecharacteristicparameters(suchasPt/(Pt+Pd),(Pt+Pd)/(Ru+Ir+Os),Pd/lr,Cu/(Ni+Cu),andsoon.)forplatinum-groupelementsforJinchuansulfidecopper-nickeldepositshowthesamefeaturesasthoseforsulfidecopper-nickeldepositrelatedtobasicmagma,whichalsoillustratesitsoriginalmagmapropertyrepresentativeofMg-hightholeiite.Therefore,itisthemafic(notultramafic)magmathatresultedintheformationofthesuperlargesulfidecopper-nickeldepositenrichedinCuandPGE.Tosumup,thegeochemicalcharacteristicsofplatinum-groupelementsinrocksandoresfromJinchuancopper-nickelsulfidedepositareconstrainedbythecontinentalrifftectonicenvironment,theparentmagmafeatures,theenrichedmantelmagmasource,thecomplexmetallogenesisandPGEgeochemicalsignatures,andthiswouldberathersignificantforthestudyaboutthegeneticmechanismofcopper-nickelsulfidedeposits.

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：Byusingthe40Ar-39ArchronologicalmethodtodateK-feldsparfromK-feldspargraniteintheQiaohuotecopperdistrict,theauthorsobtainedaplateauageof274.78±0.44Maandanisochronageof272.7±3.0Ma.BecausethereisnotectonicdeformationoverprintedorhydrothermalalterationintheK-feldspargraniteintrusionafteritsemplacement,the40Ar-39AragerepresentsthecrystallizationageofK-feldsparinK-feldspargranite,i.e.thelatecrystallizationageoftheK-feldspargraniteintrusion,whichindicatesthattheK-feldspargraniteformedintheintraplateextensionalstageduringtheEarlyPermian.Moreover,basedonthespatialrelationshipbetweentheK-feldspargraniteintrusionandcopperorebodies,variationsofcopperoregrade,REEcharacteristicsofK-feldspargraniteandcopperores,andHandOisotopiccompositionsoffluidinclusionsincopperores,themetallogenesisoftheQiaohuotecopperdepositisdirectlyrelatedtointrusiveactivitiesoftheK-feldspargranite,andthusthecrystallizationageofK-feldsparinthegraniteapproximatelyapproachesthemetallogenicepochoftheQiaohuotecopperdeposit.

简介：根据地质并且geochemical学习包括体积岩石的化学分析，稀土元素并且痕量元素研究，液包体，和S和Oisotopic分析，作者详细描述了存款的地质的背景并且为Shaxi斑岩铜黄金存款的形成的条件介绍了重要证明。与在中国和邻近的Cu-Au的另外的大、晚饭大的斑岩铜矿床相比，使矿物化的区域，形成矿石的过程和条件被分析；并且在Shaxi区域形成大斑岩铜矿床的可能性被讨论。现在的学习显示形成矿石的液体和材料主要具有magmatic起源，当天落水在形成矿石的过程起了某个作用时。自从侏罗记，在潜水艇ducting和制服的盘子之间的相互作用在华东为火成岩和金属元素的免职的形成提供了一个主要驱动力。基于Shaxiintrusive的geochemical数据，铜(黄金)矿化作用是，这被发现仔细与在Shaxi区域恼人的象adakite一样的开始有关。这象adakite一样intrusive向华东大陆由于西方太平洋板的俯冲在俯冲环境被形成，在有形成一张大斑岩铜矿床的一个大潜力的地方。