1. Department of Earth Science and EngineeringImperial College London London UK
2. Institute of Applied Geoscience, School of Earth and EnvironmentUniversity of Leeds Leeds UK
3. Consiglio Nazionale delle RicercheIstituto di Geoscienze e Georisorse Florence Italy
4. Ocean and Earth ScienceUniversity of Southampton Southampton UK
5. Dipartimento di Scienze della TerraUniversità degli Studi di Firenze Florence Italy
6. Department of GeologyChulalongkorn University Bangkok Thailand
7. Allana Potash Corporation Addis Ababa Ethiopia