| ArticleName |
Precious metals mineral forms determinations in Russia’s Far East ferriferrous manganese ores
deposits |
| Abstract |
The purpose of the studies consisted in development of a methodological approach for assessment of multimetal ores’ precious metals mineralization and exposure of rebellious ore-processing factors. Through the example of the Southern Khingan ore zone (the Poperechnoye deposit) ferromanganesian mineralization, a preliminary mineralogical-geochemical and geological estimation of the core material was performed with individualization of the different ore types. Thereupon, small technological samples were formed, precious metals mineral fractions were separated, chemico-analytical quantity determinations of finely dispersed particles were accomplished, mineral intergrowths were subjected to ultrasonic treatment, composition and structure of precious metals mineralizations were described in detail. Mineable platinum and gold grades were established as a result of the studies of the core samples from the drillholes bored in the deposit central area. Three ore types were distinguished: 1) manganese quartz-braunite with hematite and magnetite, 2) carbonatemagnetite iron ores with hematite, 3) pyrite ores with carbon minerals. Each ore type is characterized by a certain combination of ore and gangue minerals. The revealed precious metals mineralization is associated with all three ore types. According to the shortened mineralogical analysis data, a sufficiently high platinum grade is noted in carbonate-magnetite and quartz-braunite ore types, and that of gold — in ferruginous quartzites. The revealed characteristic properties of the Southern Khingan ore cluster Poperechnoye deposit are distinctive for the Kimkanskoye, Sutarskoye and other deposits of this region. The ores in question are similar to the iron ores deposits of the Tuguro-Chumikansk region and also a number of the iron ore formations located in Primorye and Yakutia. Consequently, the proposed methodology may be applied with respect to the above iron ore deposits and formations. |
| References |
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