Sedova E. Petrology and ore-bearing of Precambrian Kamennomogilskiy complex raremetal granites of Eastern Priazov Ukrainian Shield

The work is devoted to the research into substantial composition and internal structure of the Kamennomogilsky complex granite massifs in connection with their nonstandard rare-metal and rare-earth-rare-metal mineralization which is attributable to typical for A-type granitoid plutons crystallization differentiation trend: granosyenites (occasionally even quartz syenites) -> amphibole granites -> amphibole-biotite granites ->biotite granites and leukogranites ->biotite-muscovite and muscovite leukogranites with topaz and fluorite (+pegmatites). Granites of the Kamennomogilsky complex possess all typical for A-type plutons geochemical features, such as extra high iron content, preponderance of K compared with Na, increased contents of Zr, Y, Nb and rare earths. Combination of rare-metal mineralization with yttrium-earth-rare one is explained by the nature of differentiation and manifestations of late-magmatic and metasomatic processes. Granites of the Kamennomogilsky complex are the typical product of intra-plate anorogenic magmatism due to the impact of the mantle plume.