gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.1.306 Respiration of Bulk Organic Matter in Aquifer Sediments with the Micro-Oxymax™ Hartog N. Department of Geochemistry, Utrecht University, P.O. Box 80021, 3508 TA, Utrecht, Netherlands van der Grift B. Griffioen J. Netherlands Institute of Applied Geoscience TNO, P.O. Box 6012, 2600 JA Delft, Netherlands van Liere H. TNO Institute of Environmental Science, Energy Resources and Process Innovation, Apeldoorn, Laan van Westenenk 501, 7334 DT, Apeldoorn, Netherlands 1998 62A 1 579 580 Copyright © 1998, The Mineralogical Society 1998