1. Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A 0E8
2. Queen's Facility for Isotope Research, Department of Geological Sciences and Geological Engineering, Queen's University, 36 Union Street, Kingston, Ontario, Canada K7L 3N6
3. Geological Survey of Canada, 3303 33 Street NW, Calgary, Alberta, Canada T2L 2A7
4. Department of Physics, Engineering Physics & Astronomy, Arthur B. McDonald Canadian Astroparticle Physics Research Institute, Queen's University, Kingston, Ontario, Canada K7L 3N6
5. Yukon Geological Survey, 300 Main Street, Whitehorse, Yukon Territory, Canada Y1A 2B5