gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.2.245 Trace Element Concentrations in Amphibole and/or Clinopyroxene from Composite Mantle Xenoliths of the West Eifel (Germany): An Ion-Microprobe Study Witt-Eickschen G. Seck H. A. Mineralogisch-Petrographisches Institut, Universität Köln, Zülpicherstr. 49b, D50674 Köln, Germany Kaminsky W. Institut für Kristallographie, Universität Köln, Zülpicherstr. 49b, D50674 Köln, Germany Harte B. Department of Geology & Geophysics, University of Edinburgh, Grant Institute, West Mains Road, Edinburgh EH9 3JW, UK August–September 1994 58A 2 981 982 Copyright © 1994, The Mineralogical Society 1994