*Syed Azharuddin¹, Kanako Omine², Kosuke Masaka², Ryuji Asami³, Mahjoor Ahmad Lone⁴, Yu-Chen Chou⁴, Chuan-Chou Shen⁴, Ryu Uemura¹ (1.Graduate School of Environmental Studies, Nagoya University, Japan, 2.Faculty of Science, University of the Ryukyus, Japan, 3.Graduate School of Science, Tohoku University, Japan, 4.High-precision mass spectrometry and environment change laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taiwan ROC)

*Yuta Arimura¹, Ryu Uemura¹, Osamu Abe¹, Ryuji Asami², Shufang Yuan³, Hahjung Chin³, Xianfeng Wang³ (1.Nagoya University, 2.Tohoku University, 3.Nanyang Technological University)

*Ryu Uemura¹, Yuta Arimura¹, Osamu Abe¹, Ryuji Asami² (1.Nagoya University, 2.Tohoku University)

*Hiroto Oda¹, Hideko Takayanagi¹, Ryuji Asami¹, Katsuhiro Sano², Yasufumi Iryu¹ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Center for Northeast Asian Studies, Tohoku University)