Investigation of the plume source regions using mantle xenoliths

2021 Fiscal Year Annual Research Report

• Project/Area Number: 19H01998
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: 石川 晃 東京工業大学, 理学院, 准教授 (20524507)
• Co-Investigator(Kenkyū-buntansha): 横山 哲也 東京工業大学, 理学院, 教授 (00467028) ; 角野 浩史 東京大学, 大学院総合文化研究科, 准教授 (90332593)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: マントル / かんらん岩 / ハワイ諸島 / 強親鉄性元素 / オスミウム同位体

Outline of Annual Research Achievements

本研究課題では海洋域マントル捕獲岩に認められる岩石学的/地球化学的バリエーションを網羅的に理解し、通常の海洋リソスフェアとマントルプルームに由来するマントルかんらん岩の判別指標を提示することを目的としている。昨年度までの研究により重点的にデータを取得してきたハワイ諸島、オアフ島ソルトレーククレーター産かんらん岩捕獲岩とカウラ島産かんらん岩捕獲岩はともにリソスフェア深部相当の高温条件を記録しているにもかかわらず、メルト成分に著しく枯渇した化学組成を有する点で類似した特徴を示すことが判明している。そこで当該年度は、上記特徴が通常の海洋リソスフェアとして異質であることを改めて検証するべく、（１）ざくろ石の仮像が発見されたクック諸島産かんらん岩、（２）プルーム火山に由来しない東北沖プチスポット産かんらん岩、（３）低温かんらん岩が多産するハワイ諸島カウアイ島産かんらん岩、の３地域に焦点を当てて太平洋域リソスフェアのデータ拡充を進めた。かんらん岩の構成鉱物が記録する平衡温度圧力条件を詳細に解析した結果、上記３地域いずれも過去のプルーム活動によりプレートが厚くなったオントンジャワ海台直下リソスフェアに比べて高い地温勾配が記録されていることが判明した。とりわけハワイ諸島の捕獲岩はおよそ90Maの比較的古い海洋に産しているにもかかわず、他地域よりも高い地温勾配で特徴づけられることから、プルーム活動により著しくリソスフェアが薄化している可能性が示された。このことは、ハワイ諸島カウアイ島とカウラ島のかんらん岩に認められる平衡温度の差が、局所的な温度構造ではなく由来深度の違いを反映しており、浅部リソスフェアと深部プルーム物質の地球化学的判別を試みる上で有用な試料であることを示している。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Department of Earth Sciences/Univeristy of Hawai‘i at Manoa(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Department of Earth Sciences/Univeristy of Hawai‘i at Manoa
• [Journal Article] Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites (2023)
  • Author(s): Yokoyama, T., Nagashima, K., Nakai, I., Young, E. D., Abe, Y., Aleon, J., ---, Ishikawa, A., ---, Yurimoto, H.
  • Journal Title: Science Volume: 379 Pages: 1-10
  • DOI: 10.1126/science.abn7850
  • Peer Reviewed
• [Journal Article] Rock and sediment dataset of petit-spots in the northwestern Pacific (2022)
  • Author(s): Akizawa, N., Nirano, N., Machida, S., Ishikawa, A., Niwa, Y., Shimoda, G., Yasukawa, K., Matuzaki, K. M., Tamura, C., Kaneko, J.
  • Journal Title: Data in Brief Volume: 45 Pages: 108764
  • DOI: 10.1016/j.dib.2022.108764
  • Peer Reviewed
• [Journal Article] Sulfur in Archean komatiite implies early subduction of oceanic lithosphere (2022)
  • Author(s): Kubota, Y., Matsu’ura, F., Shimizu, K., Ishikawa, A., Ueno, Y.
  • Journal Title: Earth and Planetary Sciences Letters Volume: 598 Pages: 117826
  • DOI: 10.1016/j.epsl.2022.117826
  • Peer Reviewed
• [Journal Article] Geochemical records of the end-Triassic Crisis preserved in a deep marine section of the Budva Basin, Dinarides, Montenegro (2022)
  • Author(s): de Graaff, S.J., Percival., L., Kaskes, P., Dehais, T., de Winter, N.J., Jansen, M.N., Smit, J., Sinnesael, M., Vellekoop, J., Sato, H., Ishikawa, A., Spassov, S., Claeys, P., Goderis, S.
  • Journal Title: Palaeogeography Palaeoclimatology Palaeoecology Volume: 606 Pages: 111250
  • DOI: 10.1016/j.palaeo.2022.111250
  • Peer Reviewed
• [Journal Article] Chemical and Isotopic Evaluation of a Microsampling Method Using Laser Ablation and Membrane Filter (LAF) (2022)
  • Author(s): Masuda, Y., Yokoyama, T., Okabayashi, S., Ishikawa, A., Iwamori, H.
  • Journal Title: Geostandards and Geoanalytical Research Volume: 46 Pages: 205-222
  • DOI: 10.1111/ggr.12426
  • Peer Reviewed
• [Journal Article] The Solar System calcium isotopic composition inferred from Ryugu samples (2022)
  • Author(s): Moynier, F., Dai, W., Yokoyama, T., Hu, Y., Paquet, M., Abe, Y., ---, Ishikawa, A., ---, Yurimoto, H.
  • Journal Title: Geochemical Perspectives Letters Volume: 24 Pages: 1-6
  • DOI: 10.7185/geochemlet.2238
  • Peer Reviewed
• [Journal Article] Ryugu's nucleosynthetic heritage from the outskirts of the Solar System (2022)
  • Author(s): Hopp, T., Dauphas, N., Abe, Y., Aleon, J., Alexander, C. M. O'D., Amari, S., ---, Ishikawa, A., ---, Yurimoro, H.
  • Journal Title: Science Advances Volume: 8 Pages: 1-9
  • DOI: 10.1126/sciadv.add8141
  • Peer Reviewed
• [Journal Article] Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis (2022)
  • Author(s): Paquet, M., Moynier, F., Yokoyama, T., Dai, W., Hu, Y., Abe, Y., ---, Ishikawa, A., ---, Yurimoto, H.
  • Journal Title: Nature Astronomy Volume: 7 Pages: 182-189
  • DOI: 10.1038/s41550-023-01938-6
  • Peer Reviewed
• [Journal Article] Presolar Stardust in Asteroid Ryugu (2022)
  • Author(s): Barosch, J.,Nittler, L., Wang, J., Alexander, C. M. O'D., De Gregorio, B. T., England, C., ---, Ishikawa, A., ---, Yurimoto, H.
  • Journal Title: The Astrophysical Journal Letters Volume: 935 Pages: 1-12
  • DOI: 10.3847/2041-8213/ac83bd
  • Peer Reviewed / Open Access
• [Journal Article] Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2 (2022)
  • Author(s): Kawasaki, N., Nagashima, K., Sakamoto, N., Matsumoto, T., Bajo, K.-I., Wada, S., ---, Ishikawa, A., ---, Yurimoto, H.
  • Journal Title: Science Advances Volume: 8 Pages: 1-10
  • DOI: 10.1126/sciadv.ade2067
• [Journal Article] 超オントンジャワ仮説の検証 ─地球最大の超巨大火山─ (2021)
  • Author(s): 佐野 貴司, テハタ マリア ルイサ, 中西 正男, 羽生 毅, 三浦 誠一, 末次 大輔, 利根川 貴志, 石川 晃, 清水 健二, 清水 祥伽
  • Journal Title: 地学雑誌 Volume: 130 Pages: 559-584
  • DOI: 10.5026/jgeography.130.559
  • Peer Reviewed
• [Journal Article] Sedimentary record of Upper Triassic impact in the Lagonegro Basin, southern Italy: Insights from highly siderophile elements and Re-Os isotope stratigraphy across the Norian/Rhaetian boundary (2021)
  • Author(s): Honami Sato, Akira Ishikawa, Tetsuji Onoue, Yuki Tomimatsu, Manuel Rigo
  • Journal Title: Chemical Geology Volume: 586 Pages: 120506
  • DOI: 10.1016/j.chemgeo.2021.120506
  • Peer Reviewed
• [Journal Article] Halogen heterogeneity in the subcontinental lithospheric mantle revealed by I/Br ratios in kimberlites and their mantle xenoliths from South Africa, Greenland, China, Siberia, Canada, and Brazil (2021)
  • Author(s): Chiaki Toyama, Hirochika Sumino, Nobuaki Okabe, Akira Ishikawa, Junji Yamamoto, Ichiro Kaneoka, Yasuyuki Muramatsu
  • Journal Title: American Mineralogist Volume: 106 Pages: 1890-1899
  • DOI: 10.2138/am-2021-7332
  • Peer Reviewed
• [Journal Article] Highly refractory dunite formation at Gibbs Island and Bruce Bank, and its role in the evolution of the circum-Antarctic continent (2021)
  • Author(s): Norikatsu Akizawa, Asuka Yamaguchi, Kenichiro Tani, Akira Ishikawa, Ryo Fujita, Sung Hi Choi
  • Journal Title: The Canadian Mineralogist Volume: 59 Pages: 1731-1753
  • DOI: 10.3749/canmin.2100030
  • Peer Reviewed
• [Journal Article] Seismic evidence for a thermochemical mantle plume underplating the lithosphere of the Ontong Java Plateau (2021)
  • Author(s): Takehi Isse, Daisuke Suetsugu, Akira Ishikawa, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Yuki Kawano, Kazunori Yoshizawa, Yasushi Ishihara, Satoru Tanaka, Masayuki Obayashi, Takashi Tonegawa, Junko Yoshimitsu
  • Journal Title: COMMUNICATIONS EARTH & ENVIRONMENT Volume: 2 Pages: 1-7
  • DOI: 10.1038/s43247-021-00169-9
  • Peer Reviewed / Open Access
• [Presentation] The thermal and chemical litho-stratigraphy beneath the Hawaiian Islands (2023)
  • Author(s): Ryo Fujita, Akira Ishikawa, Tetsuya Yokoyama, Michael O. Garcia
  • Organizer: Goldschmidt2023
• [Presentation] 海洋リソスフェアの温度構造：マントル捕獲岩研究からの視点 (2022)
  • Author(s): 石川 晃, 藤田 遼, 丹羽 佑果, 秋澤 紀克
  • Organizer: 日本地球化学会第69回年会
• [Presentation] 前弧域の枯渇したマントルカンラン岩が記録する古溶融イベント (2022)
  • Author(s): 秋澤 紀克, 石川 晃, 石井 輝秋
  • Organizer: 日本地球化学会第69回年会
• [Presentation] クック諸島産マントル捕獲岩から推定する太平洋プレートの熱化学構構造 (2022)
  • Author(s): 秋澤 紀克, 大嶋 ちひろ, 石川 晃, 角野 浩史, 小澤 一仁, 佐藤 侑人, 浜田 盛久
  • Organizer: 日本地球化学会第69回年会
• [Presentation] 神津島の流紋岩及び玄武岩質捕獲岩のMo安定同位体組成 (2022)
  • Author(s): 田村 達也, 横山 哲也, 石川 晃
  • Organizer: 日本地球化学会第69回年会
• [Presentation] Thermal structure of oceanic lithosphere constrained from the petit-spot mantle xenoliths (2022)
  • Author(s): Yuka Niwa, Akira Ishikawa, Norikatsu Akizawa
  • Organizer: Goldschmidt2022
  • Int'l Joint Research
• [Presentation] Simple and accurate determination of chalcophile and highly siderophile elements in carbonaceous chondrites using triple quadrupole ICP-MS (2022)
  • Author(s): Akira Ishikawa, Shun Nakano, Ryo Fujita, Tetsuya Yokoyama
  • Organizer: Goldschmidt2022
  • Int'l Joint Research
• [Presentation] Can the slightly depleted mantle be a high 3He/4He reservoir? (2022)
  • Author(s): Ryo Fujita, Akira Ishikawa, Hirochika Sumino, Michael O. Garcia
  • Organizer: Goldschmidt2022
  • Int'l Joint Research
• [Presentation] Evidence for suboceanic small-scale convection from a “garnet”-bearing lherzolite xenolith, Aitutaki Island, Cook Islands (2022)
  • Author(s): Norikatsu Akizawa, Kazuhito Ozawa, Tetsu Kogiso, Akira Ishikawa, Simon Richard Wallis, Tatsuhiko Kawamoto, Akihiro Tamura, Tomoaki Morishita
  • Organizer: Japan Geoscience Union Meeting 2022
• [Presentation] Molybdenum isotopic compositions in volcanic rocks from the Izu islands (2022)
  • Author(s): Tatsuya Tamura, Tetsuya Yokoyama, Akira Ishikawa, Takeshi Kuritani, Ikshu Gautam
  • Organizer: Japan Geoscience Union Meeting 2022
• [Presentation] The possibility of the depleted mantle being a high 3He/4He reservoir (2022)
  • Author(s): Ryo Fujita, Akira Ishikawa, Hirochika Sumino, Michael O Garcia
  • Organizer: Japan Geoscience Union Meeting 2022
• [Presentation] A thermal structure of oceanic lithosphere constrained from mantle xenoliths from the petit-spot volcano (2022)
  • Author(s): Yuka Niwa, Akira Ishikawa, Norikatsu Akizawa
  • Organizer: Japan Geoscience Union Meeting 2022
• [Presentation] Sampling source heterogeneities that bind the Ontong Java Nui puzzle together (2021)
  • Author(s): Maria Luisa Garcia Tejada, Takashi Sano, Takeshi Hanyu, Anthony Koppers, Masao Nakanishi, Akira Ishikawa, Takashi Miyazaki, Kenichiro Tani, Shoka Shimizu, Qing Chang, Bogdan Vaglarov
  • Organizer: Goldschmidt2021
  • Int'l Joint Research
• [Presentation] Highly siderophile element mobility during serpentinization of mantle wedge peridotite (2021)
  • Author(s): Akira Ishikawa, Natsuki Nakamura, Tetsuya Yokoyama
  • Organizer: Goldschmidt2021
  • Int'l Joint Research