1. Geological Survey of Canada, Natural Resources Canada, Sidney, British Columbia, Canada.
2. School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada.
3. Geological Survey of Canada, Natural Resources Canada, Ottawa, Ontario, Canada.
4. Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia, Canada.
5. Geological Survey of Canada, Natural Resources Canada, Dartmouth, Nova Scotia, Canada.