Mantle components of carbonatites from the Kola Alkaline Province, Russia and Finland: A Nd - Sr study
European Journal of Mineralogy Volume 5 Number 5 (1993), p. 985 - 990
published: Jan 1, 1992
manuscript accepted: Jun 21, 1993
manuscript received: May 3, 1993
ArtNo. ESP147050505010, Price: 29.00 €
Abstract Nd and Sr isotope compositions of Kola carbonatites provide evidence for a magma formation through mixing of two mantle components. In the Sr - Nd correlation diagram in e-notation the Kola Carbonatite Mixing Line (KCL) has a slope of-0.372 ± 0.082 and passes through the composition of bulk earth. The KCL is distinctly different from the East African carbonatite line (EACL). Whereas the enriched component might be similar to one proposed for the East African carbonatites, the depleted component by contrast corresponds to the source of the Canadian carbonatites of the Grenville and the Superior province which plots off the loNd array.