Bingkun Yu¹, Xianghui Xue², Christopher J Scott¹, Xinan Yue³, Yutian Chi⁴ and Xiankang Dou², (1)University of Reading, Reading, RG6, United Kingdom, (2)USTC University of Science and Technology of China, Hefei, China, (3)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (4)University of Science and Technology of China, Hefei, China