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Sedimentary structures due to upper-flow-regime sediment-gravity-flow and a depositional model

Research Project

Project/Area Number 18H01293
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17030:Human geosciences-related
Research InstitutionOsaka Institute of Technology

Principal Investigator

横川 美和  大阪工業大学, 情報科学部, 教授 (30240188)

Co-Investigator(Kenkyū-buntansha) 石原 与四郎  福岡大学, 理学部, 助教 (80368985)
泉 典洋  北海道大学, 工学研究院, 教授 (10260530)
岩崎 理樹  北海道大学, 工学研究院, 准教授 (70727619)
中嶋 健  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, 研究グループ長 (20357627)
成瀬 元  京都大学, 理学研究科, 准教授 (40362438)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Granted (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2020: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Keywords混濁流 / 高流砂階ベッドフォーム / サイクリックステップ / 堆積構造 / 堆積モデル
Outline of Annual Research Achievements

混濁流は地球表層で最も多くの堆積物輸送を担う現象であり,過去の混濁流によって形成された海底扇状地は石油や天然ガスの良好な貯留岩として注目されている.また,混濁流の堆積物は過去の自然災害の規模や頻度を推定する鍵になる.混濁流は内部フルード数が高くなりやすいため,高流砂階(フルード数>1)の微地形を形成しながら堆積するはずだが,それによってどのような堆積構造が地層に残されるのかはわかっていない.本研究は[1]高流砂階の混濁流によって形成される微地形・内部堆積構造と水理条件との関係を水路実験によって体系的に明らかにすること,[2]混濁流による堆積体形成の堆積モデルを構築することを目的とする.
2021年度は2019年度に中断した後の復活分について,研究を行なった.研究実績の概要は以下の通りである.(1)大阪工業大学の水路でこれまでよりも流量の多いサージ的混濁流により,サイクリックステップを形成する実験を行った.また,実験の結果得られた堆積物の粒度分析を行った.(2)混濁流によるサイクリックステップの形成についての数学モデルを作成し,現地観測結果を良好に説明する比較検証結果が得られている.(3)数値シミュレーションでは,レイノルズ平均型の数値計算モデルを用いて様々な混濁流条件での数値計算を行った.また,新たに,混濁流の平面2次元浅水流4方程式モデルを開発し,サイクリックステップ形成時の粒度分別についてもシミュレーションを行なった.(4) 地層の調査は主に,宮崎層群に見られるセディメントウェーブ堆積物の詳細な調査を行った.(5)リサーチミーティングを通じて,意見交換を行った.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

進捗状況は以下の通り(番号は6「研究実績の概要」と対応).(1)大工大の水路実験では,中断前に行った実験の約5倍の流量でのサージ的混濁流によってサイクリックステップが形成された.堆積物表面の流れ方向および堆積物の鉛直方向について詳細な粒度分析を行なった結果,下流へ粗粒化する傾向が見られた.下流粗粒化のメカニズムについて検討中である.(2) 混濁流の海底面近傍の薄い層では平衡状態が仮定できることを用いて,サイクリックステップの形成理論を構築し,サイクリックステップの形状および波長を理論的に導いた.現在,様々な現地観測結果を収集し比較検討を行うことで,モデルの妥当性を検証中である.(3)開発した鉛直二次元数値計算モデルを,種々の混濁流に関する室内実験に適用し,実験で測定された流速や浮遊砂濃度を妥当な範囲で再現できることを確認した.このモデルを現地スケールの条件へ適用し,サイクリックステップの形成条件に関して検討した.また,新たに開発した平面2次元浅水流4方程式モデルでは,混合粒径の砕屑物輸送を考慮し,サイクリックステップ形成時に上流側斜面と下流側斜面で粒度分別が起こりうることを再現できた.(4)宮崎層群のセディメントウェーブの単層の層厚変化についてより詳細な情報を得るため,レーザースキャナおよびフォトグラメトリーによるオルソ画像を作成した結果,高精度の変化を捉えることができるようになった.一方,本研究で,海底堆積物の事例として扱っている富山深海長谷の発達過程とその最初期の混濁流堆積物についても,混濁流発生の背景と関連して考察を行なった.(5)研究分担者・研究協力者も含めて,オンラインでリサーチミーティングを行い,意見交換を行なった.

Strategy for Future Research Activity

今後の推進方策は以下の通り(番号は6「研究実績の概要」と対応).
(1)水路実験:サイクリックステップを含む高流砂階のベッドフォームの混濁流による形成条件と堆積構造についてさらに実験を行う.水路実験は主に大阪工業大学で行う.粒子径測定装置CAMSIZER X2を用いた粒度分析も行う
(2)数値モデル作成:実験結果に基づき,混濁流による高流砂階ベッドフォーム形成についての数学・水理モデルの作成を進める.これについては主に研究分担者の泉,成瀬が行う.
(3)数値シミュレーション:研究分担者の岩崎が開発してきたレイノルズ平均型の方程式を用いた流れモデルによる数値シミュレーション,および,研究分担者の成瀬が開発した平面2次元浅水流4方程式モデルについて,シミュレーション結果と水路実験の結果を照合し,更なるモデルのブラッシュアップを図る.
(4)地層調査:宮崎層群の堆積構造の分布のほか,チャネルからローブへの地形変化の影響などとの関係をまとめる.野外調査は主に研究分担者の石原が行う.
(5)混濁流の現地観測,現世の海底地形,音波探査記録との比較:随時,水路実験の結果と既存の海底地形・音波探査記録データとの比較を行う.これは主に,研究分担者の中嶋と横川が研究協力者の高野,大野, Hughes Clarke, Talling, Xu, Kneller,Southampton UniversityのSophie Hage, ニュージーランド国立水・大気圏研究所のJoshu Mountjoy,Yanwei Zhang博士(中国同済大学)らの協力を得て行う.

Report

(3 results)
  • 2021 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(50 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (5 results) Journal Article (14 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 13 results,  Open Access: 3 results) Presentation (30 results) (of which Int'l Joint Research: 21 results,  Invited: 2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Southampton Univ./Leeds Univ.(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Univ. Illinois(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] NIWA(ニュージーランド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Aberdeen/University of Hull/Durham University(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Illinois(米国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] High-resolution upper Maastrichtian carbon isotope stratigraphy of terrestrial organic matter from northern Japan2022

    • Author(s)
      Nifuku, K., Naruse, H., & Ikehara, M.
    • Journal Title

      Newsletters on Stratigraphy

      Volume: 55 Pages: 137-157

    • DOI

      10.1127/nos/2021/0652

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 白保竿根田原洞穴遺跡の旧石器人骨の空間分布と鉄・マンガン酸化物による着色状況から推定されるその埋没過程2022

    • Author(s)
      石原与四郎・伊藤百花・土肥直美・片桐千亜紀・吉村和久
    • Journal Title

      Anthropological Science (Japanese Series)

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inverse modeling of turbidity currents using an artificial neural network approach: verification for field application.2021

    • Author(s)
      Naruse, H., & Nakao, K.
    • Journal Title

      Earth Surface Dynamics

      Volume: 9 Pages: 1091-1109

    • DOI

      10.5194/esurf-9-1091-2021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inverse analysis of experimental scale turbidity currents using deep learning neural networks2021

    • Author(s)
      Cai, Z., & Naruse, H.
    • Journal Title

      Journal of Geophysical Research: Earth Surface

      Volume: 126

    • DOI

      10.1029/2021jf006276

    • NAID

      120007192874

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reconstruction of flow conditions from 2004 Indian Ocean tsunami deposits at the Phra Thong island using a deep neural network inverse model2021

    • Author(s)
      Mitra Rimali、Naruse Hajime、Fujino Shigehiro
    • Journal Title

      Natural Hazards and Earth System Sciences

      Volume: 21 Pages: 1667-1683

    • DOI

      10.5194/nhess-21-1667-2021

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transition from a transgressive to a regressive river-mouth sediment body in Tokyo Bay during the early Holocene: Sedimentary facies, geometry, and stacking pattern.2021

    • Author(s)
      Tanabe, S., Nakashima, R., Ishihara, Y.
    • Journal Title

      Sedimentary Geology

      Volume: 428

    • DOI

      10.1016/j.sedgeo.2021.106059

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Distribution of Holocene Marine Mud and Its Relation to Damage from the 1923 Earthquake Disaster in the Tokyo Metropolitan Area, Japan.2021

    • Author(s)
      Tanabe, S., Ishihara, Y., Nakanishi, T., Stafleu, J. and Busschers, F. S.
    • Journal Title

      geosciences

      Volume: 11

    • DOI

      10.3390/geosciences11070272

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 湖成年縞中の細粒イベント堆積物2021

    • Author(s)
      石原与四郎・佐々木華
    • Journal Title

      号外 月刊地球

      Volume: 70 Pages: 100-105

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Formation of undulating topography and gravel beds at the bases of incised valleys: Last Glacial Maximum examples beneath the lowlands facing Tokyo Bay2021

    • Author(s)
      Tanabe, S. and Ishihara, Y.
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8

    • DOI

      10.1186/s40645-021-00411-0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Geologic structures and basin formation tectonics in and around Toyama Trough, the Sea of Japan2021

    • Author(s)
      Nakajima Takeshi、Yoshikawa Kosuke、Okitsu Osamu
    • Journal Title

      Jour. Geol. Soc. Japan

      Volume: 127 Issue: 3 Pages: 165-188

    • DOI

      10.5575/geosoc.2021.0003

    • NAID

      130008059950

    • ISSN
      0016-7630, 1349-9963
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The grade index model as a rationale for autogenic nonequilibrium responses of deltaic clinoform to relative sea‐level rise2020

    • Author(s)
      Wang Junhui、Naruse Hajime、Muto Tetsuji
    • Journal Title

      Basin Research

      Volume: 32 Pages: 378-387

    • DOI

      10.1111/bre.12418

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Collisional bending of the western Paleo Kuril Arc deduced from paleomagnetic analysis and U-Pb age determination2019

    • Author(s)
      Katagiri, T., Naruse, H. Ishikawa, N. and Hirata, T.
    • Journal Title

      Island Arc

      Volume: 999 Pages: 999-999

    • NAID

      120006810865

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Morphodynamics of River Deltas in Response to Different Basin Water Depths: An Experimental Examination of the Grade Index Model2019

    • Author(s)
      Wang Junhui、Muto Tetsuji、Urata Kento、Sato Toshihiko、Naruse Hajime
    • Journal Title

      Geophysical Research Letters

      Volume: 46 Pages: 5265-5273

    • DOI

      10.1029/2019gl082483

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The role of saltwater in continental shelf formation: seaward-migrating clinoform2019

    • Author(s)
      Toshiki Iwasaki and Gary Parker
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America

      Volume: 999 Pages: 999-999

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] サージ的混濁流により実験水路に形成されたサイクリックステップの粒度分布2021

    • Author(s)
      横川美和ほか
    • Organizer
      日本堆積学会2021年新潟オンライン大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Reconstruction of crustal uplift history in island arcs by inversion of river longitudinal profile: consideration of basement rock strength and sea-level change2021

    • Author(s)
      成瀬 元
    • Organizer
      AGU Fall Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 岩盤河川縦断形状に基づく日本列島隆起速度のベイズ推定2021

    • Author(s)
      成瀬 元
    • Organizer
      日本地質学会第128年学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 復元の科学としての堆積学2021

    • Author(s)
      成瀬 元
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Grain size segregation on cyclic steps formed by turbidity currents2021

    • Author(s)
      成瀬 元
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 石垣島東海岸沿いの洞窟内に認められる津波堆積物2021

    • Author(s)
      石原与四郎,北原美優,沖田優香,島袋綾野,成瀬元,片桐千亜紀,小野林太郎,吉村和久
    • Organizer
      Japan Geoscience Union Meeting 2021online
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石垣島東海岸沿いの洞窟と津波堆積物2021

    • Author(s)
      石原与四郎・相場浩輔・北原美優・沖田優香・吉村和久
    • Organizer
      日本洞窟学会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石垣島の洞窟で見られる津波堆積物の堆積相2021

    • Author(s)
      沖田優香・北原美優・石原与四郎・吉村和久
    • Organizer
      日本洞窟学会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石垣島カラダギ洞穴に認められる津波堆積物の特徴2021

    • Author(s)
      石原与四郎ほか
    • Organizer
      日本堆積学会2021(Online)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Sediment wave development in a flow constrained area of the Neogene forearc basin slope2021

    • Author(s)
      Yoshiro Ishihara, Shiori Iwao, Yuri Onishi, Miwa Yokokawa, 35th IAS
    • Organizer
      Meeting of Sedimentology Virtual Meeting: Prague, Czech Republic (Online)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent advances on bedform research and application: Process-based to machine learning2021

    • Author(s)
      Giri, S., Shakya, A., Nabi, M., Naqshband, S., Iwasaki, T., Yamaguchi, S., Froehlich, D.C., Bhattacharya, B. and Shimizu, Y.
    • Organizer
      EGU General Assembly Conference 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Flume experiment on sedimentary structures and grain size distribution of cyclic steps formed by surge-type turbidity currents2019

    • Author(s)
      M. Yokokawa, K. Fujita, I. Mori, R. Fernandez, M. Czapiga, J. Berens, J. Kwang, K. Naito, G. Parker, N. Izumi, H. Naruse
    • Organizer
      Japan Geoscience Union Annual Meeting 2019 (JpGU2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] サージ的混濁流とそのベッドフォームの粒度分布:水路実験2019

    • Author(s)
      藤田和典・横川美和・森 勇・八木 崇・吉田壮葵・水谷信彰・Roberto Fernandez・Matt Czapiga・John Berens・Jeffrey Kwang・内藤健介・Gary Parker・泉 典洋・成瀬 元
    • Organizer
      日本地質学会2019年山口大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 何がタービダイトを作るのか:現地観測と露頭の間を埋めるには2019

    • Author(s)
      成瀬 元
    • Organizer
      日本地質学会2019年山口大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Inverse analysis of turbidity currents using two dimensional shallow water model2019

    • Author(s)
      Naruse, H.
    • Organizer
      Japan Geoscience Union Annual Meeting 2019 (JpGU2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 潮の名残り;混濁流は潮汐に影響されるか?2019

    • Author(s)
      成瀬 元,Robert Dorrell
    • Organizer
      日本堆積学会2019大阪大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Autogenic subaqueous mechanism for continental shelf formation associated with clinoform migration: dissolved salt, gravity-driven and wave-supported turbidity current2019

    • Author(s)
      Toshiki Iwasaki and Gary Parker
    • Organizer
      2nd Asian Sedimentary Continuum
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cyclic steps formed by long-runout turbidity currents2019

    • Author(s)
      Zhuyuan Wu, and Norihiro Izumi
    • Organizer
      Japan Geoscience Union Annual Meeting 2019 (JpGU2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Features of cyclic steps formed due to surge-type turbidity currents: morphology of the steps and grain size distribution2018

    • Author(s)
      Kazunori Fujita, Isamu Mori, Miwa Yokokawa, Roberto Fernandez, Matt Czapiga, John Berens, Jeffrey Kwang, Kensuke Naito, Gary Parker, Norihiro Izumi, Hajime Naruse
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Transition from traction carpet deposits to massive structureless unit at the basal part of a turbidite bed2018

    • Author(s)
      Yoshiro Ishihara, Yuri Onishi, Keisuke Tsuda, Miwa Yokokawa
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A new numerical model of turbidity currents considering the vertical flow structure: Development of the two-layer depth-averaged model based on numerical experiments using 2-D RANS model2018

    • Author(s)
      Koji Ohata, Hajime Naruse
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inverse analysis of turbidity current by deep-learning neural network: application to outcrops2018

    • Author(s)
      Hajime Naruse, Sojiro Fukuda
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical simulations of cyclic steps formed by turbidity currents2018

    • Author(s)
      Toshiki Iwasaki
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bed instability generated by turbidity currents2018

    • Author(s)
      Norihiro Izumi, Sytharith Pen, Gary Parker
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Variation of ichnodiversity and ichnodisparity in submarine channel-levee system: an example from the Oligocene Nichinan Group, southwest Japan2018

    • Author(s)
      Kazuki Kikuchi and Hajime Naruse
    • Organizer
      Japan Geoscience Union Annual Meeting 2018 (JpGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Morphology, sedimentary structures and grain size distribution of cyclic steps formed by surge-type turbidity currents in an experimental flume2018

    • Author(s)
      Miwa Yokokawa, Kazunori Fujita, Isamu Mori, Roberto Fernandez, Matt Czapiga, John Berens, Jeffrey Kwang, Kensuke Naito, Gary Parker, Norihiro Izumi, Hajime Naruse
    • Organizer
      4th International Canyon Symposium (INCISE2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Formation of cyclic steps due to surge-type turbidity currents: flume experiments and numerical simulation2018

    • Author(s)
      Miwa Yokokawa, Toshiki Iwasaki,Daiki Shozakai, Junpei Yamano, Masatomo Miyai
    • Organizer
      American Geophysical Union Fall Meeting 2018 (AGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Autogenic subaqueous mechanism for continental shelf formation associated with clinoform migration: dissolved salt, gravity-driven and wave-supported turbidity current2018

    • Author(s)
      Iwasaki, T. and Parker, G.
    • Organizer
      American Geophysical Union Fall Meeting 2018 (AGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thickness of quasi-equilibrium basal driving layer of turbidity current2018

    • Author(s)
      Norihiro Izumi, Gary Parker and Rossella Luchi
    • Organizer
      American Geophysical Union Fall Meeting 2018 (AGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inverse modeling of turbidity currents by artificial neural network: application to ancient turbidites in the Otadai Formation, Boso Peninsula, Japan2018

    • Author(s)
      Hajime Naruse and Sojiro Fukuda
    • Organizer
      American Geophysical Union Fall Meeting 2018 (AGU2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Funded Workshop] Processes of turbidity currents and related deposits2018

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-12-28  

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