Geochemistry and geodynamics of mafic rocks from the vicinity of the Bouvet triple junction, southern Atlantic

The determined geochemical and temperature characteristics of basaltic melt s from the vicinity of the Bouvet triple junction point to the influence of the Bouvet island plume, which develops due to mantle partial melting at d epths of more than 110-100 km, on the relatively stable and much more shall ow-sitting mid-oceanic ridge geodynamic systems (which were formed by the m elting of mantle material at depths greater than 60-70 km). The evolution o f the Bouvet volcanic center results in enriched melts, which are higher, f irst of all, in alkalis, incompatible lithophile trace elements, and REE an d have lower crystallization temperatures than those of the depleted magmas of the NMORB type from the rift zones of mid-oceanic ridges.