9:15 AM - 9:30 AM
*Takeshi Imayama1, Chang-Wang Oh1, Shauket K. Baltybaev2, Chan-soo Park3, Keewook Yi3, Haemyeong Jung4 (1.Department of Earth and Environmental Science, Chonbuk National University, 2.Institute of Precambrian geology and geochronology, Russian Academy of Sciences, 3.Korea Basic Science Institute, Jeonju Center, Republic of Korea, 4.School of Earth and Environmental Sciences, Seoul National University)