Age, Composition and Thermal Characteristics of South African Off-Craton Mantle Lithosphere: Evidence for a Multi-Stage History. - Janney, P. E.; Shirey, S. B.; Carlson, R. W.; Pearson, D. G.; Bell, D. R.; Le Roex, A. P.; Ishikawa, A.; Nixon, P. H.; Boyd, F. R. (Journal of Petrology, 2010)