Examination of tsunami deposits and cosesmic deformation in eastern edge of Nankai Trough, Japan
| Project/Area Number |
26287126
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
横山 祐典 東京大学, 大気海洋研究所, 教授 (10359648)
宮入 陽介 東京大学, 大気海洋研究所, 研究員 (30451800)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Keywords | 南海トラフ / 駿河トラフ / 津波堆積物 / 古地震 / 古生物 / 堆積相解析 / 完新統 / 放射性炭素年代測定 / 古津波 / 隆起貝層 / 銭洲海齢 / 海溝型地震 / 完新世 / 層序 / 地質 / 放射性炭素年代 / 活断層 |
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| Outline of Final Research Achievements |
(1) This study reviews the distribution of prehistorical tsunami deposits and tsunami boulders during the past 4000 years, based on previous studies in the coastal area of Shizuoka Prefecture, Japan. The results show that a tsunami deposit dated at 3400-8211;3300 cal BP can be traced between the Shimizu, Shizuoka, and Rokken-gawa lowlands, whereas no geologic evidence related to the corresponding tsunami (the Rokkengawa-Oya tsunami) was found on the southern Izu Peninsula. Thus, the Rokkengawa-Oya tsunami is not classified as a Level 2 tsunami.
(2) To test the hypothesis that the southern margin of the Zenisu Ridge formed part of the rupture source-area of the AD 1498 Meio earthquake, we re-examined Holocene crustal movements at Shimoda, Niijima, Jinaijima, Shikinejima and Kouzushima based on marine species compositions, and determined AMS 14C ages of emerged sessile assemblages. Our results support the hypothesis that the 1498 AD Meio earthquake occurred along the Nankai Trough.
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Report
(4 results)
Research Products
(32 results)
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[Journal Article] Holocene geohazard events on the southern Izu Peninsula, central Japan (first title; Geohazard events during Holocene on the southern Izu Peninsula, central Japan.2015
Author(s)
Kitamura, A., Ohashi, Y., Ishibashi, H., Miyairi, Y., Yokoyama, Y., Ikuta, R., Ito, Y., Ikeda, M., Shimano, T.
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Journal Title
Quaternary International
Volume: 不明
Pages: 725-733
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Holocene geohazard events on the southern Izu Peninsula, central Japan2015
Author(s)
Kitamura, A., Ohashi, Y., Ishibashi, H., Miyairi, Y., Yokoyama, Y., Ikuta, R., Ito, Y., Ikeda, M., Shimano,T., Kawate S.
Organizer
XIX INQUA
Place of Presentation
愛知県 名古屋市 名古屋国際会議場
Year and Date
2015-07-27 – 2015-08-02
Related Report
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[Presentation] Late Holocene uplifts of Shikine Island on the northern Zenisu Ridge off Central Japan: Implication for tsunami source area of AD 1498 Meio and 1605 Keicho tsunamis2015
Author(s)
Imai, T., Kitamura, A., Ito, M., Miyairi, Y., Yokoyama, Y., Sugihara, K., Yamaguchi, T., Ando, M., Yoong, K. H.
Organizer
XIX INQUA
Place of Presentation
愛知県 名古屋市 名古屋国際会議場
Year and Date
2015-07-27 – 2015-08-02
Related Report
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