2007 Fiscal Year Final Research Report Summary
A study for the long-term and short-term disturbances of the envirnment by the extraterrestrial impact at the Cretaceous/Tertiary boundary
| Project/Area Number |
17403005
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MATSUI Takafumi The University of Tokyo, Graduate School of Frontier Sciences, Professor (80114643)
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| Co-Investigator(Kenkyū-buntansha) |
TADA Ryuji The University of Tokyo, Graduate School of Science, Professor (30143366)
TAJIKA Eiichi The University of Tokyo, Graduate School of Science, Associate Professor (70251410)
GOTO Kazuhisa Tohoku University, Graduate School of Engineering, Assistant Professor (10376543)
HASEGAWA Takashi Kanazawa University, College of Science and Engineering, Associate Professor (50272943)
TOYODA Kazuhiro Hokkaido University, Graduate School of Environmental Science, Associate Professor (10207649)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Extraterrestrial impact / Cretaceous / Tertiary / Cuba / Tsunami / Mass extinction |
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| Research Abstract |
We conducted field survey near the impact site at the Cretaceous/Tertiary (K/T) boundary at Fomento area, Cuba and Lajilla area, Mexico in order to investigate the magnitude and duration of the impact-induced tsunami. As a result, we found that the evidence of the crater-ward first tsunami wave is observed at Fomento area as well as the impactite in and out of the Chicxulub crater. These observations support the hypothesis that the tsunami was generated by the ocean water invasion into the crater and overflow from the crater.
We also studied K/T boundary deposits and their adjacent deposits in central Cuba, Mexico, and New Zealand in order to study the long-term disturbance of the environment within one million years after the impact with a resolution of several thousand years. We found that n-C_<31>/(n-C_<29>+n-C_<31>) ratio and δ^<13>C_<wax> remarkably decreased just above the K/T boundary. In addition, the distributions of n-C_<31>/(n-C_<29>+n-C_<31>) ratio and δ^<13>C_<wax> were variable age by age. Especially, these values had positive correlation during early Paleocene, suggesting that carbon cycle disturbance and environmental change by the impact was recorded in terrestrial plants. We further studied the K/T boundary deposit at Lajilla, Mexico and correlated with Cuban deposits until 70 ka after the impact. In New Zealand, we obtained iridium-rich clay layer. Based on our study at Cuba, Mexico, and New Zealand, we could discuss the paleo-environmental change within 100 ka after the K/T boundary impact.
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Research Products
(33 results)
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[Journal Article] Lateral lithological and compositional variations of the Cretaceous/Tertiary deep-sea tsunami deposit in northwestern Cuba2008
Author(s)
Goto, K., Tada, R., Tajika, E., Iturralde-Vinent, M. A., Matsui, T., Yamamoto, S., Nakano, Y., Oji, T., Kiyokawa, S., Garcia, D., Otero, C., Rojas, R.
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Journal Title
Cretaceous Research 29
Pages: 217-236
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] High-sensitive elemental analysis Using Multi-parameter Coincidence Spectrometer, GEMINI-II2007
Author(s)
Hatsukawa, Y., Miyamoto, Y., Toh, Y., Oshima, M., Gharaie, M. H. M., Goto, K., Tovoda, K.
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Journal Title
Journal of Radioanalytical and Nuclear Chemistry 272
Pages: 273-276
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] High-sensitive elemental analysis Using Multi-parameter Coincidence Spectrometer, GEMINI-II2007
Author(s)
Hatsukawa, Y., Miyamoto, Y., Toh, Y., Oshima, M., Gharaie, M. H. M., Goto, K., Toyoda, K.
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Journal Title
Journal of Radioanalytical and Nuclear Chemistry 272
Pages: 273-276
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Environmental recovery on land after the Cretaceous-Tertiary impact2007
Author(s)
Yamamoto, S., Hasegawa, T., Tada, R., Goto, K., Garcia-Delgado, D., Diaz-Otero, C., Rojas-Consuegra, R., Yamamoto, S., Sakuma, H., Matsui, T.
Organizer
International Conference on Paleoceanography VIIII
Place of Presentation
上海(中国)
Year and Date
2007-09-04
Description
「研究成果報告書概要(和文)」より
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[Presentation] Environmental recovery on land after the Cretaceous-Tertiary impact2007
Author(s)
Yamamoto, S., Hasegawa, T., Tada, R., Goto, K., Garcia-Delgado, D., Diaz-Otero, C., Rojas-Consuegra, R., Yamamoto, S., Sakuma, H., Matsui, T.
Organizer
International Conference on Paleoceanography VIIII
Place of Presentation
Shanghai
Year and Date
2007-09-04
Description
「研究成果報告書概要(欧文)」より
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[Presentation] キューバ中部の白亜紀/第三紀(K/T)境界における分子レベル炭素同位体比層序2007
Author(s)
山本真也, 長谷川卓, 多田隆治, 後藤和久, Garcia-Delgado, D., Diaz-Otero, C., Rojas-Consuegra, R., 山本信治, 佐久間広展, 松井孝典
Organizer
日本古生物学会2007年年会
Place of Presentation
大阪
Year and Date
2007-06-30
Description
「研究成果報告書概要(和文)」より
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[Presentation] 白亜紀/古第三紀境界イベントに伴う陸源有機物供給量とその炭素同位体比の変化2007
Author(s)
山本真也, 長谷川卓, 多田隆治, 後藤和久, Garcia-Delgado, D., Diaz-Otero, C., Rojas-Consuegra, R., 山本信治, 佐久間広展, 松井孝典
Organizer
古海洋学シンポジウム
Place of Presentation
東京
Year and Date
2007-01-12
Description
「研究成果報告書概要(和文)」より
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[Presentation] キューバ中部ロマカピロの白亜紀/古第三紀境界上位層の年代と陸源バイオマーカーの変動2006
Author(s)
山本真也, 長谷川卓, 多田隆治, 後藤和久, Garcia-Delgado, D., Diaz-Otero, C., Rojas-Consuegra, R., 山本信治, 佐久間広展, 松井孝典
Organizer
日本地質学会第113年年会
Place of Presentation
高知
Year and Date
2006-09-17
Description
「研究成果報告書概要(和文)」より
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[Book] 惑星地質学2008
Author(s)
後藤和久
Total Pages
53-54
Publisher
東京大学出版会
Description
「研究成果報告書概要(和文)」より
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