1. Department of Earth Sciences, The University of Western Ontario, London, Ontario N6A 5B7, Canada
2. Department of Geological Sciences, Indiana University, Bloomington, Indiana 47405-1405, United States
3. Mineral Deposit Research Unit, Department of Earth and Ocean Sciences, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
4. Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9 Canada