钨锡矿化花岗岩地球化学分异规律

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Abstract

钨锡矿化花岗岩演化中呈现显著的地球化学分异，分异方向与程度直接影响矿质的聚集与释放，岩浆上升冷凝过程中持续分离亲石元素与亲流体元素，使富挥发分熔体具备运移金属的能力，多阶段分异让示踪元素分布趋向高演化端元，形成利于钨锡富集的弱还原环境。随温压条件改变，金属与挥发分由深部向浅部运移，在构造薄弱带形成局部富集，花岗质岩浆体系内微量元素分布、挥发分富集及残余组分演变，共同控制钨锡矿化的时序与规模，这一分异规律揭示矿化花岗岩内部物质传输路径，可为判断岩浆成矿潜力提供依据。

Keywords

钨锡矿化

花岗岩

地球化学分异

挥发分富集

岩浆演化

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