Shallow water chemosynthetic assemblages occur in response to glacio-eustasy
| Project/Area Number |
16204041
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Yokohama National University |
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Principal Investigator |
MAJIMA Ryuichi Yokohama National University, Faculty of Education and Human Sciences, Professor (30202310)
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| Co-Investigator(Kenkyū-buntansha) |
WADA Hideki Shizuoka University, Faculty of Sciences, Professor (20126791)
KAMEO Kouji Chiba University, Faculty of Sciences, Assistant Professor (00312968)
KITAZATO Hiroshi Japan Agency for Marine-Earth Science and Technology, Institute For Research on Earth Evolution, プログラムディレクター (00115445)
NAKAMURA Eiko Yokohama National University, Faculty of Education and Human Sciences, Professor (10017733)
OUKOUCHI Naohiko Japan Agency for Marine-Earth Science and Technology, Institute For Research on EARth Evolution, Group Leader (00281832)
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| Project Period (FY) |
2004 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥47,190,000 (Direct Cost: ¥36,300,000、Indirect Cost: ¥10,890,000)
Fiscal Year 2007: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2006: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Fiscal Year 2005: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Fiscal Year 2004: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Keywords | Chemosynthetic fossil assemblages / Methane seep / Glacioeustacy / Kazusa Group / Miyazaki Group / Philippines / Global warming events / Stable isotopes / 陸棚 / 温暖化 |
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| Research Abstract |
Followings are our main results of the study.
1. Cores recovered normal to bedding plane and yielding fossil cold seep assemblage indicate that seep was periodically activated in response with glacio-eustacy reconstructed on oxygen isotope fluctuations of foraminifers.
2. Authigenic carbonates of ancient seep sites are well preserved a substratum-normal profile of interstitial geochemical characteristics. We can designate ancient sulfate-methane interface(SMI)horizons in the cores based on carbon isotope ratios where archaeon biomarkers are greatly concentrated.
3. We discover slump structures in some strata, about 500m in paleodepth, in association with allochthonous cold seep bivalves. These occurrences evidently suggest drastic decomposition events of methane hydrates.
4. We discover a modem and a thousand years ago cold seep bivalve communities in the shelf environments shallower than 200m in depth. These are the shallowest cold seep bivalve communities so far as we know.
5. We first discover cold seep fossil assemblages from Neogene of Philippines. The Philippine assemblages show greatly wide range of mode of occurrences.
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Report
(5 results)
Research Products
(36 results)
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[Journal Article] cold-seep assemblages from Lyte Island2007
Author(s)
Majima, R., Kase, T., Kawagata, S., Yolanda, A. M., Ogino, K., Maeda, M
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Journal Title
Philippines, Journal of Geography 116, 5
Description
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[Journal Article] A new exposure of a cold-seep assemblage of the Pliocene Takanabe Formation, Miyzaki Group, Fossils2005
Author(s)
Majima, R., Shibata, T., Taguchi, K., Saito, T., Wada, H
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Journal Title
Palaeontological Society of Japan 78
Pages: 1-2
Description
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[Journal Article] New Knowledge of a cold-seep assemblage of the Pliocene Takanabe Formation, Miyzaki Group, Fossils2005
Author(s)
Majima, R., Shibata, T, Taguchi, K., Saito, T., Wada, H
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Journal Title
Palaeontological Society of Japan 78
Pages: 59-63
Description
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[Presentation] Stable isotope and faunal analyses of Planktonic foraminifera from Middle Pleistocene Kakinokidai Formation of the Kazusa Group, in Kawayatsu, Chiba Prefecture, central Japan2008
Author(s)
Ochi, M., Miura, M., Hitomi, M., Majima, R., Kawagata, S., Sakai, S., Kitazato, K
Organizer
The 157th regular meeting of the Palaeontological Society of Japan
Place of Presentation
Utsunomiya
Year and Date
2008-02-02
Description
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[Presentation] The estimation of cold seep environment in the Upper Pliocene Takanabe Formation, Kyushu Island, Japan2008
Author(s)
Arai, Y, Ishida, H., Majima, R., Nakamura, E., Wada, H., Sakai, S
Organizer
The 157th regular meeting of the Palaeontological Society of Japan
Place of Presentation
Utsunomiya
Year and Date
2008-02-02
Description
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[Presentation] Paleoenvironmental analysis using foraminiferal fossils in the Upper Pliocene Takanabe Formation, Kyushu Island, Japan2008
Author(s)
Ishida, H., Arai, Y, Majima, R., Okada, M., Kameo, K., Sakai, S., Kitazato, H., Kawagata, S
Organizer
The 157th regular meeting of the Palaeontological Society of Japan
Place of Presentation
Utsunomiya
Year and Date
2008-02-02
Description
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[Presentation] Core observations of a cold seep assemblage occurring in the lower Pleistocene fore-arc fill deposits at Segami, Pacific side of central Japan2007
Author(s)
Ryuichi, Majima, Atsuro, Kouda, Misato, Tsuboi, Kazuhiro, Kato, Hideki, Wada, Hiroshi, Kitazato, Nohiko, Ohkouchi, Eiko, Nakamura, Kouji, Kameo
Organizer
Japan Geoscience Union Meeting 2007
Place of Presentation
Makuhari Mess
Year and Date
2007-05-22
Description
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[Presentation] A cold-seep assemblage associated with authigenic carbonate, Takanabe Formation, Miyazaki Group, Japan2007
Author(s)
Yu, Arai, Hiroyuki, Ishida, Ryuichi, Majima, Koji, Kameo, Shungo, Kawagata, Hiroshi, Kitazato, Eiko, Nakamura, Makoto, Okada, Saburo, Sakai, Hideki, Wada
Organizer
Japan Geoscience Union Meeting 2007
Place of Presentation
Makuhari Mess
Year and Date
2007-05-22
Description
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[Presentation] A cold-seep assemblage associated with authigenic carbonates from the middle Pleistocene Kakinokidai Formation, Kazusa Group, Japan2007
Author(s)
Misa, Miura, Maynmi, Ochi, Makiko, Hitomi, Ryuichi, Majima, Shungo, Kawagata, Hiroshi, Kitazato, Saburo, Sakai, Hidek, Wada
Organizer
Japan Geoscience Union Meeting 2007
Place of Presentation
Makuhari Mess
Year and Date
2007-05-22
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Reconstruction of sedimentary environment in early Pleistocene using archaeon biomarkers2007
Author(s)
Misato, Tsuboi, Eiko, Nakamura, Ryuichi, Majima, Hiroshi, Kitazato, Hisami, Suga, Kohei, Matsumoto, Yoshito, Chikaraishi, Naohiko, Ohkouchi
Organizer
Japan Geoscience Union Meeting 2007
Place of Presentation
Makuhari Mess
Year and Date
2007-05-22
Description
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[Presentation] Shallow water cold seep activities were synchronizer with glacio-eustasy -a case study of Kazusa Group, southern part of Yokohama City-2005
Author(s)
Kouda, A. Majima, R., Kitazato, H., Kitazaki, H., Wada, H., Kato, K
Organizer
The 2005 annual meeting of the Palaeontological Scoiety of Japan
Place of Presentation
Tokyo
Year and Date
2005-07-02
Description
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