Affiliation: | 1. Dipartimento Scienze della Terra ‘A. Desio’ Via Mangiagalli 34, 20133 Milano, Italy;2. British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK;3. NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK;4. British Geological Survey, Murchison House, West Mains Road, Edinburgh EH9 3LA, UK;5. PO Box 19576, Woolston, Christchurch 8241, New Zealand;6. School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK |