BOBROWSKY, Peter, Natural Resources Canada, Geological Survey of Canada, 9860 West Saanich Road, P.O. Box 6000, Sidney, BC V8L4B2, Canada, HUNTLEY, David H., Geological Survey of Canada, 625 Robson Street, Vancouver, BC V6B5J3, Canada, LINTERN, David Gwyn, Natural Resources Canada, Geological Survey of Canada, 9860 West Saanich Rd, Sidney, BC V8L4B2, Canada, SAWAI, Yuki, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Higashi 1-1-1 C7, Tsukuba, 305-8567, Japan, TANIGAWA, Koichiro, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8567, Japan, GOFF, James, School of Biological, Earth and Environmental Sciences, UNSW Australia, Sydney, 2052, Australia and CHAGUE-GOFF, Catherine, School of Biological, Earth and Environmental Sciences, UNSW Australia and ANSTO, UNSW, Sydney, 2052, Australia, peter.bobrowsky@canada.ca