MINING PRACTICE, MINERALOGY | |
Название | Material composition of MMZ and PCMZ sulfide ores of nkomati deposit (South African Republic) |
Автор | Lyalinov D. V., Lebedeva A. A., Vakhrusheva A. P. |
Информация об авторе | Gipronickel Institute Ltd D. V. Lyalinov, Senior Researcher, e-mail: OVLal@nikel.spb.su |
Реферат | Uitkomst complex (South Africa) is the host rock of Ni—Cu sulphide and chromite mineralisation. Commercial sulphide ores are located in lower pyroxenites (the main mineralized zone, or MMZ ore body) and in chromite peridotites (peridotite chromite mineralized zone, or PCMZ ore body). Material composition of two mineralogical and metallurgical samples has been studied, using optical and scanning electron microscopy methods. Being the principal sulphide minerals, pyrrhotite, pentlandite and chalcopyrite form several texture varieties, namely: blebby, net-textured and disseminated ores. High nickel pentlandite mainly occurring as porphyry grains is the most valuable nickel-bearing mineral. Pyrrhotite and violarite also contain nickel. Pentlandite predominantly forms perphoritic isolations. Apart from less rich sulphide mineralization, PCMZ ore body contains chromite ore. The studied ore types are readily treated by flotation. However, fine intergrowths of sulphide and silicate minerals may cause deterioration of flotation performance. |
Ключевые слова | Nkomati, copper-nickel ores, chromite ores, pyrrhotite, pentlandite, minerals composition, silicate minerals, chalcopyrite |
Библиографический список | 1. Gauert C. D. K. Sulphide and oxide mineralisation in the Uitkomst Complex, South Africa : origin in a magma conduit. J. African Earth Sciences. 2001. Vol. 32, issue. 2. pp. 149–161. |
Language of full-text | русский |
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