| 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 |
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|
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
Uehara, Shin-Ichi
Mizoguchi, Kazuo
Shimizu, Ichiko
Okazaki, Keishi
Masuda, Koji
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| アクセス権 |
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|
アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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|
権利情報 |
(c) 2011 by the American Geophysical Union. |
| 主題 |
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主題Scheme |
NDC |
|
主題 |
450 |
| 内容記述 |
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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 |
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出版者 |
American Geophysical Union |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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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 |
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1029/2010JB008062 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1029/2010JB008062 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0148-0227 |
| 収録物識別子 |
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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 |
JGeophysRes-SolidEarth_116_B10405.pdf (4.7 MB)
