Analysis of internal structure of Central Asian orogenic belt

• Project/Area Number: 16F16330
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 外国
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: 磯崎 行雄 東京大学, 大学院総合文化研究科, 教授 (90144914)
• Co-Investigator(Kenkyū-buntansha): BOLD UYANGA 東京大学, 総合文化研究科, 外国人特別研究員
• Project Period (FY): 2016-11-07 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥2,200,000 (Direct Cost: ¥2,200,000); Fiscal Year 2018: ¥600,000 (Direct Cost: ¥600,000); Fiscal Year 2017: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2016: ¥600,000 (Direct Cost: ¥600,000)
• Keywords: 中央アジア造山帯 / 原生代 / 大陸塊 / ジルコン / U-Pb年代 / モンゴル / 古アジア海 / Tuva-Mongolia帯 / 中央アジア / カンブリア紀 / 造山運動 / 花崗岩類 / 元素組成分析 / 同位体層序

Outline of Annual Research Achievements

超大陸パンゲアの分裂後、世界の主要な大陸塊は一旦分散し、新たにアジアを中心とした次の超大陸が形成されつつある。その集積中心であるアジア中核部をなすシベリア、タリム、および北中国地塊に挟まれたモンゴルを中心とした中央アジア造山帯の地史の解明が重要であり、モンゴル国内には中央アジア造山帯の複数の主要構成要素が産する。しかし、これまでその形成史の詳細はほとんど解明されていなかった。その主原因は、正確な年代データの欠落にあった。本研究計画では、Zuva-Mongolia帯およびSuliyanka帯の野外地質調査を2018年春に実施し、採取した岩石試料について年代測定と地球化学的検討を進めた。とくに堆積岩、変成岩および火成岩に含まれるジルコンを大量に抽出し、多数のU-Pb年代を測定した。さらに全岩化学組成および各種同位体比の分析を行なった。その結果、これまで年代未詳であった上記２帯の複数の花崗岩体について、原生代中期から後期にあたる初めての正確なU-Pb放射性年代値が得られた。これrなおデータは、モンゴル内の多くの地塊が従来想定されてきた北方のシベリア大陸塊起源ではなく、別の大陸地塊（北中国やタリム、あるいはそれ以外）由来であることを示唆する。これによって、中央アジア造山帯の中核をなすモンゴル部分が持つ古アジア海中でのテクトニクス上の意義が明確になり、さらにその大規模海洋が閉じていった過程に大きな年代制限を加えた。これらの成果は、複数回の国際学会での口頭発表および国際的な学術誌に３編の英文論文として投稿された。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Mongolian Univ. Sci. & Tech.(モンゴル)
• [Int'l Joint Research] Harvard Univ.(米国)
• [Int'l Joint Research] Academy of science(ロシア連邦)
• [Int'l Joint Research] Mongolian Univ. Science & Tech.(モンゴル)
• [Int'l Joint Research] Harvarad Univ./UC Berkley(米国)
• [Int'l Joint Research] Cambridge Univ.(英国)
• [Int'l Joint Research] Mongolian Univ. Sci. Tech.(モンゴル)
• [Int'l Joint Research] Massachussetts Inst. Tech./Univ. Idaho(米国)
• [Journal Article] The Neoarchean-Neoproterozoic basement of the Tuva-Mongolia Zone in the Central Asian orogenic belt. (2019)
  • Author(s): Bold, U., Isozaki, Y., Aoki, S., Sawada, H., Sakata, S.
  • Journal Title: Gondwana Research Volume: 印刷中
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of dolomitization on isotopic records from Neoproterozoic carbonates in southwestern Mongolia: (2019)
  • Author(s): Bold, U., Schrag, D. P., Higgins, J. A., Erdenebayar, J., and Macdonald, F. A.
  • Journal Title: Geological Society of America Bulletin Volume: 印刷中
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] An early diagenetic deglacial origin for basal Ediacaran “cap dolostones”. (2019)
  • Author(s): Ahm, C.A., Maloof, C.A., Macdonald, A.F., Hoff,am, P.F., Bjerrum, J.C., Bold, U., Rose, V.C., Strauss, V.J., Higgins, J.H.
  • Journal Title: Earth and Planetary Science Letters Volume: 506 Pages: 292-307
  • DOI: 10.1016/j.epsl.2018.10.046
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A visage of Early Paleozoic Japan; geotectonic and paleobiogeographical significances of Greater South China. (2019)
  • Author(s): Isozaki, Y.
  • Journal Title: Island Arc Volume: 28 Issue: 3
  • DOI: 10.1111/iar.12296
  • Peer Reviewed / Open Access
• [Journal Article] Asian orogeny and continental tectonics from geochemical perspectives (Part 2). (2018)
  • Author(s): Chung, S.L., Wu, F.Y., Liou, J.G., Isozaki, Y.
  • Journal Title: Journal of Asian Earth Sciences Volume: 167 Pages: 1-1
  • DOI: 10.1016/j.jseaes.2018.10.003
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Hirnantian (Late Ordovician) and end-Guadalupian (Middle Permian) mass extinction events compared (2018)
  • Author(s): Isozaki, Y., Servais, T.
  • Journal Title: Lethaia Volume: 51 Issue: 2 Pages: 173-186
  • DOI: 10.1111/let.12252
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Middle Permian (Capitanian) seawater 87Sr/86Sr minimum coincided with disappearance of tropical biota and reef collapse in NE Japan and Primorye (Far East Russia) (2018)
  • Author(s): Kani, T., Isozaki, Y., Hayashi, R., Zakharov, Y.D., Popov, A.
  • Journal Title: Palaeogeography Palaeoclimatology Palaeoecology Volume: 499 Pages: 13-21
  • DOI: 10.1016/j.palaeo.2018.03.033
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Detrital Zircon U–Pb Dating of Cretaceous Sandstones from Amakusa–Mifune District, Central Kyushu, Japan: Provenance and Transition of Fore-arc Clastic Rocks in Cretaceous Japan (2018)
  • Author(s): 堤 之恭、磯﨑 行雄、可児 智美、中畑 浩基
  • Journal Title: Journal of Geography (Chigaku Zasshi) Volume: 127 Issue: 1 Pages: 21-51
  • DOI: 10.5026/jgeography.127.21
  • NAID: 130006706061
  • ISSN: 0022-135X, 1884-0884
  • Peer Reviewed / Open Access
• [Journal Article] Greater South China extended to the Khanka block: detrital zircon geochronology of the middle-upper Paleozoic sandstones of the Sergeevka belt, Far East Russia (2017)
  • Author(s): Isozaki, Y., Nakahata, H., Zakharov,. Y., Popov, A., Sakata, S., Hirata, T.
  • Journal Title: Journal of Asian Earth Sciences Volume: 145 Pages: 565-575
  • DOI: 10.1016/j.jseaes.2017.06.027
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Asian orogeny and continental tectnics from geochemical perspectives (2017)
  • Author(s): Chung, S.L. Wu, F.Y., Liou, J.G., Isozai, Y.
  • Journal Title: Journal of Asian Earth Sciences Volume: 145 Pages: 297-297
  • DOI: 10.1016/j.jseaes.2017.08.015
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Seismic imaging of the Asian orogens and subduction zones (2017)
  • Author(s): Zhao Dapeng、Isozaki Yukio、Maruyama Shigenori
  • Journal Title: Journal of Asian Earth Sciences Volume: 145 Pages: 349-367
  • DOI: 10.1016/j.jseaes.2017.06.016
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The most continent-sided occurrence of the Phanerozoic subduction-related orogens in SW Japan: Zircon U-Pb dating of the Mizoguchi gneiss on the western foothill of Mt. Daisen volcano in Tottori. (2017)
  • Author(s): Tsutsumi, Y., Isozaki, Y., Terabayashi, M.
  • Journal Title: Jour. Asian Earth Sci. Volume: 145 Pages: 530-541
  • DOI: 10.1016/j.jseaes.2017.06.028
  • Peer Reviewed
• [Journal Article] Investigating the life and death of the Early Paleozoic Moyero geomagnetic superchron: Middle Ordovician paleomagnetism from Estonia (2017)
  • Author(s): Grappone, J.M., Chaffee, T., Isozaki, Y., Bauert, H., Kirschvink, J.L.
  • Journal Title: Palaeogeography Palaeoclimatology Palaeoecology Volume: 485 Pages: 673-686
  • DOI: 10.1016/j.palaeo.2017.07.024
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Centimeter-wide worm-like fossils from the lowest Cambrian of South China (2017)
  • Author(s): Zhang Xingliang、Liu Wei、Isozaki Yukio、Sato Tomohiko
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 1-11
  • DOI: 10.1038/s41598-017-15089-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evolution of the Forearc Crust of Paleozoic Japan: U–Pb Dating of Zircons from Mid-Paleozoic Granitoids and Sandstones of the Kurosegawa Belt in West-central Kochi Prefecture (2017)
  • Author(s): 長谷川 遼、安井 敏夫、堤 之恭、磯﨑 行雄
  • Journal Title: Journal of Geography (Chigaku Zasshi) Volume: 126 Issue: 5 Pages: 617-640
  • DOI: 10.5026/jgeography.126.617
  • NAID: 130006199341
  • ISSN: 0022-135X, 1884-0884
  • Open Access
• [Journal Article] High-reliability zircon separation for hunting the oldest material on Earth: an automatic zircon separator with image-processing/microtweezers-manipulating system and double-step dating. (2017)
  • Author(s): Isozaki, Y., Yamamoto, S., Sakata, S., Obayashi, H., Hirata, T., O-bori, K., Maebayashi, T., Takeshima, S., Ebisuzaki, T., Maruyama, S.
  • Journal Title: Geoscience Frontiers Volume: 印刷中
  • NAID: 120006630980
  • Peer Reviewed / Open Access
• [Journal Article] Secular change in lifetime of granitic crust and continental growth through time: a new view from detrital zircon age of sandstones (2017)
  • Author(s): Sawada, H., Isozaki, Y., Sakata, S., Hirata, T., Maruyama, S.
  • Journal Title: Geoscience Frontiers Volume: 印刷中 Issue: 4 Pages: 1099-1115
  • DOI: 10.1016/j.gsf.2016.11.010
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Neoproterozoic stratigraphy of the Zavkhan Terrane of Mongolia: The backbone for Cryogenian and Early Ediacaran chemostratigraphic records (2016)
  • Author(s): Bold, U., Smith, E.F., Rooney, A.D., Ramezani, J., Buchwaldt, R., Crowley, J.L., Schrag, D.P., Macdonald, F.A.
  • Journal Title: American Journal of Sciences Volume: 316 Issue: 1 Pages: 1-63
  • DOI: 10.2475/01.2016.01
  • Peer Reviewed
• [Journal Article] Palaeobiology of the early Ediacaran Shuurgat Formation, Zavkhan Terrane, southwestern Mongolia (2016)
  • Author(s): Anderson, R.P., McMahon, S., Bold, U., Macdonald, F.A., Briggs, D.E.G.
  • Journal Title: Journal of Systematic Paleontology Volume: 15 Pages: 1-22
  • Peer Reviewed
• [Journal Article] Paleomagnetism of the Teel basalts from the Zavkhan terrane: Implications for Paleozoic paleogeography in Mongolia and the growth of continental crust (2016)
  • Author(s): Kilian, T.M., Swanson-Hysell, N.L., Bold, U., Crowley, J., Macdonald, F.A.
  • Journal Title: Lithosphere Volume: - Issue: 6 Pages: 699-715
  • DOI: 10.1130/l552.1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Neoproterozoic to early Paleozoic tectonic evolution of the Zavkhan Terrane of Mongolia: implications for crustal growth in the Central Asian Orogenic Belt (2016)
  • Author(s): Bold, U., Crowley, J. L., Smith, E.F., Oyungerel, S., Macdonald, F. A.
  • Journal Title: Lithosphere Volume: - Issue: 6 Pages: 729-750
  • DOI: 10.1130/l549.1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three Distinct Shallow Marine Cretaceous Units in Western Shikoku and the U–Pb Age Spectra of Their Detrital Zircons: (2016)
  • Author(s): 中畑浩基・磯崎行雄・堤 之恭
  • Journal Title: Journal of Geography (Chigaku Zasshi) Volume: 125 Issue: 5 Pages: 717-745
  • DOI: 10.5026/jgeography.125.717
  • NAID: 130005281047
  • ISSN: 0022-135X, 1884-0884
  • Peer Reviewed / Open Access
• [Presentation] Precambrian to early Paleozoic Geology of the Central Asian Orogenic Belt (2019)
  • Author(s): Bold, U.
  • Organizer: International Workshop on Continental Amalgamation and Stabilization of Northeast Asia
  • Int'l Joint Research / Invited
• [Presentation] Nipponides vs. Altaids (2019)
  • Author(s): Isozkai, Y.
  • Organizer: International Workshop on Continental Amalgamation and Stabilization of Northeast Asia
  • Int'l Joint Research / Invited
• [Presentation] Greater South China: a new aspect in reconstructing paleogeography of proto-Asia (2018)
  • Author(s): Isozaki, Y.
  • Organizer: International conference on Asian orogeny and continental evolution
  • Int'l Joint Research / Invited
• [Presentation] Prevalence of ~800 Ma magmatism in the northern part of the Cenral Asian oroogenic belt. (2018)
  • Author(s): Bold, U., Isozkai, Y., Aoki, S.
  • Organizer: Japan Geoscience Union
  • Int'l Joint Research
• [Presentation] Phanerozoic Pacific-rim orogenic belt (Nipponides) and CAOB (Altaids) (2018)
  • Author(s): Isozaki, Y.
  • Organizer: Japan Geoscience Union
  • Int'l Joint Research / Invited
• [Presentation] 日本列島の形成史と古地理の変遷 (2018)
  • Author(s): 磯崎行雄
  • Organizer: 日本生態学会
  • Invited
• [Presentation] Greater South China: a new aspect in reconstructing paleogeography of proto-Asia (2017)
  • Author(s): Isozaki, Y.
  • Organizer: Intern. Conf. Asian Orogeny
  • Int'l Joint Research / Invited
• [Presentation] Decomposition of an arc-trench system: Cretaceous-Paleogene Japan case (2017)
  • Author(s): Isozaki, Y., Tsutsumi, Y., Hasegawa, R., Nakahata, H.
  • Organizer: Japan Geosci. Union Ann. Meet.
  • Int'l Joint Research
• [Presentation] THE HIRNANTIAN (LATE ORDOVICIAN) AND END-GUADALUPIAN (MIDDLE PERMIAN) MASS EXTINCTION EVENTS COMPARED (2017)
  • Author(s): Isozaki, Y., Servais, T.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] Proterozoic cratonic fragments in Mongolia: significance in the initiation of formation of the Central Asian orogenic belt (2017)
  • Author(s): Bold, U., Isozkai, Y., Macdonald, F.A.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] The oldest age limit of the Lomagundi-Jatuli event: zircon geochronology of the Paleoproterozoic Magondi Supergroup in Zimbabwe (2017)
  • Author(s): Sawada, H., Isozaki, Y., Sawaki, Y., Fujisaki, W., Sakata, S., Maruyma, S., Ueda, H., Saitoh, T., Sato, T.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] Stable and radiogenic strontium isotope (δ88Sr, 87Sr /86Sr) in seawater across Guadalupian-Lopingian boundary (Permian) (2017)
  • Author(s): Kani, T., Isozaki, Y., Misawa, K., Ishikawa, A., Yoneda, S.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] REEF COLLAPSE IN THE MID-CAPITANIAN NEAR THE NORTHERN CONNECTING CHANNEL BETWEEN THE TETHYS AND PANTHALASSA: LITHOSTRATIGRAPHY OF THE TOPMOST IWAIZAKI LIMESTONE (CAPITANIAN) IN NE JAPAN (2017)
  • Author(s): Tobita, T., Isozaki, Y.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] DO OCEANIC ISLANDS ACT AS REFUGIA DURING THE END-PERMIAN EXTINCTION? (2017)
  • Author(s): Godbold, A.L., Schoepfer, S., Henderson, C.M., Isozaki, Y.
  • Organizer: Geol. Soc. America Ann. Meet.
  • Int'l Joint Research
• [Presentation] The Kamura event revisted (2017)
  • Author(s): Isozaki, Y., Tobita, T., Tahata, T.
  • Organizer: Intern. Geol. Corr. Prog. 630 Ann. Meet.
  • Int'l Joint Research / Invited
• [Presentation] Sulfur isotope profile of carbonate-associated sulfate in Guadalupian-Lopingian paleo-atoll carbonates in Japan (2017)
  • Author(s): Maruoka, T., Isozaki, Y.
  • Organizer: Intern. Geol. Corr. Prog. 630 Ann. Meet.
  • Int'l Joint Research
• [Presentation] The Permian double extinctions: Stratigraphy at Chaotian, Sichuan, South China (2017)
  • Author(s): Saitoh, M., Isozaki, Y., Yao, J.X., Ji, Z.S.
  • Organizer: Intern. Geol. Corr. Prog. 630 Ann. Meet.
  • Int'l Joint Research
• [Presentation] Co-evolution of Proterozoic cratonic fragments in western and northern Mongolia (2017)
  • Author(s): Bold, U., Isozaki, Y., Macdonald, F.A.
  • Organizer: 2nd China-RussiaMeet. Central Asian orogenic belt
  • Int'l Joint Research
• [Presentation] Proterozoic cratonic fragments in western and northern Mongolia: importance in the onset of formation of the Central Asian orogenic belt (2017)
  • Author(s): Bold, U., Macdonald, F.A., Isozaki, Y.
  • Organizer: Japan Geosci. Union Ann. Meet.
  • Int'l Joint Research
• [Book] 図説 地学の話 (2019)
  • Author(s): 高橋正樹・栗田 敬・鵜川元雄・加藤央之・磯崎行雄
  • Total Pages: 126
  • Publisher: 日本文芸社
  • ISBN: 9784537216783
• [Book] Astrobiology (2019)
  • Author(s): Isozaki, Y. in Yamagishi, A. et al.(eds)
  • Total Pages: 465
  • Publisher: Springer
  • ISBN: 9789811336386
• [Book] Astrobiology (2018)
  • Author(s): Isozaki, Y.
  • Publisher: Springer