2010 Fiscal Year Final Research Report
Did change of deep water source amplify or diminish the climate fluctuation?: oceanic event stratigraphy of sulfur isotopes
| Project/Area Number |
20340144
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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 | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TAJIKA Eiichi 東京大学, 新領域創成科学研究科, 教授 (70251410)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 古環境 / 海洋深層水 / 白亜紀 / 炭素同位体比 |
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| Research Abstract |
Initial purpose of this project is to capture a rapid switch of oceanic deep water sources and to understand how the climate responds to it. After introduction of a mass spectrometer, preparation and analytical techniques for sulfur isotope analysis of carbonate associated sulfate were developed. However, we found that sulfur isotope data do not provide good data for the discussion of our purpose. We abandoned sulfur isotope method and switched our methods to that based on high resolution carbon isotope stratigraphy and theoretical analyses. Then we could estimated time scale of deep water circulation during mid-Cretaceous. A model for evaluating sensitivity of the oceanic environment against CO2 increase in the atmosphere was constructed.
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Research Products
(34 results)
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[Journal Article] High resolution carbon isotope stratigraphy across the Cenomanian/Turonian boundary in the Tappu area2010
Author(s)
Hasegawa, T., Seo, S., Moriya, K., Tominaga, Y., Nemoto, T., Naruse, T.
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Journal Title
The Science Report of Kanazawa University
Volume: vol.54
Pages: 49-62
Peer Reviewed
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[Journal Article] Depth Dependency of the Paleocene-EoceneCarbon Isotope Excursion2008
Author(s)
McCarren, H., Thomas, E., Hasegawa, T., Rohl, U., and Zachos, J. C
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Journal Title
paired benthic and terrestrial biomarker records(ODP Leg 208, Walvis Ridge) Geochemistr
DOI
Peer Reviewed
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[Presentation] Poul Shioler2011
Author(s)
Hasegawa, T., Crampton, J., Field, B
Organizer
Unique paleoenvironmental change in southern high latitude across the Cretaceous Cenomanian/Turonian boundary, 6^<th> International Symposium of IGCP507
Place of Presentation
China University of Geosciences, Beijing, China
Year and Date
2011-08-15
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