Feng Shi^2,1、*Yanbin Wang¹、Timothy Officer¹、Tony Yu¹、Lupei Zhu³ (1.Center for Advanced Radiation Sources, The University of Chicago、2.State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan, Hubei, China、3.Department of Earth and Atmospheric Sciences, Saint Louis University)