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峨眉山大火成岩省去顶作用与黔西铁-多金属矿床成因:锆石U-Pb同位素年代学约束

DOI: 10.1007/s11430-015-5066-x, PP. 1469-1480

Keywords: 峨眉山大火成岩,去顶作用,黔西铁-多金属矿床,表生分带成矿

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Abstract:

?报道了对位于黔西六盘水-威宁地区铁-多金属矿床开展的锆石U-Pb年代学和微区元素地球化学研究,揭示了该新型矿床的成因与峨眉山大火成岩省的去顶作用有关.通过分析和总结峨眉山大火成岩省边缘地区不同类型表生矿床的空间分布特征,本研究提出该矿床成因是特殊的古地理环境(形成富铁红土化剖面)与晚二叠世时期反复的海进和海退作用相耦合的产物.

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