1. Queen's Facility for Isotope Research, Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6
2. Arthur B. McDonald Canadian Astroparticle Physics Research Institute, Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario, Canada K7L 3N6
3. Ontario Geological Survey, 933 Ramsey Lake Road, Sudbury, Ontario, Canada P3E 6B5
4. Geological Survey of Canada, 601 Booth St., Ottawa, Ontario, Canada K1A 0E9