Yukio Isozaki          

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Professor (Earth Science)

    Department of Earth Science and Astronomy

    Graduate School of Arts and Sciences

    The University of Tokyo          

    3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan

    Phone: 81-3-5454-6608; FAX: 81-3-3465-3925 

    E-mail: isozaki@ea.c.u-tokyo.ac.jp


1978: B.S., Osaka City University, Japan

1980: M.S., Osaka City University, Japan

1981-1992: Assistant Professor, Yamaguchi University

1986: Ph. D, Osaka City University, Japan

1991-1992: Visiting scientist, US Geological Survey@Menlo Park  

1992-1993: Associate Professor, Yamaguchi University

1993-1997: Associate Professor, Tokyo Institute of Technology

1995-1996: Visiting Scholar, Harvard University

1997-2000: Associate Professor, The University of Tokyo

2000- present: Professor, The University of Tokyo

2011: Visiting scientist, University of Lille 1


His work started in the analysis of on-land exposed ancient accretionary complexes using microfossils (conodont, radiolaria) and geochronological dating.  He clarified the overall piled nappe structure of pre-Cenozoic units in Japan, and sunthesized the evolutionary history of Japan in terms of plate tectonics.   The main contribution is in formulating the concept of ocean plate strtaigraphy (OPS) of accretionary complex.  His study continues in analysis of tectonic erosion alternating with accretionary growth, by utilizing detrital zircon chronology in terrigenous clastics. 

His interest expands into the history of life, in particular, on mass extinction events in the past and relevant rapid biodiversification after that.  Main targets include the biggest extinction in history across the Paleozoic-Mesozoic boundary, a.k.a. P-T boundary, and Cambrian-Ordovician biodiversification. He coined the term “superanoxia” for the long-term oxygen depletion in the Permo-Triassic superocean, recognized a unique C-isotope episode named “Kamura event”, and proposed a possible explanation named “integrated plume winter scenario” for the mass extinction.     



1988: Young Scientist Award, Geological Society of Japan

1992: Best Article Award, Geological Society of Japan

1997: Koto Medal, Geological Society of Japan

1999: Best Article Award, Geological Society of Japan

2007: Geological Society Medal, Geological Society of Japan

2007: Fellow, Geological Society of America

2011: Best Article Award, Int. Assoc. Gondwana Research




Major research topics


1) Establishing the research style on ancient accretionary complexes exposed on land by utilizing micropaleontological (conodont, radiolaria) and geochronological methods in Japan, Philippines, California, and Mexico.  Further application is currently tested for much older units in Southern Siberia and Wales, UK.

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2) Clarifying the general structure of subduction-related (Cordilleran-type or Myashiro-type) orogenic belts composed of accretionary complex, high-P/T schists, and ophiolite (e.g., Japan).   Tectonic erosion is much emphasized recently on the basis of detrital zircon chronology for orogeny-related sandstones.



3) Finding the mass extinction-related superanoxia (long-term oxygen- depletion) across the Paleozoic-Mesozoic boundary and the Kamura cooling event immediately before the Guadalupian-Lopingian boundary extinction, and also proposing the “Integrated Plume Winter” scenario for the greatest mass killing in history.

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4) Geologically identifying the mid-oceanic, deep-sea hydrothermal environment for the oldest fossil on the Earth (3.5 Ga bacteria) in Pilbara, W. Australia.

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Recent Publications (2009-2015)




Saitoh, M., Ueno, Y., Isozaki, Y.,  Shibuya, T., Yao, J., Ji, Z., Shozugawa, K., Matsuo, M., Yoshida, N., 2015.   Authigenic carbonate precipitation at the end-Guadalupian (Middle Permian) in South China: an implication for the carbon sink in the past anoxic oceans.  Progress in Earth Planetary Sciences (submitted on Dec. 16, 2014; accepted on Nov. 6, 2015).

Sato, T., Sawaki, Y., Asanuma, H., Fujisaki, W., Okada, Y., Maruyama, S., Isozaki, Y., Shozugawa, K., Matsuo, M., Windley, B.F., 2015. Redox condition of the late Neoproterozoic pelagic deep ocean: 57Fe Mössbau er analyses of pelagic mudstones in the Ediacaran accretionary complex, Wales, UK.  Tectonophysics, 662, 472-480.

Aoki, K., Isozaki, Y., Sakata, S., Sato, T., Yamamoto, S., Hirata, T., 2015. Detrital zircon geochronology of sandstones from Jurassic and Cretaceous accretionary complexes in the Kanto Mountains, Japan: implications for arc provenance.  Engineering Geology of Japan, 5, 11-27.

Isozaki, Y., Ehiro, M., Nakahata, H., Aoki, K., Sakata, S., Hirata, T. 2015.  Cambrian arc plutonism in Northeast Japan and its significance for the earliest arc-trench system of proto-Japan: new U-Pb zircon ages of the oldest granitoids in the Kitakami and Ou Mountains.  Journal of Asian Earth Sciences 108, 136-149.

Kirschvink, J.L., Isozaki, Y., Raub, T., Kasuya, T., Yokoyama, M., Otofuji, Y., Shibuya, H., 2015.   Challenging the sensitivity limits of paleomagnetism: Magnetostratigraphy of weakly-magnetized Guadalupian-Lopingian (Permian) limestone from Kyushu, Japan.   Palaeogeography Palaeoclimatology Palaeoecology 418, 75-89.


Aoki, K., Isozaki, Y., Yamamoto, A., Sakata, S., and Hirata, T., 2015.   Mid-Paleozoic arc granitoids in SW Japan with Neoproterozoic xenocrysts from South China: New zircon U-Pb ages by LA-ICPMS.   Journal of Asian Earth Sciemces 97, 125-135.




Isozaki, Y., Poldvere, A., Bauert, H., Nakahata, H., Aoki, K., Sakata, S., Hirata, T., 2014.   Provenance shift in the Cambrian Baltica: detrital zircon chronology of Ediacaran-Cambrian sandstones in Estonia.   Estonian Journal of Earth Sciences 63, 251-256.


Saitoh, M., Ueno, Y., Isozaki, Y., Nishizawa, M., Shozugawa, K., Kawamura, T., Yao, J.X., Ji, Z.S., Takai, K., Yoshida, H., Matsuo, M., 2014.   Isotopic evidence for water-column denitrification and sulfate reduction preceding the end-Guadalupian (Permian) extinction.   Global and Planetary Change 123, 110-120.


Isozaki, Y., Kase, T., 2014.   The occurrence of a large gastropod Pleurotomariayokoyami from the Capitanian (Permian) Iwaizaki Limestone in NE Japan.  Paleontological Research 18, 250-257.


Isozaki, Y., 2014.  Memories of pre-Jurassic lost oceans: how to retrieve from extant lands.  Geoscience Canada 41, 283-311. 


Saitoh, M., Ueno, Y., Nishizawa, M., Isozaki, Y., Takai, K., Yao, J.X., Ji, Z.S., 2014.  Nitrogen isotope chemostratigraphy across the Permian-Triassic boundary at Chaotian, Sichuan, South China.   Journal of Asian Earth Sciemces 93, 113-128.


Fujisaki, W., Isozaki, Y., Sakata, S., Maki, K., Hirata, T., Maruyama, S., 2014.  Age spectra of detrital zircon of the Jurassic clastic rocks of the Mino-Tanba AC belt: constraints to the provenance of the mid-Mesozoic trench along East Asia.   Journal of Asian Earth Sciences 88, 62-73.


Poldvere, A., Isozaki, Y., Bauert, H., Aoki, K., Sakata, S., Hirata, T., 2014. Provenance of the Lower-Middle Paleozoic of Estonia in central Baltica: a possible link to Avalonia.  GFF 136, 214-217.


Isozaki, Y., Aoki, K., Sakata, S., Hirata, T., 2014.  The eastern extension of Paleozoic South China in NE Japan evidenced by detrital zircon U-Pb ages.   GFF 136, 116-119.


Bauert, H., Isozaki Y., Holmer, L.E., Kazumasa Aoki, K., Sakata, S., Hirata, T., 2014.  New U-Pb zircon ages of the Sandbian (Upper Ordovician) “Big K-bentonite” in Baltoscandia (Estonia and Sweden) by LA-ICPMS.  GFF 136, 30-33.


Aoki, K., Isozaki, Y., Kofukuda, D., Sato, T., Yamamoto, A., Maki, K., Yokoyama, T., Hirata, T., 2014.  Provenance diversification within an arc-trench system induced by the batholith development: the Cretaceous Japan case.   Terra Nova 26, 139-149.


Sato, T., Isozaki, Y., Hitachi, T., Shu, D.G., 2014.  A unique condition for the earliest diversification of the Cambrian SSF in Chengjiang, South China: phosphorite deposition in a restricted basin at Hongjiachong.  Gondwana Research 25, 1139-1152.


Shu, D.G., Isozaki, Y., Zhang, X.L., Han, J., Maruyama, S., 2014.  Birth and early evolution of metazoans.  Gondwana Research 25, 884-895.


Isozaki, Y., Shu, D.G., Maruyama, S., Santosh, M., 2014.  Beyond the Cambrian explosion: from galaxy to genome.  Gondwana Research 25, 881-883.


Kofukuda, D., Isozaki, Y., Igo, H., 2014.  A remarkable sea-level drop across the Guadalupian-Lopingian (Middle-Upper Permian) boundary in low-latitude mid-Panthalassa: Irreversible changes in accreted paleo-atoll limestones in Akasaka and Ishiyama, Japan.    Journal of Asian Earth Sciences 82, 47-65.




Nohda, S., Wang, B.S., You, C.F., Isozaki, Y., Uchio, Y., Buslov, M.M., Maruyama, S., 2013.  The oldest (Early Ediacaran) Sr isotope record of the mid-ocean surface seawater: Chemostratigaphic correlation of a paleo-atoll limestone in southern Siberia.  Journal of Asian Earth Sciences 77, 66-76.


Yamamoto, A. Isozaki, Y., 2013.  Historical review and current perspective of stromatolite study.  Journal of Geography-Tokyo 122, 791-806*.


Servais, T., Cecca, F., Harper, D.A.T., Isozkai, Y., MacNiocaill, C., 2013. Palaeozoic palaeogeographical and palaeobiogeographical nomenclature.  In Harper, D.A.T. and Servais, T., eds., Early Palaeozoic Biogeography and Palaeogeography.  Geol. Soc. London, Memoir 38, 23-31.


Saitoh, M., Isozaki, Y., Yao, J.X., Ji, Z.S., Ueno, Y., Yoshida, H., 2013. Lithostratigraphy across the Guadalupian-Lopingian (Middle-Upper Permian) boundary at Chaotian in Sichuan, South China: Secular change in sea level and redox condition.  Global Planetary Change 105, 180-192.


Kani, T., Hisanabe, C., Isozaki, Y., 2013. The Capitanian minimum of 87Sr/86 Sr ratio in the Permian mid-Panthalassan paleo-atoll carbonates and its demise by the deglaciation and continental doming.  Gondwana Research  24, 212-221.


Saitoh, M., Isozaki, Y., Ueno, Y., Yao, J.X., Ji, Z.S., 2013.  Middle-Upper Permian carbon isotope stratigraphy at Chaotian, South China: pre-extinction multiple upwelling of oxygen-depleted water onto continental shelf.  Journal of Asian Earth Sciences


Blodgett, R., Isozaki, Y., 2013.  The Altoconchidae, giant Permian Tethyan bivalve family, and the first occurrence in Alaska (McHugh complex of the Chigach Terrane) and the West ernHemishere.  Newsletter of Alaska Geological Society, 43(8), 5-8.




Aoki, K., Isozaki, Y., Yamamoto, S., Maki, S., Yokoyama, T., Hirata, T., 2012.  Tectonic erosion in Pacific-type orogenic belts: zircon response to Cretaceous tectonics in Japan.  Geology 40, 1087-1090.


Igisu, M., Takai, K., Ueno, Y., Nishizawa, M., Nunoura, T., Hirai, M., Kaneko,M., Naraoka, H., Shimojima, M., Hori, K., Nakashima, S., Ohta, H., Maruyama, S., Isozaki., Y., Domain-level identification and qualification of relative prokaryotic cell abundance in microbial communities by Micro-FTIR spectroscopy.  Environmental Microbiology Reports 4, 42-49.


Kasuya, T., Isozaki, Y., Igo, Hy., Constraining paleo-latitude of a biogeographic boundary in mid-Panthalassa: Fusuline province shift on the Late Guadalupian (Permian) migrating seamount.  Gondwana Research 21, 611-623.


Sato, T., Isozaki, Y., Seimiya, K., Matsuo, M., 2012.  Paleo-redox history of deep ocean across the Triassic-Jurassic boundary and the Toarcian event: Moessbauer study of Upper Triassic to mid-Jurassic deep-sea pelagic chert in Japan.  Hyperfine Interact (C), doi: 10.1007/s10751-011-0520-4 (in press)




Isozaki, Y., Aljinovic, D., Kawahata, H., 2011.  The Guadalupian (Permian) Kamura event in European Tethys.  Palaeogeogr. Palaeoclim. Palaeoecol. 308, 12-21.


Isozaki, Y., 2011.  Ordovician rocks in Japan.  In Gutierrez-Marco, J.C., Rabano, I., Garcia-Bellido, D., eds., Ordovician of the World.  Publication of Institute Geol. Miner. Espana, ser. Cuadernos Museo Geominero, 14, 251-252.


Aoki, K., Maruyama, S., Isozaki, Y., Otoh, S., Yanai, S., 2011.  Recognition of the Shimanto HP metamorphic belt within the traditional Sanbagawa belt: New perspectives of the Cretaceous-Paleogene tectonics in Japan. Journal of Asian Earth Sciences 42, 355-369.


Sato, T., Isozaki, Y., Shozugawa, K., Matsuo, M., 2011.  57Fe Mössbauer spectroscopic analysis of deep-sea pelagic chert: Effect of secondary alteration with respect to paleo-redox evaluation.  Jour. Asia. Earth Sci. 42, 1403-1410. 


Sekine, Y., Tajika, E., Tada, R., Hirai, T., Goto, K., Kuwatani, T., Goto, K., Yamamoto, S., Tachibana, S., Isozaki, Y., Kirschvink, J.L., 2011.  Manganese enrichment in the Gowganda Formation of the Paleoproterozoic Huronian Supergroup: a highly oxidizing shallow-marine environment after the last Huronian glaciation.  Earth Planetary Science Letters 307, 201-210.


Yamamoto, A., Lee, K.C., Isozaki, Y., 2011.  Lower Cretaceous stromatolites in Far East Asia: examples in Japan and Korea.   In Seckbach, J., Tewali, V. (eds.) Stromatolites.  Springer.  1-13.




Isozaki, Y., Aoki, K., Nakama, T., Yanai, S., 2010.  New insight into a subduction-related orogen: Reappraisal on geotectonic framework and evolution of the Japanese Islands.  Gondwana Research (accepted on Feb. 24, 2010)


Isozaki, Y., 2010. Reply to the comment by J. R. Ali on “Illawarra Reversal: the fingerprint of a superplume that triggered Pangean breakup and the end-Guadalupian (Permian) mass extinction” by Yukio Isozaki.  Gondwana Research 17, 718-720.


Kasahara, J., Sano, O., Geshi, N., Isozaki, Y., Maruyama, S., Yanai, S., 2010.  Overview of the special issue on “Geotectonic evolution of the Japanese Islands under new paradigms of the next generation (Part I-III)”.  Journal of Geography 119, 947-958.


Musashi, M., Isozaki, Y., and Kawahata, H., 2010.  Carbon and oxygen isotope record in the Early-Middle Guadalupian (Permian) mid-oceanic carbonate buildup on paleoseamount: the Akiyoshi limestone case in Japan.  Global Planetary Change (accepted on Mar. 26, 2010)




Isozaki, Y., 2009.  The Illawarra Reversal: a fingerprint of the superplume triggering Pangean breakup and end-Guadalupian (Permian) extinction.  Gondwana Research 15, 421-432.


Isozaki, Y., 2009.  Integrated plume winter scenario for the double-phased extinction during the Paleozoic-Mesozoic transition: G-LB and P-TB events from a Panthalassan perspective.  Jour. Asian Earth Sci. 36, 459-480.


Isozaki, Y. and Aljinovic, D., 2009.  End-Guadalupian extinction of the Permian gigantic bivalve Alatoconchidae: End of gigantism in tropical seas by cooling.  Palaeogeogr. Palaeoclim. Palaeoecol. 284, 11-21.


Kato, Y. and Isozaki, Y., 2009.  Comment on “Evaluation of paleo-oxygenation of the ocean bottom across the Permo-Triassic boundary” by Kakuwa (2008): Was the Late Permian deep-superocean really oxic?   Global Planet. Change 69, 79-81.


Maruyama, S., Yanai, S., Isozaki, Y., Hirata, D., 2009. Japan’s islands, geology.  In Gillespie, R.G., Clague, D.A. eds., Encyclopedia of Islands, p. 500-508, Univ. California Press, Berkley.


Metcalfe, I., Isozaki, Y., 2009. Current perspectives on the Permian-Triassic boundary and end-Permian mass extinction: preface.  Jour. Asian Earth Sci. 36, 407-412.


Yamamoto, A., Tanabe, K., and Isozaki, Y., 2009. The Lower Cretaceous fresh-water stromatolite in northern Kyushu, Japan.  Paleontol. Research 13, 139-149.



Pre-2009 articles


Category 1: Teconics


Kawai, T., Windley, B.F., Terabayashi, M., Yamamoto, H., Isozaki, Y., and Maruyama S. 2008.  Neoproterozoic glaciation in the mid-oceanic realm: an example from hemi-pelagic mudstones on Llanddwyn Island, Anglesey, UK.  Gondwana Research 14, 105-114


Kawai, T., Windley, B.F., Terabayashi, M., Yamamoto, H., Maruyama, S., and Isozaki, Y., 2007: 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.”  Jour. Metamorph. Geol. 25, 509-510.


Ota T., Utsunomiya A., Uchio Y., Isozaki Y., Buslov M.M., Ishikawa A., Maruyama S., Kitajima K., Kaneko Y., Yamamoto H. and Katayama I., 2007: Geology of the Gorny Altai subduction-accretion complex, south of Siberia: Tectonic evolution of an intra-oceanic arc in the Vendian-Cambrian Pacific.   Jour. Asian Earth Sci. 30, 666-695.


Kawai, T., Windley, B.F., Terabayashi, M., Yamamoto, H., Maruyama, S., & Isozaki, Y., 2007.  Geotectonic framework of the blueschist unit on Anglesey-Llyn, UK, and its role in the development of a Neoproterozoic accretionary orogen.  Precambrian Res. 153, 11-28.


Kawai, T., Windley, B.F., Terabayashi, M., Yamamoto, H., Maruyama, S., & Isozaki, Y., 2006: Mineral isograds and zones of the Anglesey blueschist belt, UK: implications for the metamorphic development of a subduction-accretion cmplex.   Jour. Metamorph. Geol. 24, 591-602.


Maruyama, S., Isozaki, Y., Kimura, G. & Terabayashi, M., 1997: Paleogeographic maps of the Japanese Islands: Plate tectonic synthesis from 750 Ma to present.   The Island Arc, 6, 121-142


Isozaki, Y., 1997b: Jurassic accretion tectonics in Japan.   The Island Arc, 6, 25-51


Isozaki, Y., 1997a: Contrasting two types of orogen in Permo-Triassic Japan: accretionary versus collisional.   The Island Arc, 6, 2-24


Isozaki, Y., 1996b:  Anatomy and genesis of a subduction-related orogen: A new view of geotectonic subdivision and evolution of the Japanese Islands.    The Island Arc, 5, 289-320


Kimura, G., Maruyama, S., Isozaki, Y. & Terabayashi, M., 1996: Well-preserved underplating structure of the jadeitized Franciscan complex, Pacheco Pass, California.  Geology, 24, 75-78


Isozaki, Y. & Blake, M.C.Jr., 1994: Biostratigraphic constraints on formation and timing of accretion in a subduction complex: An example from the Franciscan complex in northern California.  Jour. Geol., 102, 283-296


Matsuda, T. &  Isozaki, Y., 1991:  Well-documented travel history of Mesozoic pelagic cherts in Japan: from remote ocean to subduction zone.    Tectonics, 10, 475-499


Isozaki, Y., Maruyama, S. & Furuoka, F., 1990:  Accreted oceanic materials in Japan.  Tectonophysics, 181, 179-205


Sedlock, R. & Isozaki, Y., 1990: Lithology and biostratigraphy of Franciscan-like chert and associated rocks in west-central Baja California, Mexico.  Geol. Soc. Amer. Bull., 102, 852-864.


Isozaki, Y. & Itaya, T., 1990:  Chronology of Sanbagawa metamorphism.  Jour. Metamorph. Geol., 8, 401-411.



Category 2: Mass extinction, Permo-Triassic boundary event


Falkowski, P.G., Isozaki, Y., 2008.  The story of O2.  Science 322, 540-542.


Isozaki, Y., Yao, J.X., Ji, Z.S., Saitoh, M., Kobayashi, N., Sakai, H., 2008.  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 Sichuan.  Proc. Japan Acad., 84B, 344-353.


Aljinovic, D., Isozaki, Y., and Sremac. J., 2008.  The occurrence of giant bivalve Alatoconchidae from the Yabeina zone (Upper Guadalupian, Permian) iin European Tethys. Gondwana Research. 13, 275-287


Kani, T., Fukui, M., Isozaki, Y., and Nohda, S., 2008.  The Paleozoic minimum of 87Sr/86Sr initial ratio in the upper Guadalupian (Permian) mid-oceanic carbonates: a critical turning point in the Late Paleozoic.  Jour. Asian Earth Sci. 32, 22-33.


Isozaki, Y., Kawahata, H., and Minoshima, K., 2007.  The Capitanian (Permian) Kamura cooling event: the beginning of the Paleozoic-Mesozoic transition.  Palaeoworld 16, 16-30.


Isozaki, Y., Shimizu, N., Yao, J.X., Ji, Z.S., and Matsuda, T., 2007: End-Permian extinction and volcanism-induced environmental stress: Permian-Triassic boundary interval of a lower slope facies at Chaotian, South China.  Paleogeography, Paleoclimatology, Paleoecology 252, 218-238. 


Ji, Z.S., Yao, J.X., Isozaki, Y., Matsuda, T., and Wu, G.S., 2007: Conodont biostratigraphy across the Permian-Triassic boundary at Chaotian in northern Sichuan, China.  Paleogeography, Paleoclimatology, Paleoecology 252, 39-55. 


Isozaki, Y. 2007: Plume Winter scenario for biosphere catastrophe: the Permo-Triassic boundary case.  In Yuen, D., Maruyama, S., Karato, S. & Windley, B.F. (eds.), Superplume: beyond plate tectonics.  pp. 409-440, Springer, Dordrecht.


Isozaki, Y. and Ota, A., 2007: Reply to Comment by Ali, J.R. & Wignall, P.B. on "Fusuline biotic turnover across the Guadalupian-Lopimgian (Middle-Upper Permian) boundary in mid-oceanic carbonate buildups: Biostratigraphy of accreted limestone in Japan."  Jour. Asia. Earth Sci. 30, 201-203.


Musashi, M., Isozaki, Y., Koike, T. & Kreulen, R., 2007: Carbon isotope study on mid-Panthalassa shallow-waterlimestone across the Permo-Triassic boundary: Reassessment.  Royal Netherlands Acad. Art. Sci., Spec. Publ. 131-138.


Isozaki, Y., 2007: Guadalupian-Lopingian boundary event in mid-Panthalassa: correlation of accreted deep-sea chert and mid-oceanic atoll carbonate.   Royal Netherlands Acad. Art. Sci., Spec. Publ. 111-124.


Isozaki, Y., Kawahata, H. & Ota, A., 2007: A unique carbon isotope record across the Guadalupian-Lopingian (Middle-Upper Permian) boundary in mid-oceanic paleoatoll carbonates: the high-productivity Kamura event and its collapse in Panthalassa.    Global Planetary Changes 55, 21-38.


Ota, A. & Isozaki, Y., 2006:  Fusuline biotic turnover across the Guadalupian-Lopimgian (Middle-Upper Permian) boundary in mid-oceanic carbonate buildups: Biostratigraphy of accreted limestone in Japan.  Jour. Asia. Earth Sci. 26, 353-368.


Isozaki, Y., 2006: Guadalupian (Middle Permian) Giant Bivalve Alatoconchidae from a Mid-Panthalassan Paleo-Atoll Complex in Kyushu, Japan: A unique community associated with Tethyan fusulines and corals.  Proc. Japan Acad. 82B, 25-32.


Isozaki, Y., Yao, J.X., Matsuda, T., Sakai, H., Ji, Z.S., Shimizu, N., Kobayashi, N., Kawahata, H., Nishi, H., Takano, M. & Kubo, T., 2004: Stratigraphy of the Middle-Upper Permian and Lowermost Triasic at Chaotian, Sichuan, China - Record of end-Permian double mass extinction events-.   Proc. Japan Acad., 80B, 10-16


Matsuo, M., Kubo, K. & Isozaki, Y., 2003: Moessbauer spectroscopic study on characterization of iron in the Permian to Triassic deep-sea chert from Japan.   Hyperfine Interact. (C), 5, 435-438


Kato, Y., Nakao, K. & Isozaki, Y., 2002: Geochemistry of Late Permian to Early Triassic pelagic cherts from southwest Japan: implicationa for an oceanic redox change.   Chem. Geol., 182, 15-34


Isozaki, Y., 2001: An extraterrestrial impact at the Permian-Triassic boundary?   Science, 293, 2343


Musashi, M., Isozaki, Y., Koike, T. & Kreulen, R., 2001: Stable carbon isotope signature in mid-Panthalassa shallow-water carbonates across the Permo-Triassic boundary: evidence for 13C-depleted ocean.  Earth Planet. Sci. Lett. 191, 9-20.


Isozaki, Y.  & Ota, A., 2001: Middle/Upper Permian (Maokouan/Wuchapingian) boundary in mid-oceanic paleo-atoll limestone in Kamura and Akasaka, Japan.   Proc. Japan Acad., 77B, 104-109


Bowring, S.A., Erwin, D.H. & Isozaki, Y., 1999: The Tempo of Mass Extinction and Recovery: The End-Permian Example.   Proc. Natl. Acad. Sci. USA, 96, 8827-8828


Isozaki, Y., 1997c: Permo-Triassic boundary Superanoxia and stratified superocean: Records from lost deep-sea.    Science, 276, 235-238


Isozaki, Y., 1994: Superanoxia across the Permo-Triassic boundary  recorded in pelagic chert in Japan.  Canad. Soc. Petr. Geol.. Memoir, no. 17, 805-812



Category 3: Precambrian geology/paleontology


Uchio, Y., Isozaki, Y., Busulov, M.M., Maruyama, S., 2008.  Occurrence of phosphatic microfossils in an Ediacaran-Cambrian mid-oceanic paleo-atoll limestone of southern Siberia  Gondwana Research 14, 183-192


Ueno, Y., Yamada, K., Yoshida, N., Maruyama, S. & Isozaki, Y., 2006: Evidence from fluid inclusions for microbial methanogenesis in the early Archaean.  Nature 440, 516-519.


Ueno, Y., Isozaki, Y. & Macnamara, K., 2006: Coccoid-like microstructures in a 3.0 Ga chert from Western Australia.  Int. Geol. Rev. 48, 78-88.


Uchio, Y., Isozaki, Y., Ota, T., Utsunomiya, A., Buslov, M.M., & Maruyama, S, 2004: The oldest mid-oceanic carbonate buildup complex: setting and lithofacies of the Vendian (Neoproterozoic) Baratal limestone in the Gorny Altai Mountains, Siberia.  Proc. Japan Acad. 80B, 422-428


Ueno, Y., Yoshioka, H., Maruyama, S. & Isozaki, Y., 2004: Stable isotopes and petrography of 13C-depleted kerogen in ca. 3.5 Ga hydrothermal silica dikes in the North pole area, Western australia: implications for the early life in the Archean sub-seaflor.   Geochim. Cosmochim. Acta, 68, 573-589


Ueno, Y., Isozaki, Y., Yurimoto, H. & Maruyama, S., 2001: Carbon isotopic signatures of individual Archean microfossils(?) from Western Australia.    Intern. Geol. Rev., 43, 196-212


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