1. Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA
2. Department of Earth Sciences, Dartmouth College, HB6105 Fairchild Hall, Hanover, New Hampshire 03755, USA
3. Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
4. Department of Geosciences, Princeton University, Princeton, New Jersey 08544, USA
5. Centre for Tectonics, Resources and Exploration (TraX), Department of Earth Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia
6. Department of Geology and Geography, West Virginia University, 98 Beechurst Avenue, Morgantown, West Virginia 26506, USA
7. Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, Iowa 52242, USA
8. Yukon Geological Survey, P.O. Box 2703 (K-14), Whitehorse, Yukon, Y1A 2C6, Canada
9. Department of Earth Science, University of California, Santa Barbara, 1006 Webb Hall, Santa Barbara, California 93106, USA