1. Department of Geological Sciences Stockholm University Stockholm Sweden
2. School of Earth and Environmental Sciences University of St. Andrews UK
3. Department of Earth Sciences Uppsala University Uppsala Sweden
4. Université de Strasbourg CNRS ITES UMR 7063 Strasbourg France
5. Subsecretaría de Minería Provincia de Buenos Aires Argentina
6. Facultad de Ciencias Naturales y Museo Unviersidad Nacional de La Plata Buenos Aires Argentina
7. Natural History Museum University of Oslo Oslo Norway
8. Department of Geosciences Physics of Geological Processes The NJORD Centre University of Oslo Oslo Norway