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    湖南芙蓉锡矿田流体包裹体的He同位素组成及成矿流体来源示踪

    李兆丽 胡瑞忠 彭建堂 毕献武 李晓敏

    李兆丽, 胡瑞忠, 彭建堂, 毕献武, 李晓敏, 2006. 湖南芙蓉锡矿田流体包裹体的He同位素组成及成矿流体来源示踪. 地球科学, 31(1): 129-135.
    引用本文: 李兆丽, 胡瑞忠, 彭建堂, 毕献武, 李晓敏, 2006. 湖南芙蓉锡矿田流体包裹体的He同位素组成及成矿流体来源示踪. 地球科学, 31(1): 129-135.
    LI Zhao-li, HU Rui-zhong, PENG Jian-tang, BI Xian-wu, LI Xiao-min, 2006. Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China. Earth Science, 31(1): 129-135.
    Citation: LI Zhao-li, HU Rui-zhong, PENG Jian-tang, BI Xian-wu, LI Xiao-min, 2006. Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China. Earth Science, 31(1): 129-135.

    湖南芙蓉锡矿田流体包裹体的He同位素组成及成矿流体来源示踪

    基金项目: 

    中科院重要方向项目 KZCX3-SW-125

    中科院重要方向项目 KZCX2-101

    详细信息
      作者简介:

      李兆丽(1976-), 女, 博士生, 从事稀有气体同位素地球化学、矿床地球化学研究.E-mail: lizhaoli3@tom.com

    • 中图分类号: P618.44;P594

    Helium Isotope Composition of Fluid Inclusions and the Origin of Ore-Forming Fluids of Furong Tin Orefield in Hunan Province, China

    • 摘要: 芙蓉锡矿田位于湖南省骑田岭花岗岩体的南部, 是一个新近发现的超大型锡矿田.与以往所研究的与S型花岗岩有关的锡矿床明显不同, 这个矿田在时空上都与骑田岭A型花岗岩密切相关.该矿田矿石硫化物流体包裹体的3He/4He测定值为0.14-2.95 Ra, 低于地幔的3He/4He值(6-7 Ra), 且高于地壳的3He/4He值(0.01-0.05 Ra).这表明芙蓉锡矿田成矿流体中的He具壳幔两端元混合的特点.该区一致的硫、锶及其他证据也都表明, 深部地幔物质确实参与了该区锡的成矿.骑田岭岩体属造山期后张性环境下形成的A型花岗岩类.芙蓉锡矿田就产在骑田岭岩体的内外接触带或岩体中, 其主成矿期与骑田岭岩体的形成时间相当吻合, 且两者均具壳幔两端元混合成因的特征, 所以其形成地球动力学背景可能均与中生代华南岩石圈的拉张、伸展作用密切相关.

       

    • 图  1  芙蓉锡矿田地质略图(据湘南地勘院资料, 2000)

      K.白垩系; P.二叠系; C.石炭系; γπ.花岗斑岩; γ.花岗岩; Sk.矽卡岩; GS.云英岩; 1.地质界线; 2.不整合地质界线; 3.实测或推测断层4.航片解译断层; 5.矿体及编号

      Fig.  1.  Sketch geological map of the Furong tin orefield

      图  2  芙蓉锡矿田矿石流体包裹体

      FR-19-35.与毒砂共生的萤石中的流体包裹体; FR-19-44.与黄铁矿共生的萤石中的流体包裹体; GTL-55-2-1.与黄铁矿共生的石英中的流体包裹体; TXW-3-14.与黄铁矿共生的石英中的流体包裹体

      Fig.  2.  Fluid inclusions in minerals from the Furong tin orefield

      图  3  芙蓉锡矿田He同位素组成演化(Mamyrin and Tols-tikhin, 1984)

      Fig.  3.  Helium isotopic composition and evolution in the Furong tin orefield

      表  1  芙蓉锡矿田硫化物流体包裹体中的He同位素组成

      Table  1.   He isotopic composition of fluid inclusions in sulfides from the Furong tin orefield

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    • 收稿日期:  2005-07-22
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