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  1. 防災科研関係論文

Fault strength drop due to phase transitions in the pore fluid

https://nied-repo.bosai.go.jp/records/4502
https://nied-repo.bosai.go.jp/records/4502
86c76a97-5a84-4c2d-9273-356e806a3146
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Fault strength drop due to phase transitions in the pore fluid
言語
言語 eng
著者 Kazuo Mizoguchi

× Kazuo Mizoguchi

en Kazuo Mizoguchi

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Miki Takahashi

× Miki Takahashi

en Miki Takahashi

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Koji Masuda

× Koji Masuda

en Koji Masuda

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Eiichi Fukuyama

× Eiichi Fukuyama

en Eiichi Fukuyama

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抄録
内容記述タイプ Other
内容記述 We conducted tri-axial friction experiments for quartz gouge at hydrothermal conditions to examine the effect of phase transition of water. We observed a decrease of similar to 0.05 in its coefficient of friction during the transition between liquid and vapor. This can be interpreted as a local pore pressure increase in the gouge-filled layer during the phase transition, which is caused by the surface tension of bubbles created between the two different phases. The local pore pressure increase deduces effective normal stress in the gauge layer, which makes a decrease of the frictional strength. The transient friction drop on a fault can play an important role in triggering an earthquake not only in hydrothermal areas but also in typical seismically active areas in the crust where water often contains CO2 of various concentrations because the CO2 density in the binary system of H2O-CO2 controls the pressure-temperature condition of liquid/vapor phase equilibrium.
言語 en
書誌情報 en : GEOPHYSICAL RESEARCH LETTERS

巻 34, 号 9, 発行日 2007-05
出版者
言語 en
出版者 AMER GEOPHYSICAL UNION
ISSN
収録物識別子タイプ EISSN
収録物識別子 1944-8007
DOI
関連識別子 10.1029/2007GL029345
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