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DOI | 10.1002/2017GL073774 |
Rock avalanche deposits store quantitative evidence on internal shear during runout | |
Zhang, M.1; McSaveney, M. J.2 | |
2017-09-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:17 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; New Zealand |
英文摘要 | We investigated the quantitative effect of internal shear on grain breakage during rock avalanche runout, by means of 38 ring-shear experiments on identical sand samples at different normal stresses, shear strains and shear strain rates. We compared sample grain-size characteristics before and after shearing. We found that grain size decreased with increase in normal stress and shear strain. Reduction in grain size was inferred to occur through grain breakage associated with grain interactions in strong force chains during strain. The results were consistent with observations of both inverse-grading structure in deep rock avalanche exposures, and fining and grading of particles with increasing rock avalanche travel distance. Our study suggested that with appropriate calibration, variations in grain-size distributions within a rock avalanche deposit would provide quantitative information on the distribution of internal shear during its runout. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411702400016 |
WOS关键词 | GEOPHYSICAL FLOWS ; FRENCH ALPS ; FRAGMENTATION ; LANDSLIDE ; DEBRIS ; CHINA ; MODEL ; SAND ; FLUIDIZATION ; SIMULATIONS |
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/29140 |
专题 | 气候变化 |
作者单位 | 1.China Univ Geosci, Fac Engn, Wuhan, Hubei, Peoples R China; 2.GNS Sci, Lower Hutt, New Zealand |
推荐引用方式 GB/T 7714 | Zhang, M.,McSaveney, M. J.. Rock avalanche deposits store quantitative evidence on internal shear during runout[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(17). |
APA | Zhang, M.,&McSaveney, M. J..(2017).Rock avalanche deposits store quantitative evidence on internal shear during runout.GEOPHYSICAL RESEARCH LETTERS,44(17). |
MLA | Zhang, M.,et al."Rock avalanche deposits store quantitative evidence on internal shear during runout".GEOPHYSICAL RESEARCH LETTERS 44.17(2017). |
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