Nivea Magalhaes¹, James Farquhar², Grant Michael Bybee³, Sarah Penniston-Dorland², Douglas Rumble⁴, Judith A Kinnaird³ and Matthew McCreesh³, (1)University of Toronto, Dept. of Earth Sciences, Toronto, ON, Canada, (2)University of Maryland College Park, College Park, MD, United States, (3)University of the Witwatersrand, School of Geosciences, Johannesburg, South Africa, (4)Carnegie Inst Washington, Washington, DC, United States