1. Equipe Géobiosphère; Institut de Physique du Globe-Sorbonne Paris Cité; Université Paris Diderot; CNRS; Paris France
2. Department of Earth and Atmospheric Sciences; University of Alberta; Edmonton Alberta Canada
3. Department of Earth and Space Sciences and Astrobiology Program; University of Washington; Seattle WA USA
4. Center for Applied Geoscience; University of Tübingen; Tübingen Germany