| Co-Investigator(Kenkyū-buntansha) |
安川 和孝 東京大学, 大学院工学系研究科(工学部), 講師 (00757742)
臼井 洋一 国立研究開発法人海洋研究開発機構, 海域地震火山部門(火山・地球内部研究センター), 研究員 (20609862)
町田 嗣樹 千葉工業大学, 次世代海洋資源研究センター, 上席研究員 (40444062)
大田 隼一郎 東京大学, 大学院工学系研究科(工学部), 助教 (70793579)
藤永 公一郎 千葉工業大学, 次世代海洋資源研究センター, 上席研究員 (90409673)
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| Budget Amount *help |
¥42,120,000 (Direct Cost: ¥32,400,000、Indirect Cost: ¥9,720,000)
Fiscal Year 2021: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2020: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2019: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2018: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2017: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
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| Outline of Final Research Achievements |
In this study, major and trace element analyses, isotope analysis and high-resolution dating were performed for REY-rich mud, ferromanganese nodules, and cobalt-rich crusts in the Minamitorisshima EEZ, all of which are expected to be a future domestic rare metal resources. As a result, it was clarified that the deposition of highly REY-enriched layer, the start of ferromanganese nodule formation, and the compositional change of the cobalt-rich crust all occurred simultaneously between the late Eocene and early Oligocene and those are attributed to the inflow of strong deep ocean currents to this region.
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