Origin of Fe–Ti Oxide Mineralization in the Middle Paleoproterozoic Elet’ozero Syenite–Gabbro Intrusive Complex (Northern Karelia, Russia)

Magmatic oxide mineralization widely developed in syenite–gabbro intrusive complexes is an important Fe and Ti resource. However, its origin is hotly debatable. Some researchers believe that the oxide ores were formed through precipitation of dense Ti-magnetite in an initial ferrogabbroic magma (Bai et al., 2012), whereas others consider them as a product of immiscible splitting of Fe-rich liquid during crystallization of Fe–Ti basaltic magma...