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矿床地质  2003 

云南会泽超大型铅锌矿床构造带方解石稀土元素地球化学

Keywords: 地球化学,构造带方解石,稀土元素,会泽铅锌矿床

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Abstract:

云南会泽超大型铅锌矿床明显受北东向构造带控制，构造带中的脉状方解石为富碳酸盐流体活动的产物。文章通过对这种脉状方解石的稀土元素地球化学研究，探讨构造流体的来源及其与成矿流体的关系。结果显示，矿区北东向构造带中脉状方解石的稀土含量范围较宽(∑REE：5.471×10-6～56.788×10-6)、稀土配分模式为相似的轻稀土富集型、存在较强的铕负异常(δEu：0.439～0.742)。结合地层、矿石中脉石矿物方解石、峨眉山玄武岩的稀土元素含量和碳、氧同位素组成，认为控矿构造带中方解石稀土为同源构造流体的结晶产物，构造流体稀土元素地球化学特征明显受成矿流体的控制。

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