Dynamics of kimberlite magma ascent, intrusion and eruption - Sparks, R.S.J.; Buisman, I.; Brooker, R.; Brown, R.J.; Field, M.; Gernon, T.; Kavanagh, J.; Olgivie-Harris, R.; Schumacher, J.C. (International Kimberlite Conference: Extended Abstracts, 2012)