[B-CG07] 地球史解読：冥王代から現代まで

[BCG07-05] レアアース泥に関する最新研究成果の概観

*加藤 泰浩^1,2、中村 謙太郎¹、藤永 公一郎^2,1、安川 和孝^1,2、高谷 雄太郎^3,1,2、大田 隼一郎^2,1、田中 えりか¹、見邨 和英¹、飯島 耕一^4,1、町田 嗣樹^2,1、野崎 達生^4,1,2,5、木村 純一⁴、岩森 光^1,4,6 (1.東京大学、2.千葉工業大学次世代海洋資源研究センター、3.早稲田大学、4.海洋研究開発機構、5.神戸大学、6.東京工業大学)

キーワード：海底鉱物資源、レアアース、レアアース泥、南鳥島、太平洋、深海堆積物

Deep-sea mud enriched in rare-earth elements and yttrium (REY), termed as REY-rich mud, has been expected as a novel mineral resource for the industrially critical elements [1]. Targeting the Japanese exclusive economic zone around Minamitorishima Island, where highly promising REY-rich mud (total REY content > 5,000 ppm) lies at very shallow depth (2 to 4 m) below the seafloor [2], we have conducted a variety of researches on the mud from both scientific and engineering perspectives.

In the presentation, we report a general overview of the research progress on REY-rich mud, and discuss the importance of the mud from viewpoints of the Japan’s resource security and a new strategy for economic growth.

[1] Kato, Y. et al. (2011) Nature Geoscience 4, 535-539, [2] Iijima, K. et al. (2016) Geochemical Journal 50, 557-573.