gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.2.113 Evidence for Interaction of Proterozoic (2 Ga) Sub-Continental Mantle with an Enriched Mantle Plume from Re-Os Isotope Systematics in French Massif Central Peridotite Xenoliths Lambert D. D. Costa S. Frick L. R. Victorian Institute of Earth and Planetary Sciences, Department of Earth Sciences, Monash University, Melbourne, Victoria 3168, Australia Alard O. Bodinier J. L. “Géofluides-Bassin-Eau” (U.M.R. 5569 CNRS.), ISTEEM, Université de Montpellier II, Place E. Bataillon, Case courrier 057, 34095 Montpellier Cedex 5, France 1998 62A 2 848 849 Copyright © 1998, The Mineralogical Society 1998