1. L. D. Brown, M. Hauck, D. Alsdorf, A. Ross, M. Clark, Institute for the Study of the Continents, Cornell University, Ithaca, NY 14853, USA.
2. Wenjin Zhao and Xianwen Liu, Chinese Academy of Geological Sciences, Beijing 100037, China.
3. K. D. Nelson and M. Cogan, Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, USA.
4. Jinkai Che, Bejing Computing Center, Ministry of Geology and Mineral Resources, Beijing, 100083, China.