Soo-Chun Chae, Korea Institute of Geoscience and Mineral Resources (Korea)
; Young-Nam Jang, Korea Institute of Geoscience and Mineral Resources (Korea)
; In-Kook Bae, Korea Institute of Geoscience and Mineral Resources (Korea)
; Sergey Yudintsev, Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (Russia)
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