| 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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| 引用本文：刘悟辉,汪礼明,徐文忻,李蘅,戴塔根.2005.黄沙坪铅锌银多金属矿床硫铅同位素地球化学特征[J].地球学报,26(z1):160-163. |
| DOI：10.3975/cagsb.2005.s1.52 |
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| 中文摘要:对黄沙坪矿床硫化物期矿物进行矿物包裹体温度和成分测定，并进行热力学计算，获得毒砂－闪锌矿阶段成矿温度为300°，logfCO2为0.4～1.4；logfCH4为－2.05～2.07logfH2O为1.67～1.93；logfO2为－32.87～－38.39。对矽卡岩期和硫化物期硫化物进行硫同位素测定，获得矽卡岩期黄铁矿的δ34S为4.1‰～4.6‰； 硫化物期硫化物的δ34S为6.2‰～17.5‰，并具有δ34SSp大于δ34SGn和两组δ34SΣs值。对长石、方铅矿和闪锌矿进行了铅同位素测定，获得长石的206Pb/204Pb比值为18.429～19.305，207Pb/204Pb比值为15.598～15.905；208Pb/204Pb比值为38.647～39.235。方铅矿和闪锌矿的206Pb/204Pb比值为18.00～18.772，207Pb/204Pb比值为15.580～16.045，208Pb/204Pb比值为38.490～41.560，并呈线性排列，显示矿床硫铅是两种以上的物质来源。 |
| 中文关键词:铅锌银矿床 成矿条件 硫铅同位素 黄沙坪 |
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| Sulfur and Lead Isotope Geochemical Characteristics of the Huangshaping Lead,Zinc and Silver Polymetallic Deposit |
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| Abstract: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. |
| keywords:Pb－Zn－Ag ore deposit sulfur and lead isotope Huanshaping |
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