The "exceptionally fresh" Udachanaya-east kimberlite: evidence for brine and evaporite contamination - Kostrovitsky, S.I.; Kopylova, M.G.; Egorov, K.N.; Yakovlev, D.A.; Kalashnikova, T.V.; Sandimirova, G.P. (International Kimberlite Conference: Extended Abstracts, 2012)