2009 Fiscal Year Final Research Report
Reconstruction of the collapse of ocean environment of high latitude to Arctic regions based on micropaleontological analysis
| Project/Area Number |
19340155
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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 |
Stratigraphy/Paleontology
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| Research Institution | Akita University |
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Principal Investigator |
SATO Tokiyuki Akita University, 工学資源学部, 教授 (60241668)
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| Co-Investigator(Renkei-kenkyūsha) |
ODA Motoyoshi 東北大学, 理学研究科, 教授 (60108454)
KITA Itsuro 九州大学, 比較社会文化研究科, 教授 (10143075)
MARUYAMA Toshiaki 山形大学, 理学部, 教授 (70165950)
KAMIYA Takahiro 金沢大学, 理学部, 教授 (80194976)
AMANO Kazutaka 上越教育大学, 学校教育学部, 教授 (50159456)
NEMOTO Naoki 弘前大学, 理工学部, 准教授 (20208292)
YAMASAKI Makoto 秋田大学, 工学資源学部, 助教 (40344650)
CHIYONOBU Shun 東北大学, 理学部, COE助教 (40526430)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 層序 / 古生物学 / 古海洋 / 地質 / 微化石 / 石灰質ナンノ化石 / 有孔虫 / 同位体 |
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| Research Abstract |
We have studied the Cenozoic paleoceanography related to the sea surfa cestratification, nutrient, and temperature based on nannofossils, planktic foraminifera, and Nutrient isotope analysis. The positive correlation between the coccolith maximum size and Discoaster abundance was recognized in the sequence from Eocene to Pliocene. On the basis of the relationship, the oceanographic condirions of late Eocene, early Miocene, and middle middle Miocene are interpreted as the stratified surface water which indicate the oligotrophic condition.
These indicate that the analysis of nannofossis and planktic foraminifera assemblages are useful tool for reconstruction of the stratification or collapse of the sea surface.
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[Journal Article] Drastic change in the late Pliocene subarctic Pacific diatom community associated with the onset of the Northern Hemisphere Glaciation2009
Author(s)
Shimada, C., Sato, T., Yamasaki, M., Hasegawa, S., Tanaka, Y.
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology Vol.279
Pages: 207-215
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[Journal Article] Timing of shell size increase and decrease of the planktic foraminifer Neogloboquadrina pachyderma (sinistral) during the Pleistocene, IODP Exp. 303 Site U1304, the North Atlantic Ocean2008
Author(s)
Yamasaki, M., Matsui, M., Shimada, C., Chiyonobu, S., Sato, T.
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Journal Title
The Open Paleontology Journal Vol.1
Pages: 18-23
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[Journal Article] Paleoecological significance of laminated diatomaceous oozes during the middle-to-late Pleistocene, North Atlantic Ocean (IODP Site U1304)2008
Author(s)
Shimada, C., Sato, T., Toyoshima, S., Ymasaki, M., Tanimura, Y.
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Journal Title
Marine Micropaleontology Vol.69
Pages: 139-150
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[Remarks] ホームページ等
