1. Department of Geology, University of Regina, Regina, Saskatchewan S4S 0A2, Canada
2. China University of Geosciences, Beijing 10083, China
3. Orano Canada Inc., Saskatoon, Saskatchewan S7K 3X5, Canada
4. Saskatchewan Geological Survey, Regina, Saskatchewan S4P 2C8, Canada
5. Geological Survey of Canada, Ottawa, Ontario K1A 0E8, Canada