广西五圩矿田箭猪坡Pb-Zn-Sb多金属矿床成因研究:来自硫同位素和闪锌矿微量元素的制约
Genesis of the Jianzhupo Pb-Zn-Sb Polymetallic Deposit in the Wuxu Ore Field,Guangxi Province: Constraints from Sulfur Isotopes of Sulfides and Trace Elements Compositions of Sphalerites
查看参考文献64篇
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文摘
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为探讨箭猪坡Pb-Zn-Sb多金属矿床的成因及物质来源,对该矿床主成矿阶段的硫化物进行了硫同位素分析、对闪锌矿进行了微量元素分析。结果表明,硫化物的δ~(34)S_(VCDT)值为3.92‰~ 8.00‰,硫化物沉淀过程中硫同位素已达平衡。利用硫同位素温度计估算的成矿温度为114~ 377 ℃,利用共生矿物对(Δ~(34)S_(Py-Sp)值)估算出成矿流体中总硫的δ~(34) S(Σ_(S-fluids))为5.93‰,暗示硫主要来自岩浆,但不排除有少量地层硫的加入。箭猪坡矿床闪锌矿相对富集微量元素Fe、Cd、Mn、Cu、In等,元素对比值如Zn/Cd、Cd/Fe、Cd/Mn和Ga/In值,lnGa-lnIn关系判别图解以及地质特征均显示岩浆热液型矿床特征,说明其成矿物质来源与岩浆热液有关。 |
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其他语种文摘
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In order to constrain the material sources and ore genesis of the Jianzhupo Pb-Zn-Sb Polymetallic deposit,sulfur isotopes of sulfides and trace elements compositions of sphalerites that were formed at metallogenic stage of the deposit have been analyzed in this paper. The results show that the δ~(34)S_(VCDT) values of sulfides vary from 3.92‰ to 8.00‰,indicating that those sulfides were formed under thermal equilibrium condition. The ore-forming temperatures range from 114 to 377 ℃,calculated by using Sulfur isotope geological thermometer. Based on the δ~(34)S_(VCDT) values of sphalerite and coexisting pyrite (Δ~(34)S_(Py-Sp)values), the calculated total δ~(34)S_(ΣS-fluids)value of the ore-forming fluid is 5.93‰,suggesting that sulfur was predominantly derived from magmatic source,with possible minor contribution of sedimentary source. The sphalerites of the Jianzhupo deposit are relatively enriched in elements such as Fe,Cd,Mn,Cu,In. Furthermore,multiple geochemical indicators (such as Zn/Cd,Cd/Fe,Cd/Mn,and Ga/In ratios), the discrimination diagram of lnGa-lnIn,and geological characteristics of the deposit show features of the magmatic hydrothermal deposit,indicating that the source of oreforming materials of the deposit is related to the magmatic hydrothermal fluid. |
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来源
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矿物岩石地球化学通报
,2020,39(3):646-662 【核心库】
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DOI
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10.19658/j.issn.1007-2802.2020.39.041
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关键词
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闪锌矿
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硫同位素
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微量元素
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岩浆热液
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箭猪坡矿床
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地址
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长安大学地球科学与资源学院, 西安, 710054
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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, 550081
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内蒙古第三地质矿产勘查开发有限责任公司, 呼和浩特, 010010
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华电华中清洁能源有限公司, 武汉, 430000
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武汉恒达四方工程有限公司, 武汉, 430000
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四川省核工业地质调查院, 成都, 610061
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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地质学 |
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基金
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贵州省自然科学基金重点项目
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国家自然科学基金项目
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国家重点研发计划项目
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文献收藏号
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CSCD:6750514
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