Stephanie Flude, University of Oxford, Oxford, United Kingdom, Oliver Warr, University of Toronto, Department of Earth Sciences, Toronto, ON, Canada, Nivea Magalhães, University of Toronto, Toronto, Canada, Vincent Bordmann, Total, Paris, France, Jean-Marc Fleury, TOTAL, Paris, France, Humberto Luiz Siquera Reis, UFOP-Federal University of Ouro Preto, Ouro Preto, Brazil, Ricardo IF Trindade, Universidade de São Paulo, Geophysics, São Paulo, Brazil, Darren Hillegonds, University of Oxford, Earth Sciences, Oxford, United Kingdom, Barbara Sherwood Lollar, University of Toronto, Earth Sciences, Toronto, ON, Canada and Chris J Ballentine, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom