简介：Geodomestructuresinthispaperrefertopositiveunitsofdiffcrentorders,geodomespptem,geodomesericsandgeodome,inadiwaregion.Onthem,besidesintrusivebodies,thediwastructuralstag6iscomplcte1ymissingoron1yhasasmallareaandthickncss,butthop1atform,gcosynclina1andcvcnprcgcosyncllna1structuralstagcsarccxposcdwidc

简介：Aftercxperiencingaseriesofgeoteetonicdevelopmentstagesofpregeosyncline,geosynclineandplatformctc’,thisarcaturncdintoadiwarcgioninMcsozoicandCenozoicera-ItmaybedividedintotwogcodomesyStemsofJiangnan,GanyUeandthrcegeodepressionsyStcmsofXianggui,QianguiMinchcandfourcorrespondinguraniummcta1logenicbelts

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：ThegolddepositsofTriassicperiodinthenorthwesternGuangxiarealllocatedinthemarine,fine-grained,fragmentalrockseriescontainingorganicmatter,i.e.thedistributiondistrictsofblackrockseries.Thefine-grainedgolddepositsoccurinorganicmatter-bearingC,D,E,orD,EdivisionsoftheclassicalBoumasequences.Theevolutiondegreeoforganicmattersthroughoilwindowstagereachedtheover-maturedegree.Boththebio-sourcesoftheorganicmattersandthedistributionofgoldintheorganicmattersdisclosethecloseassociationbetweengold,livingbeingsandorganicmatters.Thethermalevolutionoforganicmattersledtothegoldtobeactivized,migratedandenriched,andfinallyformedgolddepositsinthefaultbeltandcrushedzoneofblackrockseries.

简介：TherearethreetypesofgolddepositsintheJiaodonggoldmetallogeneticdomain.Thestrata-boundgolddepositsareanewtype,whichoccurinahydrocarbon-dleddouble-sourcebedenrichedingold(Au174ng/g)andorganiccarbon(0.007-4.225%),Atdiageneticadhydrotherrmalstageswaterandoilweresimultaneouslyactivatedandthestrataboundgolddepositswereformedfrominteractionsbetweenwater,oilandrocks.InthelateYanshanianperiod,goldoreboideswereenrichedandenlargedinresponsetotectonmoagmatismandactionofcomplexore-forminghydrothermalsolutions.Asaresults,itishighlyexpectedtofindsuparlargegolddepositsandtheYanziareaisexpectedtobeaperspectivetargetarea.

简介：TheorematerialoftwometallogencticseriesofhydrothermaldepositsrelatedtomagmaticrocksinsouthHunanwaspolymictic,whichdcrivcdmainlyfrommagmasandpartlyfromsourccbeds’Thed6positsinXianghualingtin-polymetallicorcficldwcreregardedtobelongtomagmaticmetal-lOgeneticscricsofremeltingcontincntalcrust.TheXianghua

简介：Thedepthwastraditionallyestimatedbythepressurevaluederivedfrominclusionormineralmea-surement,andtbepres8urc,ingeneralthinking,causeddirectlybygravityofoverlyingrock.Thepressuremeasuremcntsofthcvertica1andhorizontalsy8temsatXishan,Linglong,sbowthatthevcrtica1pressuregradientisuptollMPal/loom,buttbeto

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

简介：1.IntroductionInrecentyears,theproblemaboutthetectonic-meta1logcncsjshasbeennotieedbymanygeolo-gists’Aboutmoretbantcnyearsago,ProfessorCbcnGuodaproposcdtbcconeeptionoftectonic-met-allogenesis’AndProfessotHuangRuihua(1989,1990)paidgrcatattcntiontotheinitiativeofstructurcsactingonthemctallogencticproe

简介：TheNandan-Hechimetallogeneticbeltisthemostimportanttin-polymetallicproducingdistrictinChina,andisthelocationoftheDachangsuper-largetindeposit.Basedonthedetailedfieldinvestigationandisotopicdata,thestagesofmagmaticactivityintheNandan-Hechimetallogeneticbelthavebeenlinedoutinthispaper.Throughthestudyaboutthegeochemicalcharacteristicsofdifferentgranites,andbyusingω(Al2O3)-ω(SiO2),ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2),AFM,ACFandRb-Yb+Ta,Rb-Y+Nb,Ta-Yb,Nb-Ydiscriminationdiagramsincombinationwithregionalgeologicalsettinganalysis,theauthorscarriedoutanalysesaboutthestructuralenvironmentfortheformationofthegranites,anddiscussedthestructuralenvironmentanddynamicsettingforthelargescalemineralizationinthisarea.OurstudyindicatesthatthemajorityofthegranitesinNandan-HechimetallogeneticbeltbelongtothePOGtype,whilethelaterstagealaskitebelongstotheRRG+CEUGtype.Thegraniteswereformedatthestageofstructuraltransformationfrompostorogenicphasetointraplatesetting.Butthemajorstructuralenvironmentischaracterizedbysteadyregionalextension.Theformationageforthegranitescoincideswiththetimeforthistransformation,andthistranslationenvironmentisfavoredforlarge-scalemetallogenesis.

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