Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL092757 |
Groundwater flow through continuous permafrost along geological boundary revealed by electrical resistivity tomography | |
Mikkel Toft Hornum; Peter Betlem; Andy Hodson | |
2021-07-03 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | In continuous permafrost regions, pathways for transport of sub-permafrost groundwater to the surface sometimes perforate the frozen ground and result in the formation of a pingo. Explanations offered for the locations of such pathways have so far included hydraulically conductive geological units and faults. On Svalbard, several pingos locate at valley flanks where these controls are apparently lacking. Intrigued by this observation, we elucidated the geological setting around such a pingo with electrical resistivity tomography. The inverted resistivity models showed a considerable contrast between the uphill and valley-sides of the pingo. We conclude that this contrast reflects a geological boundary between low-permeable marine sediments and consolidated strata. Groundwater presumably flows towards the pingo spring through glacially induced fractures in the strata immediately below the marine sediments. Our finding suggests that flanks of uplifted Arctic valleys deserve attention as possible discharge locations for deep groundwater and greenhouse gases to the surface. |
领域 | 气候变化 |
URL | 查看原文 |
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/333770 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Mikkel Toft Hornum,Peter Betlem,Andy Hodson. Groundwater flow through continuous permafrost along geological boundary revealed by electrical resistivity tomography[J]. Geophysical Research Letters,2021. |
APA | Mikkel Toft Hornum,Peter Betlem,&Andy Hodson.(2021).Groundwater flow through continuous permafrost along geological boundary revealed by electrical resistivity tomography.Geophysical Research Letters. |
MLA | Mikkel Toft Hornum,et al."Groundwater flow through continuous permafrost along geological boundary revealed by electrical resistivity tomography".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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