Evolution of calcite-bearing Kimberlites by melt-rock reaction – evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada - Bussweiler, Y.; Stone, R.S.; Pearson, D.G.; Luth, B.W.; Stachel, T.; Kjarsgaard, B.A.; Menzies, A. (International Kimberlite Conference: Extended Abstracts, 2017)