简介:
简介:Avolcano-platformcarbonatesequence,fromCarboniferoustoPermian,iswidelytrappedinthedeepwaterdepositsinChangning—Menglianbelt.Threecomponentscanberoughlyrecognizedinas-cendingorderas:thelava,thevolcaniclasticandcarbonaterocks.Inmostcases,thesequenceisincompleteduetofaultingresultedfromthestrongorogeniccompression.Butthestratigraphicsuccessioniscontinu-ousexceptforthetwointerruptionsofpaleokarsts,whichextendedfrommiddleLateCarboniferoustoLatePermianandfromlateEarlyPermiantoLatePermianrespectively.Apreliminarystudyindicatesthatthestratigraphy,petrology,sedimentation,volcanismgeochemistryandfossilsinthesequencearequitesimilartothatinmodemandancientoceanicislandsandtheremaybetherelicsofancientoceanicislandsinthepaleo-Tethys.Thedifferencesamongthesesequencesprobablysuggestacomplexconfigu-rationoftheislandsorislandchainTheseislandswereformedunderintra-oceanicenvironmentsofthepaleo-Teth
简介:西方的云南位于在Gondwana和劳亚古大陆之间的一个巨大的Tethyserogenic地区以内。联系威尔森orogenic周期的Magmatic活动记录证明板在这个区域传播的原因可能与亚披风羽毛有关。Tectonics,地球物理,沉积阶层,岩石圈的构造进化和另外的研究结果显示为在韦斯特云南的披风羽毛magmatic活动有地质的证据。断层摄影术也支持在韦斯特云南红河差错和一根upwelling披风羽毛附近有一个subducting平板的想法。这里,我们的研究为upwelling披风羽毛介绍地震证据,它是在韦斯特云南导致subducting平板的一个主要原因。分析基于变换的compressional-to-shear(P-to-S)地震阶段,在四川云南地震网络在地震计上记录了车站,并且在410-km和660-km断绝上,以及在叠的CCP的三节上做了研究。
简介:ThispaperdiscussesthelateYanshanian-Himalayanigneousrockseriesandminerogeneticseries(Chengetal.,1979,1982)relatedtotinpolymetallicdepositsintheTengchongarea.Themulti-stagedifferentiationandevolutionoftheigneousrockseriesledtotheconcentrationofmetalandore-formingelementsinacupolaofagranitebodyformedinthelatestage.TheminerogeneticseriesshowsazoningofNb-Ta-W-Sn,Sn-FeandSnaroundthecupolainspaceandamulti-stageregularityintime.Finallyaminerogeneticmodelandthreekeyfactorsoftinminerogenesisareputforwardfortinpolymetallicdepositsinthearea.
简介:摘要:一条新mamenchisaurid恐龙,Eomamenchisaurusyuanmouensis情报etsp。nov。从Zhanghe形成基于一架不完全的骨骼被树立,Yuanmou的中间的侏罗记,云南省。新taxon被pleurocoels的缺席与稍微凸的前面的关节的表面在背面的vertebrae和背面的verterbrae描绘,中等凹面以后的关节的表面;第四trochanter在腿节上posteromedially被开发;到腿节的胫骨的长度比率是约0.64;并且坐骨的柄是像杆的。以后的背面的vertebrae的二熔化centra(假定第9并且第10背面的vertebrae)类似于在另外的mamenchisaurid恐龙的那些包括Mamenchisaurushochuanesis,M。youngi和Chuanjiesaurusanaensis。因此,centra的熔化第九并且第十背面的vertebrae能作为Mamenchisauridae的一个synapomorphic人物被认出。
简介:TheLancangjiangtectoniczoneinWesternYunnanisanimportantmagmatic,metamorphicandtectonicmobilezoneofSouthwesternChina,whosegeotectoniclocationisveryunique.Itischaracterizedbycomplexgeologicalstructures,perfectlydevelopedstrata,frequentmagmaticactivities,,variousdegreesofmetamorphism,richoreresourcesandlotsofmetaldeposits,thusformedacentralizedzoneofmineralizationandalsoconstitutedoneoftheimportantmetallogenicbeltsofnobleandnonferrousmetaldeposits.
简介:ApplyingthecrustobodygeotectonictheorytogeologicalprospectingattheLancangjiangrivermetallogenicbeltinwesternYunnanprovince,andonthebasisofthebasicgeologicalbackgroundofwesternYunnanandthespace-timeevolution-movementhistorical-dynamicfeaturesoftheLancangjiangrivertectonicbelt,theauthorhasdiscussedfirstlythemetallogenesisoftheLancangjiangrivertransitionalfieldtectoniczone,whichcanprovideanewtheoreticalfoundationforexploringthespace-timelawsofmineralizationinthisregion.
简介:1IntroductionTheMaozuPb–Zndeposit,locatedintheNortheastofYunnanProvince,southwestChina,isatypicalcarbonate-hosteddepositintheNortheastofYunnanPb–Znmetallogenicprovince.Fluoriteisthemaingangue
简介:Withanexploitationliistoryofmorctban500years,LaocliangorcdepositinLancliang,Yunnanisaparticularlylarge(possiblysuperlarge)oneofAg,Pb,Th,Cu,S,Au,etc.TectoniCally,itis1ocatedalmostinthesouthcmendofBaolangeodomespetemofWcsternYunnandiwaregion(ChenGuoda,1977)’StrataexposedintheminjngrraionareDevonisnSgn
简介:DepositionalEnvironmentsofBeddedChensinWesternYunnanSegmentofPaleo-Tethys,China:aGeochemicalApproach¥HeFualang;ZhongDaiai(Lab...
简介:ThePulangporphyrycopperdeposit,locatedintheGezantectonic-magmaticarcandsouthoftheYidunislandarc,southwestofSanjiangmetallogenicbeltinYunnanprovince,isasuper-largeporphyrycopperdeposit.Duringrecentdecades,thePulangdeposithasattractedwideattentionamonggeologistsbothathomeandabroad.Manypreviousresearcheshavediscussedits更多还原
简介:Lanping-SimaoMesozoic-CenozoicdiwabasinisoneoftheimportantpolymetallicmetallogeneticbeltsinSanjiangarcaUptonow,morethan20mediumandsmall-sizedcopperdepositsand200cop-perorespotshavebeendiscoveredinred-beds(alittleofthemoccurredinPaleozoiestrata).TheymightbeclassificdintothreeorigintyPcs:scdimentary-d
简介:在结晶化以后沿着Yangtzecraton和他们的变形历史的西方边缘澄清变形侵入的关系,石油化学并且踪迹元素geochemical人物,标明日期的锆石虾U-Pb,和化学药品从在Kangding的Neoproterozoic变形侵入的共存的角闪石和斜长石的作文(),四川()省,和Yuanmou(),云南()省,被学习。与以前的出版数据结合了,在Yangtzecraton的西方边缘的Kangding花岗石的plutons和Yuanmou建筑群通常在一样的句号形成了,这被显示。在700妈的变形事件广泛地存在,至少在四川从Kangding区域盖住到Eshan()在中央云南的区域。而且,角闪岩外形可以代表山峰地区性的变形状况。
简介:LancangriftwhichliesinthcBao-LangcodomesystemofthcwesternYunandiwaregionisaNS-trending,latePalacozoicriftonthcancientland’smargin.ItswestandcastsidesarerisingblockscomposcdofthcLancangformationaIldXimcngforn1ationofmetamorphicrocks,andbclongtogcosyn-clinestructurallatcr.lnlatcrpa1acozoic,NS-trending