| 二甲金矿动力成矿机理模拟实验及热力学分析 | |
| 王仲武 | |
| 1992 | |
| Degree Grantor | 中国科学院地球化学研究所 |
| Place of Conferral | 中国科学院地球化学研究所 |
| Degree Name | 博士 |
| Keyword | 二甲 预富集 成矿 净化 熔烛 |
| Abstract | 本文通过对二甲金矿进行有关的样品分析，高温高压浸滤实验及动力模拟实验和热力学计算，探讨了不同温度、压力、成分等条件下金的来源、活化及动力迁移、沉淀富集机制。样品分析及热力资料表明，二甲矿高档商品具预富集成矿两阶段；在成矿阶段，金、硫及热液具多来源，但主要来自岩浆与地层；从早期到晚期，氧、硫相对充足，pH向中性过渡。高温高压实验证明：在成矿中，金的活化主要源于动力下金的释放，温度、压力的升高及特定的热液成分都有助于这一过程的实现。金的释放包括赋金矿物的净化和熔烛；金的迁移则由于动力下金与氯、HS~-等离子的络合和胶体吸附；金的沉淀与成矿主要由于动力的释放和fo_2、fs_2、pH的相对降低。 |
| Other Abstract | Data about samples and outside geology suggest that formation of Erjia gold deopsit includes two stages: pre-enrichment and ore-forming. Both quartz and pyrite are major gold-bearing minerals. On the process of ore-forming, high temperature-high pressure experiments express that activation of gold is relative to release of gold, including resorption and puritication. Deposition and mobilization of gold can be attributed to hydro-thermal property, pressure and temperature. Based on experimental water-rock interaction in close and open system, solubility calculation indicates that, in all these environment, gold forms the aqueous with Au(HS)_2~- and Au_2S(HS)_2~(2-) dominating, the fluid transports in the form of its bisulphide complex. From early to late for the forming of gold deposit, lgfo_2、lgfs_2 decreased gradually, pH changed from alkaline to neutral, multiple sulfide with S_2O_3~(2-) dominating are the major reason of forming of pyrite and distilation of sulfide. |
| Pages | 85 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/3888 |
| Collection | 研究生_研究生_学位论文 |
| Recommended Citation GB/T 7714 | 王仲武. 二甲金矿动力成矿机理模拟实验及热力学分析[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1992. |
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| N88708.pdf（3631KB） | 暂不开放 | -- | Application Full Text | |||
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