GSTDTAP  > 气候变化
DOI10.1002/2017GL073774
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
ISSN0094-8276
EISSN1944-8007
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
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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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