Hopp, J., M. Trieloff, G. Brey, A.B. Woodland, N.S.C. Simon, and J. Wijbrans. 2008. “40Ar-39Ar Age Constraints for a Metasomatic Imprint of the Kaapvaal Craton Mantle Lithosphere Ca. 1 Ga ago”. International Kimberlite Conference: Extended Abstracts 9 (October). https://doi.org/10.29173/ikc3271.