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Information × Registration Number 0211U001021, 0109U007347 , R & D reports Title Geochemical and geochronological correlation of the Precambrian anorthosite - rapakivi granite complexes in Ukraine and Poland: origin of related Fe-Ti-apatite mineralization popup.stage_title Head Shumlyanskyy Leonid Vladyslavovych, Доктор геологічних наук Registration Date 12-01-2011 Organization M.P. Semenenko Institute of Geochemistry, mineralogy and Ore Formation popup.description2 All studied complexes (Mazury, Korosten and Korsun-Novomyrgorod) belong to anorthosite - granite rapakivi association, intruded into relatively recently (200-300 m.y.) formed Paleoproterozoic continental crust. All three complexes share the same rock suite. Characteristic feature of these is association with ilmenite-titanomgnetite-apatite deposits. All these complexes possesses prolonged development that embraces several tens of m.y. Usually magmatic activity starts with emplacement of large massifs of gabbroic anorthosite; shortly after these gabbroic massifs intrude. Finally, enormous by volume bodies of granitic rocks form. Detailed investigations of anorthosites and gabbroic rocks unequivocally evidences about their affinity and complementarity. Both of them occur due to fractional crystallization of initial melts of jotunitic composition. Anorthosites are predominantly plagioclase cumulates while gabbroic rocks appear as complementary cumulates enriched with respect to mafic and oxide minerals and apatite. Ilmenite-apatite deposits occur during crystallization of gabbroic massifs. Ilmenite separation due solely to gravitational separation is relatively inefficient. This process played main role during formation of the Ukrainian ilmenite deposits that typically low-grade. Formation of high-grade ores required utilization of other mechanisms of ore enrichment, i.e. filter-pressing. This mechanism was responsible for formation of deposits associated with Mazury complex in Poland. To some extend this mechanism was also active at the Nosachiv deposit that associates with Korsun-Novomyrgorod anorthosite - granite rapakivi complex. Product Description popup.authors Шумлянський Леонід Владиславович popup.nrat_date 2020-04-02 Close