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Stress estimates along the subduction boundary and next-generation of thermal models

Research Project

Project/Area Number 23K20895
Project/Area Number (Other) 21H01188 (2021-2023)
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund (2024)
Single-year Grants (2021-2023)
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionThe University of Tokyo

Principal Investigator

WALLIS R・Simon  東京大学, 大学院理学系研究科(理学部), 教授 (30263065)

Co-Investigator(Kenkyū-buntansha) 纐纈 佑衣  名古屋大学, 環境学研究科, 講師 (20726385)
武藤 潤  東北大学, 理学研究科, 教授 (40545787)
遠藤 俊祐  島根大学, 学術研究院環境システム科学系, 准教授 (60738326)
森 宏  信州大学, 学術研究院理学系, 助教 (80788183)
青矢 睦月  徳島大学, 大学院社会産業理工学研究部(理工学域), 准教授 (90415638)
Project Period (FY) 2021-04-01 – 2026-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2025: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2024: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2023: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords沈み込み / 応力 / 熱構造 / モデリング / 剪断熱 / 石英 / 微細組織 / 圧力温度経路 / Subduction / Stress / Sanbagawa metamorphism / Temperature / Thermal modeling / 三波川帯 / EBSD / 沈み込み帯 / 三波川変成作用 / 石英粒径 / EBSD測定 / 温度圧力経路 / 熱モデリング
Outline of Research at the Start

本プロジェクトの最終目標は新たに求めた応力情報を活用し,沈み込み帯の新しいモデル を構築することにある.また,この新モデルを基に次の研究課題に取り組みたいと考えている.沈み込み帯の応力状態は巨大地震発生率に関係すると提案されているが,発生しやすいのは高応力の場合という説と低応力の場合という説が対立しており,未解決問題である. 本プロジェクトで推定された応力の大小と沈み込み帯の特徴を比較することにより解決の道 筋がみえると期待される.

Outline of Annual Research Achievements

The purpose of this research is to use the rock record in subduction-type metamorphic belts, and in particular the well-developed and studied Sanbagawa belt of south west Japan, to estimate the shear stress acting along the subduction interface and incorporate these results in new thermal models of subduction zones. An important part of this study relies on accurate determination of the metamorphic temperature. We have made signifiant progress with this issue. In particular, we have shown that conventional methods for estimating Fe(II)/(III) ratios in the higher grade metamorphic rocks of the Sanbagawa belt are in sufficient to give accurate temperature estimates based on Mg-Fe cation exchange thermometry. We carried out numerous experiments using synchrotron radiation-based Micro XANES methods supported by Moessbauer analyses. There are still several aspects of the method that need to be refined before reliable results can be obtained, but the results of the previous year show considerable promise in the possibility to obtain significantly improved temperature estimates in some high-grade samples. We have also made significant progress in the analyses of microstructures required to derive reliable stress estimates. The progress includes evaluating the sectioning effect in measurements of grain size; something which is not incorporated in most previous studies. We also explored the theoretical background for approaches to use measurements of natural samples deformed under plane stress to laboratory examples deformed under uniaxial shortening.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

We have produced some good results over the last academic year that will form the basis for further development in the next. The main goal is to derive stress estimates. This has not yet been finalized but in combination with the improved temperature estimates that we have been able to develop, we have also made steady progress in the work necessary to analyze and quantify the microstructures of deformed metamorphic rocks that will allow us to estimate stress. We have also carried out thermo-mechanical modeling of convergent margins to investigate time-dependent behavior of the slab. Overall the project is on schedule to produce good results within the time span of the grant.

Strategy for Future Research Activity

We will continue with the work designed to improve our understanding of the thermal record of the Sanbagawa belt and other subduction-type metamorphic domains. This will include adapting the current analytical equipment for the micro XANES analyses and obtaining suitable standards. It is also important to have an estimate of the deformation temperature since the peak metamorphic temperature recorded by mineral assemblages and mineral chemistry is not necessarily the same as that at which the rocks deformed. To obtain the deformation temperature, we have examined the utility of using the geometry of quartz crystallographic orientation patterns. We have obtained useful results consistent with other estimates. However, to verify these empirically-derived estimates we also plan to carry out measurements of Ti content of quartz grains using SIMS and have already obtained the agreement of a lab with relevant experience in the USA. Stress estimates from samples derived from different depths will be important to assess how stress changes down dip of the subduction zone. There is also the possibility or likelihood of along-strike heterogeneity and obtaining samples over a broad area will also make a significant contribution to this study. We intend to expand our collection of suitable material to include samples from appropriate metamorphic grades and positions along strike.

Report

(2 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (24 results)

All 2022 2021

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (18 results) (of which Int'l Joint Research: 12 results,  Invited: 2 results)

  • [Journal Article] A possible mechanism for spontaneous cyclic back arc spreading2022

    • Author(s)
      Ishii K, Wallis SR
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 9 Issue: 1 Pages: 1-19

    • DOI

      10.1186/s40645-022-00486-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dehydration of brucite + antigorite under mantle wedge conditions: insights from the direct comparison of microstructures before and after experiments2022

    • Author(s)
      Takayoshi Nagaya, Atsushi Okamoto, Masanori Kido, Jun Muto, Simon R. Wallis
    • Journal Title

      Contributions to Mineralogy and Petrology

      Volume: 177 Issue: 9 Pages: 87-87

    • DOI

      10.1007/s00410-022-01956-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deformed Vein Sets as a Record of Synmetamorphic Volume Change: Quantifying Solution Mass Transfer in Subduction-Type Metasediments of the Del Puerto Canyon Region, Franciscan Belt, USA2022

    • Author(s)
      S. Soejima, S. R. Wallis
    • Journal Title

      Journal of Geophysical Research Solid Earth

      Volume: 127 Issue: 6 Pages: 1-24

    • DOI

      10.1029/2022jb024197

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recognition of broad thermal anomaly around the median tectonic line in central Kii peninsula, <scp>southwest</scp> Japan: Possible heat sources2022

    • Author(s)
      Yamaoka Ken、Wallis Simon R.
    • Journal Title

      Island Arc

      Volume: 31 Issue: 1 Pages: 1-15

    • DOI

      10.1111/iar.12440

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Enhancement of ductile deformation in polycrystalline anorthite due to the addition of water2022

    • Author(s)
      Fukuda Junichi、Muto Jun、Koizumi Sanae、Sawa Sando、Nagahama Hiroyuki
    • Journal Title

      Journal of Structural Geology

      Volume: 156 Pages: 104547-104547

    • DOI

      10.1016/j.jsg.2022.104547

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermal structure in subducted units from continental Moho depths in a palaeo subduction zone, the Asemigawa region of the Sanbagawa metamorphic belt, SW Japan2021

    • Author(s)
      Yui Kouketsu, Kazushi Sadamoto, Hayato Umeda, Hirokazu Kawahara, Takayoshi Nagaya, Tomoki Taguchi, Hiroshi Mori, Simon Wallis, Masaki Enami
    • Journal Title

      Journal of Metamorphic Geology

      Volume: 39 Pages: 727-749

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Use of contact metamorphic aureoles to estimate magma flux rates2022

    • Author(s)
      Simon Richard Wallis, Ken Yamaoka, Catherine Annen, Akira Miyake
    • Organizer
      American Geophysical Union Fall Meeting 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantitative Evaluation of Water Flux in the Franciscan Subduction Zone Based on Volume Change of Metamorphic Rocks2022

    • Author(s)
      Shogo Soejima, Simon Richard Wallis
    • Organizer
      American Geophysical Union Fall Meeting 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 深部スロー地震が発生する地質環境: 三波川変成帯の例2022

    • Author(s)
      小山 雪乃丞、ウォリス サイモン、永冶 方敬
    • Organizer
      日本地質学会第129年学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 放射光micro-XANES分光法による三波川変成帯エクロジャイト相岩体の温度圧力構造再評価2022

    • Author(s)
      伊藤 泰輔、ウォリス サイモン、高橋 嘉夫、遠藤 俊祐、小暮 敏博、淺原 良浩
    • Organizer
      日本地質学会第129年学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 周期的背弧拡大のメカニズム2022

    • Author(s)
      石井 和彦、ウォリス サイモン
    • Organizer
      日本地質学会第129年学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 日本の白亜紀-古第三紀の火成活動の時空間変遷とテクトニクスとの関連2022

    • Author(s)
      山岡 健、ウォリス サイモン
    • Organizer
      日本地質学会第129年学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Oblique Convergence Recorded in Strain Patterns of the Cretaceous Accretionary Complex of SW Japan2022

    • Author(s)
      S. R. Wallis
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 変形に起因する藍晶石から紅柱石への相転移:ボヘミア地塊南部Gfoehlグラニュライトの例2022

    • Author(s)
      吉岡 拓郎、金川 久一、廣井 美邦、平島 崇男、スフォイッカ マルティン、外田 智千、本吉 洋一、ウォリス サイモン、永冶 方敬
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fingerprints of subducted noble gas and halogen in the Franciscan serpentinite, California.2022

    • Author(s)
      任 杰、角野 浩史、ウォリス サイモン、永冶 方敬
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evidence for suboceanic small-scale convection from a “garnet”-bearing lherzolite xenolith, Aitutaki Island, Cook Islands2022

    • Author(s)
      秋澤 紀克、小澤 一仁、小木曽 哲、石川 晃、ウォリス サイモン、川本 竜彦、田村 明弘、森下 知晃
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Regional silica enrichment in subduction-type metasediments: Evidence from deformed mineral vein sets in the Del Puerto Canyon region, Franciscan Belt, USA2022

    • Author(s)
      副島 祥吾、ウォリス サイモン
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Antigorite grain boundary sliding accommodated by micro-cracking and dissolution-precipitation creep in subduction zone2022

    • Author(s)
      永冶 方敬、ウォリス サイモン
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 長崎変成岩三重メランジュにおける変形温度及び歪み速度の推定2022

    • Author(s)
      前原 誠也、安藤 亮輔、永冶 方敬、氏家 恒太郎、ウォリス サイモン、小山 雪乃丞
    • Organizer
      Japan Geosccience Union 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Microstructures and deformation temperature of carbonate mylonites in Shajigami shear zone at eastern margin of Abukuma Mountains, Northeastern Japan2021

    • Author(s)
      Hiroaki Yokoyama, Jun Muto, Hiroyuki Nagahama
    • Organizer
      EGU
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Deformation of simulated quartz-feldspar faults at the brittle-ductile transition zone2021

    • Author(s)
      Miho Furukawa, Berend A. Verberne, Jun Muto, Miki Takahashi, Hiroyuki Nagahama
    • Organizer
      JpGU
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 周防変成帯の泥質片岩の二段階成長ざくろ石が記録する変成履歴2021

    • Author(s)
      遠藤俊祐,伊藤 槙
    • Organizer
      日本地球惑星科学連合
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 愛媛県滑川地域・三波川帯のローソン石を含む石灰珪質片岩の成因2021

    • Author(s)
      栗原那知,遠藤俊祐
    • Organizer
      日本地質学会第127回学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石英動的再結晶組織を用いた応力推定手法の検討2021

    • Author(s)
      Yukinojo Koyma, Simon Wallis
    • Organizer
      変成岩などシンポジウム
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2024-08-08  

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