| 何文武.广东河台金矿金的迁移形式及沉淀机制的研究[J].地质找矿论丛,1991,(3):40-45 |
| 广东河台金矿金的迁移形式及沉淀机制的研究 |
| THE TRANSPORTING FORMS AND DEPOSITIONAL MECHANISM OF GOLD OF HETAI GOLD DEPOSIT, GUANGDONG |
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| DOI：10.6053/j.issn.1001-1412.1991.3. 004 |
| 中文关键词: 河台金矿 含金络合物 迁移形式 沉淀机制 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 热力学计算表明,金主要以Au(HS)2-络合物形式迁移,Au(HS)2-的活度达2.43×10-6(m)(金-石英阶段)和1.46×10-6(m)(金-石英-硫化物阶段)。硅化作用、硫化物化作用、菱铁矿化作用以及磁黄铁矿与黄铁矿的转变作用,引起流体fo2和pH的降低,含金络合物发生分解,金得以沉淀。此外,含金络合物与围岩中铁的反应也是造成金沉淀的重要原因之一。 |
| 英文摘要: |
| Thermodynamic calculations show that gold was transported mainly as Au(HS)2- complex. The activity of Au(HS)2- is 7.7×10-8(m) for the gold-quartz stage and 1.46×10-6(m) for the gold quartz-sulfide stage. Gold-complex decomposed and gold deposited in. response to the decrease of fo2and pH that was caused by siliconizing, sulfidization, sideritization and the conversion of pyrrhotite into pyrite. Furthermore, it is one of the important reasons for the deposition of gold that gold complexes react with Fe in wallrock. |
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