1. Centre for Earth Evolution and Dynamics; University of Oslo; Oslo Norway
2. Helmholtz Center Potsdam, GFZ German Research Center for Geosciences; Section 2.5 Geodynamic Modelling, Telegrafenberg Potsdam Germany
3. Center for Geodynamics, Geological Survey of Norway; Trondheim Norway
4. School of Geosciences; University of Witwatersrand; South Africa