2007 Fiscal Year Final Research Report Summary
Study of end-Paleozoic double-phased mass extinction : the G-L boundary and P-T boundary events
Project/Area Number |
16204040
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Stratigraphy/Paleontology
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Research Institution | The University of Tokyo |
Principal Investigator |
ISOZAKI Yukio The University of Tokyo, Dept. Earth Science & Astronomy, Professor (90144914)
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Co-Investigator(Kenkyū-buntansha) |
MATSUO Motoyuki University Tokyo Komaba, Dept. Chemistry, Professor (10167645)
KAWAHATA Hodaka University Tokyo Komaba, Dept. Marine Chemistry, Professor (20356851)
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Project Period (FY) |
2004 – 2007
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Keywords | mass exticntion / P-T boundary / G-L boundary / carbon isotope ratio / Sr isotope ratio / Permian / Kamura event / plume winter |
Research Abstract |
During the 4 years of research under the support of this grant-in-aid, we conducted field studies in the northern Sichuan in China, central Kyushu in Japan, and the Velebit mountains in Croatia, and in door geochemical analyses. These led the following results and conclusions. 1) An unusually high positive values of carbon isotope ratio was detected for the first time from a 5 million years interval immediately before the G-L boundary mass extinction. We named this unique event of a global context the "Kamura event" after the study area in Kyushu. This implies the increase in primary productivity in the superocean, mass consumption of atmospheric C02, decline in greenhouse effect, and resultant global cooling. 2) The simultaneous extinction of the Guadalupian shallow marina fauna composed of gigantic bivalves (Alatoconchidae), large-tested fusulines and rugose corals was documented both in Tethys and the superocean Panthalassa. These "tropical trio" shared the same habit of photosymbiosi
… More
s with algae/bacteria under oligtrophic environments, and they were terminated probably by cooling through the collapse of photosymbiosis. 3) We confirmed that the Sr-isotope ratio reached the minimum of the Phanerozoic in the late Guadalupian. This apparently coincided with the greatest sea-level drop in the Phanerozooic. These indicate the end-Guadalupian event was related to the initial Pangean breakup in the late Middle Permian. 4) We found that the P-T boundary interval in South China is characterized by frequent activity of felsic (explosive) volcanism. Geochemical and mineralogical lines of evidence suggest that this volcanism was related to mantle plume activity. The above-listed results partly prove thus positively support the "Plume Winter" scenario that the head investigator proposed more than 10 years ago. As the results contain several new finds and the first perspectives, we already reported in 29 articles in international scientific journals, 2 books, and 6 oral presentations at international meetings including 3 keynote speeches. Less
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Research Products
(73 results)
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[Journal Article] Rapid sea-level change in the Late Guadalupian (Permian) on the Tethyan side of South China: litho- nd biostratigraphy of the the Chaotian section in northern Sichuan.2008
Author(s)
Isozaki, Y., Yao, J. X., JI, Z. S., Saitoh, M., Kobayashi, N., Sakai. H.
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Journal Title
Proc. Japan Academy 84B(In press)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Neoproterozoic glaciation in the mid-oceanic realm: an example from he mi-pelagic mudstone on Llanddwyn Island, Anglesey, UK.2008
Author(s)
Kawai, T., Windley, B. F., Terabayashi, M., Yamamoto, H., Isozaki, Y. and Maruyama, S.
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Journal Title
Gondwana Research 14(In press)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Rapid sea-level change in the Late Guadalupian (Permian) on the Tethyan side of South China : litho-and biostratigraphy of the Chaotian section in northern Sichuan2008
Author(s)
Isozaki, Y., Yao, J. X., Ji, Z. S., Saitoh, M., Kobayashi, N., Sakai, H.
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Journal Title
Proc. Japan Acad. 84(in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Neoproterozoic glaciation in the mid-oceanic realm : an example from hemi-pelagic mudstone on Llanddwyn Island, Anglesey, UK.2008
Author(s)
Kawai, T., Windley, B. F., Terabayashi, M., Yamamoto, H., Isozaki, Y., Maruyama, S.
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Journal Title
Gondwana Research 14(in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] End-Permian extinction and volcanism-induced environmental stress: Permian-Triassic boundary interval of a lower slope facies at Chaotian, South China.2007
Author(s)
Isozaki, Y., Shimizu, N., Yao, J. X., Ji, Z. S., Matsuda, T
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology 252
Pages: 218-238
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Conodont biostratigraphy across the Permian-Triassic boundary at Chao-tian in northern Sichuan, China.2007
Author(s)
Ji, Z. S., Yao, J. X., Isozaki, Y. Matsuda, T., Wu, G. S.
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Journal Title
Palaeogeography, Palaeoclimatology, Palaeoecology 252
Pages: 39-55
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Reply to discussion by Jack Treagus on "Mineral isograd and zones of the Anglesey blueschist belt, UK: implications for the metamorphic development of a Neoproterozoic subduction-accretion complex. Jour. Metamorph. Geol., 24, 591-602."2007
Author(s)
Kawai, T., Windley; B. F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Jour. Metamorph. Geol. 25
Pages: 509-510
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Geology of the Gorny Altai subduction-accretion complex, southern Siberia: Tectonic evolution of the Ediacaranan-Cambrian intra-oceanic arc-trench system.2007
Author(s)
Ota T., Utsunomiya A., Uchio Y., Isozaki Y., Buslov M. M., Ishikawa A., Maruyama S., Kitajima K., Kaneko Y., Yamamoto H. and Katayama I.
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Journal Title
Jour. Asian Earth Sci. 30
Pages: 666-695
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Geotectonic framework of the blueschis unit on Anglesey-Llyn UK, and its role in the development of a Neoproterozoic accretionary orogen.2007
Author(s)
Kawai, T., Windley, B. F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Precambrian Research 153
Pages: 11-28
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Mineral isograd and zones of the Anglesey blueschist belt, UK: implications for the metamorphic development of a Neoproterozoic subduction-accretion complex.2007
Author(s)
Kawai, T., Windley, B.F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Jour. Metamorph. Geol. 24
Pages: 591-602
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Conodont biostratigraphy across the Permian-Triassic boundary at Chaotian in northern Sichuan, China2007
Author(s)
J i, Z. S., Yao, J. X., Isozaki, Y., Matsuda, T., Wu, G. S.
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Journal Title
Palaeogeogr. Palaeocllm. Palaeoecol. 252
Pages: 39-55
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Reply to discussion by Jack Treagus on "Mineral isograd and zones of the Anglesey blueschist belt, UK : implications for the metamorphic development of a Neoproterozoic subduction-accretion complex. Jour. Aletamorpli Geol., 24, 591-602."2007
Author(s)
Kawai, T., Windley, B. F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Jour. Metamorph. Geol. 25
Pages: 509-510
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Geology of the Gorny Altai subduction-accretion complex, southern Siberia : Tectonic evolution of the Ediacaranan-Cambrian intra-oceanic arc-trench system2007
Author(s)
Ota T., Utsunomiya A., Uchio Y., Isozaki Y., Buslov M. M., Ishikawa A., Maruyama S., Kitajima K., Kaneko Y., Yamamoto H., Katayama I.
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Journal Title
Jour. Asian Earth Sci. 30
Pages: 666-695
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Geotectonic framework of the blueschis unit on Anglesey-Llyn UK, and its role in the development of a Neoproterozoic Accretionary orogen2007
Author(s)
Kawai, T., Windley, B. F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Precambrian Research 153
Pages: 11-28
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Mineral isograd and zones of the Anglesey blueschist belt, UK : implications for the metamorphic development of a Neoproterozoic subduction-accretion complex2006
Author(s)
Kawai, T, Windley, B. F., Terabayashi, M., Yamamoto, H., Maruyama, S., Isozaki, Y.
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Journal Title
Jour. Afetamorph. Geol. 24
Pages: 591-602
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] The oldest mid-oceanic carbonate buildup complex: setting and lithofacies of the Vendian(Neoproterozoic)Baratal limestone in the Gorny Altai Mountains, Siberia.2004
Author(s)
Uchio, Y., Isozaki, Y., Ota, T., Utsunomiya, A., Buslov, M. M., and Maruyama, S
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Journal Title
Proc. Japan Academy 80B
Pages: 422-428
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Detailed stratigraphy across the Permo-Triassic boundary at Chaotian in Sichuan, China.2004
Author(s)
Shimizu, N., Isozaki, Y., Matsuda, T., Yao, J. X., and Ji, Z. S.
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Journal Title
Jour. Geogr. 113
Pages: 87-106
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] The oldest mid-oceanic carbonate buildup complex : setting and lithofacies of the Vendian (Neoproterozoic) Baratal limestone in the Gorny Altai Mountains, Siberia2004
Author(s)
Uchio, Y., Isozaki, Y., Ota, T., T. Utsunomiya, A. Buslov, M. M., Maruyama, S.
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Journal Title
Proc. Japan Acad. 80B
Pages: 422-428
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Detailed stratigraphy across the Permo-Triassic boundary at Chaotian in Sichuan, China2004
Author(s)
Shimizu, N., Isozaki, Y., Matsuda, T., Yao, J. X., Ji, Z. S.
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Journal Title
Jour. Geogr 113
Pages: 87-106
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Stratigraphy of the Middle-Upper Permian and Lowermost Triasic at Chaotian, Sichuan, China-record of Late Permian double mass extinction events2004
Author(s)
Isozaki, Y., Yao, J. X., Matsuda, T., Sakai, H., Ji, Z. S., Shimizu, N., Kobayashi, N., Kawahata, H., Nishi, H., Takano, M. Kubo, T.
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Journal Title
Proc. Japan Acad. 80B
Pages: 10-16
Description
「研究成果報告書概要(欧文)」より
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