gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.1.16 Hydrogeochemical Investigation of the Passive Margin of the Southeast Basin of France: GPF Programme Aquilina L. Boulegue J. BRGM, BP 6009, 45060 Orléans cedex 02 Lab. Géochimie et Métallogénie, UPMC, 4 place Jussieu, 75230 Paris cedex 05 Sureau J. F. BRGM, BP 6009, 45060 Orléans cedex 02 8 1994 58A 1 25 26 Copyright © 1994, The Mineralogical Society 1994