00485nas a2200073   4500008003900000245026000039210006900299856004300368       1987                          d00aBELL, K. and BLENKINSOP, J. 1987. Nd and Sr isotopic compositions of East African carbonatites: implications for mantle heterogeneity. Geology, 15: 99-102. FICK, L.J. and VAN DER HYDE, C. 1959. Additional data on the geology of the Mbeya carbonatite. Econ0 aBELL K and BLENKINSOP J 1987 Nd and Sr isotopic compositions of   uhttps://alkcarb.myrocks.info/node/7615