1. 1 Department of Earth Sciences, Brock University, St. Catharines, Ontario L2S 3A1, Canada
2. 2 Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada
3. 3 GeoSphere Austria, Hohe Warte 38, A-1190 Wien, Austria
4. 4 Ontario Geological Survey, Sudbury, Ontario P3E 6B5, Canada
5. 5 Manitoba Geology Survey, 360-1395 Ellice Avenue, Winnipeg, Manitoba R3G 3P2, Canada
6. 6 Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada