[1] Inst. fur Mineral. und Geochemie, Universität Zu Köln, Zülpicher Strasse 49b, 50674 Köln, Germany
[2] HKL Technology, Blåkildevej 17k, 9500 Hobro, Denmark
[3] Departamento de Geología, Universidad de Chile, Santiago, Chile
[4] Tectonics Special Research Centre, School of Applied Geology, Curtin University of Technology, Perth, WA 6102, Australia
[5] Department of Geology, James Cook University, Townsville, QLD, Australia
[6] Department of Geology, Utrecht University, Utrecht, Netherlands
[7] Laboratory for Isotope Geology, Swedish Museum of Natural History, Stockholm, Sweden