1. Key Laboratory of Orogenic Belts and Crustal Evolution; Ministry of Education; School of Earth and Space Sciences; Peking University; Beijing 100871 China
2. Laboratoire Géosciences Rennes; CNRS-UMR6118; Université de Rennes 1; Rennes 35042 France
3. Institute of Earth and Environmental Science; University of Potsdam; Potsdam 14476 Germany
4. Institute of Remote Sensing and Geographic Information System; Peking University; Beijing 100871 China