Kimberlites of the Nakyn field, Siberia, and the Snap Lake/King Lake dyke system, Slave craton, Canada: a new variety of kimberlite with a proposed ultradeep origin - Pokhilenko, N.P.; Agashev, A.M.; McDonald, J.A.; Sobolev, N.V.; Mityukhin, S.I.; Takazawa, E.; Vavilov, M.A.; Yanygin, Y.T. (International Kimberlite Conference: Extended Abstracts, 2003)