2013 Fiscal Year Final Research Report
Late Cenozoic sea level changes, their timing and amplitude in offshore New Zealand: Results from IODP Expedition 317
| Project/Area Number |
23340154
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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 | 一般 |
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| Research Field |
Geology
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Shiro 熊本大学, 自然科学研究科, 教授 (90142918)
KAWAGATA Shungo 横浜国立大学, 教育人間科学部, 准教授 (90244219)
SUTO Itsuki 名古屋大学, 環境科学研究科, 准教授 (80432227)
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| Co-Investigator(Renkei-kenkyūsha) |
YAMADA Katsura 信州大学, 理学部, 准教授 (80402098)
ISHIKAWA Ishikawa 信州大学, 理学部, 准教授 (40242713)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 海水準変動 / 更新世 / 酸素同位体比 / 海洋酸素同位体ステージ / シーケンス層序学 |
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| Research Abstract |
IODP Expedition 317 dilled a shelf-slope system in the Canterbury Basin on the eastern margin of the South Island of New Zealand. Seven major core discontinuities correspond to Pleistocene sequence boundaries interpreted on the seismic profiles. An Oxygen isotopic curve and a depth-age curve were generated based on isotopic analysis of benthic foraminifera coupled with biostratigraphy. Sea level amplitudes between glacial and interglacial stages were reconstructed by the analysis of fossil ostracode assemblage taking into consideration subsidence and sedimentation rates. The sequence boundaries that follow the mid-Pleistocene transition correspond to the highest-amplitude oxygen isotope positive excursions that occur during this period (MIS 22, 16, 12, 8 and 6) and the corresponding sequence durations are ~0.2 m.y.. We estimate that eustatic amplitudes were ~50 m from 1.8 to 1.26 Ma and exceed 100 m from 0.9 Ma to present.
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Research Products
(26 results)
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[Journal Article] Data report : Pleistocene benthic foraminiferal oxygen and stable carbon isotope and their application for age models, Hole U1352B, offshore New Zealand, In Fulthorpe, C.S., Hoyanagi, K., Blum, P. & the Expedition 317 Scientists, Proceedings of the Integrated Ocean Drilling Program 3172014
Author(s)
Hoyanagi, K., Kawagata, S., Koto, S., Kamihashi, T. and Ikehara, M.
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Journal Title
Tokyo (Integrated Ocean Drilling Program Management International, Inc.)
DOI
Peer Reviewed
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[Journal Article] Paleoenvironmental changes during the late Pliocene and early Pleistocene : An analysis of fossil ostracode assemblages from the shelf core U1353, U1354 and U1351 (IODP Exp. 317) in Canterbury Basin, off New Zealand2013
Author(s)
Nakamura, M., Kusunoki, S., Yamada, K. and Hoyanagi, K.
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Journal Title
Naturalista Siciliano
Volume: S. IV, XXXVII, 1
Pages: 245-246
Peer Reviewed
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[Journal Article] Data report : Paleoceanography and taxonomic notes based on Pliocene and Pleistocene diatom floras from the Canterbury Basin (IODP Expedition 317), off New Zealand. In Fulthorpe, C.S., Hoyanagi, K., Blum, P. & the Expedition 317 Scientists, Proceedings of the Integrated Ocean Drilling Program 3172013
Author(s)
Suto, I., Kawamura, K. & Chiyonobu, S.
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Journal Title
Tokyo (Integrated Ocean Drilling Program Management International, Inc.)
DOI
Peer Reviewed
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[Presentation] Relationship among climate, glacio-eustasy and sequence boundary formation : core analyses from the Canterbury Basin, South Island, New Zealand2013
Author(s)
Hoyanagi, K., Kobayashi, Y., Kawagata, S., Blum, P. and Fulthorpe, C.
Organizer
American Geophysical Union Fall Meeting
Place of Presentation
San Francisco, USA
Year and Date
2013-12-13
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[Presentation] Relationship between Milankovitch-scale sea-level change and formation of sequence boundaries in the cores from the IODP site U1352 offshore Canterbury in New Zealand2012
Author(s)
Hoyanag, K., Murakoshi , N., Koto, S., Kobayashi, Y., Kamihasi T. and Kawagata, S.
Organizer
34th International Geological Congress
Place of Presentation
Brisbane, Australia
Year and Date
2012-08-06
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