| 与峨眉地幔柱有关年代学研究的新进展及其意义 |
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| 引用本文：.2007.New advances in geochronologic study related to Emei mantle plume and their significance [J].Mineral Deposits,26(5):550~556 |
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| 基金项目:国土资源部百名优秀青年科技人才计划项目（我国西南部地区铂族元素矿床成矿系列与成矿规律）和地质大调查项目〔铂钯等新类型矿产资源勘查技术方法成矿规律与资源潜力评价（No.200310200002）、我国西部重要成矿区带矿产资源潜力评估（No.200420190004）、中国成矿体系综合研究（No.1212010634002）及我国重要矿产和区域成矿规律研究（No.1212010633903）〕 |
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| 中文摘要:研究表明，云南白马寨铜镍硫化物矿床中矿石的Re-Os等时线年龄〔（249±32）Ma〕、四川杨柳坪外围麦约尔苦橄质基性_超基性岩中金云母的40Ar/39Ar坪年龄〔（25.2±1.9）Ma〕及攀枝花铁矿层中黑云母的40Ar/39Ar坪年龄〔（256.85±2.69）Ma〕都与峨眉山玄武岩的年龄一致，表明它们的形成时代基本相同。在空间上，这些矿床与峨眉山玄武岩及同时期形成的基性_超基性岩密切相关，因此可以认为，它们都是峨眉地幔柱在古生代与中生代之交达到活动高峰期的产物。 |
| 中文关键词:地球化学 峨眉地幔柱 铜镍硫化物矿床 钒钛磁铁矿 铂矿 同位素年代 |
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| New advances in geochronologic study related to Emei mantle plume and their significance |
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| Abstract:This paper reports some new advances in the geochronologic study of ores and rocks related to the Permian Emei mantle plume in Southwest China. The Re_Os isochron age of Cu_Ni massive sulfide ores from Baimazhai, Yunnan, is （249±32）Ma, the 40Ar/39Ar apparent age of phlogopite from the Maiyue'er picritic mafic_ultramafic rocks close to the Yangliuping Cu_Ni massive sulfide deposit in Danba, Sichuan, is （250.2±1.9）Ma, and the 40Ar/39Ar apparent age of biotite from the No 9 ore zone from the famous Panzhihua V_Ti_bearing magnetite deposit in Sichuan is （256.85±2.69）Ma. All of these results agree with the age of the Emeishan basalts, which are distributed widely in Southwest China. Taking into account the same ages shared by Emeishan basalts, the Cu_Ni ores from Baimazhai, the iron ores from Panzhihua and the mafic_rocks from Danba, this paper suggests that the Emeishan basalts, the massive Cu_Ni ores and the V_Ti_bearing Fe deposits distributed widely in Southwest China were formed at the end of Permian and related to the Emei mantle plume genetically. |
| keywords:geochemistry, Emei mantle plume, Cu_Ni massive sulfide deposit, V_Ti_magnetite deposit, PGE, geochronology |
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