1. Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada.
2. Ontario Geological Survey, 435 James Street South, Thunder Bay, ON P7E 6S7, Canada.
3. Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada.
4. Jack Satterly Geochronology Laboratory, University of Toronto, 22 Russell Street, Toronto, ON M5S 3B1, Canada.
5. Ontario Geological Survey, 933 Ramsey Lake Road, Sudbury, ON P3E 6B5, Canada.