Metasomatic replacement of diopside by enstatite: a mechanism to convert a lherzolite protolith to orthopyroxene-rich harzburgite - Koornneef, J.M.; Davies, G.R.; Vukmanovic, Z.; Nikogosian, I.; Fulmer, E.C. (International Kimberlite Conference: Extended Abstracts, 2008)