1. Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, TX, USA
2. Department of Earth Sciences, ETH Zürich, Zürich, Switzerland
3. Department of Geological Sciences and Engineering, University of Nevada, Reno, CA, USA
4. Department of Earth Sciences, University of Hong Kong, Hong Kong, China
5. Department of Earth Sciences, University of Cambridge, Cambridge, UK
6. Department of Earth and Planetary Sciences, University of California, Davis, CA, USA
7. Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA