Tianxin Zhang¹, Hui Zhang², Krishan K Khurana³, Changbo Zhu⁴, Suiyan Fu⁵, Weixing Wan⁶ and Libo Liu⁶, (1)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (2)IGG Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, (3)University of California at Los Angeles, Los Angeles, CA, United States, (4)CAS Chinese Academy of Sciences, Beijng, China, (5)Peking Univ, Beijing, China, (6)University of the Chinese Academy of Sciences, Beijing, China