gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.1.117 The Origin of Metasomatic Fluids in Skarns from La Maladeta (Central Pyrenees, Spain): C, O, H, S and Sr Isotope Compositions Delgado J. J. Departament de Cristal.lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martí i Franqués s/n, 08028 Barcelona, Spain Venemann T. O'Neil J. R. Department of Geological Sciences, University of Michigan; C.C. Little Bid., 48109 Ann Arbor, Michigan, USA 8 1994 58A 1 221 222 Copyright © 1994, The Mineralogical Society 1994