1. School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
2. Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri 63108, United States
3. Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi’an 710054, China
4. Xi’an Center of Geological Survey, China Geological Survey, Xi’an 710054, China
5. Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China