利用XRD, FTIR和XPS现代分析测试技术对东升庙硫多金属矿床氧化微粒的物质组成、 相结构和表面元素状态进行了表征以及转化机理研究。 结果表明, 样品主要由石膏、 方解石、 石英、 白云母、 针铁矿、 有机质等组成, 深部氧化带原生矿石主要发生了氧化、 水解、 脱水和碳酸化作用, 且氧化过程、 氧化条件不及地表氧化带复杂, 未发现新的矿物, 少见西北干旱和极端干旱气候条件下地表氧化带极其发育的硫酸盐类矿物。 研究结果不仅可以用于该类型矿床氧化微粒矿物鉴定方面, 而且对于这部分矿体的找矿勘探、 采矿、 选矿等方面具有重要意义。

In the present paper, characteristics of material compositions, phase structures, surface element states, and transformation mechanism of oxidized particles from Dongshengmiao pyrite-polymetallic sulfide deposit were studied using modern analytical testing technology including XRD, FTIR and XPS. The results show that the samples consist of gypsum, calcite, quartz, muscovite, goethite, organic matter, etc. Primary ore in deep oxidation zone mainly under went such processes as oxidization, hydrolysis, dehydration and carbonation. Compared to the surface oxidation zone of arid and extremely arid regions in the northwestern China, the oxidation process and oxidizing condition of the deep oxidation zone were less complex. New mineral type was also not found, and extensively developed sulfate minerals were rare to be seen. The research results can not only be applied to mineral identification of oxidized particles from this type of ore deposit but also play an important role in ore exploration, mining, mineral processing, etc.