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1、1000-0569/2010/026(06)-1760-72ActaPetrologicaSinica岩石学报*云南保山核桃坪铅锌矿成矿年龄及动力学背景分析111,21,311,3陶琰胡瑞忠朱飞霖马言胜叶霖程增涛111,21,31,21,3TAOYan,HURuiZhong,ZHUFeiLin,MAYanSheng,YELinandCHENGZengTao11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,贵阳55000221中国科学院研究生院,北京10004931有色金属华东地质勘查局,南
2、京21000711StateKeyLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China21GraduateSchoolofChineseAcademyofSciences,Beijing100049,China31EastChinaMineralExplorationandDevelopmentBureau,Nanjing210007,China
3、2010-03-02收稿,2010-05-04改回1TaoY,HuRZ,ZhuFL,MaYS,YeLandChengZT120101Ore-formingageandthegeodynamicbackgroundoftheHetaopinglead-zincdepositinBaoshan,Yunnan1ActaPetrologicaSinica,26(6):1760-1772AbstractBaoshanblockhostsarangeofFe,Cu,Pb,Zn,Ag,Hg,Sndeposits
4、1TheHetaopingPb-Zn-CudepositisatypicalonehostedinPaleozoiccarbonites1ThemineralizationtypesincludeCu-richskarncopper,skarnmagnetite,hydrothermalPb-Zndeposit166Thedeposithasatleast1@10tofZnandPbmetalaswellaspotential1@10tofCumetalevaluatedbyexploration
5、department1Skarnsandgabbroicdykesarecommoninthisdistrict,butsilicicintrusionsandstocksoccuroutsidethemine110sulfidemineralseparatesincludingsphalerite,chalcopyrite,pyrite,andparagenousrelatedquartzwereseparatedbyhandpicking1Rb-Sranalyzes8786yieldisoch
6、ronageof11611?319MaandaninitialSr/Srof01711851Inaddition,wehaveanalyzedzirconU-PbandHfisotopeforZhibenshanandKejiegraniteinBaoshanblockbyLA-ICPMS1Theanalyzesyieldagesof12617?116Maand93?13Ma,respectively1Itsuggestsatemporalrelationshipofthemineralizati
7、ontothelocalsilicicmagmatisminLate-YanshanianandcontemporaneouswithclosureoftheBangong-LujiangPaleo-ocean1ZhibenshanandKejiegranitesarehigh-Kandperaluminious1HfisotopeanalyzesrevealsthezirconsoftheZhibenshangranitehaveEHf(i)between-3and-8,tDM2(Hf)valu
8、esbetween114and116Ga,whiletheKejiegranitezirconshaveEHf(i)between-017and-4,andtDM2(Hf)valuesbetween112and114Ga1ItsuggeststhatthegranitesarerelatedtothecrustalanatexisoftheProterozoicbasement,insteadofmeltingofjuvenilesubductionmaterialinLate-Y
