Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain
This paper contributes to the study of permafrost in the Pyrenees by reporting geoelectrical investigations and thermal measurement on the Little Ice Age (LIA) forefields of two glaciers. The aim was to assess the internal composition of sedimentary bodies (debris rock glaciers and moraine deposits)...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.494 |
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ftrepec:oai:RePEc:wly:perpro:v:15:y:2004:i:3:p:207-220 2023-05-15T16:36:37+02:00 Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain Ralph Lugon Reynald Delaloye Enrique Serrano Emmanuel Reynard Christophe Lambiel Juan J. González‐Trueba https://doi.org/10.1002/ppp.494 unknown https://doi.org/10.1002/ppp.494 article ftrepec https://doi.org/10.1002/ppp.494 2020-12-04T13:31:25Z This paper contributes to the study of permafrost in the Pyrenees by reporting geoelectrical investigations and thermal measurement on the Little Ice Age (LIA) forefields of two glaciers. The aim was to assess the internal composition of sedimentary bodies (debris rock glaciers and moraine deposits) located in this proglacial environment. Ground ice was prospected using two DC resistivity techniques: vertical electrical soundings and resistivity mapping at a fixed pseudo‐depth. Extreme specific resistivities ranging between 1 and 25 MΩ m were detected under a thin (1–2 m) unfrozen layer, indicating the presence of a massive ice layer, certainly buried glacier ice. This ice of glacial origin probably covers former permafrost bodies, i.e. a much thicker layer of perennially frozen sediments. Low subsurface temperatures measured on the deposits indicate that buried glacier ice could have been preserved on top of permafrost since the end of the LIA or earlier Holocene glacier advances. This stratigraphy demonstrates that glaciers and pre‐existing perennially frozen sediments (permafrost) were in contact during the LIA. Copyright © 2004 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 15 3 207 220 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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This paper contributes to the study of permafrost in the Pyrenees by reporting geoelectrical investigations and thermal measurement on the Little Ice Age (LIA) forefields of two glaciers. The aim was to assess the internal composition of sedimentary bodies (debris rock glaciers and moraine deposits) located in this proglacial environment. Ground ice was prospected using two DC resistivity techniques: vertical electrical soundings and resistivity mapping at a fixed pseudo‐depth. Extreme specific resistivities ranging between 1 and 25 MΩ m were detected under a thin (1–2 m) unfrozen layer, indicating the presence of a massive ice layer, certainly buried glacier ice. This ice of glacial origin probably covers former permafrost bodies, i.e. a much thicker layer of perennially frozen sediments. Low subsurface temperatures measured on the deposits indicate that buried glacier ice could have been preserved on top of permafrost since the end of the LIA or earlier Holocene glacier advances. This stratigraphy demonstrates that glaciers and pre‐existing perennially frozen sediments (permafrost) were in contact during the LIA. Copyright © 2004 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Ralph Lugon Reynald Delaloye Enrique Serrano Emmanuel Reynard Christophe Lambiel Juan J. González‐Trueba |
spellingShingle |
Ralph Lugon Reynald Delaloye Enrique Serrano Emmanuel Reynard Christophe Lambiel Juan J. González‐Trueba Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
author_facet |
Ralph Lugon Reynald Delaloye Enrique Serrano Emmanuel Reynard Christophe Lambiel Juan J. González‐Trueba |
author_sort |
Ralph Lugon |
title |
Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
title_short |
Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
title_full |
Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
title_fullStr |
Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
title_full_unstemmed |
Permafrost and Little Ice Age glacier relationships, Posets Massif, Central Pyrenees, Spain |
title_sort |
permafrost and little ice age glacier relationships, posets massif, central pyrenees, spain |
url |
https://doi.org/10.1002/ppp.494 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://doi.org/10.1002/ppp.494 |
op_doi |
https://doi.org/10.1002/ppp.494 |
container_title |
Permafrost and Periglacial Processes |
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15 |
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3 |
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207 |
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220 |
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1766026949041324032 |