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Frictional and transport properties of the Chelungpu fault from shallow borehole data and their correlation with seismic behavior during the 1999 Chi-Chi earthquake

https://hiroshima.repo.nii.ac.jp/records/2007342
https://hiroshima.repo.nii.ac.jp/records/2007342
9de1f73b-a01b-400b-a58c-14f8aaf5c348
名前 / ファイル ライセンス アクション
JGeophysRes-SolidEarth_114_B01402.pdf JGeophysRes-SolidEarth_114_B01402.pdf (1011.1 KB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Frictional and transport properties of the Chelungpu fault from shallow borehole data and their correlation with seismic behavior during the 1999 Chi-Chi earthquake
言語 en
作成者 Tanikawa, Wataru

× Tanikawa, Wataru

en Tanikawa, Wataru

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Shimamoto, Toshihiko

× Shimamoto, Toshihiko

en Shimamoto, Toshihiko

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 Copyright (c) 2009 American Geophysical Union
主題
主題Scheme Other
主題 Friction coefficient
主題
主題Scheme Other
主題 permeability
主題
主題Scheme Other
主題 thermal pressurization
主題
主題Scheme NDC
主題 450
内容記述
内容記述 We carried out low- and high-velocity friction tests on fault rock samples from shallow boreholes on the Taiwan Chelungpu fault and measured their fluid transport properties under high pressure with the objective of explaining the different seismic behavior in northern and southern sections of the fault during the 1999 Chi-chi earthquake. Our results of low-velocity friction tests demonstrate that fault gouge from the southern section of the fault exhibits velocity-weakening frictional behavior, whereas gouge from the northern section exhibits velocity-strengthening friction. Friction in the northern gouge decreased strongly with increasing wetness, whereas friction in southern gouge samples was not affected by wetness. A rapid reduction of friction was observed immediately after the onset of slip in high-velocity friction tests. The results of high-velocity friction tests were similar for all fault gouge samples tested, though permeability in the northern fault zone was lower than that in the south. Numerical modeling indicated that thermal pressurization in the northern fault zone promoted stress reduction and fault instability during slip, whereas it did not in the south. This contrasting seismic behavior between north and south is caused mainly by differences in fluid transport properties of the slip zones. More efficient thermal pressurization in the north explains the large slip displacement there. The results of our low-velocity friction tests are consistent with nucleation of the Chi-Chi earthquake in the south and propagation of the rupture from south to north.
言語 en
出版者
出版者 American Geophysical Union
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ AO
出版タイプResource http://purl.org/coar/version/c_b1a7d7d4d402bcce
関連情報
識別子タイプ DOI
関連識別子 10.1029/2008JB005750
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1029/2008JB005750
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0148-–0227
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA10819743
開始ページ
開始ページ B01402
書誌情報 Journal of Geophysical Research - Solid Earth
Journal of Geophysical Research - Solid Earth

巻 114, p. B01402, 発行日 2009
旧ID 25978
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