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2018 Fiscal Year Annual Research Report

Origin and modification of subcontinental mantle deduced from the oldest peridotite body

Research Project

Project/Area Number 16H05741
Research InstitutionKanazawa University

Principal Investigator

森下 知晃  金沢大学, 地球社会基盤学系, 教授 (80334746)

Co-Investigator(Kenkyū-buntansha) 谷 健一郎  独立行政法人国立科学博物館, 地学研究部, 研究主幹 (70359206)
水上 知行  金沢大学, 地球社会基盤学系, 助教 (80396811)
針金 由美子  国立研究開発法人産業技術総合研究所, 地質調査総合センター, 主任研究員 (90569360)
Project Period (FY) 2016-04-01 – 2019-03-31
Keywordsカンラン岩 / 太古代 / 初期地球 / 大陸形成 / プレートテクトニクス
Outline of Annual Research Achievements

本研究の目的は,地球科学の未解決問題である大陸の形成や大陸の安定性の鍵となる大陸下マントル物質の成因,および地球史に置けるプレートテクトニクス開始時期とその様式について,西グリーンランド南部に分布する30億年前と38億年前に形成された変成岩・花崗岩からなる地質帯中のカンラン岩を研究対象とし,物質科学的に検証することである.研究実績の概要は以下の通りである.
(1)従来の研究では着目されてこなかった周囲の変成岩・花崗岩の影響によるカンラン岩の改変過程を明らかにした. 野外での産状,鉱物相,全岩・鉱物化学組成の検討から,周囲の変成岩・花崗岩による化学的・物質的流入により,調査対象のカンラン岩類が大きく組成改変を受けていることが明らかとなった.そのうちの一部は,ある種の大陸下カンラン岩と類似するSiO2に富む特徴を獲得することがわかった.
(2)カンラン岩の温度圧力履歴の解明. カンラン岩体の中に温度圧力履歴を推定するのに役立つ鉱物組み合わせ,微細組織を有するものがあることから,岩体の経験した温度圧力履歴を解析した.その結果,本地域では初めてとなるエクロジャイト相相当の温度圧力履歴を経ていることが明らかとなり,現在,その温度圧力履歴が可能なテクトニクスについて検討している.
(3)上記の改変の影響を評価した上で,カンラン岩の火成岩としての成因について検討できる同位体組成を測定した結果,カンラン岩体の同位体的特徴は,現在のカンラン岩類とは大きく異なり,地球形成初期のレイトベニア 付加前の始原的な特徴を保持している可能性を指摘し,レイトベニア の特徴を議論した.我々の結果から,レイトベニア に相当する物質により,現在の地球表層の水成分が付け加わったことが初めて明らかとなった.

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

    (24 results)

All 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (12 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 12 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] University of Copenhagen(デンマーク)

    • Country Name
      DENMARK
    • Counterpart Institution
      University of Copenhagen
  • [Int'l Joint Research] University of Alberta(カナダ)

    • Country Name
      CANADA
    • Counterpart Institution
      University of Alberta
  • [Int'l Joint Research] University of Cologne(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      University of Cologne
  • [Journal Article] The paleozoic Jalal Abad mafic complex (Central Iran): Implication for the petrogenesis2020

    • Author(s)
      Vesali Yusef、Esmaeily Dariush、Moazzen Mohssen、Chiaradia Massimo、Morishita Tomoaki、Soda Yusuke、Sheibi Maryam
    • Journal Title

      Geochemistry

      Volume: In press Pages: 125597~125597

    • DOI

      10.1016/j.chemer.2020.125597

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Petrogenesis of the ~740 Korab Kansi mafic-ultramafic intrusion, South Eastern Desert of Egypt: Evidence of Ti-rich ferropicritic magmatism2020

    • Author(s)
      Khedr Mohamed Zaki、El-Awady Amr、Arai Shoji、Hauzenberger Christoph、Tamura Akihiro、Stern Robert J.、Morishita Tomoaki
    • Journal Title

      Gondwana Research

      Volume: 82 Pages: 48~72

    • DOI

      10.1016/j.gr.2019.12.013

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of banded chromitites and associated sulphides in the Neoproterozoic subarc deep-crustal magma inferred from the Alaskan-type complex, Egypt2020

    • Author(s)
      Khedr Mohamed Zaki、Arai Shoji、Morishita Tomoaki
    • Journal Title

      Ore Geology Reviews

      Volume: 120 Pages: 103410~103410

    • DOI

      10.1016/j.oregeorev.2020.103410

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ruthenium isotope vestige of Earth’s pre-late-veneer mantle preserved in Archaean rocks2020

    • Author(s)
      Fischer-G?dde Mario、Elfers Bo-Magnus、M?nker Carsten、Szilas Kristoffer、Maier Wolfgang D.、Messling Nils、Morishita Tomoaki、Van Kranendonk Martin、Smithies Hugh
    • Journal Title

      Nature

      Volume: 579 Pages: 240~244

    • DOI

      10.1038/s41586-020-2069-3

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Compositional heterogeneity and melt transport in mantle beneath Mid-Atlantic Ridge constrained by peridotite, dunite, and wehrlite from Atlantis Massif2020

    • Author(s)
      Akizawa Norikatsu、Fr?h-Green Gretchen L.、Tamura Akihiro、Tamura Chiori、Morishita Tomoaki
    • Journal Title

      Lithos

      Volume: 354-355 Pages: 105364~105364

    • DOI

      10.1016/j.lithos.2019.105364

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evolution of lithospheric mantle in the north of Nain‐Baft oceanic crust (Neo‐Tethyan ophiolite of Ashin, Central Iran)2020

    • Author(s)
      Shirdashtzadeh Nargess、Torabi Ghodrat、Morishita Tomoaki
    • Journal Title

      Island Arc

      Volume: 29 Pages: 1~12

    • DOI

      10.1111/iar.12342

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evidence of subduction-related components in sapphirine-bearing gabbroic dykes (Finero phlogopite?peridotite): Insights into the source of the Triassic?Jurassic magmatism at the Europe?Africa boundary2020

    • Author(s)
      Giovanardi Tommaso、Zanetti Alberto、Dallai Luigi、Morishita Tomoaki、H?mond Christophe、Mazzucchelli Maurizio
    • Journal Title

      Lithos

      Volume: 356-357 Pages: 105366~105366

    • DOI

      10.1016/j.lithos.2020.105366

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Alkali basalt from the Seifu Seamount in the Sea of Japan: post-spreading magmatism in a back-arc setting2020

    • Author(s)
      Morishita Tomoaki、Hirano Naoto、Sumino Hirochika、Sato Hiroshi、Shibata Tomoyuki、Yoshikawa Masako、Arai Shoji、Nauchi Rie、Tamura Akihiro
    • Journal Title

      Solid Earth

      Volume: 11 Pages: 23~36

    • DOI

      10.5194/se-11-23-2020

    • Peer Reviewed / Open Access
  • [Journal Article] Implications for the origins of Eoarchean ultramafic rocks of the North Atlantic Craton: a study of the Tussaap Ultramafic complex, Itsaq Gneiss complex, southern West Greenland2019

    • Author(s)
      McIntyre T.、Pearson D. G.、Szilas K.、Morishita T.
    • Journal Title

      Contributions to Mineralogy and Petrology

      Volume: 174 Pages: 1~19

    • DOI

      10.1007/s00410-019-1628-9

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lower Oligocene Calc-Alkaline Spessartitic Lamprophyres from Central Iran (East of Anarak Area); an Evidence from the Eastern Branch of Neotethys Subduction-Related Mantle Enrichment2019

    • Author(s)
      Nazari Gh. H.、Torabi Gh.、Arai Sh.、Morishita T.
    • Journal Title

      Geotectonics

      Volume: 53 Pages: 786~805

    • DOI

      10.1134/S0016852119060098

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Melt?fluid infiltration along detachment shear zones in oceanic core complexes: Insights from amphiboles in gabbro mylonites from the Godzilla Megamullion, Parece Vela Basin, the Philippine Sea2019

    • Author(s)
      Harigane Yumiko、Okamoto Atsushi、Morishita Tomoaki、Snow Jonathan E.、Tamura Akihiro、Yamashita Hiroyuki、Michibayashi Katsuyoshi、Ohara Yasuhiko、Arai Shoji
    • Journal Title

      Lithos

      Volume: 344-345 Pages: 217~231

    • DOI

      10.1016/j.lithos.2019.06.019

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Petrological characteristics of the Middle Eocene Toveireh pluton (southwest of Jandaq, central Iran): implications for the eastern branch of the Neo-Tethys subduction2019

    • Author(s)
      SARGAZI Masumeh、TORABI Ghodrat、MORISHITA Tomoaki
    • Journal Title

      TURKISH JOURNAL OF EARTH SCIENCES

      Volume: 28 Pages: 558~588

    • DOI

      10.3906/yer-1807-45

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Metasomatic and metamorphic overprints on the Archean Ulamertoq ultramafic body in the southern West Greenland2019

    • Author(s)
      Nishio, I., Morishita, T., Szilas, K., Tamura, A., Guotana, J.-M., Tani, K., Harigane, Y., Person, G
    • Organizer
      AGU Fall meeting
    • Int'l Joint Research
  • [Presentation] Hadean Peridotites in Greenland?2019

    • Author(s)
      Szilas, K., Morishita, T., Pearson, G.
    • Organizer
      Gosldschmidt
    • Int'l Joint Research / Invited
  • [Presentation] Ru Isotope Composition of the Earth's Pre-Late Veneer Mantle2019

    • Author(s)
      Fischer-Godde, M., Munker, E B-M., Szilas, K., Maier, W., Morishita, T., Smithies, H., Messling, N.
    • Organizer
      Gosldschmidt
    • Int'l Joint Research
  • [Presentation] Identifying the Source Characteristics of Intraplate Alkali Basalts, Hosting the Lithopsheric Mantle Xenolith from Kutch Area, Western India2019

    • Author(s)
      Chattopadhaya S, Ghosh B, Bandyopadhyay D & Morishita T
    • Organizer
      Gosldschmidt
    • Int'l Joint Research
  • [Presentation] Melt Migration and Interactions in the Lower Oceanic Crust: Insights from Atlantis Bank Interlayered Series at IODP Hole U1473A (Southwest Indian Ridge)2019

    • Author(s)
      France L, Boulanger M, Ferrando C, Ildefonse B, Sanfilippo A, Ghosh B, Morishita T, Liu C-Z, Koepke J & Bruguier O
    • Organizer
      Gosldschmidt
    • Int'l Joint Research
  • [Presentation] The PGE and Os Isotope Variations in the Mantle Transition Zone from the Samail Ophiolite from the Oman Drilling Project Cores2019

    • Author(s)
      Senda R, Suzuki K, Morishita T, Takazawa E, Michibayashi K, Kelemen P, Teagle D, Coggon J, Godard M & The Oman Drilling Project SP
    • Organizer
      Gosldschmidt
    • Int'l Joint Research
  • [Presentation] Serpentinization and carbonation of dunites in the western part of the Isua Supracrustal Belt, Southwestern Greenland2019

    • Author(s)
      Guotana, J. M. R., Morishita, T., Tamura, A., Nishio, I., Tani, K., Harigane, Y., Szilas, K., Person, D.G.
    • Organizer
      JpGU
  • [Presentation] Origin of chromitites in the Akulleq terrane, southern West Greenland2019

    • Author(s)
      Takahashi, K.,Morishita, T., Guotana, J.M.R., Tani, K., Harigane, Y.. Nishio, I., Szilas, K., Tamura, A.
    • Organizer
      JpGU
  • [Remarks] 38億年前の岩石に保存されたルテニウム同位体から地球の化学進化の過程を解明

    • URL

      https://www.kanazawa-u.ac.jp/rd/77050

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Published: 2021-01-27  

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