Youjun Zhang, Sichuan University, Chengdu, China, Mingqiang Hou, Institute of Meteoritics, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, United States, Peter Driscoll, Carnegie Institution for Science Washington, Washington, DC, United States, Nilesh Salke, HPSTAR, Beijing, China and Jung-Fu Lin, The University of Texas, Austin, Department of Geological Sciences, Jackson School of Geosciences, Austin, TX, United States