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利用扫描电镜和电子探针等方法,对沃溪钨锑金矿床中产于(块状白钨矿-石英脉中的)黄铁矿微裂隙中的自然金和Au-Sb矿物相进行了较详细的观察和研究。结果表明,黄铁矿中Au-Sb矿物相除了有前人已经鉴定出的方锑金矿(AuSb2.13)外,还新发现有锑金矿(Au1.02Sb)矿物相。二者以显微颗粒的形式存在于黄铁矿显微裂隙中。黄铁矿微裂隙中Au-Sb矿物相的存在,指示矿床成矿在黄铁矿形成之后存在Au-Sb混溶的成矿流体。自然金、方锑金矿、锑金矿等矿物的沉淀析出可能是Au-Sb混溶流体从高温(高于350℃)向低温(250℃)演变的结果。此外,Au-Sb矿物相的发现对改进矿石冶炼中Au、Sb的分离技术有参考价值。
The natural gold and Au-Sb mineral phases in the Wolxian tungsten-antimony-gold deposits in the microfractures of massive (scheelite-quartz vein) pyrites were characterized by scanning electron microscopy and electron probe. Observation and research. The results show that in addition to the antimony gold (AuSb2.13) which has been identified by the predecessor, the Au-Sb mineral in the pyrite has also newly discovered the mineral phase of antimony gold (Au1.02Sb). Both exist in the form of micro-particles in pyrite microcracks. The presence of the Au-Sb mineral phase in the microfractures of the pyrite indicates that there is an Au-Sb miscible ore-forming fluid after the formation of pyrite. The precipitation of natural gold, Fang-antimony gold and antimony-gold minerals may be the result of the evolution of Au-Sb miscible fluids from high temperature (above 350 ℃) to low temperature (250 ℃). In addition, the discovery of the Au-Sb mineral phase has reference value for improving Au, Sb separation technology in ore smelting.