| Project/Area Number |
25400488
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Ehime University |
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Principal Investigator |
Rie S. HORI 愛媛大学, 理工学研究科, 教授 (30263924)
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| Co-Investigator(Kenkyū-buntansha) |
KODAMA Kazuto 高知大学, 教育研究部, 教授 (00153560)
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| Research Collaborator |
IKEDA Masayuki 静岡大学, 理学研究科, 助教
ABRAJEVITCH Alexandra ロシア科学アカデミー テクトニクス, 地球物理研究所, Research Scientist
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 海洋酸性化 / T-J境界 / 中和 / 大量絶滅 / 放散虫 / 三畳紀末 / 三畳紀－ジュラ紀境界 / コノドント / end Triassic extinction / Acidic ocean |
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| Outline of Final Research Achievements |
Multidisciplinary research has been performed on the pelagic sequences of Triassic-Jurassic boundary from the Inuyama, Mino Belt and Akehama, Chichibu Belt, Japan, from the Waipapa Belt, N.Z. and Antalya, Turkey, in order to clarify the meditation process from oceanic acidification event. The results of this study suggest that oceanic neutralization, indicating by extraordinary compositions of sediments such as Ca rich, occurred after acidification, and then faunal turnover of microfossils such as radiolarians continuously happened in a short duration <100kyr. This phenomenon strongly linked to the end Triassic mass extinctions suggested by a negative peak of stable Carbon isotopic ratios and also decreasing of biogenic magnetite in sediments.
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