| 黄沙坪铅锌银多金属矿床硫铅同位素地球化学特征 |
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| 关键词:Pb－Zn－Ag ore deposit sulfur and lead isotope Huanshaping |
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| Sulfur and Lead Isotope Geochemical Characteristics of the Huangshaping Lead,Zinc and Silver Polymetallic Deposit |
| The determination and thermodynamic calculation of the temperature and composition of the sulfide-stage mineral inclusions from the Huangshaping ore deposit indicate that the ore-forming temperature of the arsenopyrite-sphalerite ore-forming stage is 300℃，logfCO2 are 0.4～1.4；logfCH4 are －2.05～2.07logfH2O are 1.67～1.93；logfO2 are －32.87～－38.39.The determination of sulfur isotopes of the skam and sulfide stage sulfides shows that δ34S values of pyrite at the skarn stage are 4.1‰～4.6‰；δ34S values of pyrite at the skarn stage are 6.2‰～17.5‰，and thatδ34SSp＞δ34SGn.The determination of δ34SΣs reveals that δ34SΣs is 5‰,and δ34SΣs is 19‰.The determination of lead isotopes of feldspar,galena and sphalerite indicates that 206Pb/204Pb ratios of feldspar are 18.429～19.305，207Pb/204Pb ratios are 15.598～15.905；208Pb/204Pb ratios are 38.647～39.235. 206Pb/204Pbratios of galena and sphalerite are 18.00～18.772，207Pb/204Pb ratios are 15.580～16.045，208Pb/204Pb ratios are 38.490～41.560，assuming linear arrangement.All these data suggest that sulfur and lead in the ore deposit were derived from more than two kinds of material sources. |
| LIU Wuhui,WANG Liming,XU Wenxin,LI Heng,DAI Tagen.2005.Sulfur and Lead Isotope Geochemical Characteristics of the Huangshaping Lead,Zinc and Silver Polymetallic Deposit[J].Acta Geoscientica Sinica,26(z1):160-163. |
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