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Seimic risk assesment of active reverse faults based on morphological analysis of Holocene surface faulting

Research Project

Project/Area Number 08680191
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 自然地理学
Research InstitutionTSURUOKA NATIONAL COLLEGE OF TECHNOLOGY

Principal Investigator

SAWA Hiroshi  TSURUOKA NATIONAL COLLEGE OF THECNOLOGY,GENERAL EDUCATION,LECTURER, 一般科目, 講師 (80241222)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsactive fault / seimic risk assesment / Holocene surface faulting / flexural scarp / reverse fault / interpretation of large-scale air photographs / morphological analysis / 断層変位地形
Research Abstract

Holocene surface faultings are newly recognized in the eastern boundary faults of the Shonai Plain, the western boundary faults of the Yamagata Basin and the eastern boundary faults of the Kamishiro Basin along the Northem part of Itoigawa-Shizuoka Tectonic Line, based on the interpretation of large-scale air photographs and the field survey. Holocene and late Pleistocene deformation is demonstrated along theses faults, and the degree of faults activity, based on vertical displacement, is class A to B (slip rate ; 0.1-1.5m/ka).
Holocen flexural scarps of one to two meters or less in relative height is characteristic deformed feature along these faults, implying that this is resulted from low angle reverse faulting.
Holocene flexural scarps are situated one hundred meters to one kilometer off from the piedmont line, which indicates that Holocene reverse faulting migrates to the basin. The fold systems well develop in the study areas, which shows that the folding is related to the late Quaternary faulting in the unconsolidated basin deposits.
In conclusion, (1) active reverse faults are associated with Holocene flexural scaps which have very gentle slope, (2) the interpretation of large-scale air photographs is helpful to the recognition of active reverse faults which have high seismic risk.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 澤 祥: "試錐調査からみた庄内平野東縁活断層系の第四紀後期の活動1.観音寺断層:関地区" 日本第四紀学会講演要旨集. 26. 104-105 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 澤 祥: "米軍撮影空中写真から作成した大縮尺地形図に表現された松山断層(庄内平野東縁活断層系)の新期断層変位" 日本地理学会予稿集. 50. 236-237 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 澤 祥: "庄内平野東縁の活断層トレンチ調査とその意義-松山断層と観音寺断層" 日本地震学会講演予稿集1997年度秋季大会. A33 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 澤 祥: "庄内平野東縁部の活断層詳細図と断層活動" 地球惑星科学関連学会1998年合同大会予稿集. Sf02252253s 6 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] SAWA Hiroshi: "Late Quatermary vertical movement along Kan-nonji faults (eastern boundary fault of the Shonai Plain), Northem Japan, based on drilling" Programs and abstracts for annual meeting of Japan Association of Quatemary Research. 26. 104-105 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] SAWA Hiroshi: "Holocene surface faulting in the Matsuyama fault (eastem boundary faults of the Shonai Plain), based on the interpretation of large-scale map" Proceeding of the General Meeting of the Association of Japanese Geographers. 50. 236-237 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] SAWA Hiroshi: "Trenching survey on eastern boundary fault of the Shonal Plain, Northern Japan, and its paleoseismological significance" Abstracts of 1997 Japan Earth and Planetary Science Joint Meeting. A33. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] SAWA Hiroshi: "Precise location and fault activity of the eastern boundary faults in the Shonal Plain, Northeast Japan" Abstracts of 1998 Japan Earth and planetary Science Joint Meeting. Sf02252253s6. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 澤 祥: "試錐調査からみた庄内平野東縁活断層系の第四紀後期の活動1.観音寺断層:関地区" 日本第四紀学会講演要旨集. 26. 104-105 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤 祥: "米軍撮影空中写真から作成した大縮尺地形図に表現された松山断層(庄内平野東縁活断層系)の新期断層変位" 日本地理学会予稿集. 50. 236-237 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤 祥: "庄内平野東縁の活断層トレンチ調査とその意義-松山断層と観音寺断層-" 日本地震学会講演予稿集1997年度秋季大会. A33 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤 祥: "庄内平野東縁部の活断層詳細図と断層活動" 地球惑星科学関連学会1998年合同大会予稿集. Sf 02252253s 6 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 澤,祥: "試錐調査からみた庄内平野東縁活断層系の第四紀後期の活動1.観音寺断層:関地区" 日本第四紀学会講演要旨集. 26. 104-105 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 澤,祥: "米軍撮影空中写真から作成した大縮尺地形図に表現された松山断層(庄内平野東縁活断層系)の新規断層変位" 日本地理学会予稿集. 50. 236-237 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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