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    四川牦牛坪稀土矿床萤石Sr、Nd同位素对地幔成矿流体的指示意义

    许成 黄智龙 刘丛强 漆亮 李文博 管涛

    许成, 黄智龙, 刘丛强, 漆亮, 李文博, 管涛, 2003. 四川牦牛坪稀土矿床萤石Sr、Nd同位素对地幔成矿流体的指示意义. 地球科学, 28(1): 41-46.
    引用本文: 许成, 黄智龙, 刘丛强, 漆亮, 李文博, 管涛, 2003. 四川牦牛坪稀土矿床萤石Sr、Nd同位素对地幔成矿流体的指示意义. 地球科学, 28(1): 41-46.
    XU Cheng, HUANG Zhi-long, LIU Cong-qiang, QI Liang, LI Wen-bo, GUAN Tao, 2003. Indicator of Fluorite Sr and Nd Isotope to Mantle-Derived Ore-Forming Fluids in Maoniuping REE Deposit, Sichuan Province, China. Earth Science, 28(1): 41-46.
    Citation: XU Cheng, HUANG Zhi-long, LIU Cong-qiang, QI Liang, LI Wen-bo, GUAN Tao, 2003. Indicator of Fluorite Sr and Nd Isotope to Mantle-Derived Ore-Forming Fluids in Maoniuping REE Deposit, Sichuan Province, China. Earth Science, 28(1): 41-46.

    四川牦牛坪稀土矿床萤石Sr、Nd同位素对地幔成矿流体的指示意义

    基金项目: 

    国家攀登计划预选项目 95-预-39

    详细信息
      作者简介:

      许成(1977-), 男, 现就读于中国科学院地球化学研究所, 博士研究生, 主要从事矿床地球化学专业研究.E-mail: xucheng1999@hotmail.com

    • 中图分类号: P597

    Indicator of Fluorite Sr and Nd Isotope to Mantle-Derived Ore-Forming Fluids in Maoniuping REE Deposit, Sichuan Province, China

    • 摘要: 萤石是四川牦牛坪稀土矿床主要的脉石矿物之一, 其形成贯穿了整个稀土成矿过程, 因此同位素的研究对探讨萤石和稀土成矿流体的来源具有重要的价值.矿区6件萤石样品的Sr、Nd同位素组成没有明显差异.结合围岩(碳酸岩-正长岩, 花岗岩)同位素组成特征研究表明, 不同颜色、来自不同矿石类型、具有不同REE类型的萤石为同源产物, 稀土成矿流体来源于富集地幔, 与区内碳酸岩-正长岩岩浆活动密切相关.

       

    • 图  1  不同围岩类型萤石Sr同位素统计

      V为火山岩型萤石, 引自文献[8]; G为花岗岩型萤石, 引自文献[16~21], C为碳酸岩或碳酸盐岩型萤石, 引自文献[2, 3, 5, 22~24]; MNP为牦牛坪稀土矿区萤石.图中符号代表均值, 部分地区Sr同位素初始值变化不大, 未列出范围; ☆为本文研究区

      Fig.  1.  Sr isotopic statistics of fluorite in different wall rocks type

      图  2  不同地区萤石[w(87Sr)/w(86Sr)] 0-[w(143Nd)/w(144Nd)]0

      图a中, MNP为牦牛坪稀土矿区萤石; ★为矿区花岗岩; AD为产于印度Amba Dongar碱性岩(硅酸岩-碳酸岩)地区萤石[2]; Ar、Ir、Sp引自文献[16~18], 其成矿流体主要来源于花岗岩.图b中方框为矿区萤石, 椭圆为碱性岩(正长岩-碳酸岩); DMM、HIMU、EM1和EM2引自文献[27], [w(87Sr)/w(86Sr)]Bulk Earth=0.704 5、[3(143Nd)/w(144Nd)]CHUR=0.512 363 8引自文献[28]

      Fig.  2.  [w(87Sr)/w(86Sr)]0-[w(143Nd)/w(144Nd)]0 of different regional fluorites

      表  1  牦牛坪稀土矿床萤石Sr、Nd同位素组成

      Table  1.   Sr-Nd isotope of fluorite in Maoniuping REE deposit

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    • 收稿日期:  2002-05-10
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