Jingbo Zhang, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China;State Key Laboratory of Geological Processes and Mineral Resources, School of Scientific Research, China University of Geosciences, Beijing 1000, Xi'an, China, Fang An, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China, Xi'an, China and Rui Wang, State Key Laboratory of Geological Processes and Mineral Resources, School of Scientific Research, China University of Geosciences, Beijing 100083, China, Beijing, China