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Tectonice Geomorpholy of the coastal area along the Nansei-Shoto islands based on the detailed digital elevation data

Research Project

Project/Area Number 19H01374
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 04010:Geography-related
Research InstitutionHiroshima University

Principal Investigator

Goto Hideaki  広島大学, 人間社会科学研究科(文), 准教授 (40323183)

Co-Investigator(Kenkyū-buntansha) 杉戸 信彦  法政大学, 人間環境学部, 教授 (50437076)
隈元 崇  岡山大学, 自然科学学域, 教授 (60285096)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywords海成段丘 / 海底段丘 / 数値標高モデル / 変動地形 / 活断層 / 海底地形 / 数値地形モデル
Outline of Research at the Start

本研究は、傾動する海成段丘が多数分布する南西諸島を対象に、主に沿岸海域の地形・地質調査を行い、陸海を統合した高精細な沿岸地形図・ステレオ画像を作成し、それらの判読と資料の解析を通して、最終間氷期以降の沿岸域の地殻変動様式の解明を目的とする。本研究により、南西諸島の島棚に沿って地形学的時間スケールでは広域的に圧縮歪みが蓄積されていることを示したい。

Outline of Final Research Achievements

Late Quaternary tectonic deformation of coastal areas is usually examined using height distribution of paleo-shorelines observed on marine terraces. Shallow-sea features, such as cliffs and terraces, can provide essential information regarding topographical evolution and crustal movement, since the development of submarine topography above -120 m has become relevant for sea-level changes during the last glacial period, including the Last Glacial Maximum. Since the 2000s, digital elevation models surveyed by multi-beam sound systems have been acquired, and tectonic geomorphological studies in coastal areas have substantially progressed. We focused on the widespread shallow submarine terraces exhibited indistinct marine terraces in the middle part of the Nanseishoto Islands. We examined height differences between paleo-shore lines and displacements of the submarine terrace based on the detailed maps.

Academic Significance and Societal Importance of the Research Achievements

本研究は,これまで地図の乏しい沿岸海域に注目し,陸海を統合した高精細な地形図・ステレオ画像を作成し,それらを読み解くものである。革新的に詳しい海底地形が調査できるマルチビーム測深によって得られた海底地形データを用いており,地殻変動の乏しい場所や激しい場所で共通性や違いを明らかにした。南西諸島中部では,巨大地震が発生しないと考えられているが,地形学的な時間スケールでは島棚に直交する圧縮歪みが蓄積されていると考えられ,これまでの見解の修正を迫る結果となった。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019

All Journal Article (6 results) (of which Open Access: 5 results,  Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Acquisition and Utilization of Digital Topographic Data in Active Fault Topography Survey: Case of Kawane Fault Distributed Along the Eastern Margin of the Takanawa Mountain Range, Southwest Japan2022

    • Author(s)
      山中 蛍、後藤 秀昭
    • Journal Title

      内海文化研究紀要

      Volume: 50 Issue: 50 Pages: 13-24

    • DOI

      10.15027/52332

    • ISSN
      0386-3182
    • URL

      https://hiroshima.repo.nii.ac.jp/records/2025331

    • Year and Date
      2022-03-31
    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Tectonic Geomorphology in the Southeastern Part of the Kyoto Basin and the Fushimi Harbor Constructed by Hideyoshi Toyotomi in the Azuchi-Momoyama Period2022

    • Author(s)
      後藤 秀昭
    • Journal Title

      内海文化研究紀要

      Volume: 50 Issue: 50 Pages: 1-12

    • DOI

      10.15027/52331

    • ISSN
      0386-3182
    • URL

      https://hiroshima.repo.nii.ac.jp/records/2025329

    • Year and Date
      2022-03-31
    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Development of Submarine Geomorphology Based on Analysis of Submarine Terraces around the Kandamisaki-oki Fault off the Coast of San-in Region2021

    • Author(s)
      後藤 秀昭
    • Journal Title

      広島大学文学部論集

      Volume: 81 Pages: 19-38

    • DOI

      10.15027/51678

    • NAID

      120007185872

    • ISSN
      2436-410X
    • URL

      https://hiroshima.repo.nii.ac.jp/records/2034323

    • Year and Date
      2021-12-25
    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] DEM を用いた活断層研究の新展開2021

    • Author(s)
      後藤秀昭
    • Journal Title

      地質と調査

      Volume: 157 Pages: 11-16

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] ubmarine terraces reveal Late Quaternary tectonic deformation in the intermediate zone between the island shelf and rift zone of the middle part of the Nanseishoto Islands, southwest Japan2021

    • Author(s)
      Goto, Hideaki
    • Journal Title

      EARTH PLANETS AND SPACE

      Volume: 73 Issue: 1 Pages: 1-12

    • DOI

      10.1186/s40623-021-01395-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 活断層図の作成と防災活用の課題2019

    • Author(s)
      後藤秀昭
    • Journal Title

      月刊地理

      Volume: 64-8 Pages: 54-61

    • Related Report
      2019 Annual Research Report
  • [Presentation] 山陰地方西部沖に分布する海底段丘と発達過程2022

    • Author(s)
      後藤秀昭
    • Organizer
      日本地理学会2022年春季学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 海底段丘と海成段丘から推定される南西諸島中部周辺の海底活断層の変位様式2021

    • Author(s)
      後藤秀昭
    • Organizer
      地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 南西諸島中部の島棚に分布する海底段丘からみた地殻変動2020

    • Author(s)
      後藤秀昭
    • Organizer
      日本地理学会秋季学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 浅海底に分布する海底段丘の区分と地殻変動の検討─沖縄島北西沖と伊平屋伊是名諸島周辺を対象に─2020

    • Author(s)
      後藤秀昭
    • Organizer
      日本地理学会2020年春季学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 浅海底に分布する海底段丘の変動地形学的分析─沖縄島北西沖の伊平屋島 で認められる傾動運動─2019

    • Author(s)
      後藤秀昭
    • Organizer
      日本活断層学会2019年学術大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Seafloor Stereo Map of Coastal Areas for Geomorphological Studies2019

    • Author(s)
      Hideaki Goto
    • Organizer
      29th International Cartographic Conference (ICC2019 TOKYO)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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