High resolution analysis of the Cretaceous Oceanic Anoxic Events in France
Project/Area Number |
18740316
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Geology
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Research Institution | Hokkaido University (2006, 2008) Tokai University (2007) |
Principal Investigator |
TAKASHIMA Reishi Hokkaido University, 創成科学共同研究機構, 特任助教 (00374207)
|
Project Period (FY) |
2006 – 2008
|
Project Status |
Completed (Fiscal Year 2008)
|
Budget Amount *help |
¥3,850,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2006: ¥2,000,000 (Direct Cost: ¥2,000,000)
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Keywords | フランス / 白亜紀 / 海洋無酸素事変 / 浮遊性有孔虫 / 炭素同位体 / OAE 2 / 浮遊性有孔虫化石 / ボコンチアン堆積盆地 / テチス海 / 地球史 / 温暖化地球 |
Research Abstract |
白亜紀中期に発生した海洋無酸素事変のうち、フランスに露出する白亜紀前期のOAE1b層(約1億1000万年前)と白亜紀後期のOAE2層(約9350万年前)について高分解能で解析を行った。 その結果、OAE1bに関しては、海洋循環の停滞と陸からの栄養塩の供給の増加の両方の要因が重なった時により発生し、数千年サイクルで無酸素水塊の発達と解消が繰り返されていたことがわかった。 一方、OAE2に関しては、陸からの栄養塩の供給はそれほど影響がなく、海洋循環の停滞が主要な原因であることが示された。 無酸素水塊の発達はOAE1bでは水層には及ばなかったのに対して、OAE2h水層のかなり浅い部分まで無酸素状態であったことが示唆され、両イベントでは形成原因や無酸素水塊の発達規模、海洋生物への影響が異なっていたことが明らかになった。
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Report
(4 results)
Research Products
(48 results)
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[Journal Article] Litho-, bio- and chemostratigraphy across the Cenomanian/Turonian boundary (OAE 2) in the Vocontian Basin of southeastern France. Palaeogeography2009
Author(s)
Takashima, R., Nishi, H., Hayashi, K., Okada, H., Kawahata, H., Yamanaka, T., Fernando, A. G., Mampuku, M
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Journal Title
Palaeoclimatology, Palaeoecology 273
Pages: 61-74
Related Report
Peer Reviewed
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[Journal Article] Litho-, bio- and chemostratigraphy across the Cenomanian/Turonian boundary (OAE 2) in the Vocontian Basin of southeastern France2009
Author(s)
Takahima, R., Nishi, H., Hayashi , K., Okada, H., Kawahata, H., Yamanaka, T., Fernando, A. G., Mampuku, M.
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology 273
Pages: 61-74
Related Report
Peer Reviewed
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[Journal Article] Geology and sedimentary environments of the Pleistocene Setana Formation in the Kuromatsunai District, Southwestern Hokkaido, Japan. In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity2008
Author(s)
Takashima, R., Dick, M. H., Nishi, H., Mawatari, S. F., Nojo, A., Hirose, M., Gautam, P., Nakamura, K., Tanaka, T
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Journal Title
Proc. Int. Symp. "The Origin and Evolution of Natural Diversity 1-5
Pages: 75-82
Related Report
Peer Reviewed
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[Journal Article] Experimental study of the use of the stable isotopic composition of calcareous microfossils in shallow marine sediments for reconstructing paleoenvironment, and a comparison with the MART index. In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp2008
Author(s)
Ishimura T., Dick, M.H., Takashima, R., Hirose, M., Gautam, P., Nishi, H. and Tsunogai, U
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Journal Title
The Origin and Evolution of Natural Diversity 1-5
Pages: 109-114
Related Report
Peer Reviewed
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[Journal Article] Habitats of Bivalves in the Lower-Cretaceous Aptian Tanohata and Aptian to Albian Hiraiga Formations, Iwate Prefecture, Northeastern Japan. In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp2008
Author(s)
Komatsu, T., Yoshihara, K., Dick M. H., Takashima, R., Ostrovsky, A., and Nishi, H
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Journal Title
The Origin and Evolution of Natural Diversity 1-5
Pages: 163-170
Related Report
Peer Reviewed
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[Journal Article] Geology and sedimentary environments of the Pleistocene Setana Formati on in the Kuromatsunai Distdct, Southwestern Hokkaido, Japan.2008
Author(s)
Takashima, R.・Dick, M. H.・Nishi, H.・Mawatari, S. F.・Nojo, A.・Hirose, M., Gautam, P.・Nakamura, K.・Tanaka, T.
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Journal Title
In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp. The Origin and Evolution of Natural Diversity
Pages: 75-82
Related Report
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[Journal Article] Rockmagnetic characterization of the Setana and Chiraigawa Formations in SW Hokkaido (Soebetsu River, Kuromatsunai)2008
Author(s)
Gautam, P.・Takashima, R.・Dick. M.H.・Kanamatsu, T.・Rijal, M.L.・Nishi, H.・Mawatari. S.F.
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Journal Title
In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp. The Origin and Evolution of Natural Diversity
Pages: 101-107
NAID
Related Report
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[Journal Article] Rockmagnetic characterization of the Setana and Chiraigawa Formations in SW Hokkaido (Soebetsu River, Kuromatsunai). In H. Okada, S. F. Mawatari, N. Suzuki and P2007
Author(s)
Gautam, P., Takashima, R., Dick, M.H., Kanamatsu, T., Rijal, M.L., Nishi H.and Mawatari, S.F
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Journal Title
Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp. "The Origin and Evolution of Natural Diversity 1-5
Pages: 101-107
Related Report
Peer Reviewed
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[Journal Article] Application of MART Analysis to Infer Paleoseasonality in a Pleistocene Shallow Marine Benthic Environment. In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp2007
Author(s)
Dick, M. H., Hirose, M., Takashima, R., Ishimura, T., Nishi, H. and Mawatari, S. F
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Journal Title
The Origin and Evolution of Natural Diversity 1-5
Pages: 83-91
Related Report
Peer Reviewed
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[Journal Article] Overview of Pleistocene Bryozoans in Japan. In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp2007
Author(s)
Dick, M. H., Takashima, R., Komatsu, T., Kaneko, N., Mawatari, S. F
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Journal Title
The Origin and Evolution of Natural Diversity 1-5
Pages: 93-99
Related Report
Peer Reviewed
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[Journal Article] Depositional Environments Revealed From Biomarkers in Sediments Deposited During the Mid-Cretaceous Oceanic Anoxic Events (OAEs) in the Vocontian Basin (SE France). In H. Okada, S. F. Mawatari, N. Suzuki and P. Gautam (eds.), Origin and Evolution of Natural Diversity, Proc. Int. Symp2007
Author(s)
Okano, K., Sawada, K., Takashima, R Nishi, H. and Okada, H
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Journal Title
The Origin and Evolution of Natural Diversity 1-5
Pages: 233-238
Related Report
Peer Reviewed
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[Journal Article] Paleoceanography of the northwestern Pacific during the Albian2007
Author(s)
Yamamura, M., Kawahata, H., Matsumoto, K., Takashima, R. and Nishi, H
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology 254
Pages: 477-491
Related Report
Peer Reviewed
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[Journal Article] First finding of a Cretaceous cheilostome bryozoan from Hokkaido2006
Author(s)
Ostrovsky, A. N., Takashima, R., Dick, M. H., Grischenko, A. V., Nishi, H. and Mawatari, S. F
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Journal Title
Cretaceous Research 27
Pages: 859-862
Related Report
Peer Reviewed
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