Trevor Paul Irons, University of Utah, Energy and Geoscience Institute, Dept. of Civil & Environmental Engineering, Salt Lake City, UT, United States, M. Andy Kass, Aarhus University, Geoscience, Aarhus C, Denmark, Benjamin R. Bloss, USGS, Geology, Geophysics, and Geochemistry Science Center, Denver, CO, United States and Thomas Kremer, University of Nantes, Nantes, France