1. Department of Geology and Mineralogy; Graduate School of Science; Kyoto University; Kitashirakawa-Oiwakecho, Sakyo-ku 606-8502 Kyoto Japan
2. Institute of Geological Sciences; University of Wrocław; Pl. M. Borna 9 50-205 Wrocław Poland
3. Economic Geology Research Institute; School of Geosciences; University of the Witwatersrand; PO Wits Johannesburg 2050 South Africa
4. Institute of Geological Sciences; Polish Academy of Sciences; Kraków Research Centre; ul. Senacka 1 31-002 Kraków Poland
5. Ecole et Observatoire des Sciences de la Terre UMR 7516; Université de Strasbourg; 1, rue Blessig 67084 Strasbourg France
6. Center for Lithospheric Research; Czech Geological Survey; 11821 Praha 1 Czech Republic
7. Institut für Geowissenschaften; Universität Mainz; 55099 Mainz Germany