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.