1. 1 British Geological Survey, The Lyell Centre, Research Avenue South, Edinburgh EH14 4BA, United Kingdom
2. 2 Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, Heverlee 3001, Belgium
3. 3 Geodynamics and Mineral Resources Unit, Leuvensteenweg 13, Tervuren 3080, Belgium
4. 4 School of Earth and Environmental Sciences, University of St. Andrews, Bute Building, St. Andrews, Fife KY16 9TS, United Kingdom
5. 5 Camborne School of Mines and the Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, United Kingdom
6. 6 GeoAfrica Prospecting Services CC, P.O. Box 24218, Windhoek, Namibia
7. 7 Terratec Geophysical Services, Schillerstr. 3, Heitersheim 79423, Germany
8. 8 Karlsruhe Institute of Technology (KIT), Adenauerring 20b, Karlsruhe 76131, Germany
9. 9 Eberhard Karls University Tübingen, Wilhelmstrasse 56, Tübingen 72074, Germany
10. 10 College of Science and Engineering, University of Derby, Kedleston Road, Derby DE22 1GB, United Kingdom