1. Institute of Geophysics ETHZ Zürich Switzerland
2. Institute of Theoretical Physics University of Zürich Zürich Switzerland
3. Research School of Earth Sciences ANU Canberra Australia
4. Université de Lyon, Université Claude Bernard Lyon 1, ENS, CNRS, Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement Villeurbanne France
5. Institute of Geochemistry and Petrology ETHZ Zürich Switzerland
6. Department of Earth and Planetary Science University of California Berkeley CA USA