1. Department of Geosciences, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, United States of America
2. Department of Geology, University of Georgia, Athens, GA, United States of America
3. X-ray Microanalysis Core Facility, University of Missouri, Columbia, MO, United States of America
4. Department of Geological Sciences, University of Missouri, Columbia, MO, United States of America