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Basic research for reconstruction of gravelly turbidite models

Research Project

Project/Area Number 16K05573
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geology
Research InstitutionChiba University

Principal Investigator

Ito Makoto  千葉大学, 大学院理学研究院, 教授 (10201930)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords礫質重力流堆積物 / 堆積相モデル / タービダイト / 粗粒セディメントウェーブ / ベッドフォーム / 海底谷 / 海底チャネル / 3次元デューン / 深海底 / 礫質タービダイト / バックセット層理 / 堆積相 / 礫質セディメントウェーブ堆積物 / 重力流 / 海底扇状地チャネル / 再堆積性礫岩 / 礫質ベッドフォーム / トラクションカーペット
Outline of Final Research Achievements

This study intends to clarify formation processes of conglomerates and pebbly sandstones in deepwater successions in terms of comportment deposits of coarse-grained bedforms on the basis of detailed lithofacies analyses in large outcrop belts. In particular, this study tried to revisit standard models on the formation of different types of lithofacies models of deepwater conglomerates and pebbly sandstones, which have been interpreted to be the results of deceleration and/or transformation of sediment gravity flows in downflow directions, with a new lithofacies mode. The major outcomes of the present study are that component lithofacies of some standard models can be interpreted to have formed as component deposits of downflow-migrating gravelly bedforms and different types of vertical lithofacies successions are interpreted to have formed as a result of migration and aggradation of different parts of downflow-migrating gravelly bedforms.

Academic Significance and Societal Importance of the Research Achievements

陸棚以深の深海底における砕屑粒子の移動と堆積に関しては,実測が難しいことや実測例が限られていることから,地層に記録された情報に基づいた粗粒砕屑粒子の堆積作用のモデル化が行われている。特に,礫岩や礫質砂岩などの形成に関しては,異なったタイプの堆積相の形成が,主に重力流の減衰や変換に基づいてモデル化されている。本研究は,異なったタイプの堆積相が個別にそれぞれ異なった水理条件で形成されるのではなく,礫質ベッドフォームの構成要素としてまとまって形成され可能性を明らかにした。この成果は,地球表層部における物質移動を詳しく理解する上で,新たなプロセスの可能性を提供するものである。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (16 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (12 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Book (1 results)

  • [Journal Article] Lithofacies architecture of gravel-wave deposits: Insights into the origins of coarse-grained gravity-flow deposits2019

    • Author(s)
      Ito, M.
    • Journal Title

      Sedimentary Geology

      Volume: 382 Pages: 36-46

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relationships between discharge parameters and cross-sectional channel dimensions of rivers in an active margin influenced by tropical climate.2018

    • Author(s)
      Adhiperdana B. G., Hendarmawan, Shibata K. and Ito M.
    • Journal Title

      Catena

      Volume: 171 Pages: 645-680

    • DOI

      10.1016/j.catena.2018.07.008

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quantitative reconstruction of cross-sectional dimensions and hydrological parameters of gravelly fluvial chyannels developed in a forearc basin setting under a temperate climatic condition, central Japan2018

    • Author(s)
      Shibata, K., Adhiperdana, B.G., and Ito, M.
    • Journal Title

      Sedimentary Geology

      Volume: 362 Pages: 69-82

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 粗粒セディメントウェーブの形態的特徴:地層記録と現世ベッドフォームの比較検討2018

    • Author(s)
      伊藤慎・島野恭史
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Channel-lobe transition zone evolution and architecture2018

    • Author(s)
      Brooks, H.L., Ito, M., Hodgson, D.M., Brunt, R.L., Flint, S.S., Hofstra, M., Peaka, J.
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 房総半島更新統上総層群基底の黒滝層:粗粒セディメントウェーブの発達え特徴づけられる海底谷埋積物2018

    • Author(s)
      浅見翔太郎・伊藤慎
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 三浦半島南帯中心統-鮮新統三崎層・初声層のトラクション構造の形成プロセス2018

    • Author(s)
      宮澤喜大・峠雄斗・柴田健一郎・伊藤慎
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 下北半島中部更新統田名部層の大型水成デューン堆積物の形成過程2018

    • Author(s)
      本宮圭悟・伊藤慎・鎌田耕太郎
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 三浦半島第三系三崎層の火山砕屑性インジェクタイトの形態的・岩相的特徴と形成過程2018

    • Author(s)
      大木耀成・柴田健一郎・伊藤慎
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 房総半島中部更新統万田野層中部を構成する塩水湿地-浅海泥底堆積物の堆積形態と堆積相の特徴2018

    • Author(s)
      島野恭史・高岡進一・伊藤慎
    • Organizer
      日本地質学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Turbidite models revisited2017

    • Author(s)
      Makoto Ito
    • Organizer
      JpGu-AGU Joint Meeting 2017
    • Place of Presentation
      幕張メッセ(千葉県・千葉市)
    • Year and Date
      2017-05-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Boumaモデルの平行ラミナシルト岩 (Td)の成因2017

    • Author(s)
      山田立輝・小田陽平・青栁裕香・伊藤慎
    • Organizer
      日本堆積学会
    • Place of Presentation
      信州大学理学部(長野県・松本市)
    • Year and Date
      2017-03-26
    • Related Report
      2016 Research-status Report
  • [Presentation] Turbidite models revisited2017

    • Author(s)
      Makoto Ito
    • Organizer
      日本地球惑星連合-American Geophysical Union 合同学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 三浦半島新第三系三崎層の火山砕屑性インジェクタイトの形成過程2017

    • Author(s)
      大木耀成・柴田健一郎・伊藤慎
    • Organizer
      日本地質学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 房総半島下部更新統勝浦層に認められる海底堆積物の剥離をともなうハイブリッド重力流堆積物の形成過程2016

    • Author(s)
      伊藤慎・菅沼凌
    • Organizer
      日本地質学会
    • Place of Presentation
      日本大学文理学部(東京都・世田谷区)
    • Year and Date
      2016-09-10
    • Related Report
      2016 Research-status Report
  • [Book] 固体地球の事典2017

    • Author(s)
      伊藤慎(堆積岩と堆積過程を分担執筆)
    • Total Pages
      250
    • Publisher
      朝倉書店
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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