| 滇中播卡铜矿床硫、铅同位素组成及其地质意义 |
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| 引用本文： | 费利东,肖晓牛,肖娥,刘军,白涛.滇中播卡铜矿床硫、铅同位素组成及其地质意义[J].现代地质,2020,34(3):579-587. |
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| 作者姓名： | 费利东 肖晓牛 肖娥 刘军 白涛 |
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| 作者单位： | 1.江苏省有色金属华东地质勘查局,江苏 南京 2100072.南京大学 地球科学与工程学院 内生金属矿床成矿机制研究国家重点实验室,江苏 南京 2100933.福建金东矿业股份有限公司,福建 三明 365101 |
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| 基金项目： | 国家自然科学基金项目(41402077);福建省自然科学基金项目(2018J01143) |
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| 摘 要： | 滇中播卡铜矿床是著名“东川式”铜矿床的典型代表,但对其成矿物质来源和矿床成因认识存在争议。对矿区典型铜矿发育的金属硫化物进行硫和铅同位素组成分析,探讨其成矿物质来源。硫同位素测试结果表明,人占石铜矿金属硫化物的δ34S值为1.6‰~10.7‰,指示硫以岩浆(火山喷发)作用为主要来源,并受到沉积作用影响。铅同位素测试结果则表明人占石铜矿、天生塘铜矿、竹箐凹子铜矿和白石岩铜矿中的铅主要来源于壳幔混合物质。综合前人研究和本次硫、铅同位素分析结果,认为播卡铜矿床成矿物质主要来自地幔,且受到地壳物质的混染。
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| 关 键 词： | 播卡铜矿床 滇中 硫同位素 铅同位素 成矿物质来源 |
| 收稿时间： | 2018-03-22 |
| 修稿时间： | 2019-12-10 |
Sulfur and Lead Isotopic Compositions of Boka Copper Deposit,Central Yunnan,China, and Its Geological Significance |
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| FEI Lidong,XIAO Xiaoniu,XIAO E,LIU Jun,BAI Tao.Sulfur and Lead Isotopic Compositions of Boka Copper Deposit,Central Yunnan,China, and Its Geological Significance[J].Geoscience——Journal of Graduate School,China University of Geosciences,2020,34(3):579-587. |
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| Authors: | FEI Lidong XIAO Xiaoniu XIAO E LIU Jun BAI Tao |
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| Institution: | 1. East China Mineral Exploration and Development Bureau for Non-ferrous, Nanjing, Jiangsu 210007, China2. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China3. Fujian Jindong Mining Company Limited, Sanming, Fujian 365101, China |
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| Abstract: | Boka copper deposit in central Yunnan Province is a representative of the Dongchuan copper depo-sits, but previous studies have different views on its ore-forming material source and the metallogenic origin. In this study, we analyzed the sulfur and lead isotope compositions in typical metal sulfides to reveal the ore-forming material source of this deposit. Metal sulfides from the Renzhanshi copper mine (δ34S=1.6‰ to 10.7‰) indicate that the sulfur was mainly igneous-sourced (volcanic eruptions) with sedimentary input. Lead isotope compositions of metal sulfides from the Renzhanshi, Tianshengtang, Zhuqing’aozi and Baishiyan copper mines indicate that the lead may have had a mantle-crust mixed source. The sulfur and lead isotopic characteristics of metal sulfides from this and previous studies suggest that the ore-forming materials were mainly mantle-sourced with crustal contamination. |
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| Keywords: | Boka copper deposit central Yunnan sulfur isotope lead isotope ore-forming material source |
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