*Euclesia Paulina Francisco Cossa1, Ryohei Takahashi1, Andrea Agangi1, Pearlyn Manalo1, Hinako Sato1, Akira Imai2 (1.Akita Univ. , 2.Kyushu Univ.)
convener:Tsubasa Otake(Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University), Ryohei Takahashi(Graduate School of International Resource Sciences, Akita University), Tatsuo Nozaki(Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology), Kenzo Sanematsu(Mineral Resource Research Group, Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)