1. Department of Geology, University of Johannesburg, Auckland Park, South Africa e-mail: ahofmann@uj.ac.za
2. Beijing SHRIMP Centre, Chinese Academy of Geological Sciences, Beijing, China Institut für Geowissenschaften, Universität Mainz, Mainz, Germany
3. Wits Isotopes Geoscience Laboratory, School of Geosciences, University of the Witwatersrand, South Africa e-mail: linda.iaccheri@wits.ac.za
4. Department of Earth Sciences, University of Hong Kong, China e-mail: jpmw@hku.hk; hongyangeng@gmail.com
5. Beijing SHRIMP Centre, Chinese Academy of Geological Sciences, Beijing, China e-mail: rock@bjshrimp.cn