简介：Inthisstudy,anelectronmicroprobeanalyzer(EMPA)wasusedtomapthespatialdistributionandtheoccurrenceofinvisiblegoldinpyritefromtheLiulinchagoldorebelt.EPMAdatashowthatgoldmainlyoccursassubmicroscopic-microscopicinclusions.FromthecontrastofthemajorguideelementsofpyritefromtheLiulinchagoldorebeltandthosefromfourhydrothermal-typegolddepositsintheJiaodongregion,wecanseethepyriteswereformedintwostages:thepyritefromwallrockismainlysedimentogenic,withsimplestructure;andthepyritefromorebodyexperiencedearlysedimentaryprocesstolatehydrothermalactivity,thepyriteisregularincrystalformandexhibitsfracturedstructure.

简介：Withanexploitationliistoryofmorctban500years,LaocliangorcdepositinLancliang,Yunnanisaparticularlylarge(possiblysuperlarge)oneofAg,Pb,Th,Cu,S,Au,etc.TectoniCally,itis1ocatedalmostinthesouthcmendofBaolangeodomespetemofWcsternYunnandiwaregion(ChenGuoda,1977)’StrataexposedintheminjngrraionareDevonisnSgn

简介：Thestudyoftheregularitiesofspreadingofthetectono-magn1aticactivizationregionsmineralizationisbasedonthefollowingthr(f’t’con-ceptions:1,thatofthesystemnotionofmineralization2.thatoftheacativelayeroftheEarthasthemainsourceofenergyandsubstanceoforeformation3.thatofstagesofdiwastructuresdevelopment1.Ore

简介：DiwabasinsandstonetypecopperdepositsofChinaplayanimportantroleeconomically.Thede-positsarclocatedalongthefringeofadiwabasin.Itsore-bearjngstrataaredepositedinaninlandbasinandcomposedofdarkenedandbIeachedbeds-Bccauseofdiwabasin’sactivity,e1evationandsubsi-dencemovementsoccurfrequent1y.Especially,thcf

简介：Inrecent20years,becauseofthefindingofmanylarge-superlargegolddeposits,werenewthetheoriesforprospectingandgainmanythingsandconceptions.

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

简介：Themulti-stagegeologicalevolutionandextensivecontinentaldeformationsduringthecourseofitshistorymaketheCentralAsianmetallogenicregion(CAMR)auniqueandcomplicatedlarge-scalemetaldomain.Newgeologicalobservationsandpreciseage-dataallowanimprovedreconstructionofthegeologicalevolutionoftheCAMR.ThispapersummarizesthePaleozoicorogenicevolutionandrelatedoreformationinthecorepartoftheCAMRbasedonthegeologicaldatapublishedbothduringtheSovietperiodandthelastdecades.Fourore-formationprovinces(Altay,BalkhashJunggar,Chu-Yili-Tianshan,andSouthwestTianshan)couldbeclassified.TheBalkhash-JunggarandChu-Yili-Tianshanprovincesarethemajortopicsofthispaper.TheBalkhash-Junggarprovinceconsistsof4hugeore-formingbelts(Zharma-Saur,Tarbahtay-Xiemistay,Aktogay-Baerluke,BalkhashwesternJunggar)with11largeore-collegeareas.TheChu-Yili-Tianshanprovinceconsistsof4hugeore-formingbelts(Alatau-Sairimu,Chu-Yili-Bolehuole,Issyk-Awulale,Kazharman-Nalaty)with22largeore-collegeareas.Formationoflargeore-collegeareacorrespondstoaspecificstageofcontinentalcrustgrowth.ComparisonofgeologyandoredepositsintheCAMRprovidesrichinformationforfutureexplorationandunderstandingofore-formingprocesses.ThePaleo-JunggarOceanclosedatEarlyDevonianintheBalkhash-westernJunggarore-formingbelt.Afterwards,widespreadvolcanic-sedimentaryrocksformedatextensionalstageduetodelaminationofthethicklowercrustformedduringpreviousaccretionaryprocesses.FelsicmagmaintrusioncausedformationofporphyryCu-Audepositat~310Maandrelatedhydrothermalgolddepositsabout10Malater.Forexample,intheHatu-Baobei-SartohayAu-Crore-collegeareaintheBalkhash-westernJunggarore-formingbelt,smallgranitictodioriteplutonsandvariousdykes(312–277Ma)andlargegranitebodies(~300Ma)intrudedintotheDevoniantoEarlyCarboniferousvolcano-sedimentarybasin.Thesemagmaticactivities

简介：

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

简介：TheLingtong-Jiaojiaore-centralizeddistrictiscontrolledbythetectonicstressfieldcharacterizedbYthecombinationofextensionandstrike-slip,andthedip,dipangle,pitchandpitchangleoftheorebodiesareallconstrainedbythedynamicconditionsofthetectonics.Themetallotectonicseriesfortheore-centralizeddistrictbelongtothetypeofacombinationofextensionandstrike-slipandcanbesubdividedintofoursub-series.Theore-formingprocessinthebrittleregimecanbedisintegratedintotwostages,i.e.,theembryonicfracturestageandthemegascopicfracturestage,andore-formingprocessisrathercommonintheore-centralizeddistrictattheformerstage.Moreover,severalkeystructuralpatternsandtheirfeatureswerediscussedandapreliminaryassessmentabouttheore-formingprospectinthisdistrictwasmadeinthepaper.

简介：

简介：Liquidseparationofmagmaisreferredtoakindofdiffcrentiationofmagmawhichtakesplaceinthecaseofthatmeltsareimmiscibleorlimitedlymiscibleeacliother.Itplaysanimportantroleintheform-ingofbasic,ultrabasicrocksandoredepositsrclatedtotho8ekindsofrocks.Butitisnotsurewhethcritmayoccurintheprocessoftheformingofin

简介：铁存款(BIF)的变形沉积类型是在世界，和这的簇打的超级大的铁矿石上的铁存款的最重要的类型在巴西包括QuadrilateroFerrifero区域和Carajas，在澳大利亚的Hamersley，在俄国的Kursk，在中国的印度和Anshan-Benxi的中央省。铁存款的Subordinated类型是magmatic，暴烈主人、沉积的。这份报纸简短在世界上介绍主要的超级大的铁矿石簇的地质的特征。在中国的铁矿石的证明储备是相对丰富的，但是他们主要是低档矿石。而且，铁矿石的体谅的部分是困难的为他们的困难的矿石调味品，深埋葬或另外的原因利用。铁矿石存款相对在11个metallogenic省(带)被集中，例如Anshan-Benxi，东方Hebei，Xichang中央的云南省和长江的中间降低的活动范围。主要minerogenetic时代广泛地变化从对太古代第四级，并且主要是对中间晚太古代原生地，Variscan，和Yanshanian时期。主要在中国的铁存款的7种基因类型被变形沉积类型(BIF)，magmatic类型，暴烈主人的类型，skarn类型，热水的类型，沉积类型和捱过的沥滤的类型。充满铁的矿石在skarn和海洋的暴烈主人的铁存款主要发生，局部地在变形沉积类型(BIF)同样热水的改革产品。矿藏和minerogenic模型的minerogenetic系列的理论在调查适用并且铁矿石沉积物勘探。空中地磁学的异例和地磁气的异例的深分析的联合，与严肃，异例是到寻求大、深埋葬的铁沉积物的一个有效方法。中国有铁矿石的一个相对大的寻找矿石的潜力，为特别变形沉积，skarn，和海洋的暴烈主人的铁沉积物。为铁和钢工业的更低的保证度，中国应该给一项做贸易并且打开外国采矿市场。

简介：

简介：Thesourceofore-formingmaterialshaslongbeenacontroversialfocusbothinmetallogenictheoryandinore-searchingpractice.Thisstudydealswiththeheliumandargonisotopiccharacteristicsofpyritesfrom11golddepositsandsomecountryrocksinthegoldmineralizationconcentratedareaswithinthethreemantle-branchstructuresintheregionofNorthHebeiProvince.Itisindicatedthat3He/4Heratiosinthegolddepositsarewithintherangeof0.93×10-6-7.3×10-6,withanaverageof3.55×10-6;R/Ra=0.66-4.93,averaging2.53;40Ar/39Arratiosvarybetween426and2073,withtheaveragevalueof40Arbeing8.32;andtheaverageof4He/40Arratiosis2.17.3He/4Heratiosingneissandgraniteintheperipheryoftheminingdistrictarewithintherangeof0.001×10-6_0.55×10-6,reflectingsignificantdifferencesintheirsources.3Heand4Hefallnearthemantle,asisshownintheHeconcentrationdiagram.Studieshaveshownthattheore-formingmaterialsinthisregionshouldcomefromthedeepinterioroftheEarth.Withthemulti-stageevolutionofmantleplume,ore-formingfluidsinthedeepinteriorweremovingupwardstoshallowlevels(crust).Undersuchcircumstances,therewouldbeinevitablyoccurcrust/mantlefluidmixing,sotheirnoblegasisotopiccharacteristicsareintermediatebetweenthemantleandthecrust.

简介：Yinshananticlineistheproductoftectono-dynamicdeformation-metamorphism.Alongtheaxisoftheanticlineexistsabrittle-ductileshearingzonewhichobviouslycontrolstheore-formation.Mineralizationoccursalongtheaxisoftheanticlineinawidthofabout1000m.Intheminingarea,volca-no-subvolcanicrocksofEarlyYanshanperiodaredividedintothreecycles:Iintermediateacidicdacitelavaanddaciteporphyry;Ⅱacidicamphibolelipariteandquartzporphyry;Ⅲintermediateandesiteporphyrite.AmongthemactivitiesofⅠandⅡcyclesaremoreintensiveandareintimatelyrelatedtothemineralization.Yinshanoredepositistheresultofcombinativeprocessesoftectono-dynamicandvolcano—magmatichydrothermalfluids,sothattherearetwocentersofmetallogeniczoning,onebeingtheaxialstrainzoneofYinshananticlinewhichisthecenteroffirstorder,andtheotherbeingporphyrystock,2ndorder.

简介：Thesupce-largesealetin-polymctallicoredepositsintheTongkeng-ChangpomineisoneofthemostimportantoredepositsintheDacliangtin-polymctallicorefield,locatedinYunnan-GuangxiDiwaSeriesofSoutheasternChinadiwaregion,oceurinasedimentaryrockserieswhiehiscomposedofsiliceousrocksandcarbopaterockswithargillaeeousl

简介：TheJinshaRiver-LancangRiver-NujiangRiverareaisoneoftheimportantprospectareasfornoblemetalandnonferousmetaldepositsofChina.Ofagreatvarietyofgolddepositspresentinthisarea,thefollowingtypesseemtobeeconomicallymostvaluableandpromising:tectonicalterationtypeinophioliticmelange;polymetallicquartzveintyperelatedtointermediate-acidintrusions;finelydisseminatedtypeinfracturezones;mixedhydrothermaltypeintectonicfracturesofcarbonaterocks;hydrothermaltyperelatedtosubvolcanicrocks;volcanic-hotspringtype;submarinevolcanoexhalation-sedimentary-hydrothermalreformationtype.MetallogenicepochsareexclusivelyMesozoicandCenozoic,andoredepositsandorebodiesarecontrolledbylinearstructures.Magmaticactivityhasaffectedgoldmineralizationinvaryingdegrees,andgolddepositsarebasicallyofmesothermal-epithermaltypewithubiquitousandintensealterations.Ore-formingmaterialsandhydrothermalsolutionsshowmulti-sourcecharacter.

简介：ObjectiveTheMiao’ershan–Yuechenglingcompositegranite,locatedinnorthernGuangxiatthewesternsectionoftheNanlingRange,isamulti-periodandmulti-stagecompositeplutonwithanexposedareaofmorethan3000km2(Fig.1).PaleozoicandProterozoicstrataareexposedaroundit,andmagmaticactivitiesmainlyoccurredduring

简介：Thispaperpresentsamethodofestablishingahydrothermalore-formingreactionsystem.Onthebasisofthestudyoffourtypicalhydrothermaldeposits,thefollowingconclusionsconcerninggeochemicaldynamiccontrollingduringhydrothermalmineralizationhavebeensionsconcerninggeochemicaldynaamiccontrollingduringhydrothermalmineralizationhavebeendrawn:(1)Theregionaltectonicactivitiescontroltheconcentrationanddispersionofelementsintheore-formingprocessintermsoftheireffectsonthethermodynamicnatureandconditionsoftheore-formingreactionsystem.(2)Duringhydrothermalmineralizationtheactivitesofore-bearingfaultscanbedividebintotwostages:thebrittlesplittingstageandthebrittle-toughtensingstage,whichwouldcreatecharacteristicallydifferentgeodynamicconditionsforthegeochemicalthermodynamicore-formingsystem.(3)Thehydrothermalore-formingreaactionsystemisanopendynamicsystem.Atthebrittlesplittingstagethesystemwassostronglysupersaturatedandunequilibratedastospeedupandenhancethecrystallizationanddifferentiationofore-formingfluids.Andatthebrittle-toughtensingstage,theore-formingsystemwasinaweaksupersaturatedstate;withdecreasingtemperatureandpressurethecrystallizationoforeformingmaterialwouldshowdown,anditcanberegardedasanequilibratedstate.(4)Inthelatesstagesofhydrothermalevolution,goldwouldbeconcentratedintheresidualore-formingsolution.Thepulsatingfractureactiviteinthisstageledtothecrushofpyriteoreanditwasthenfilledwithgold-enrichedsolution,forminghigh-grage“fissure”goldore.Thisore-formingprocesscouldbecalledthecouplingmechanismoforeformation.