1. Durham University Department of Earth Sciences, Science Site, , Durham DH1 3LE, UK
2. Open University School of Environment, Earth and Ecosystem Sciences, , Walton Hall, Milton Keynes MK7 6AA, UK
3. University of Leeds Institute of Geophysics and Tectonics, School of Earth and Environment, , Woodhouse Lane, Leeds LS2 9JT, UK
4. Consiglio Nazionale delle Ricerche Istituto di Geoscienze e Georisorse, , Via Moruzzi, 1, 56124 Pisa, Italy
5. University of Edinburgh Grant Institute, School of GeoSciences, , West Mains Road, Edinburgh EH9 3JW, UK
6. Institute of Volcanology and Seismology FED RAS , Piip Avenue 9, Petropavlovsk-Kamchatsky 683006, Russia
7. Universität Göttingen GZG, Abt. Geochemie, , 37077 Göttingen, Germany
8. Academica Osypyana ul. Institute of Experimental Mineralogy RAS, , 4, Chernogolovka 142432, Russia
9. Lomonosov Moscow State University Department of Geology, , 1 Leninskie Gory, 119992 Moscow, Russia
10. University of Oxford Department of Earth Sciences, , South Parks Road, Oxford OX1 3AN, UK