Ti FERRIALLANITE-(Ce), Ti AND Ti-V ALLANITE-(Ce), ALLANITE-(Ce), ALLANITE-(Y), REE EPIDOTE IN BIOTITE-BEARING QUARTZ GABBROIDS AND PLAGIOGRANITOIDS OF THE ISLAND-ARC PERVOMAYSKO-AIUDAGSKY COMPLEX OF THE CRIMEAN MOUNTAINS
Journal: Геохимия / Geochemistry International
Year: 2025

The unique association of rare-earth minerals of the epidote group, as well as the evolution of lantanides and actinides, titanium and vanadium in their composition are described. Allanite-(Ce), often with a ferriallanite-(Ce) core, an outer zone of allanite-(Y) and a rim of REE epidote, forms pseudomorphs after chevkinite-(Ce) and perrierite-(Ce), as well as isolated crystals. They form intergrowths with biotite, developing near it in quartz gabbronorite-dolerites and gabbronorite-diorites of t