Constraints on Cu and Zn concentrations in Paleoproterozoic seawater.

• Project/Area Number: 17H04858
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: Sawaki Yusuke 東京大学, 大学院総合文化研究科, 助教 (00635063)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥21,970,000 (Direct Cost: ¥16,900,000、Indirect Cost: ¥5,070,000); Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2018: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000); Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 前期原生代 / 掘削試料 / 銅同位体比 / 亜鉛同位体比 / 真核生物 / 原生代前期 / ガボン / 陸上掘削 / ガボン共和国

Outline of Final Research Achievements

Trace element concentration in seawater is a crucial component in regulating marine biological productivity. Purpose of this study is elucidating surface environmental changes, especially focusing on marine Zn concentration, during the Paleoproterozoic. We conducted on-land drilling to collect fresh sedimentary rocks in Gabonese Republic, where Paleoproterozoic strata well crop out. As a consequence of analyses, we obtained new understandings as follows. (1) Appearance of eukaryote-like fossils dates back to approximately 2.2 Ga. (2) Oxic conditions locally existed in paleo-ocean in the Gabonese Republic. (3) Eukaryotes require more Zn than prokaryotes. Marine Zn concentration was elevated in association with the Great Oxidation Event during the Paleoproterozoic.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果により、まずは真核生物の出現時期が従来考えられていたよりも１億年古く、２２億年前まで遡る事が新たに明らかになった。また、前期原生代に大気海洋が酸化的になった事により、海洋中の亜鉛が溶存態として存在できるようになったはずである。本研究による分析結果は海水亜鉛濃度が増加した事を示している。前期原生代の地層から真核生物化石が見つかるようになるのは、海水亜鉛が上昇し、亜鉛を多量に必要とする真核生物の個体数が増加したからであると考える事ができる。

Research Products

• [Int'l Joint Research] マスク工科大学(ガボン)
• [Int'l Joint Research] マスク工科大学(ガボン)
• [Int'l Joint Research] ネルソンマンデラ大学(南アフリカ)
• [Int'l Joint Research] マスク工科大学(ガボン)
• [Journal Article] Geology around Natural Reactors and Birthplace of Eukaryotes (2019)
  • Author(s): SAWAKI Yusuke、SATO Tomohiko、FUJISAKI Wataru、UEDA Hisahiro、ASANUMA Hisashi、MARUYAMA Shigenori
  • Journal Title: Journal of Geography (Chigaku Zasshi) Volume: 128 Issue: 4 Pages: 549-569
  • DOI: 10.5026/jgeography.128.549
  • NAID: 130007709678
  • ISSN: 0022-135X, 1884-0884
  • Year and Date: 2019-08-25
  • Peer Reviewed
• [Journal Article] Serpentinite-hosted Hydrothermal System on the Early Earth (2019)
  • Author(s): UEDA Hisahiro、SAWAKI Yusuke
  • Journal Title: Journal of Geography (Chigaku Zasshi) Volume: 128 Issue: 4 Pages: 491-511
  • DOI: 10.5026/jgeography.128.491
  • NAID: 130007709675
  • ISSN: 0022-135X, 1884-0884
  • Year and Date: 2019-08-25
  • Peer Reviewed
• [Journal Article] Redox condition and nitrogen cycle in the Permian deep mid-ocean: A possible contrast between Panthalassa and Tethys (2019)
  • Author(s): Fujisaki Wataru、Sawaki Yusuke、Matsui Yohei、Yamamoto Shinji、Isozaki Yukio、Maruyama Shigenori
  • Journal Title: Global and Planetary Change Volume: 172 Pages: 179-199
  • DOI: 10.1016/j.gloplacha.2018.09.015
  • NAID: 130007690869
  • Peer Reviewed
• [Journal Article] An integrated chemostratigraphic (δ13C-δ18O-87Sr/86Sr-δ15N) study of the Doushantuo Formation in western Hubei Province, South China (2019)
  • Author(s): Lan Zhongwu、Sano Yuji、Yahagi Takuya、Tanaka Kentaro、Shirai Kotaro、Papineau Dominic、Sawaki Yusuke、Ohno Takeshi、Abe Mariko、Yang Hongwei、Liu Hai、Jiang Tao、Wang Teng
  • Journal Title: Precambrian Research Volume: 320 Pages: 232-252
  • DOI: 10.1016/j.precamres.2018.10.018
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Late Jurassic igneous zircons from the Mikabu greenstones in SW Japan: the (2019)
  • Author(s): Sawada, H., Isozaki, Y., Hasegawa, R., Aoki, S., Sawaki, Y., Nakamura, Y.
  • Journal Title: Journal of Asian Earth Sciences Volume: 169 Pages: 228-236
  • DOI: 10.1016/j.jseaes.2018.08.018
  • Peer Reviewed
• [Journal Article] Nine requirements for the origin of Earth's life: Not at the hydrothermal vent, but in a nuclear geyser system (2019)
  • Author(s): Maruyama Shigenori、Kurokawa Ken、Ebisuzaki Toshikazu、Sawaki Yusuke、Suda Konomi、Santosh M.
  • Journal Title: Geoscience Frontiers Volume: 10 Issue: 4 Pages: 1337-1357
  • DOI: 10.1016/j.gsf.2018.09.011
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Zircon geochronology of the Paleoproterozoic Magondi Supergroup in Zimbabwe: Age constraints to the Lomagundi-Jatuli event. (2019)
  • Author(s): Sawada, H., Mugandani, E., Sato, T., Sawaki, Y., Sakata, S., Isozaki, Y., Maruyama, S.
  • Journal Title: Terra Nova Volume: 31 Issue: 5 Pages: 438-444
  • DOI: 10.1111/ter.12407
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Precambrian basement, provenance implication, and tectonic evolution of the Gargan block of the Tuva-Mongolia Zone, Central Asian Orogenic Belt (2019)
  • Author(s): Bold, U., Y. Isozaki, S. Aoki, S. Sakata, A. Ishikawa, Y. Sawaki, H. Sawada
  • Journal Title: Gondwana Research Volume: 75 Pages: 172-183
  • DOI: 10.1016/j.gr.2019.05.003
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Shift in limiting nutrients in the late Ediacaran-early Cambrian marine systems of South China (2019)
  • Author(s): Nishizawa Manabu、Tsuchiya Yuki、Du Wei、Sawaki Yusuke、Matsui Yohei、Wang Yue、Han Jian、Komiya Tsuyoshi
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 530 Pages: 281-299
  • DOI: 10.1016/j.palaeo.2019.05.036
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Redox history of the Three Gorges region during the Ediacaran and Early Cambrian as indicated by the Fe isotope (2018)
  • Author(s): Sawaki Yusuke、Tahata Miyuki、Komiya Tsuyoshi、Hirata Takafumi、Han Jian、Shu Degan
  • Journal Title: Geoscience Frontiers Volume: 9 Issue: 1 Pages: 155-172
  • DOI: 10.1016/j.gsf.2017.02.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] U-Pb zircon geochronology of the North Pole Dome adamellite in the eastern Pilbara Craton (2018)
  • Author(s): Asanuma Hisashi、Sawaki Yusuke、Sakata Shuhei、Obayashi Hideyuki、Suzuki Kazue、Kitajima Kouki、Hirata Takafumi、Maruyama Shigenori
  • Journal Title: Island Arc Volume: 印刷中 Issue: 4 Pages: 12248-12248
  • DOI: 10.1111/iar.12248
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraints on the P-T conditions of high-pressure metamorphic rocks from the Inyoni shear zone in the mid-Archean Barberton Greenstone Belt, South Africa (2018)
  • Author(s): Kato, D., Aoki, K., Komiya, T., Yamamoto, S., Sawaki, Y., Asanuma, H., Sato, T., Tsuchiya, Y., Shozugawa, K., Matsuo, M., & Windley, B. F.
  • Journal Title: Precambrian Research Volume: 315 Pages: 1-18
  • DOI: 10.1016/j.precamres.2018.06.018
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Global perturbations of carbon cycle during the Triassic-Jurassic transition recorded in the mid-Panthalassa (2018)
  • Author(s): Fujisaki Wataru、Matsui Yohei、Asanuma Hisashi、Sawaki Yusuke、Suzuki Katsuhiko、Maruyama Shigenori
  • Journal Title: Earth and Planetary Science Letters Volume: 500 Pages: 105-116
  • DOI: 10.1016/j.epsl.2018.07.026
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Tonian-Cryogenian boundary sections of Argyll, Scotland (2018)
  • Author(s): Fairchild, I. J.., Spencer, A. M., Ali, D. O., Anderson, R., Anderton, R. P., Anderton, R., Boomer, I., Dove, D., Evans, J. D., Hambrey, M., Howe, J., Sawaki, Y., Shields, G. A., Skelton, A., Tucker, M. E., Wang, Z., Zhou, Y.
  • Journal Title: Precambrian Research Volume: 319 Pages: 37-64
  • DOI: 10.1016/j.precamres.2017.09.020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Chronological constraints on the Paleoproterozoic Francevillian Group in Gabon. (2017)
  • Author(s): Sawaki, Y., Moussavou, M., Sato, T., Suzuki, K., Ligna, C., Asanuma, H., Sakata, S., Obayashi, H., Hirata, T., Edou-Minko, A.,
  • Journal Title: Geoscience Frontiers Volume: 8 Issue: 2 Pages: 397-407
  • DOI: 10.1016/j.gsf.2016.10.001
  • NAID: 120006358790
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Geochemical characteristics of zircons in the Ashizuri A-type granitoids: An additional granite topology tool for detrital zircon studies (2017)
  • Author(s): Sawaki Yusuke、Suzuki Kazue、Asanuma Hisashi、Okabayashi Satoki、Hattori Kentaro、Saito Takuya、Hirata Takafumi
  • Journal Title: Island Arc Volume: 26 Issue: 6
  • DOI: 10.1111/iar.12216
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A prolonged granitoid formation in Saglek Block, Labrador: Zonal growth and crustal reworking of continental crust in the Eoarchean (2017)
  • Author(s): Komiya Tsuyoshi、Yamamoto Shinji、Aoki Shogo、Koshida Keiko、Shimojo Masanori、Sawaki Yusuke、Aoki Kazumasa、Sakata Shuhei、Yokoyama Takaomi D.、Maki Kenshi、Ishikawa Akira、Hirata Takafumi、Collerson Kenneth D.
  • Journal Title: Geoscience Frontiers Volume: 8 Issue: 2 Pages: 355-385
  • DOI: 10.1016/j.gsf.2016.06.013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Reactions between olivine and CO2-rich seawater at 300 °C: Implications for H2 generation and CO2 sequestration on the early Earth. (2017)
  • Author(s): Ueda, H., Sawaki, Y., Maruyama, S.
  • Journal Title: Geoscience Frontiers Volume: 8 Issue: 2 Pages: 387-396
  • DOI: 10.1016/j.gsf.2016.10.002
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga (2017)
  • Author(s): Edou-Minko A., Moussavou M., Sato T., Tchikoundzi C., Sawaki Y., Ndong Ondo S., Ortega R., Maire R., Kaestner A., Mbina Mounguengui M., Roudeau S., Fleury G., Carmona A., de Parseval PH., Makaya Mvoubou., Musavu Moussavou B., Ogandaga Agondjo M., Sasaki O., Maruyama S.
  • Journal Title: Journal of Geology & Geophysics Volume: 6:281 Issue: 02 Pages: 1-21
  • DOI: 10.4172/2381-8719.1000281
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] New isotopic age data constrain the depositional age and accretionary history of the Neoproterozoic-Ordovician Mona Complex (Anglesey-Lleyn, Wales) (2017)
  • Author(s): H. Asanuma, W. Fujisaki, T. Sato, S. Sakata, Y. Sawaki, K. Aoki, Y. Okada, S. Maruyama, T. Hirata, T. Itaya, B.F. Windely
  • Journal Title: Tectonophysics Volume: 706-707 Pages: 164-195
  • DOI: 10.1016/j.tecto.2017.03.017
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Growth, Duplication and Lateral Mutual Compressive Deformation of Akouemma hemisphaeria on the Seafloor of Okondja Basin at 2.2 Ga (Gabon) (2017)
  • Author(s): Edou-Minko Ambroise、Moussavou Mathieu、Sato Tomohiko、Sawaki Yusuke、Ondo Simplice Ndong、Maire Richard、Fleury Guillaume、Mounguengui Michel Mbina、Kaestner Anders、Ortega Richard、Roudeau Stephane、Carmona Asuncion、Mvoubou Makaya、Moussavou Benjamin Musavu、Sasaki Osamu、Maruyama Shigenori
  • Journal Title: International Journal of Geosciences Volume: 08 Issue: 09 Pages: 1172-1191
  • DOI: 10.4236/ijg.2017.89067
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Radiogenic Sr isotope chemostratigraphy of the Ediacaran Doushantuo Formation in the Yangtze Craton, South China (2019)
  • Author(s): 澤木佑介
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Trace element composition of zircon in Kofu granites: Quantitative indicator of sediment involved in parent magma (2019)
  • Author(s): Sawaki, Y., Asanuma, H., Sakata, S., Ohno, T.
  • Organizer: 日本地質学会第126年学術大会
• [Presentation] Constraint on the origin of methane from serpentinite-hosted Hakuba Happo hot spring by using 14CH4 and noble gas isotope (2019)
  • Author(s): Suda, K., Aze, T., Miyairi, Y., Yokoyama, Y., Matsui, Y., Ueda, H., Saito, T., Sato, T., Sawaki, Y., Nakai, R., Tamaki, H., Takahashi, H., Morikawa, N.
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 地質学的産状と化学組成を用いたグリーンランド・イスア表成岩帯の変成炭酸塩岩の起源の解明と初期太古代海洋環境の復元 (2019)
  • Author(s): Yoshida, S., Yasukawa, K., Kato, Y., Sawaki, Y., Komiya, T.
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Behavior of phosphorus during hydrothermal alteration of basalt under CO2-rich condition (2019)
  • Author(s): Murakami, A., Sawaki, Y., Ueda, H., Orihashi, Y., Machida, H., Komiya, H.
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Geotectonic history of Mona Complex in Anglesey-Lleyn, Wales (2019)
  • Author(s): Asanuma, H., Sawaki, Y., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] ガボン前期原生代フランスヴィル層群の炭酸塩炭素同位体層序 (2019)
  • Author(s): Sato, T., Sawaki, Y., Asanuma, H., Ueda, H., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2019年大会
  • Invited
• [Presentation] Origin of methane in Hakuba Happo serpentinite-hosted hot spring: 14C and noble gas study (2019)
  • Author(s): Suda, K., Aze, T., Miyairi, Y., Yokoyama, Y., Matsui, Y., Ueda, H., Saito, T., Sato, T., Sawaki, Y., Nakai, R., Tamaki, H., Takahashi, H., Morikawa, N.
  • Organizer: Goldschmidt 2019 Conference
  • Int'l Joint Research
• [Presentation] Shift in limiting nutrients in late Ediacaran-early Cambrian oceans (2019)
  • Author(s): Nishizawa, M., Tsuchiya, Y., Du, W., Sawaki, Y., Matsui, Y., Wang, Y., Han, J., Komiya, T.
  • Organizer: Goldschmidt 2019 Conference
  • Int'l Joint Research
• [Presentation] Magnesium and strontium isotopic fractionations during experimental water-rock interactions at 300 °C, 500 bars (2019)
  • Author(s): Takei, Y., Ueda, H., Sawaki, Y., Ohno, T., Sakata, S.
  • Organizer: Goldschmidt 2019 Conference
  • Int'l Joint Research
• [Presentation] Occurrence and chemical composition of metamorphic carbonate rocks in the Isua supracrustal belt, West Greenland: Implications for the origin of the metacarbonate rocks and transitional trace element compositions of the Eoarchean seawater (2019)
  • Author(s): Yoshida, S., Yasukawa, K., Kato, Y., Sawaki, Y., Komiya, T.
  • Organizer: 日本地質学会第126年学術大会
• [Presentation] Carbon and nitrogen isotope signals of organic matter in the Cap Carbonate rock: Recovery of biological activity during deglaciation of the Marinoan Snowball Earth (2019)
  • Author(s): Anzai, M., Matsui, Y., Nishizawa, M., Sawaki, Y., Komiya, T.
  • Organizer: 日本地質学会第126年学術大会
• [Presentation] The end of the positive carbon isotope excursion and the appearance of eukaryotes in the Paleoproterozoic (2019)
  • Author(s): Sato, T., Sawaki, Y., Matsui, Y., Maruayma, S.
  • Organizer: 日本地質学会第126年学術大会
• [Presentation] Revised U-Pb zircon geochronology in the Archean North Pole area (2019)
  • Author(s): Asanuma, H., Sawaki, Y., Sakata, S., Maruyama, S.
  • Organizer: 日本地質学会第126年学術大会
• [Presentation] 二酸化炭素に富んだ蛇紋岩熱水 系のMg 同位体比 (2019)
  • Author(s): Ueda, H., Sawaki, Y., Takei, Y., Ohno, T., Shibuya, T.
  • Organizer: 2019年度日本地球化学会年会
• [Presentation] Magnesium and strontium isotopic fractionations during water-rock interactions in seafloor hydrothermal systems (2019)
  • Author(s): Takei, Y., Sawaki, Y., Ueda, H., Ohno, T.
  • Organizer: 2019年度日本地球化学会年会
• [Presentation] Development of new analytical methods for promoting research on Earth Metallomics (2019)
  • Author(s): Ohno, T., Sakata, S., Ijichi, Y., Nakabayashi, K., Fukami, Y., Sawaki, Y., Yamamoto, S.
  • Organizer: 2019年度日本地球化学会年会
• [Presentation] Quantitative estimation of continental weathering rate in the Ediacaran and Cambrian evidenced from radiogenic and stable Sr isotope ratios (2018)
  • Author(s): 澤木佑介
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 初期地球の熱水から供給される溶存成分 (2018)
  • Author(s): 澤木佑介
  • Organizer: 日本進化学会年大会 第２０回東京大会
  • Invited
• [Presentation] Geochemical study for serpentinite-hosted hyperalkaline hot spring in Hakuba Happo, Japan (2018)
  • Author(s): Suda, K., Gilbert, A., Ueda, H., Saito, T., Sato, T., Sawaki, Y., Yamada, K., Yoshida, N., Ueno, U., Matsui, Y., Nakai, R., Tamaki, H., Kaneko, M., Takahashi, H., Morikawa, N.
  • Organizer: 日本地球惑星科学連合2018年大会
  • Invited
• [Presentation] Copper chemostratigraphy of the Ediacaran and Early Cambrian in the Three Gorges area, South China: (2018)
  • Author(s): Geng, Y., Ohno, T., Sawaki, Y., Aoki, S., Matsu'ura, F., Komiya, T.
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Global perturbations of carbon cycle in the mid-Panthalassa during the Triassic-Jurassic transition (2018)
  • Author(s): Fujisaki, W., Sawaki, Y., Matsui, Y., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Re-interpretation of Anglesey-Lleyn geotectonic framework in terms of the Pacific-type orogenic evolution (2018)
  • Author(s): Asanuma, H., Fujisaki, W., Sato, T., Sawaki, Y., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] ガボン・フランスヴィル堆積盆における大型化石出現前後の前期原生代有機炭素・窒素同位体層序 (2018)
  • Author(s): Sato, T., Sawaki, Y., Maruyama, S., Matsui, Y.
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Redox condition and nitrogen cycle in the Permian deep mid-Panthalassa: A possible contrast between Panthalassa and Tethys (2018)
  • Author(s): Fujisaki, W., Sawaki, Y., Matsui, Y., Yamamoto, S., Isozaki, Y., Maruyama, S.
  • Organizer: 日本地質学会第125年学術大会
• [Presentation] Magnesium and strontium isotopic fractionations during water-rock interactions in seafloor hydrothermal systems (2018)
  • Author(s): Takei, Y., Ueda, H., Sawaki, Y., Sakata, S., Ohno, T.
  • Organizer: 2018年度日本地球化学会年会
• [Presentation] Toward a better understanding of trace element availability in Paleo-proterozoic seawater (2017)
  • Author(s): 澤木佑介、佐藤友彦、丸山茂徳
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] 87Sr/86Sr chemostratigraphy of Ediacaran Doushantuo Formation in the Yangtze Craton, South China (2017)
  • Author(s): 澤木佑介
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Elevated Zn concentration in Paleoproterozoic seawater (2017)
  • Author(s): 澤木佑介、佐藤友彦、丸山茂徳
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] Mid-Aechean low geothermal gradient metamorphism: constraints from phase relationships in metamorphosed BIF from the Inyoni shear zone of the Barberton granite-greenstone belt, South Africa (2017)
  • Author(s): 青木一勝、山本伸次、澤木佑介、浅沼尚、小宮剛
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Experimental study on chemical nature of fluids in komatiite-hosted hydrothermal system on the early Earth (2017)
  • Author(s): Ueda, H., Shibuya, T., Sawaki, Y., Saitoh, M., Takai, K., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2017年大会
  • Invited
• [Presentation] Oceanic sulfate increase events in the Ediacaran ocean (2017)
  • 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2017年大会
• [Presentation] U-Pb zircon geochronology of the North Pole Dome adamellite in the eastern Pilbara Craton (2017)
  • Author(s): Asanuma, H., Obayashi, H., Sawaki, Y., Sakata, S., Suzuki, K., Kitajima, K., Hirata, T., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Biodiversity in the Paleoproterozoic Francevillian Group, Gabon (2017)
  • Author(s): Sato, T., Sawaki, Y., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] The redox history and nitrogen cycle in the pelagic Panthalassic deep ocean during the double-phased extinction interval across Paleozoic-Mesozoic transition (2017)
  • Author(s): Fujisaki, W., Sawaki, Y., Yamamoto, S., Matsui, Y., Nishizawa, M., Isozaki, Y., Maruyama, S.
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] An oxidation event caused by a bolide impact?: Stratigraphy of the late Archean carbonates in western Australia (2017)
  • Author(s): Saitoh, M., Kurosawa, K., Usui, Y., Okumura, T., Onoue, T., Sato, H., Ishida, Y., Shibuya, T., Nishizawa, M., Matsui, Y., Sawaki, Y., Sato, T., Ueno, Y.
  • Organizer: 2017年度日本地球化学会年会
• [Presentation] A hydrothermal experiment using serpentinites exposed at Hakuba area (2017)
  • Author(s): 宮沢真盛, 青栁美里, 北沢蒼生, 原一煕, 田中俊博, 上田修裕, 澤木佑介
  • Organizer: 2017年度日本地球化学会年会
• [Presentation] Zircon U-Pb age of the Kurobegawa Granite in Omachi, Nagano: Towards the discovery of outcrops of the youngest granite on the Earth (2017)
  • Author(s): Taniguchi, H., Kinoshita, K., Morade, S., Hirabayashi, M., Sato, T., Sawaki, Y., Sakata, S.
  • Organizer: 2017年度日本地球化学会年会
• [Presentation] Chemical nature of fluids in komatiite-hosted hydrothermal system on the early Earth (2017)
  • Author(s): Ueda, H., Shibuya, T., Sawaki, Y., Saitoh, M., Takai, K., Maruyama, S.
  • Organizer: 2017年度日本地球化学会年会
• [Presentation] Paleoproterozoic carbon isotopic stratigraphy in Gabon (2017)
  • Author(s): Sato, T., Sawaki, Y., Saitoh, M., Matsui, Y., Maruyama, S.
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] The possible linkages between carbon perturbations during the Toarcian Oceanic Anoxic Event and the Karoo-Ferrar volcanism in the central Panthalassa (2017)
  • Author(s): Fujisaki, W., Ueda, H., Suda, K., Sato, T., Matsui, Y., Sawaki, Y., Yokoyama, T.
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] Zircon chronology of the Shurugwi greenstone belt in the Zimbabwe Craton and implication for the history of continental growth (2017)
  • Author(s): Sawada, H., Isozaki, Y., Sawaki, Y., Sakata, S., Fujisaki, W., Sato, T., Saito, T., Ueda, H., Maruyama, S.
  • Organizer: 日本地質学会第124年学術大会
• [Presentation] An oxidation event caused by a bolide impact?: Stratigraphy of the late Archean carbonates in western Australia (2017)
  • Author(s): Saitoh, M., Kurosawa, K., Usui, Y., Okumura, T., Onoue, T., Sato, H., Ishida, Y., Shibuya, T., Nishizawa, M., Matsui, Y., Sawaki, Y., Sato, T., Ueno, Y.
  • Organizer: 日本地質学会第124年学術大会
• [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., Maruyama, S., Ueda, H., Saito, T., Sato, T.
  • Organizer: GSA Annual Meeting
  • Int'l Joint Research
• [Presentation] Paleoproterozoic organic carbon and nitrogen isotopic stratigraphy across the appearance of macrofossils in the Francevillian Basins, Gabon (2017)
  • Author(s): Sato, T., Sawaki, Y., Saitoh, M., Matsui, Y., Maruyama, S., Bakakas, K., Ligna, C., Moussavou, M., Edou-Minko, A.
  • Organizer: GSA Annual Meeting
  • Int'l Joint Research
• [Remarks] 澤木佑介のHP
  • URL: https://y-sawaki.jimdofree.com/
• [Remarks] 澤木佑介のホームページ
  • URL: https://y-sawaki.jimdo.com/