1. Geological Survey of Norway, PO Box 6315 Sluppen, 7491 Trondheim, Norway
2. NERC (Natural Environment Research Council) Isotope Geosciences Laboratory, British Geological Survey, Nottingham, NG12 5GG, UK
3. Department of Geosciences, University of Oslo, PO Box 1047 Blindern, 0316 Oslo, Norway
4. IFREMER (Institut Français de Recherche pour l’Exploitation de la Mer) Unité de Recherche Géosciences Marines, 29280 Plouzané, France
5. Centre for Exploration Targeting–Curtin Node, Department of Applied Geology, Western Australian School of Mines, Curtin University, Perth, WA 6102, Australia
6. Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands veg 1, N-7491 Trondheim, Norway
7. School of Geosciences, University of the Witwatersrand, Private Bag 3, 2050 Wits, Johannesburg, South Africa