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DOI | 10.1029/2018GL080384 |
Contrasting Mechanical and Hydraulic Properties of Wet and Dry Fault Zones in a Proposed Shale-Hosted Nuclear Waste Repository | |
Felipe Orellana, Luis1,2; Giorgetti, Carolina1; Violay, Marie1 | |
2019-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:3页码:1357-1366 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Chile |
英文摘要 | The underground disposal of high-level nuclear waste is a pressing issue for several countries. In Switzerland, the Opalinus Clay formation is a shale with favorable barrier properties. However, small-to-large faults intersecting the formation bring the long-term integrity of the future repositories into question. Here we present the first systematic laboratory study on the frictional strength, stability, dilatancy, and permeability of simulated Opalinus Clay gouge under typical repository conditions. Wet gouges exhibit an extremely low coefficient of friction (mu(f)similar to 0.16), velocity-strengthening behavior, and shear-enhanced dilatancy at the onset of slip, and permeability increase. Conversely, dry gouges remain weak (mu(f)similar to 0.36) but exhibit a transition from unstable to stable sliding with increasing sliding velocity. Thus, we infer that faults hosted in Opalinus Clay could be easily reactivated via aseismic creep, possibly acting as poor fluid conduits. However, if temporarily dried, the faults become potentially unstable, at least, at low sliding velocities ( |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462072800027 |
WOS关键词 | FRICTIONAL STRENGTH ; OPALINUS CLAY ; PERMEABILITY EVOLUTION ; DEPENDENT FRICTION ; INDUCED SEISMICITY ; SHEAR-STRESS ; GOUGE ; BEHAVIOR ; WATER ; SLIP |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/181353 |
专题 | 气候变化 |
作者单位 | 1.Ecole Polytech Fed Lausanne, IIC ENAC, Lab Expt Rock Mech, Lausanne, Switzerland; 2.Univ Chile, FCFM, DIMIN, Lab Rock Mech, Santiago, Chile |
推荐引用方式 GB/T 7714 | Felipe Orellana, Luis,Giorgetti, Carolina,Violay, Marie. Contrasting Mechanical and Hydraulic Properties of Wet and Dry Fault Zones in a Proposed Shale-Hosted Nuclear Waste Repository[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(3):1357-1366. |
APA | Felipe Orellana, Luis,Giorgetti, Carolina,&Violay, Marie.(2019).Contrasting Mechanical and Hydraulic Properties of Wet and Dry Fault Zones in a Proposed Shale-Hosted Nuclear Waste Repository.GEOPHYSICAL RESEARCH LETTERS,46(3),1357-1366. |
MLA | Felipe Orellana, Luis,et al."Contrasting Mechanical and Hydraulic Properties of Wet and Dry Fault Zones in a Proposed Shale-Hosted Nuclear Waste Repository".GEOPHYSICAL RESEARCH LETTERS 46.3(2019):1357-1366. |
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