1. National High Magnetic Field Laboratory Geochemistry Group and Department of Earth, Ocean, and Atmospheric Science Florida State University Tallahassee FL USA
2. Department of Earth Sciences Utrecht University Utrecht The Netherlands
3. Now at: Department of Earth Sciences Vrije Universiteit Amsterdam Amsterdam The Netherlands
4. Now at: Department of Chemistry, Chemical Analysis & Mass Spectrometry Facility Pontchartrain Institute for Environmental Sciences University of New Orleans New Orleans LA USA
5. German Research Centre for Geosciences GFZ Potsdam Germany
6. Now at: Department of Biological Sciences University of Lethbridge Lethbridge Canada