Ice-buttressing-controlled rock slope failure on a cirque headwall, Lake District, UK
文献类型：期刊论文
| 作者 | Carling, Paul A.2,3; Jansen, John D.4; Su, Teng1,5; Andersen, Jane Lund6; Knudsen, Mads Faurschou6 |
| 刊名 | EARTH SURFACE DYNAMICS
 |
| 出版日期 | 2023-08-17 |
| 卷号 | 11期号:4页码:817-833 |
| ISSN号 | 2196-6311 |
| DOI | 10.5194/esurf-11-817-2023 |
| 通讯作者 | Carling, Paul A.(p.a.carling@soton.ac.uk) |
| 英文摘要 | Rock slope failures in the Lake District, UK, have been associated with deglacial processes after the Last Glacial Maximum, but the controls and timing of the failures remain poorly known. A cirque headwall failure was investigated to determine failure mechanisms and timing. The translated wedge of rock is thin and lies on a steep failure plane, yet the friable strata were not disrupted by downslope movement. Fault lines and a failure surface, defining the wedge, were used as input to a numerical model of rock wedge stability. Various failure scenarios indicated that the slope was unstable and would have failed catastrophically if not supported by glacial ice in the base of the cirque. The amount of ice required to buttress the slope is insubstantial, indicating likely failure during the thinning of the cirque glacier. We propose that, as the ice thinned, the wedge was lowered slowly down the cirque headwall, gradually exposing the failure plane. A cosmogenic 10Be surface exposure age of 18.0 +/- 1.2 ka from the outer surface of the wedge indicates Late Devensian de-icing of the backwall of the cirque, with a second exposure age from the upper portion of the failure plane yielding 12.0 +/- 0.8 ka. The 18.0 +/- 1.2 ka date is consistent with a small buttressing ice mass being present in the cirque at the time of regional deglaciation. The exposure age of 12.0 +/- 0.8 ka represents a minimum age, as the highly fractured surface of the failure plane has experienced post-failure mass-wasting. Considering the chronology, it appears unlikely that the cirque was reoccupied by a substantial ice mass during the Younger Dryas stadial. |
| WOS关键词 | NUCLIDE PRODUCTION-RATES ; YOUNGER DRYAS GLACIERS ; EROSION ; SCOTLAND ; GLACIATION ; LANDFORMS ; PATTERNS ; IRELAND ; BRITAIN ; EVENTS |
| 资助项目 | State Scholarship Fund of the China Scholarship Council |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| WOS记录号 | WOS:001049904900001 |
| 资助机构 | State Scholarship Fund of the China Scholarship Council |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196457]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Carling, Paul A. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Southampton, Geog & Environm Sci, Southampton SO17 1BJ, England 3.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YW, England 4.Czech Acad Sci, GFU Inst Geophys, Prague, Czech Republic 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100049, Peoples R China 6.Aarhus Univ, Dept Geosci, Aarhus, Denmark |
| 推荐引用方式 GB/T 7714 | Carling, Paul A.,Jansen, John D.,Su, Teng,et al. Ice-buttressing-controlled rock slope failure on a cirque headwall, Lake District, UK[J]. EARTH SURFACE DYNAMICS,2023,11(4):817-833. |
| APA | Carling, Paul A.,Jansen, John D.,Su, Teng,Andersen, Jane Lund,&Knudsen, Mads Faurschou.(2023).Ice-buttressing-controlled rock slope failure on a cirque headwall, Lake District, UK.EARTH SURFACE DYNAMICS,11(4),817-833. |
| MLA | Carling, Paul A.,et al."Ice-buttressing-controlled rock slope failure on a cirque headwall, Lake District, UK".EARTH SURFACE DYNAMICS 11.4(2023):817-833. |
入库方式： OAI收割
来源：地理科学与资源研究所
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