| “Fe-Au-Sb-S”体系中金迁移规律的实验研究 |
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| 引用本文：.1997.Experimental research on the migration regularity of Au in the “Fe-Au-Sb-S" system[J].Mineral Deposits,16(1):79~85 |
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| 基金项目:国家自然科学基金( 4880158 )项目 |
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| 中文摘要:在黔滇桂微细浸染型金矿地质研究及前人实验研究基础上设计了75℃含碳的“Fe-Au-Sb-S”热液开放流动体系实验，测定带出溶液之pH及Au、Fe、Sb含量，研究Au、Fe、Sb的迁移条件及相互关系。探讨本区主成矿期之后叠加热液活动中金与锑的行为及金异常与锑异常既密切共生，在空间上又有所偏离的原因。 |
| 中文关键词:含金活性炭 75℃开放流动实验 Au、Sb、Fe的迁移 叠加|热液活动 |
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| Experimental research on the migration regularity of Au in the “Fe-Au-Sb-S" system |
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| Abstract:According to researches on reaction between carbon and organic matter in the ore-forming process of micro-fine disseminated gold deposits in Guizhou-Yunnan-Guangxi area, Sb, As and Au initially concentrated and jointly migrated in the form of gas ( liquid ) phase at the early ore-forming stage; at the principal ore-forming stage, however, Au mainly entered crystal lattice of sulfides in the form of "invisible gold" together with As and trace Sb with part of Au adsorbed by carbon formed as a result of decomposition of organic matter; being very active during the superimposed hydrothermal activity after the principal ore-forming stage, Sb could either coincide with auriferous sulfide mineralization or form independent enrichment of stibnite. This paper has designed experimentation on “Fe-Au-Sb-S" hydrothermal open flow system, in which the extraction of Au from auriferous active carbon by solution is studied in relation to the varying composition, flow velocity and, especially, pH and H2S fugacity of the solution, and a simulation is made on the migration conditions and relationships of Au, Sb, Fe in low-temperature solution within carbonaceous rocks in nature. Experiments demonstrate that at 75℃ neutral but slightly alkaline solution is rich in Sb and can extract Au from the original adsorbent carbon material and cause it to migrate together with Sb, and when pH values of the solution change from neutral but slightly alkaline to neutral but slightly acid (pH~6), Au and Sb will precipitate separately. |
| keywords:auriferous active carbon, open flow experiment, migration of Au, Fe and Sb, superimposed hydrothermal activity |
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