Application of Fe K-edge XANES determinations of Fe3+/ΣFe in garnet to peridotite xenoliths from the Udachnaya kimberlite - Yaxley, G.M.; Berry, A.J.; Kamenetsky, V.S.; Woodland, A.B.; Paterson, D.; de Jonge, M.D.; Howard, D.L. (International Kimberlite Conference: Extended Abstracts, 2012)