1. Economic Geology Research Centre, College of Science and Engineering, James Cook University, Townsville, QLD, Australia
2. W.H. Bryan Geology and Mining Centre, Sustainable Minerals Institute, Indooroopilly, QLD, Australia
3. Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
4. Department of Geology, University of Johannesburg, Johannesburg, South Africa
5. Department of Geology and Geological Engineering, Colorado School of Mines, Golden, CO, USA