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DOI | 10.1038/s41467-017-01230-y |
Mechanical behaviour of fluid-lubricated faults | |
Cornelio, C.1; Spagnuolo, E.2; Di Toro, G.3; Nielsen, S.4; Violay, M.1 | |
2019-03-20 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Italy; England |
英文摘要 | Fluids are pervasive in fault zones cutting the Earth's crust; however, the effect of fluid viscosity on fault mechanics is mainly conjectured by theoretical models. We present friction experiments performed on both dry and fluid-permeated silicate and carbonate bearingrocks, at normal effective stresses up to 20 MPa, with a slip-rate ranging between 10 mu m/s and 1 m/s. Four different fluid viscosities were tested. We show that both static and dynamic friction coefficients decrease with viscosity and that dynamic friction depends on the dimensionless Sommerfeld number (S) as predicted by the elastohydrodynamic-lubrication theory (EHD). Under favourable conditions (depending on the fluid viscosity (eta), co-seismic slip-rate (V), fault geometry (L/H-0(2)) and earthquake nucleation depth (proportional to sigma(seff))), EHD might be an effective weakening mechanism during natural and induced earthquakes. However, at seismic slip-rate, the slip weakening distance (D-c) increases markedly for a range of fluid viscosities expected in the Earth, potentially favouring slow-slip rather than rupture propagation for small to moderate earthquakes. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461757600003 |
WOS关键词 | ELASTOHYDRODYNAMIC LUBRICATION ; FRICTION EXPERIMENTS ; PORE-FLUID ; STICK-SLIP ; PRESSURE ; VELOCITY ; VISCOSITY ; RHEOLOGY ; EVOLUTION ; WATER |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203489 |
专题 | 资源环境科学 |
作者单位 | 1.Ecole Polytech Fed Lausanne, Lab Expt Rock Mech LEMR, Stn 18, CH-1015 Lausanne, Switzerland; 2.Ist Nazl Geofis & Vuolcanol, Via Vigna Murata 605, I-00143 Rome, Italy; 3.Univ Padua, Dipartimento Geosci, Via G Gradenigo 6, I-35131 Padua, Italy; 4.Univ Durham, Dept Earth Sci, Stockton Rd, Durham DH1 3LE, England |
推荐引用方式 GB/T 7714 | Cornelio, C.,Spagnuolo, E.,Di Toro, G.,et al. Mechanical behaviour of fluid-lubricated faults[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Cornelio, C.,Spagnuolo, E.,Di Toro, G.,Nielsen, S.,&Violay, M..(2019).Mechanical behaviour of fluid-lubricated faults.NATURE COMMUNICATIONS,10. |
MLA | Cornelio, C.,et al."Mechanical behaviour of fluid-lubricated faults".NATURE COMMUNICATIONS 10(2019). |
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