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Behavior and mechanism of wet-sediment deformation -A study using pore size distribution, anisotropy of magnetic susceptibility and SEM image-

Research Project

Project/Area Number 08454143
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

SOH Wonn  KYUSHU UNIVERSITY Faculty of Science Associate Professor, 理学部, 助教授 (90183847)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥3,000,000 (Direct Cost: ¥3,000,000)
Keywordswet sediment deformation / fluidization / pore fluid / pore size / shear plane / ODP leg155 Amazon Fan / Misaki Formation / Shimanto Group Kayo Formation / 剪断 / 間隙径分布 / 帯磁率異方性(AMS) / 名護層 / 大村湾 / 水銀圧入式ポロシメータ / 面なし断層 / 間隙の再構築 / 高解像度堆積物密度 / X線CTスキャナー / 三浦層群三崎層
Research Abstract

Characteristic feature of wet sediment deformation is that strain and/or shear due to deformation does not extend to surface and/or interior of solid particle or mineral, and is absorbed within pore. Hence, wet sediment deformation has positive relationship to dewatering of pore water and it plays an important role in heat transfer and material budget in sedimentary succession. This study was carried out in order to better understand behavior of wet sediment deformation and its mechanism in relation to porosity change of the sediment. Results were shown as bellows :
1) In the study, I examined a) a series of the mudstones obtained from the Misaki Formation, Upper Miocene Miura Group ; the Ashigara Group, Quaternary arc-arc collision basin, central Japan ; b) whole round core sample of the Western mass transport deposit, Amazon Fan, ODP leg155 ; and c) shale but suffered wet sediment deformation, from the Kayo Formation, Shimanto Group, Okinawa. I measured porosity (with pore distributio … More n pattern by mercury injection-type porosimeter) , X-ray CAT scan image and anisotropy of magnetic susceptibility (AMS) .
2) AMS data from shear plane and tectonic melange (Misaki Formation, Kayo Formation) show that framework of particles and minerals in the sediment is significantly strained, and the largest pore is collapsed whereas the moderate size and small size pore is not broken. It is suggested that the deformation of shear zone and fault place from the deformation of the framework of particles, and extends to pore water dewatering as result of the deformation of the framework.
3) In the fluidized sediments (Misaki Formation, ODP sample) due to wet sediment deformation, the pore size tends to be concentrated within some extent ; the small and large pore was disappeared associated with fluidization. It suggests that the fluidization which deforms the framework was taken place by increase of pore fluid pressure.
Rrsults of this study tell us that the relation between wet sediment deformation and behavior of pore fluid shows the two processes : a) deformation was caused by increase of pore fluid pressure, e.g.due to injection of external pore fluid, and b) the framework was strained directly by external stress. Condition of physical property such as water content, permeability porosity and so on, is likely to control the process. Less

Report

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

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Soh, W.: "An arc-arc collision of the Ashigara Collision Zone,central Japan" The Island Arc.(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Stow, A.V.D.,: "Volcanicalastic sediments,process interaction and depositional setting of the Mio-Pliocene Miura Group,SE Japan." Sedimentary Geology. 115. 351-381 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Soh, W.: "Computed tomography scan analysis of Site 941 cores,Western Mass-Transport deposit,Amazon Fan." Proc.ODP Sci.Repts.155. 465-475 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 徐 垣: "Leg 155:地球環境変遷史の保管庫としての巨大海底扇状地の堀削-アマゾン海底扇状地-." 月刊地球.特集号. 19. 68-75 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hiscott, R.N: "Basin-Floor Fans in the North Sea:Sequence Stratigraphic Models vs.Sedimentary Facies:Discussion." Amer.Assoc.Petrol.Geol.81. 662-665 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 徐 垣: "アマゾン海底扇状地に見られる崩壊地形-ガスハイドレートの溶融と斜面崩壊-" 月刊地球. 203. 667-674 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 平 朝彦: "地殻の進化,地球惑星科学入門9" 岩波講座.岩波書店, 238 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Soh, W., Nakayama, K.and Kimura, T.: "An arc-arc collision of the Ashigara Collision Zone, central Japan" The Island Arc. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Stow, A.V.D., Taira, A., Ogawa, Y., Soh, W., Taniguchi, H.and Pickring, K.T.: "Volcaniclastic sediments, process interaction and depositional setting of the Mio-Pliocene Miura Group, SE Japan." Sedimentary Geology. 115. 351-381 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Soh, W.: "Computed tomography scan analysis of Site 941 cores, Western Mass-Transport deposit, Amazon Fan." Proc.ODP Sci.Repts College Station, TX(Ocean Drilling Program). 155. 465-475

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hiscott, R.N., Pickering, K.T., Bouma, A.H., Hand, B.M., Kneller, B.C., Postma, G.and Soh, W.: "Basin-Floor Fans in the North Sea ; Sequence Stratigraphic Models vs.Sedimentary Facies : Discussion." Amer.Assoc.Petrol.Geol.81. 662-665 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Soh,W.: "An arc-arc collision of the Ashigara Collision Zone,central Japan" The Island Arc. 印刷中

    • Related Report
      1997 Annual Research Report
  • [Publications] Soh,W.: "Computed tomography scan analysis of Site 941 cores,Western Mass-Transport deposit,Amazon Fan." Proc.ODP Sci.Rept.155. 465-475 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Stow,A.V.D.: "Volcaniclastic sediment prosess interaction and depositional Setting of the Mio-Pliocene Miura Group,SE Japan" Sedimentary Geology. 115. 351-381 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 徐 垣: "Leg155:地球環境変遷史の保管庫としての巨大海底扇状地の掘削" 月刊 地球. 特集号(19). 68-75 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hiscott,R.: "Basin-Floor Fans in the North Sea:Sequence Stratigraphic Models VS,Sedimentary Facies:Discussion" Amer.Assoc,Petrol,Geol.81. 662-665 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 平朝彦 他: "岩波講座・岩波書店" 地殻の進化,地球惑星科学入門 9, 283 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Soh,W: "Cumputed tomography scan analysis of Site 941 cores,Western Mass-Transport deposit,Amazon Fan." Proc.ODP Sci.Repts.155(印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hiscott,R.N.: "Basin-Floor Fans in the North Sea:Sequence Stratigraphic Models vs.Sedimentary Facies:Discussion." Amer.Assoc.Petrol.Geol.(印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 徐 垣: "アマゾン海底扇状地に見られる崩壊地形-ガスハイドレートの溶融と斜面崩壊-" 月刊地球. 203. 667-674 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Soh,W: "Geomorphology and Development of Tenryu Canyon." 96 KAIKO-TOKAI Cruise Rep.43-61 (1996)

    • Related Report
      1996 Annual Research Report

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

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