| 西藏加多捕勒铁铜矿床硫、铅同位素组成及成矿物质来源 |
| Received:November 17, 2017 Revised:March 25, 2018 点此下载全文 |
| 引用本文：NIU XuNing,ZHENG YouYe,XU Jing,WU Song.2019.Sulfur and lead isotope composition and tracing of ore-forming material sources in Jiaduobule Fe-Cu deposit of Tibet[J].Mineral Deposits,38(1):144~157 |
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| Author Name | Affiliation | | NIU XuNing | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China | | ZHENG YouYe | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China | | XU Jing | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China | | WU Song | State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, Hubei, China
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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| 基金项目:西藏冈底斯成矿带西段关键科学技术难题研究与应用示范（编号：201511015）项目资助 |
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| 中文摘要:加多捕勒铁铜矿床位于念青唐古拉成矿带西段。综合研究围岩、岩体与矿石的硫、铅同位素组成，发现其矿石硫化物的δ34S值变化范围为-2.1‰~6.2‰，δ34SΣS值为2.16‰，总体具有岩浆硫的特征。矿石硫化物的δ34S值与石英闪长岩、板岩中硫化物的δ34S值相近，表明矿石的硫源可能部分由板岩与石英闪长岩提供。矿石铅同位素组成比较均一，206Pb/204Pb、207Pb/204Pb和208Pb/204Pb的变化范围分别为18.27~18.842、15.653~15.899和38.793~39.703，与冈底斯成矿带北亚带矿床矿石硫化物的铅同位素组成相近，具有上地壳铅源的特征。矿石铅同位素组成与黑云母二长花岗岩、大理岩的铅同位素组成一致，显示铅可能主要来源于黑云母二长花岗岩和大理岩。综合分析表明，加多捕勒铁铜矿床硫、铅同位素的研究显示其成矿物质可能主要来源于黑云母二长花岗岩，部分来源于中二叠统下拉组岩石，少量由石英闪长岩提供，它们为深入研究该矿床的成矿模式提供了资料。 |
| 中文关键词:地球化学 铁铜矿床 硫同位素 铅同位素 加多捕勒 |
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| Sulfur and lead isotope composition and tracing of ore-forming material sources in Jiaduobule Fe-Cu deposit of Tibet |
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| Abstract:The Jiaduobule Fe-Cu deposit is located in the western Nyainqentanglha metallogenic belt. Based on S-Pb isotopic geochemical analysis of country rocks, magmatite and ores, the authors reveal that the δ34S values of the ores range from -2.1‰ to 6.2‰ with the estimated δ34SΣS being 2.16‰, showing typical characteristics of magmatic sulfur. The similar δ34S values of sulfide of ores to pyrite in quartz diorite and slate indicates that sulfur of the ores was possibly partly derived from quartz diorite and slate. The 206Pb/204Pb、207Pb/204Pb and 208Pb/204Pb ratios of the ores range from 18.27 to 18.842, 15.653 to 15.899 and 38.793 to 39.703, respectively, similar to features of the ore sulfides from the deposits in the north subzone of Gangdise metallogenic belt. On the whole, the lead was almost derived from the upper crust. The lead isotopic compositions of ores are similar to those of biotite monzonite and the marble. It is indicated that lead was possibly mainly derived from biotite monzonite and marble. In a word, the study of sulfur and lead isotopes indicates that the major source was possibly derived from biotite monzonite, with the addition of minor mate- |
| keywords:geochemistry Fe-Cu deposit sulfur isotope lead isotope Jiaduobule |
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