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矿床地质  2004 

豫西公峪金矿床地质地球化学特征及成因探讨

Keywords: 地质学,地质特征,成矿流体,硫氢氧同位素,金矿床,公峪,河南

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Abstract:

文章较为详细地总结了公峪蚀变岩型金矿的地质特征,将成矿作用分为3个阶段,即石英-黄铁矿阶段,石英_硫化物阶段和石英-碳酸盐阶段,并测定了矿石样品的稳定同位素组成。结果表明:硫化物的δ34S值变化于-1.7‰~2.2‰之间,与陨石硫的δ34S值接近,反映为深源;成矿Ⅰ阶段流体的δD值为-68‰~-86‰,δ18OH2O为-0.6‰~+4.9‰,成矿Ⅱ阶段流体的δD值为-67‰~-84‰,δ18OH2O为-0.6‰~-8.9‰,反映成矿流体主要有两个来源,Ⅰ阶段以深源水为主,Ⅱ阶段有大量大气降水混入。公峪金矿与祁雨沟金矿应属于同一成矿系统的产物,均与燕山晚期岩浆热液活动有关,可能为同源、同期、不同构造空间的演化产物。

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