1. Department of Geosciences, Friedrich-Schiller-Universität Jena, Germany
2. Now at: Department of Geology (B20) Université de Liège, Belgium
3. Now at: Timescales of Mineral Systems Group, Institute for Geoscience Research (TIGeR), Curtin University, Perth, Australia e-mail: sebastian.reimann@uni-jena.de; christoph.heubeck@uni-jena.de; p.fugmann@uliege.be; dj.j.van.rensburg@uni-jena.de; andreas.zametzer@postgrad.curtin.edu.au
4. Geological Survey of Denmark and Greenland (GEUS), Copenhagen, Denmark e-mail: shs@ign.ku.dk; tbt@geus.dk