gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.1.233 Diamondiferous Eclogites from Udachnaya: A Subducted Component in the Siberian Upper Mantle Jacob D. E. Jagoutz E. Max-Planck Institut für Chemie, Abteilung Kosmochemie, Saarstr. 23, D-55122 Mainz Lowry D. Mattey D. Dept. Geology, Royal Holloway, University of London, Egham Hill, Egham, Surrey TW20 0EX, UK Rosenhauer M. Mineralogisch-Petrologisches Institut der Universität Göttingen, Goldschmidtstr. 1, D-37077 Göttingen Kudrjavtseva G. P. Moscow State University, Dept. Mineralogy, 119899 Moscow, Russia 8 1994 58A 1 448 449 Copyright © 1994, The Mineralogical Society 1994