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矿床地质  2002 

山东金青顶金矿床和七宝山金矿床的流体包裹体REE组成

Keywords: 地球化学,矿床成因,流体包裹体,ICP-MS,稀土元素,金矿床,山东金青顶和七宝山

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Abstract:

文章运用电感耦合等离子体质谱(ICP_MS)方法,研究了金青顶金矿床和七宝山金矿床的脉石英中流体包裹体REE组成特征。结果表明流体包裹体的REE均为LREE富集型,并显示Eu正异常。成矿流体REE配分模式和REE参数特征表明它们具有相同的来源。与金矿有关的成矿母岩,即昆嵛山花岗岩和七宝山次火山岩的REE特征也极为相似,反映成矿流体的REE组成都有从成岩向成矿过程演化继承的关系。矿床流体包裹体REE组成的相似特征及矿床碳氧同位素等特点表明,金青顶金矿床和七宝山金矿床是华北东部中生代同一构造热事件的产物。

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