gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.1.209 A Leached Layer Hydrolysis Model: A Better Way to Understanding Feldspar Dissolution at Elevated Temperatures and Pressures? Hellmann R. L.G.I.T.-I.R.I.G.M. BP 53X, Grenoble Cedex, France 8 1994 58A 1 400 401 Copyright © 1994, The Mineralogical Society 1994