DISCUSSION OF MECHANISM ABOUT THE DEPOSITION OF GOLD IN PYRITE
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摘要: 在大多数金矿床中,黄铁矿是金的主要载体矿物之一.本文从黄铁矿的晶体结构化学角度出发,分析了黄铁矿的晶体结构特点;探讨了金以An+和An-离子形式分别替代Fe2+离子和S2-离子的形成机理以及以可见金方式在黄铁矿中的赋存机制.通过分析,认为金在黄铁矿中的富集主要与黄铁矿的晶体结构有关,特别是与黄铁矿中的Fe-S、S-S、An-S和Fe-Au键的电子结构特点有关.Abstract: Pyrite is one of the primary gold-bearing minerals in most gold deposits. In view of the chemistry of crystalline structure, the features of pyrite crystal are analyzed. The mechanism of gold ions (Au+ and Au-)taking the position of ironic and sulphuric ions (Fe2+ and S2-) respectively, and the deposition of gold with macro-form are discussed. Through the study, the authors conclude that the deposition of gold in pyrite crystal is primarily related to the crystal structure of pyrite, especially to the electronic structure of Fe-S, S-S. Au-S and Fe-Au bonds in the pyrite crystal.
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Key words:
- pyrite /
- structure-chemistry /
- deposition mechanism /
- bond /
- electronic structure
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