Morel, M.L.A., G.R. Davies, D.G. Pearson, K.S. Viljoen, and N. Wittig. “Os Isotope and PGE Evidence for Modification of Cratonic Lithosphere: A Study of Peridotites from the Premier Mine, Kaapvaal Craton, SA”. International Kimberlite Conference: Extended Abstracts 90 (October 15, 2008). Accessed September 24, 2020. http://ikcabstracts.com/index.php/ikc/article/view/3294.