00485nas a2200073   4500008003900000245026000039210006900299856004300368       1997                          d00aKALT, A., HEGNER, E. and SATIR, M. 1997. Nd, Sr, and Pb isotopic evidence for diverse lithospheric mantle sources of East African rift carbonatites. Tectonophysics, 278: 31-45.LE BAS, M.J. 1977. Carbonatite-nephelinite volcanism: an African case history. 0 aKALT A HEGNER E and SATIR M 1997 Nd Sr and Pb isotopic evidence   uhttps://alkcarb.myrocks.info/node/7092