13:45 〜 15:15 [HRE11-P08] Nitrogen isotope geochemistry of ion adsorption-type REE mineralization: Insights from the weathered granitoid rocks in the Sancheong district, south Korea *Jaeguk Jo1、寿朗 山中2、Dongbok Shin1 (1.公州大学、2.東京海洋大学)