gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.58A.2.221 The Origin of Nitrogen in Aquifer Systems in the Great Plain, Hungary Varsány I. Institute of Mineralogy, Geochemistry and Petrology, Attila József University, H6701 Szeged, Pf. 651, Hungary Kovács L. Ó. Hungarian Geological Survey, H1442 Budapest, Pf. 106., Stefánia út 14., Hungary August–September 1994 58A 2 934 935 Copyright © 1994, The Mineralogical Society 1994