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On the transient response of serpentine (antigorite) gouge to stepwise changes in slip velocity under high-temperature conditions

https://hiroshima.repo.nii.ac.jp/records/2007344
https://hiroshima.repo.nii.ac.jp/records/2007344
56e973d1-5f8c-4e19-8889-f41df68833c3
名前 / ファイル ライセンス アクション
JGeophysRes-SolidEarth_116_B10405.pdf JGeophysRes-SolidEarth_116_B10405.pdf (4.7 MB)
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 On the transient response of serpentine (antigorite) gouge to stepwise changes in slip velocity under high-temperature conditions
言語 en
作成者 Takahashi, Miki

× Takahashi, Miki

en Takahashi, Miki

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Uehara, Shin-Ichi

× Uehara, Shin-Ichi

en Uehara, Shin-Ichi

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Mizoguchi, Kazuo

× Mizoguchi, Kazuo

en Mizoguchi, Kazuo

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Shimizu, Ichiko

× Shimizu, Ichiko

en Shimizu, Ichiko

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Okazaki, Keishi

× Okazaki, Keishi

en Okazaki, Keishi

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Masuda, Koji

× Masuda, Koji

en Masuda, Koji

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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 (c) 2011 by the American Geophysical Union.
主題
主題Scheme NDC
主題 450
内容記述
内容記述 Shear-sliding tests were conducted on serpentine (antigorite) gouge to understand the rheology of serpentine-bearing faults. The experiments were carried out using a constant confining pressure (100 MPa), a constant pore water pressure (30 MPa), and a range of temperatures (from room temperature to 600 degrees C). The transient response in frictional behavior following stepwise changes in the slip velocity were documented at each temperature. Slip rates varied between 0.0115 and 11.5 mu m/s. Both the general level of frictional strength and the transient responses changed drastically at around 450 degrees C. As the temperature increased from 400 degrees C to 450 degrees C, the strength of antigorite rose sharply. The transient response also indicated a change in the mode of deformation from flow-type behavior at temperatures below 400 degrees C to frictional behavior (stick-slip) at temperatures above 450 degrees C-500 degrees C. Although only a limited volume of serpentine was involved in the dehydration reaction, X-ray diffraction analyses and scanning electron microscopy observations showed that forsterite had nucleated in the experimental products at the higher temperatures that were associated with frictional behavior. Submicron-sized, streaky forsterite masses in shear-localized zones may be evidence of shear-induced dehydration that caused strengthening and embrittlement of the gouge. Although antigorite rheology is complicated, the subsequent change in friction coefficient per order-of-magnitude change in sliding velocity increased with both increasing temperature and decreasing velocity, implying that a possible flow mechanism of intragranular deformation became activated.
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 VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1029/2010JB008062
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1029/2010JB008062
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 AA00698904
開始ページ
開始ページ B10405
書誌情報 Journal of Geophysical Research-Solid Earth
Journal of Geophysical Research-Solid Earth

巻 116, p. B10405, 発行日 2011
旧ID 34736
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