Mineralogical Analysis of Selective Melting in Partially Coherent Rockslides: Bridging Solid and Molten Friction
文献类型：期刊论文
| 作者 | Deng, Yu2,3; He, Siming2,3,4 ; Scaringi, Gianvito1; Lei, Xiaoqin2,3,4
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2020 |
| 卷号 | 125期号:8页码:e2020JB019453 |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2020JB019453 |
| 产权排序 | 1 |
| 通讯作者 | He, Siming(hsm@imde.ac.cn) |
| 文献子类 | Article |
| 英文摘要 | Frictional shearing along the basal slip surface is the main energy dissipation mechanism in coherent landslides, which undergo little internal deformation during runout. Most landslide bodies, however, deform and break down more or less extensively; thus, only a portion of their potential energy is dissipated through basal shearing. The mineral components of rocks and soils have individual melting temperatures. Therefore, as temperature increases, selective melting will occur in a defined sequence. The product of such melting is termed frictionite. Here, we exploited a sliding block model to investigate the role of selective melting in the evolution of the frictional resistance (and hence mobility) of partially coherent landslides. We recognized three frictional stages, characterized by weakening, strengthening, and melt lubrication. As melting proceeds, a gradual transition from solid friction to viscous flow occurs, which can be modeled in terms of the molten mineral fraction. The chemical composition also evolves and so does its viscosity. Rocks with different mineral proportions (e.g., mafic vs. felsic rocks) will exhibit different frictional evolutions. Our model results are consistent with the recognized role of landslide thickness in defining its mobility. Moreover, the frictional strengthening stage is shown to become irrelevant under high confinement, thereby facilitating higher mobility, or sometimes shifting slip surface if weak layer exists. We also discussed the relevance of some strengthening-upon-melting behavior observed at the experimental scale, pointing out the role of the energy conversion coefficient, which is a proxy for landslide coherence. |
| 电子版国际标准刊号 | 2169-9356 |
| WOS关键词 | HIGH-VELOCITY ; DYNAMIC SIMULATION ; ROCK AVALANCHE ; FAULT ; LANDSLIDES ; EARTHQUAKE ; VISCOSITY ; FUSION ; LUBRICATION ; EMPLACEMENT |
| 资助项目 | Major Program of the National Natural Science Foundation of China[41790433] ; National Key Research and Development Program of China[2017YFC1501003] ; National Natural Science Foundation of China[41772312] ; Key Deployment Project of CAS[KFZD-SW-424] ; Fund for International Mobility of Researchers at Charles University (key activity 1-PrFGEOMOBIL)[CZ.02.2.69/0.0/0.0/16_027/0008495] ; Czech Science Foundation[GJ2028853Y] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000582684200038 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | Major Program of the National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Deployment Project of CAS ; Fund for International Mobility of Researchers at Charles University (key activity 1-PrFGEOMOBIL) ; Czech Science Foundation |
| 源URL | [http://ir.imde.ac.cn/handle/131551/50745]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | He, Siming |
| 作者单位 | 1.Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Faculty of Science, Prague, Czech Republic 2.Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; 3.University of Chinese Academy of Sciences, Beijing, China; 4.Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; |
| 推荐引用方式 GB/T 7714 | Deng, Yu,He, Siming,Scaringi, Gianvito,et al. Mineralogical Analysis of Selective Melting in Partially Coherent Rockslides: Bridging Solid and Molten Friction[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(8):e2020JB019453. |
| APA | Deng, Yu,He, Siming,Scaringi, Gianvito,&Lei, Xiaoqin.(2020).Mineralogical Analysis of Selective Melting in Partially Coherent Rockslides: Bridging Solid and Molten Friction.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(8),e2020JB019453. |
| MLA | Deng, Yu,et al."Mineralogical Analysis of Selective Melting in Partially Coherent Rockslides: Bridging Solid and Molten Friction".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.8(2020):e2020JB019453. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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