2013 Fiscal Year Final Research Report
Precise reconstruction of variation in paleovegetation during Cretaceous hot period by analyses of terrestrial plant-derived organic molecules in sediments
| Project/Area Number |
23540542
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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 |
Stratigraphy/Paleontology
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| Research Institution | Hokkaido University |
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Principal Investigator |
SAWADA Ken 北海道大学, 理学(系)研究科(研究院), 准教授 (20333594)
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| Co-Investigator(Kenkyū-buntansha) |
TAKASHIMA Reishi 東北大学, 学術資源研究公開センター, 准教授 (00374207)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 古植生解析 / 陸域環境変動 / 植物バイオマーカー / ケロジェン / 抵抗性高分子 / 白亜紀 / 植物化石 / 熱化学分解分析 |
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| Research Abstract |
The objective of this study is to reconstruct long time scale variations in paleovegetation and terrestrial paleoenvironment by analyses of terrestrial plant-derived biomarkers and kerogens in sedimentary rocks from the Cretaceous Yezo Group, Hokkaido, Japan. In particular, we found rapid changes in angiosperm / gymnosperm vegetation ratio and coniferous vegetation evaluated by analysis of terrestrial plant terpenoid biomarkers. Moreover, we suggest that composition of long chain n-alkanols released from resistant macromolecule in kerogen can be useful as an indicator of deciduous broad leaf plant vegetation. Variation in the paleovegetation using the long chain n-alkanols released from kerogen is almost synchronous to that in angiosperm / gymnosperm vegetation using terrestrial plant biomarkers, confirming high applicability of the released n-alkanol proxy for reconstructing paleovegetation from ancient sediment.
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Research Products
(47 results)
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[Journal Article] Paleoceanographic history of the Northwest Pacific Ocean over the past 740 kyr, discerned from radiolarian fauna2014
Author(s)
Matsuzaki, K. M., Nishi, H., Suzuki, N., Cortese, G., Eynaud, F., Takashima, R., Kawate, Y. and Sakai, T
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Journal Title
Palaeoclimatology, Palaeoecology
Volume: 396
Pages: 26-40
DOI
Peer Reviewed
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[Journal Article] Cycladophora davisiana abundances as a paleoceanographic and stratigraphic tool in high latitude siliciceous sediments2014
Author(s)
Matsuzaki, K. M., Nishi, H., Suzuki, N., Kawate, Y., Takashima, R. and Sakai, T
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Journal Title
Marine Micropaleontology
Volume: 106
Pages: 1-9
DOI
Peer Reviewed
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[Journal Article] New U-Pb (ID-TIMS and LA-ICPMS) and ^<40>Ar/^<39>Ar geochronological constraints of the Cretaceous geologic time scale calibration from Hokkaido (Japan)2011
Author(s)
Quidelleur, X., Paquette, J.L., Fiet, N., Takashima, R., Tiepolo, M., Desmares, D., Nishi, H. and Grosheny, D
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Journal Title
Chemical Geology
Volume: 286, 3/4
Pages: 72-83
DOI
Peer Reviewed
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