Chronostratigraphy for the Mesoproterozoic strata in Jixian, North China

• Project/Area Number: 26800259
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geology
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Sawaki Yusuke 東京工業大学, 理学院, 助教 (00635063)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 中期原生代 / ジルコン / 北中国蘇県 / LA-MC-ICP-MS / 炭酸塩岩

Outline of Final Research Achievements

In the eastern North China Craton (NCC), basement gneisses are covered by poorly dated Proterozoic sediments. This study reports new zircon data from the Jixian area to constrain the protolith age of basement gneisses, the detrital ages of cover clastic sediments, and the age of a post-tectonic intrusive granite. The cores in zircons have 207Pb/206Pb peak ages at 2520 Ma that constrain the minimum protolith age of the gneiss, whereas the rims have a wide 207Pb/206Pb age range from ca. 2500 Ma to 1800 Ma. This reflects a Paleoproterozoic overprint on the basement of the NCC.
Overlying clastic sediments mainly contain 2.5-2.7 Ga zircons derived from the basement rocks. 2200 Ma detrital zircons were no doubt derived from 2200 Ma igneous rocks, probably from the southern NCC. The intrusive granite contains euhedral zircon grains with clear oscillatory zones that yield a Concordia age of 205.6 ± 1.1 Ma, and was likely generated during early Mesozoic delamination of the eastern NCC.

Research Products

• [Int'l Joint Research] 中国地質科学院(中国)
• [Int'l Joint Research] Northern Territory Geological Survey(オーストラリア)
• [Int'l Joint Research] Chinese Academy of Geological Sciences(中国)
• [Journal Article] New chronological constraints on Neoarchean gneisses, Proterozoic cover sediments, and Triassic granite, Jixian, China (2016)
  • Author(s): Sawaki, Y., Li, Y., Asanuma, H., Sakata, S., Suzuki, K., Hirata, T., Windley, B. F.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 459 Pages: 182-197
  • DOI: 10.1016/j.palaeo.2016.07.008
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A high-resolution chemostratigraphy of post-Marinoan Cap Carbonate using drill core samples in the Three Gorges area, South China (2016)
  • Author(s): Sato, H., Tahata, M., Sawaki, Y., Maruyama, S., Yoshida, N., Shu, D., Han, J., Li, Y., Komiya, T.
  • Journal Title: Geoscience Frontiers Volume: in press Issue: 4 Pages: 663-671
  • DOI: 10.1016/j.gsf.2015.07.008
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tracking the redox history and nitrogen cycle in the pelagic Panthalassic deep ocean in the Middle Triassic to Early Jurassic: Insights from redox-sensitive elements and nitrogen isotopes (2016)
  • Author(s): Fujisaki, W., Sawaki, Y., Yamamoto, S., Sato, T., Nishizawa, M., Windley, B.F., Maruyama, S.
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 449 Pages: 397-420
  • DOI: 10.1016/j.palaeo.2016.01.039
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Occurrence and geochronology of the Eoarchean, ~3.9 Ga, Iqaluk Gneiss in the Saglek Block, northern Labrador, Canada: Evidence for the oldest supracrustal rocks in the world (2016)
  • Author(s): Shimojo, M., Yamamoto, S., Sakata, S., Maki, K., Sawaki, Y., Ishikawa, A., Aoki, K., Okada, Y., Aoki, S., Koshida, K., Hirata, T., Collerson, K. D., Komiya, T.
  • Journal Title: Precambrian Research Volume: 278 Pages: 218-243
  • DOI: 10.1016/j.precamres.2016.03.018
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reactions between komatiite and CO2-rich seawater at 250 °C and 350 °C, 500 bars: Implications for hydrogen generation in the Hadean seafloor hydrothermal system (2016)
  • Author(s): Ueda, H., Shibuya, T., Sawaki, Y., Saitoh, M., Takai, K., Maruyama, S.
  • Journal Title: Progress on Earth and Planetary Sciences Volume: 3(35) Issue: 1 Pages: 1-14
  • DOI: 10.1186/s40645-016-0111-8
  • Peer Reviewed / Open Access
• [Journal Article] Three-step modernization of the ocean: Modeling of carbon cycles and the revolution of ecological systems in the Ediacaran/Cambrian periods. (2015)
  • Author(s): Tahata, M., Y. Sawaki, Ueno, Y., Nishizawa, M., Yoshida, N., Ebisuzaki, T., Komiya, T., Maruyama, S.
  • Journal Title: Geoscience Frontiers Volume: 6 Issue: 1 Pages: 121-136
  • DOI: 10.1016/j.gsf.2014.05.005
  • Peer Reviewed / Open Access
• [Journal Article] Rock magnetism of tiny exsolved magnetite in plagioclase from a Paleoarchean granitoid in the Pilbara craton (2015)
  • Author(s): Yoichi Usui, Takazo Shibuya, Yusuke Sawaki, Tsuyoshi Komiya
  • Journal Title: Geochem. Geophys. Geosyst. Volume: 16 Issue: 1 Pages: 112-125
  • DOI: 10.1002/2014gc005508
  • Peer Reviewed
• [Journal Article] Constraints for the causes of mass extinction at the Triassic-Jurassic boundary based on high precision platinum group element analyses (2015)
  • Author(s): Fujisaki, W., Sawaki, Y., Yokoyama, T., Yamamoto, S., Maruyama, S.
  • Journal Title: 分析化学 Volume: 64(5) Pages: 341-348
  • NAID: 130005075455
  • Peer Reviewed
• [Journal Article] In-situ iron isotope analysis of pyrites in ~3.7 Ga sedimentary protoliths (2015)
  • Author(s): Yoshiya, K., Sawaki, Y., Hirata, T., Maruyama, S., Komiya, T.,
  • Journal Title: Chemical Geology Volume: 401 Pages: 126-139
  • DOI: 10.1016/j.chemgeo.2015.02.022
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The Marine Environments encompassing the Neoproterozoic glaciations: evidence from C, Sr and Fe isotope ratios in the Hecla Hoek Supergroup in Svalbard. (2015)
  • Author(s): Tahata, M., Sawaki, Y., Yoshiya, K., Nishizawa, M., Komiya, T., Hirata, T., Yoshida, N., Maruyama, S., Windley, B. F.
  • Journal Title: Precambrian Research Volume: 263 Pages: 19-42
  • DOI: 10.1016/j.precamres.2015.03.007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] In-situ iron isotope analyses of pyrites from 3.5 to 3.2 Ga sedimentary rocks of the Barberton Greenstone Belt, Kaapvaal Craton (2015)
  • Author(s): Yoshiya, K., Sawaki, Y., Shibuya, Yamamoto, S., Komiya, T., Hirata, T., Maruyama, S.
  • Journal Title: Chemical Geology Volume: 403 Pages: 58-73
  • DOI: 10.1016/j.chemgeo.2015.03.007
  • NAID: 130004596433
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Uranium and molybdenum isotope evidence for an episode of widespread ocean oxygenation during the late Ediacaran Period (2015)
  • Author(s): Kendall, B., Komiya, T., Lyons, T. W., Bates, S. M., Gordon, G. W., Romaniello, S. J., Jiang, G., Creaser, R. A., Xiao, S., McFadden, K., Sawaki, Y., Tahata, M., Shu, D., Han, J., Li, Y., Chu, X., Anbar, A. D.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 156 Pages: 173-193
  • DOI: 10.1016/j.gca.2015.02.025
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ordovician ocean plate stratigraphy and thrust duplexes of the Ballantrae Complex, SW Scotland: Implications for the pelagic deposition rate and forearc accretion in the closing Iapetus Ocean (2015)
  • Author(s): Fujisaki, W., Asanuma, H., Suzuki, K., Sawaki, Y., Sakata, S., Hirata, T., Maruyama, S., Windley, B. F.
  • Journal Title: Tectonophysics Volume: 662 Pages: 312-327
  • DOI: 10.1016/j.tecto.2015.04.014
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reconstruction of ocean plate stratigraphy in the Gwna Group, NW Wales: Implications for the subduction-accretion process of a latest Proterozoic trench-forearc (2015)
  • Author(s): Asanuma, H., Okada, Y., Fujisaki, W., Suzuki, K., Sato, T., Sawaki, Y., Sakata, S., Yamamoto, S., Hirata, T., Maruyama, S., Windley, B. F.
  • Journal Title: Tectonophysics Volume: 662 Pages: 195-207
  • DOI: 10.1016/j.tecto.2015.04.016
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ancient oceanic crust in island arc lower crust: evidence from oxygen isotopes in zircons from the Tanzawa Tonalitic Pluton (2015)
  • Author(s): Suzuki, K., Kitajima, K., Sawaki, Y., Hattori, K., Hirata, T., Maruyama, S.
  • Journal Title: Lithos Volume: 228-229 Pages: 43-54
  • DOI: 10.1016/j.lithos.2015.04.005
  • NAID: 130005476304
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Geology of the Eoarchean, >3.95 Ga, Nulliak supracrustal rocks in the Saglek Block, northern Labrador, Canada: The oldest geological evidence for plate tectonics (2015)
  • Author(s): Komiya, T., Yamamoto, S., Aoki, S., Sawaki, Y., Ishikawa, A., Tashiro, T., Koshida, K., Shimojo, M., Aoki, K., Collerson, K.
  • Journal Title: Tectonophysics Volume: 662 Pages: 40-66
  • DOI: 10.1016/j.tecto.2015.05.003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Redox condition of the late Neoproterozoic pelagic deep ocean: 57Fe Mössbauer analyses of pelagic mudstones in the Ediacaran accretionary complex, Wales, UK (2015)
  • Author(s): Sato, T., Sawaki, Y., Asanuma, H., Fujisaki, W., Okada, Y., Maruyama, S., Isozaki, Y., Shozugawa, K., Matsuo, M., Windley, B. F.
  • Journal Title: Tectonophysics Volume: 662 Pages: 472-480
  • DOI: 10.1016/j.tecto.2015.08.002
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Geochemistry of accreted metavolcanic rocks from the Neoproterozoic Gwna Group of Anglesey-Lleyn, NW Wales, U.K: MORB and OIB in the Iapetus Ocean (2015)
  • Author(s): Saito, T., Uno, M., Sato, T., Fujisaki, W., Haraguchi, S., Li, Y., Sawaki, Y., Yamamoto, S., Maruyama, S.
  • Journal Title: Tectonophysics Volume: 662 Pages: 243-255
  • DOI: 10.1016/j.tecto.2015.08.015
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The anomalous Ca cycle in the Ediacaran ocean: evidence from Ca isotopes preserved in carbonates in the Three Gorges area, South China (2014)
  • Author(s): Y. Sawaki, M. Tahata, T. Ohno, T. Komiya, T. Hirata, S. Maruyama, J. Han, D. Shu
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 1070-1089
  • DOI: 10.1016/j.gr.2013.03.008
  • Peer Reviewed
• [Journal Article] The Cambrian Explosion: Plume-driven birth of the second ecosystem on Earth (2014)
  • Author(s): Santosh, M., Maruyama, S., Sawaki, Y., Meert, J. G.
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 945-965
  • DOI: 10.1016/j.gr.2013.03.013
  • Peer Reviewed
• [Journal Article] New chronological constraints for Cryogenian to Cambrian rocks in the Three Gorges, Weng’an and Chengjiang areas, South China (2014)
  • Author(s): Okada, Y., Sawaki, Y., Komiya, T., Hirata, T., Takahata, N., Sano, Y., Han, J., Maruyama, S.
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 1027-1044
  • DOI: 10.1016/j.gr.2013.05.001
  • Peer Reviewed
• [Journal Article] Nitrogen isotope chemostratigraphy of the Ediacaran and Early Cambrian platform sequence at Three Gorges, South China (2014)
  • Author(s): Kikumoto, R., Tahata, M., Nishizawa, M., Sawaki, Y., Maruyama, S., Komiya, T., Takai, K., Ueno, Y.
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 1057-1069
  • DOI: 10.1016/j.gr.2013.06.002
  • Peer Reviewed
• [Journal Article] In-situ analyses of phosphorus contents of carbonate minerals: Reconstruction of phosphorus contents of seawater from the Ediacaran to early Cambrian (2014)
  • Author(s): Shimura, T., Kon, Y., Sawaki, Y., Hirata, T., Han, J., Shu, D., Komiya, K.
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 1090-1107
  • DOI: 10.1016/j.gr.2013.08.001
  • Peer Reviewed
• [Journal Article] Zircon U-Pb dating from the mafic enclaves in the Tanzawa Tonalitic Pluton, Japan: Implications for arc history and formation age of the lower-crust (2014)
  • Author(s): Suzuki, K., Yamamoto, S., Sawaki, Y., Aoki, K., Omori, S., Kon, Y., Hirata, T., Li, Y., Takaya, Y., Fujinaga, K., Kato, Y., Maruyama, S.
  • Journal Title: Lithos Volume: 196-197 Pages: 301-320
  • DOI: 10.1016/j.lithos.2014.02.010
  • Peer Reviewed / Open Access
• [Journal Article] Accreted Kula plate fragment at 94 Ma in the Yokonami-melange, Shimanto-belt, Shikoku, Japan (2014)
  • Author(s): Saito, T., Okada, Y., Fujisaki, W., Sawaki, Y., Sakata, S., Dohm, J., Maruyama, S., Hirata, T.
  • Journal Title: Tectonophysics Volume: 623 Pages: 136-146
  • DOI: 10.1016/j.tecto.2014.03.026
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Initiation of leaking Earth: An ultimate trigger of the Cambrian explosion (2013)
  • Author(s): Maruyama, S., Sawaki, Y., Ebisuzaki, T., Ikoma, M., Omori, S., Komabayashi, T.
  • Journal Title: Gondwana Research Volume: 25 Issue: 3 Pages: 910-944
  • DOI: 10.1016/j.gr.2013.03.012
  • Peer Reviewed
• [Presentation] Chronological constraints on Paleoproterozoic strata in Gabonese Republic (2016)
  • Author(s): 澤木佑介、佐藤友彦、浅沼尚、坂田周平、平田岳史
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Radiogenic Sr isotope excursions in the Ediacaran seawater (2016)
  • Author(s): 澤木佑介
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] U-Pb dating of zircon grains from the North Pole Adamellite in the eastern Pilbara Craton (2016)
  • Author(s): 浅沼尚、坂田周平、澤木佑介、鈴木和恵、平田岳史、丸山茂徳
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Osmium isotope excursion in the central Panthalassa during the Toarcian Oceanic Anoxic Event: Relationships between Karoo-Ferrar volcanism and climatic-biologic changes (2016)
  • Author(s): 藤崎渉、澤木佑介、上田修裕、須田好、佐藤友彦、西澤学、横山哲也
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Trace element composition in zircons from A-type granitoids in the Cape Ashizuri, SW Japan: Implications for new source rock index using zircon (2016)
  • Author(s): 鈴木和恵、澤木佑介、浅沼尚、服部健太郎、平田岳史
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Tectonic setting of the Paleoproterozoic (2.1 Ga) sedimentary basins in southeasten Gabon: A possible evolutionary hotspot of the early macrobiota (2016)
  • Author(s): 佐藤友彦、澤木佑介、丸山茂徳
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Ediacaran sulfur cycling reconstructed from an isotopic analysis of carbonate associated sulfate in Doushantuo Formation (2016)
  • Author(s): 松浦史宏、斎藤誠史、澤木佑介、上野雄一郎
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Organic Nitrogen/Carbon isotope ratios from the Middle Proterozoic sedimentary rocks, McArthur Basin, Northern Australia (2016)
  • Author(s): 吉屋一美、澤木佑介、西澤学、小宮剛、丸山茂徳
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Experimental study on H2 generation through reactions between komatiite and CO2-rich seawater (2016)
  • Author(s): 上田修裕、渋谷岳造、澤木佑介、斎藤誠史、高井研、丸山茂徳
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ(千葉)
• [Presentation] Secular variation in 87Sr/86Sr ratio of seawater in the Ediacaran (2016)
  • Author(s): Sawaki, Y., Ohno, T., Komiya, T.
  • Organizer: Goldschmidt 2016 Conference
  • Place of Presentation: パシフィコ横浜(神奈川)
  • Int'l Joint Research
• [Presentation] Hf-O isotope signature for zircons in the Taitao Granite: geochemical constraints on slab-melting (2016)
  • Author(s): Suzuki, K., Iizuka, T., Kitajima, K., Valley, J. W., Sawaki, Y., Hattori, K., Hirata, T., Anma, R.
  • Organizer: Goldschmidt 2016 Conference
  • Place of Presentation: パシフィコ横浜(神奈川)
  • Int'l Joint Research
• [Presentation] Experimental study on H2 generation by reactions between komatiite and CO2-rich seawater (2016)
  • Author(s): Ueda, H., Shibuya, T., Sawaki, Y., Saitoh, M., Takai, K., Maruyama, S.
  • Organizer: Goldschmidt 2016 Conference
  • Place of Presentation: パシフィコ横浜(神奈川)
  • Int'l Joint Research
• [Presentation] カンブリア爆発 (2016)
  • Author(s): 佐藤友彦、澤木佑介
  • Organizer: 日本進化学会年大会 第18回東京大会
  • Place of Presentation: 東京工業大学（東京）
  • Invited
• [Presentation] Paleoproterozoic organic carbon and nitrogen isotopic stratigraphy in the Francevillian Basins, Gabon: Anaerobic condition after the appearance of macrofossils (2016)
  • Author(s): 佐藤友彦、澤木佑介、丸山茂徳、斎藤誠史、松井洋平
  • Organizer: 日本地質学会第123年学術大会
  • Place of Presentation: 日本大学(東京)
• [Presentation] Reconstruction of paleoceanographic environments in the Anisian (Middle Triassic) (2016)
  • Author(s): 藤崎渉、浅沼尚、須田好、鈴木和恵、吉屋一美、佐藤友彦、澤木佑介、松井洋平、横山哲也
  • Organizer: 日本地質学会第123年学術大会
  • Place of Presentation: 日本大学(東京)
• [Presentation] Geochronological constraints of the Paleoarchean Shurugwi Greenstone Belt in the Zimbabwe craton (2016)
  • Author(s): Sawada, H., Sawaki, Y., Sato, T., Saito, T., Fujisaki, W., Ueda, H., Maruyama, S., Isozaki, Y., Sakata, S.
  • Organizer: GSA Annual Meeting
  • Place of Presentation: デンバー(アメリカ)
  • Int'l Joint Research
• [Presentation] Nitrogen/Carbon isotope ratios from the early to middle Proterozoic sedimentary rocks, McArthur basin, northern Australia (2016)
  • Author(s): Yoshiya, K., Sawaki, Y., Nishizawa, M., Matsui, Y., Komiya, T., Maruyama, S.
  • Organizer: GSA Annual Meeting
  • Place of Presentation: デンバー(アメリカ)
  • Int'l Joint Research
• [Presentation] Rock magnetism and paleomagnetism of tiny exsolved magnetite in plagioclase from a Paleoarchean granitoid in the Pilbara craton (2015)
  • Author(s): Usui, Y., Shibuya, T., Sawaki, Y., Komiya, T., Tani, T., Nishizawa, M., Saitoh, M., Kashiwabara, T.
  • Organizer: 地球電磁気学会
  • Place of Presentation: 東京大学
  • Year and Date: 2015-10-31
• [Presentation] Deciphering surface environments during the Ediacaran (2015)
  • Author(s): 澤木 佑介
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] Secular change of seawater salinity through Earth history (2015)
  • Author(s): 齋藤拓也、渋谷岳造、澤木佑介、小宮剛、丸山茂徳
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] Reinterpretation of geotectonic history of Wales-England area based on Pacific-type orogeny (2015)
  • Author(s): 浅沼尚、岡田吉弘、澤木佑介、山本伸次、丸山茂徳
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] Paleoproterozoic Research: Oxygenation and the appearance of Gabon multicellular biota (2015)
  • Author(s): 佐藤友彦、澤木佑介、丸山茂徳
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] タイタオ花崗岩中のジルコンHf-O同位体組成から推定するスラブメルティング時の溶融物質 (2015)
  • Author(s): 鈴木和恵、飯塚毅、北島宏輝、Valley John W.、澤木佑介、服部健太郎、平田岳史、丸山茂徳
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] 高CO2濃度下におけるコマチアイト熱水変質実験による水素発生 (2015)
  • Author(s): 上田修裕、澤木佑介、斎藤誠史、渋谷岳造、丸山茂徳
  • Organizer: 日本地質学会第122年学術大会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-11
• [Presentation] Oxygen Isotope Ratio of Zircons from the Taitao Granite: Implications for Slab-Melting (2015)
  • Author(s): Suzuki, K., Kitajima, K., Valley, J. W., Sawaki, Y., Hattori, K., Hirata, T., Maruyama, S.
  • Organizer: Goldschmidt 2015 Conference
  • Place of Presentation: プラハ
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] In situ Iron Isotope Analysis of Pyrite and Carbon/Nitrogen Isotope Ratios from the Middle Proterozoic Sediments, McArthur Basin, Northern Australia (2015)
  • Author(s): Yoshiya, K., Sawaki, Y., Nishizawa, M., Komiya, T., Hirata, T., Maruyama, S.
  • Organizer: Goldschmidt 2015 Conference
  • Place of Presentation: プラハ
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] Lithostratigraphy of mesoproterozoic stratum at Jixian, north China (2015)
  • Author(s): 澤木 佑介、浅沼 尚
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Euxinic conditions at Three Gorges area as opposed to global oxidation event, around PC/C boundary (2015)
  • Author(s): 澤木 佑介
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Two regional metamorphic belts in assemblages of subduction-related orogens in Wales-England, U.K. (2015)
  • Author(s): 浅沼 尚、板谷 徹丸、藤崎 渉、佐藤 友彦、澤木 佑介、丸山 茂徳
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Secular change of seawater salinity through Earth history (2015)
  • Author(s): 齋藤 拓也、渋谷 岳造、澤木 佑介、小宮 剛、丸山 茂徳
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Experimental hydrothermal alteration of komatiite under CO2-rich condition at 250 Celsius degrees and 500 bars (2015)
  • Author(s): 上田 修裕、澤木 佑介、渋谷 岳造、丸山 茂徳
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] In-situ iron isotope analysis of pyrite and organic carbon/nitrogen isotope ratios from the Middle Proterozoic sediments (2015)
  • Author(s): 吉屋 一美、澤木 佑介、西澤 学、小宮 剛、平田 岳史、丸山 茂徳
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] In-situ iron isotope analysis of pyrites in ~ 3.7 Ga sedimentary protoliths from the Isua supracrustal belt (2015)
  • Author(s): 吉屋 一美、澤木 佑介、平田 岳史、丸山 茂徳、小宮 剛
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Establishment of new index of sediment input into granitic magma using trace element composition in zircon (2015)
  • Author(s): 鈴木和恵、澤木 佑介、服部 健太郎、平田 岳史、新井 宏嘉、大森 聡一、丸山 茂徳
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] Osmium isotope composition in the deep pelagic Panthalassa ocean during the Toarcian Oceanic Anoxic Event (2015)
  • Author(s): 藤崎渉、上田 修裕、須田 好、佐藤 友彦、澤木 佑介、横山 哲也
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ(千葉)
  • Year and Date: 2015-05-24
• [Presentation] The stepwise increase of continental weathering in the Ediacaran and early Cambrian: evidenced from radiogenic Sr isotope excursion in the strata at Three Gorges, South China. (2014)
  • Author(s): Yusuke Sawaki, Shigenori Maruyama
  • Organizer: AGU Fall Meeting
  • Place of Presentation: サンフランシスコ
  • Year and Date: 2014-12-19
• [Presentation] Signatures of Pacific-type orogeny in Llyne and Anglesey, northwest Wales (2014)
  • Author(s): Hisashi Asanuma, Yoshihiro Okada, Yusuke Sawaki, Shinji Yamamoto, Takafumi Hirata, Shigenori Maruyama
  • Organizer: AGU Fall Meeting
  • Place of Presentation: サンフランシスコ
  • Year and Date: 2014-12-19
• [Presentation] Ancient oceanic crust in island arc lower crust: evidence from oxygen isotopes in zircons from the Tanzawa Tonalitic Pluton. (2014)
  • Author(s): Kazue Suzuki, Kouki Kitajima, John W. Valley, Yusuke Sawaki, Kentaro Hattori, Takafumi Hirata,Shigenori Maruyama
  • Organizer: Geological Society of America Annual Meeting
  • Place of Presentation: バンクーバー
  • Year and Date: 2014-10-20
• [Presentation] In-situ iron isotope analysis of pyrite and organic carbon/nitrogen isotope ratios in the Middle Proterozoic sediments from McArthur Basin, Northern Australia (2014)
  • Author(s): Kazumi Yoshiya, Yusuke Sawaki, Manabu Nishizawa, Tsuyoshi Komiya, Takafumi Hirata, Shigenori Maruyama
  • Organizer: Geological Society of America Annual Meeting
  • Place of Presentation: バンクーバー
  • Year and Date: 2014-10-20
• [Presentation] The radiogenic Sr isotope excursion during the Ediacaran and early Cambrian (2014)
  • Author(s): Yusuke Sawaki, Shigenori Maruyama, Tomohiko Sato
  • Organizer: Geological Society of America Annual Meeting
  • Place of Presentation: バンクーバー
  • Year and Date: 2014-10-19
• [Presentation] ウェールズ北西部に露出する付加体の堆積年代の制約とその後背地推定 (2014)
  • Author(s): 澤木佑介、浅沼尚、鈴木和恵、岡田吉弘、丸山茂徳
  • Organizer: 日本地質学会第121年学術大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2014-09-15
  • Invited
• [Presentation] 原始地球環境下での低温アンモニア合成 (2014)
  • Author(s): 澤木佑介、丸山茂徳
  • Organizer: 日本進化学会年大会 第１６回大阪大会
  • Place of Presentation: 高槻現代劇場（大阪）
  • Year and Date: 2014-08-23
• [Presentation] エディアカラ紀に起きた生命の大型化とそれを引き起こした環境変動 (2014)
  • Author(s): 澤木佑介、丸山茂徳
  • Organizer: 日本進化学会年大会 第１６回大阪大会
  • Place of Presentation: 高槻現代劇場（大阪）
  • Year and Date: 2014-08-21
• [Presentation] Ancient ocean environment in the Ediacaran to Cambrian. (2014)
  • Author(s): 澤木佑介、丸山茂徳
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-28
• [Remarks] 澤木佑介のホームページ
  • URL: https://y-sawaki.jimdo.com/
• [Remarks] 東京工業大学リサーチリポジトリ
  • URL: http://t2r2.star.titech.ac.jp/cgi-bin/researcherpublicationlist.cgi?q_researcher_content_number=CTT100511199&q_year_from=2016&q_year_to=2016&tab_yf=2017
• [Remarks] Ｔ２Ｒ２ 東京工業大学リサーチリポジトリ
  • URL: http://t2r2.star.titech.ac.jp/cgi-bin/researcherinfo.cgi?q_researcher_content_number=CTT100511199
• [Remarks] 丸山研究室ホームページ
  • URL: http://www.geo.titech.ac.jp/lab/maruyama/maruyamalab/member12/sawaki.html