Dear Isogeochemists, I have a student who is looking for d13C of DIC for brines. He is working on alkaline brines in southern Africa. Does anyone know if there are any references or unpublished numbers out there? He may also be interested in d13C of DIC in alkaline lakes or of other types of brines. Any information would be greatly appreciated. Atekwana, Eliot A Assistant Professor of Geology Department of Geology and Geophysics 1870 Miner Circle University of Missouri-Rolla Rolla, MO 65409-0950 USA email: [log in to unmask] tel: (573) 341-4016 fax: (573) 341-6935 http://campus.umr.edu/geo-geop/