简介：Ultramafichypoxenolithsfoundinthealkali-richporphyryintheLiuheVillage,Heqing,Yunnan,China,areofgreatsignificanceinunderstandingtheoriginandevolutionoftheporphyry.Thispaperdiscussesthemineralogicalfeaturesofthehypoxenoliths.Itshowsthatthexenolithsarecharacterizedbytheuppermantlerocksmodifiedtocertainextentbytheenrichedmantlefluidmetasomatisminthemantleenvironment,withtheenrichedmantlepropertyofIow-degreepartialmelting.Thisconstitutestheimportantmineralogicalevidenceforthepetrogenesisandmineralizationofalkali-richporphyry.

简介：TheYinyanporphyrytindepositisablinddepositassociatedwithasmallgraniteporphyrystock.ThepetrologyandgeochemistryoftheYinyangraniteporphyrysuggestthatitisgeneticallyofthetransfor-mationtype,emplacedatthelatestageoffractionalcrystallizationwithinahigh-levelmagmachamber.Ore-formingfluidsarederivedpredominantlyfromthegraniticmagmaandtheyinteractwiththewallrocksintenselywhenfindingtheirwayupwardsthroughthegraniteporphyry.Fromthelowerpartoftheporphyryupwardsthefollowingalterationzonescanbedistinguished(a)slightlyalteredgraniteporphyry(withweakpotashfeldspathization),(b)protolithionite-quartzgreisenizationzone,(c)to-paz-quartzgreisenizationzone,(d)senicite-quartzsericitizationzone,and（e）silicificationzone(quartzcoreatthesurface).Tinmineralizationisrelatedtogreisenization,especiallytotopaz-quartzgreisenization.Rockandore-formingtemperaturesandoxygenfugacitiesareestimated,respectively.TherearesignificantdifferencesinmanyaspectsbetweentheYinyanporphyrytindepositandvolcan-ic-subvolcanicporphyrytindeposits.

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：RecentexaminationandassessmentabouttheporphyrycopperdepositsinGangdisemetallogenicbeltinsouthernTibethaverevealedthattheseporphyrycopperdepositsarehighlyprospective.SeveralmethodshavebeenusedfortheisotopicdatingoftheQulong,TinggongandChongjiangporphyrycopperdeposits,whichgivesoutapetrogeneticageof17.58±0.74Ma(single-zircondatingofSHRIMP),ametallogeneticageof15.99±0.32Ma(Re-Osisochrondating)andanalterationagerangingbetween12.00Maand16.5Ma(K-Ardating).Themetallogeneticageisingeneralagreementwiththealterationage.ItcanbeseenthatthepetrogeneticandmetallogeneticagesfortheporphyrycopperdepositsinGangdisemetallogenicbeltarenoticeablylaterthantheageforthecollisionalgraniticintrusioninthisbelt.Theauthorscontendthattheporphyrycopperdepositsinthestudyareawereformedinapost-collisionalextensionaltectonicsetting,andarecloselyrelatedtothedelaminationofthemountainrootsoftheorogenicbeltsandtheupliftingoftheQinghai-TibetPlateau.

简介：Itisawellknownfactthatmagnaticcryoto-explosion,asaspeeialformofmagmatismunderthenear-surfacecondition,hasacloseconncctionwithcdogcnicmctaldcposits,particularlywiththoseofporphyrytyPe,suchaSporphyryCu-Mo,Pb-Zn,W-SnandUdcposits’However,onlyinrcccntyearsbavetheChineseoregeologistsandpetrologistsgivenin

简介：<正>AfterstudyingsystematicallyPetrology,Mineralogy,Petrochemistry,REEgeochemistryandstrontium,sulphur,leadisotopeofthealkali-richgraniteprophyrydistribuledextensivelytheYangtzeplatfromwesternmargin’salkali-richgraniteporphyrywepointoutthatthealkali-richgraniteporphyryhavethepropertiesofnewintrusiveages,Rangeoftheisotopeageisform36Mato51Ma,theybelongtotheHimalayadate,Mainmineralcomponetsofthealkali-richgraniteporphyryconsistofk-fcldspar(35~45x),quartz(36x±)plagioclase(15x±)andbiotitc(10x±).Accessorymineralsoftherockbelongtotypeof

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

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简介：铂组元素(PGE)的集中从Zhireken，Shakhtama和Aksug斑岩Cu瞬间存款在主要magmatic磁铁矿样品被分析了(西伯利亚，俄国)由激光，决定PGE的范围的脱离诱导地联合的血浆团spectrometry在磁铁矿并且到支票满足从二间主要岩石套房(贫瘠Pluto的套房和使矿物化的斑岩套房)的磁铁矿是否有不同PGE作文。这里介绍的结果显示磁铁矿在PGE被充实相对整个岩石。矿石相关的斑岩和贫瘠Pluto的套房的比较证明磁铁矿在两间套房展出相对类似的PGE分发模式。在Rh和Ru内容的变化被氧易逃逸在岩浆结晶化期间控制。

简介：Geza岛弧是一个著名矿化作用集中区域，在西藏的高原的东方边缘的Sanjiang领域的部分。在最近的年里，几迟了的Yanshanian花岗石的侵入和联系存款在这个区域被发现了，在桃花源，区域是其一最大Laba铝存款。以前的研究建议预定Laba矿化作用是85±2妈。然而，granodioritic斑岩的年龄仍然保持未知。在这研究，从忍受辉钼矿的granodioritic斑岩的三件样品锆石标明日期的LA-ICP-MSU-Pb与85.00±的产生日期一起被进行了0.23妈(MSWD=0.58)，85.28±0.28妈(MSWD=1.12)，并且84.83±0.26妈(MSWD=0.79)分别地，显示这些granodioritic斑岩在∼85附近在迟了的Yanshanian形成了妈。与矿化作用的地质的特征结合了，时间地，Laba存款遗传上空间地与granodioritic斑岩被联系。另外，Laba存款的年龄与另外的迟了的Yanshanian侵入和矿化作用一致，建议矿化作用可能在在迟了的白垩纪期间的intra板extensional环境下面被产生。

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简介：40Ar-39ArdatingofalbitefromtheMeishanandTaocunirondepositsyieldsplateauagesof122.90±0.16Maand124.89±0.30Ma,andisochronagesof122.60±0.16Maand124.90±0.29Ma,respectively.PhlogopitefromtheZhongshan-Gushanorefieldhasaplateauageof126.7±0.17Maandanisochronageof127.21±1.63Ma.Analysisofregionalgeodynamicevolutionofthemiddle-lowerYangtzeRiverregionsuggeststhattheporphyryirondepositswereformedasaresultoflarge-scalelithospheredelaminationandstrongsinistralstrike-slipmovementoftheTanchengLujiangfaultzone.Thecopper,molybdenumandgolddepositsysteminthemiddle-lowerYangtzeRiverregionwasformedduringthestresstransitionperiodoftheeasternChinacontinent.

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。