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矿床地质  2003 

内蒙古哈达门沟金矿床单矿物金浸出实验研究及其地质意义

Keywords: 地球化学,含金铁氧化物,铁氧化物型金矿,浸取实验,哈达门沟,内蒙古

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Abstract:

哈达门沟金矿床产于华北克拉通北缘西段,形成于伸展构造背景中,成矿流体富钾高碱且氧化性强,矿石建造中铁氧化物含量高,并且可见铁氧化物被硫化物交代的现象。文章拟揭示金在铁氧化物中的含量和赋存状态,并探讨金矿床成因。对哈达门沟金矿3种类型矿石中的黄铁矿、铁氧化物(磁铁矿和赤铁矿)单矿物进行金、铁浸取实验,结果表明:铁氧化物含金较高;黄铁矿中的金和铁的浸出曲线不同步,金浸出率与铁浸出率呈负相关,表明黄铁矿中的金主要以颗粒金形式存在;铁氧化物中金、铁同步浸出,浸出率为正相关,表明铁氧化物中的金主要以晶格金和(或)胶体吸附金形式存在。哈达门沟金矿床的上述特征均表明其具铁氧化物型金矿床的特点。

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