Junkee Rhie¹, Jeong-Ung Woo¹, Seongryong Kim² and Tae-Seob Kang³, (1)Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea, (2)Chungnam National University, Department of Geological Sciences, Daejeon, South Korea, (3)Pukyong National University, Division of Earth Environmental System Science, Busan, Korea, Republic of (South)