The intraplate alkaline-granite magmatism essentially contributes to formation of rare-metal strategic raw materials. In the Major Sayan Fault East Mountains, rocks Zashikhinsky (Pz 3 ) massif were studied through isotope-geochemical analysis identify probable sources magma and mechanisms their evolution resulting in ore accumulations, up Nb-Ta deposits. Nd isotopic characteristics its alkaline...

The oldest-known rocks of the eroded Dunedin Volcano (DV), New Zealand, active 16.0–11.0 Ma, were emplaced by penecontemporaneous explosive eruptions and intrusions magmas with a remarkable range compositions, including basanite, alkali basalt, trachyte phonolite. compositional diversity in rapid succession during earliest development volcano signify existence complex magmatic system highly evo...