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地质学报  2004 

凤县八卦庙特大型金矿热水沉积岩的地质地球化学特征

, PP. 829-835

Keywords: 八卦庙金矿,热水沉积岩,地质地球化学,矿床成因,秦岭

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Abstract:

八卦庙特大型金矿的成因引人注目,作者提出含矿地层中存在的一套条带状岩石属于热水沉积成因。此套岩石顺层产出,主要由富石英纹层、富钠长石-石英纹层和富铁碳酸盐纹层互层,构成纹层条带构造,具有沉积韵律和沉积旋回;地层走向上,条带状岩石渐变过渡为千枚岩或板岩,显示局部凹陷的热水沉积盆地特点;条带岩的化学成分、微量元素特征与秦岭泥盆系铅锌矿床中的硅质-钠质-铁碳酸质热水沉积岩非常相似,具有热水沉积特点。热水沉积岩与金矿化空间关系密切,说明八卦庙金矿属于热水沉积(改造)型金矿床。矿床成因类型的正确认识有利于指导区域找矿工作。

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