Nd, Pb and Sr Isotopic Compositions of East African Carbonatites: Evidence for Mantle Mixing and Plume Inhomogeneity

New Pb isotopic data are presented for 10 young Mesozoic to Cenozoic (0–116 Ma) carbonatites from a 1400 km long segment of the East African Rift. Patterns observed in Pb vs Pb, Sr vs Pb and Nd vs Pb isotope diagrams define unusual, nearly linear, trends that are interpreted as mixing between two co... View More