[1] School of Geography and Resource Science, Neijiang Normal University, Neijiang,641100, China
[2] Yunnan Institute of Geological Survey, Kunming,650216, China
[3] State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing,100083, China
[4] School of Earth Sciences, Yunnan University, Kunming,650500, China