O, C and Sr Isotopic Composition of Calcites in Garnet Megacrysts and Carbonatizated Granulitic Xenoliths from the Udachnaya Kimberlite Pipe, Yakutia - Solovjeva, L.V.; Dneprovskaya, L.V.; Maslovskaya, M.N.; Brandt, S.B. (International Kimberlite Conference: Extended Abstracts, 1991)