The origin and evolution of the lithospheric mantle beneath the Makondi fold belt in Botswana; a comprehensive geochemical study of peridotite xenoliths from the Letlhakane diamond mine - Borst, A.M.; Davidheiser, B.; Meulemans, T.J.; Davies, G.R. (International Kimberlite Conference: Extended Abstracts, 2012)