Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084889 |
The Minimum Scale of Grooving on a Recently Ruptured Limestone Fault | |
Okamoto, K. K.1; Brodsky, E. E.1; Thom, C. A.2; Smeraglia, L.3; Billi, A.4 | |
2019-11-11 | |
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:21页码:11878-11885 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Italy |
英文摘要 | Faults have grooves that are formed by abrasion and wear during slip. Recent observations indicate that this grooving is only a large-scale feature, indicating brittle behavior has a length scale limit. The connection between this scale and earthquake behavior remains limited because no examples exist from a proven seismogenic fault. Here, we address this problem and analyze differences in this scale between lithologies to further our understanding of the underlying mechanics. This study uses samples from the Mt. Vettoretto fault collected after the Norcia earthquake of 2016. We imaged fault topography with a white light interferometer and 10 mu m resolution structure from motion and then calculated a Monte Carlo version of root mean square roughness. We found a minimum scale of grooving of similar to 100 mu m. In comparing this fault to the Corona Heights fault, we find that this minimum grooving scale is consistent with predictions based on material properties. Plain Language Summary As two surfaces slide past each other, harder material can cause grooves or scratches to form in the direction of slip. Recent work showed that on a fault, there exists a change in geometry, or roughness, within these grooves that is evidence of a change in how frictional contacts are deformed. At the micrometer scale, these contacts are deforming without breaking. To link this process to earthquakes, we aim to measure this scale on a fault that hosts known earthquakes. Here, we measure roughness on a fault slipped during the 2016 Norcia earthquake using interferometry and photography. We find this scale and show that it is predictable by measuring properties of the fault. This gives a link between laboratory and natural earthquakes by measuring a length scale and a deformation process that is common to both. |
英文关键词 | roughness earthquake nucleation deformation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000495483300001 |
WOS关键词 | SLIP ; ROUGHNESS ; SURFACES ; PHOTOGRAMMETRY ; INDENTATION ; EARTHQUAKE ; FRICTION ; INSIGHTS |
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/224985 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 2.Univ Oxford, Dept Earth Sci, Oxford, England; 3.Sapienza Univ Rome, Dipartimento Sci Terra, Rome, Italy; 4.CNR, IGAG, Rome, Italy |
推荐引用方式 GB/T 7714 | Okamoto, K. K.,Brodsky, E. E.,Thom, C. A.,et al. The Minimum Scale of Grooving on a Recently Ruptured Limestone Fault[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):11878-11885. |
APA | Okamoto, K. K.,Brodsky, E. E.,Thom, C. A.,Smeraglia, L.,&Billi, A..(2019).The Minimum Scale of Grooving on a Recently Ruptured Limestone Fault.GEOPHYSICAL RESEARCH LETTERS,46(21),11878-11885. |
MLA | Okamoto, K. K.,et al."The Minimum Scale of Grooving on a Recently Ruptured Limestone Fault".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):11878-11885. |
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