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1、第14卷第5期地学前缘(中国地质大学(北京);北京大学)Vol.14No.52007年9月EarthScienceFrontiers(ChinaUniversityofGeosciences,Beijing;PekingUniversity)Sep.2007右江盆地含油气成矿流体性质及其成藏2成矿作用12231,2顾雪祥,李葆华,徐仕海,付绍洪,董树义11中国地质大学(北京)地球科学与资源学院,北京10008321成都理工大学地球科学学院,四川成都61005931中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳55000212231,2
2、GuXuexiang,LiBaohua,XuShihai,FuShaohong,DongShuyi11SchoolofEarthSciencesandResources,ChinaUniversityofGeosciences,Beijing100083,China21CollegeofEarthSciences,ChengduUniversityofTechnology,Chengdu610059,China31StateKeyLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,C
3、hineseAcademyofSciences,Guiyang550002,ChinaGuXuexiang,LiBaohua,XuShihai,etal1Characteristicsofhydrocarbon2bearingore2formingfluidsintheYoujiangBasin,SouthChina:implicationsforhydrocarbonaccumulationandoremineralization1EarthScienceFrontiers,2007,14(5):1332146Abstract:Hydrocarb
4、on2bearingore2formingfluidsintheYoujiangBasin,SouthChinaareamulti2componentsandmulti2phasesimmisciblesystem.Thereservoir2formingfluidischaracterizedbylowtemperature(typicallybetween902160℃)andlowsalinity(mostlybelow6wt%NaClequivalent)withmaincomponentsofhydro2carbon,CO2,andH2O
5、.Theore2formingfluidsofgolddepositshavingmediumtolowtemperatures(typicallybetween1502250℃)andalowsalinity(0142617wt%NaClequivalent)aremainlycomposedofH2OandCO2withonlysubordinatehydrocarbons.Theclosespatialassociationofthepaleo2hydrocarbonreservoirswithgolddeposits,thecontempo
6、raneousactivityofreservoirfluidsandore2formingfluids,andtheintimaterela2tionshipbetweenthegenesisofreservoirandofthegoldmineralization,suggestthatboththehydrocarbonres2ervoirsandthegolddepositsareproductsoforganicbasinalfluids.DuringtheLateCaledoniantothemiddleIndosinian,theal
7、ternationofthesedimentary2tectonicframeworkbetweenbasinandplatformlaidabasefortheformationofhydrocarbonreservoirsandmineraldeposits.Theactivationoforganicore2bearingbasinalflu2idswasresponsibleforbothmetalandoil2gasaccumulation.Thebasinalfluidflowaccompaniedbyorogenyduringthel
8、ateIndosiniantoearlyYanshanianchangedthedistributionpatternof
