The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France)
Ground ice of permafrost origin and sedimentary ice of glacial origin can coexist in locations where rock glaciers and glaciers interacted, as well as in glacigenic sediments abandoned by a retreating glacier and subsequently exposed again to atmospheric cooling. Some of these geomorphological setti...
Published in: | Quaternary Science Reviews |
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Online Access: | http://hdl.handle.net/11383/1742080 https://doi.org/10.1016/j.quascirev.2009.10.008 |
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ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/1742080 2024-04-21T08:04:25+00:00 The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) Ribolini A. Fabre D. Bodin X. Marchisio M. Sartini S. Spagnolo M. Schoeneich P. GUGLIELMIN, MAURO Ribolini, A. Guglielmin, Mauro Fabre, D. Bodin, X. Marchisio, M. Sartini, S. Spagnolo, M. Schoeneich, P. 2010 http://hdl.handle.net/11383/1742080 https://doi.org/10.1016/j.quascirev.2009.10.008 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000274960100010 volume:29 firstpage:507 lastpage:521 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11383/1742080 doi:10.1016/j.quascirev.2009.10.008 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-74649084973 info:eu-repo/semantics/openAccess MOUNTAIN PERMAFROST UPPER VALTELLINA RESISTIVITY TOMOGRAPHY MARITIME ALPS SWISS ALPS ICE CORE DYNAMICS ENVIRONMENT FOREFIELDS MASSIF info:eu-repo/semantics/article 2010 ftuninsubriairis https://doi.org/10.1016/j.quascirev.2009.10.008 2024-03-28T01:22:53Z Ground ice of permafrost origin and sedimentary ice of glacial origin can coexist in locations where rock glaciers and glaciers interacted, as well as in glacigenic sediments abandoned by a retreating glacier and subsequently exposed again to atmospheric cooling. Some of these geomorphological settings in the Central (Foscagno rock glacier) and Western Alps (Marinet and Schiantala rock glaciers, Schiantala debris-covered glacier, Maledia glacier) were explored by means of geoelectrical tomographies. The aim was that of inferring the presence of ice and cryologically interpreting electrical stratigraphies in order to test whether or not the internal structure of these landforms can be used for the reconstruction of recent permafrost and glacier evolution. Geomorphological data assisted these reconstructions and available borehole stratigraphies were used to calibrate the resistivities. Along with the ice-debris mixture, massive ice has also been found as lenses both at the apex and the front of the studied rock glaciers. These lenses of sedimentary origin are thought to be transferred from a glacier snout to sectors of rock glacier and eventually embedded into the permafrost creep. The scarcity of frozen debris in the mid-upper part of the rock glaciers - as revealed by low resistivity values - can be due to the disruptive effect of the over-riding glacier over the permafrost. The near-surface sedimentary ice masses detected along the slopes of the studied glacial cirques are interpreted as or debris-covered terminations of the glaciers still visible upward, or as fragments of it detached by the main bodies. These ice masses are locally associated to medium-high resistive sediments, consistent with permafrost occurrence. This indicates that the non-glacial environment established during the deglaciation allowed the onset of frozen sediments formation. Overall, the results indicate that internal structure of rock glaciers and recent-deglaciated slopes can store the different climate-related episodes occurred in a ... Article in Journal/Newspaper Ice ice core permafrost IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) Quaternary Science Reviews 29 3-4 507 521 |
institution |
Open Polar |
collection |
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
op_collection_id |
ftuninsubriairis |
language |
unknown |
topic |
MOUNTAIN PERMAFROST UPPER VALTELLINA RESISTIVITY TOMOGRAPHY MARITIME ALPS SWISS ALPS ICE CORE DYNAMICS ENVIRONMENT FOREFIELDS MASSIF |
spellingShingle |
MOUNTAIN PERMAFROST UPPER VALTELLINA RESISTIVITY TOMOGRAPHY MARITIME ALPS SWISS ALPS ICE CORE DYNAMICS ENVIRONMENT FOREFIELDS MASSIF Ribolini A. Fabre D. Bodin X. Marchisio M. Sartini S. Spagnolo M. Schoeneich P. GUGLIELMIN, MAURO The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
topic_facet |
MOUNTAIN PERMAFROST UPPER VALTELLINA RESISTIVITY TOMOGRAPHY MARITIME ALPS SWISS ALPS ICE CORE DYNAMICS ENVIRONMENT FOREFIELDS MASSIF |
description |
Ground ice of permafrost origin and sedimentary ice of glacial origin can coexist in locations where rock glaciers and glaciers interacted, as well as in glacigenic sediments abandoned by a retreating glacier and subsequently exposed again to atmospheric cooling. Some of these geomorphological settings in the Central (Foscagno rock glacier) and Western Alps (Marinet and Schiantala rock glaciers, Schiantala debris-covered glacier, Maledia glacier) were explored by means of geoelectrical tomographies. The aim was that of inferring the presence of ice and cryologically interpreting electrical stratigraphies in order to test whether or not the internal structure of these landforms can be used for the reconstruction of recent permafrost and glacier evolution. Geomorphological data assisted these reconstructions and available borehole stratigraphies were used to calibrate the resistivities. Along with the ice-debris mixture, massive ice has also been found as lenses both at the apex and the front of the studied rock glaciers. These lenses of sedimentary origin are thought to be transferred from a glacier snout to sectors of rock glacier and eventually embedded into the permafrost creep. The scarcity of frozen debris in the mid-upper part of the rock glaciers - as revealed by low resistivity values - can be due to the disruptive effect of the over-riding glacier over the permafrost. The near-surface sedimentary ice masses detected along the slopes of the studied glacial cirques are interpreted as or debris-covered terminations of the glaciers still visible upward, or as fragments of it detached by the main bodies. These ice masses are locally associated to medium-high resistive sediments, consistent with permafrost occurrence. This indicates that the non-glacial environment established during the deglaciation allowed the onset of frozen sediments formation. Overall, the results indicate that internal structure of rock glaciers and recent-deglaciated slopes can store the different climate-related episodes occurred in a ... |
author2 |
Ribolini, A. Guglielmin, Mauro Fabre, D. Bodin, X. Marchisio, M. Sartini, S. Spagnolo, M. Schoeneich, P. |
format |
Article in Journal/Newspaper |
author |
Ribolini A. Fabre D. Bodin X. Marchisio M. Sartini S. Spagnolo M. Schoeneich P. GUGLIELMIN, MAURO |
author_facet |
Ribolini A. Fabre D. Bodin X. Marchisio M. Sartini S. Spagnolo M. Schoeneich P. GUGLIELMIN, MAURO |
author_sort |
Ribolini A. |
title |
The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
title_short |
The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
title_full |
The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
title_fullStr |
The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
title_full_unstemmed |
The internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the Central and Western Alps (Italy-France) |
title_sort |
internal structure of rock glaciers and recently deglaciated slopes as revealed by geoelectrical tomography: insights on permafrost and recent glacial evolution in the central and western alps (italy-france) |
publishDate |
2010 |
url |
http://hdl.handle.net/11383/1742080 https://doi.org/10.1016/j.quascirev.2009.10.008 |
genre |
Ice ice core permafrost |
genre_facet |
Ice ice core permafrost |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000274960100010 volume:29 firstpage:507 lastpage:521 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11383/1742080 doi:10.1016/j.quascirev.2009.10.008 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-74649084973 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.10.008 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
3-4 |
container_start_page |
507 |
op_container_end_page |
521 |
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1796944019322830848 |