1. Discipline of Earth Sciences, School of Environmental and Life Sciences, Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia;
2. Division of Resources & Energy, Department of Industry, Regional Mapping & Exploration Geoscience, Geological Survey of New South Wales, Maitland, NSW 2320, Australia;
3. NSW Institute of Frontiers Geoscience, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia;
4. Division of Tropical Environments and Societies, James Cook University, Townsville, Qld 4810, Australia