Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps
International audience We investigated the Sachette rock glacier, Vanoise Massif, Northern French Alps, using former equilibrium line altitude reconstruction from glacial deposits, aerial photograph analysis, and ground-penetrating radar (GPR). The rock glacier is a young (probably <6000 yr) and...
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ftecolephe:oai:HAL:hal-01740094v1 2024-05-19T07:41:53+00:00 Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps Monnier, S Camerlynck, Christian Rejiba, Fayçal Kinnard, C Galibert, Py Centro de Estudios Avanzados en Zonas Aridas (CEAZA) Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE) Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2011 https://normandie-univ.hal.science/hal-01740094 https://normandie-univ.hal.science/hal-01740094/document https://normandie-univ.hal.science/hal-01740094/file/tcd-5-3597-2011.pdf https://doi.org/10.5194/tcd-5-3597-2011 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tcd-5-3597-2011 hal-01740094 https://normandie-univ.hal.science/hal-01740094 https://normandie-univ.hal.science/hal-01740094/document https://normandie-univ.hal.science/hal-01740094/file/tcd-5-3597-2011.pdf doi:10.5194/tcd-5-3597-2011 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0432 EISSN: 1994-0440 The Cryosphere Discussions https://normandie-univ.hal.science/hal-01740094 The Cryosphere Discussions, 2011, 5 (6), pp.3597-3626. ⟨10.5194/tcd-5-3597-2011⟩ [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2011 ftecolephe https://doi.org/10.5194/tcd-5-3597-2011 2024-04-25T01:30:23Z International audience We investigated the Sachette rock glacier, Vanoise Massif, Northern French Alps, using former equilibrium line altitude reconstruction from glacial deposits, aerial photograph analysis, and ground-penetrating radar (GPR). The rock glacier is a young (probably <6000 yr) and active landform. The GPR survey consisted of two CMP measurements and four constant-offset profiles. From CMP measurements, the radar wave velocity in exposed shallow massive ice is 0.165–0.17 m ns−1. The constant-offset GPR data was processed and analysed in order to reconstruct the stratigraphy and model the radar wave velocity in two dimensions. The integration of the morphology, the velocity models, and the stratigraphy emphasized, in the upper half of the rock glacier, the good correspondence between high radar wave velocities (>0.15–0.16 m ns−1) and reflectors having a dipping-syncline structure, typical of true glaciers. Consequently, the rock glacier structure is described as being constituted of a glacial massive ice core embedded into diamictons. Our study of the Sachette rock glacier highlights possible significance of rock glaciers and interactions between glacier and permafrost in alpine environments. Article in Journal/Newspaper Ice ice core permafrost The Cryosphere The Cryosphere Discussions EPHE (Ecole pratique des hautes études, Paris): HAL |
institution |
Open Polar |
collection |
EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
ftecolephe |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Monnier, S Camerlynck, Christian Rejiba, Fayçal Kinnard, C Galibert, Py Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience We investigated the Sachette rock glacier, Vanoise Massif, Northern French Alps, using former equilibrium line altitude reconstruction from glacial deposits, aerial photograph analysis, and ground-penetrating radar (GPR). The rock glacier is a young (probably <6000 yr) and active landform. The GPR survey consisted of two CMP measurements and four constant-offset profiles. From CMP measurements, the radar wave velocity in exposed shallow massive ice is 0.165–0.17 m ns−1. The constant-offset GPR data was processed and analysed in order to reconstruct the stratigraphy and model the radar wave velocity in two dimensions. The integration of the morphology, the velocity models, and the stratigraphy emphasized, in the upper half of the rock glacier, the good correspondence between high radar wave velocities (>0.15–0.16 m ns−1) and reflectors having a dipping-syncline structure, typical of true glaciers. Consequently, the rock glacier structure is described as being constituted of a glacial massive ice core embedded into diamictons. Our study of the Sachette rock glacier highlights possible significance of rock glaciers and interactions between glacier and permafrost in alpine environments. |
author2 |
Centro de Estudios Avanzados en Zonas Aridas (CEAZA) Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE) Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Monnier, S Camerlynck, Christian Rejiba, Fayçal Kinnard, C Galibert, Py |
author_facet |
Monnier, S Camerlynck, Christian Rejiba, Fayçal Kinnard, C Galibert, Py |
author_sort |
Monnier, S |
title |
Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
title_short |
Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
title_full |
Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
title_fullStr |
Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
title_full_unstemmed |
Glacier ice in rock glaciers: a case study in the Vanoise Massif, Northern French Alps |
title_sort |
glacier ice in rock glaciers: a case study in the vanoise massif, northern french alps |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://normandie-univ.hal.science/hal-01740094 https://normandie-univ.hal.science/hal-01740094/document https://normandie-univ.hal.science/hal-01740094/file/tcd-5-3597-2011.pdf https://doi.org/10.5194/tcd-5-3597-2011 |
genre |
Ice ice core permafrost The Cryosphere The Cryosphere Discussions |
genre_facet |
Ice ice core permafrost The Cryosphere The Cryosphere Discussions |
op_source |
ISSN: 1994-0432 EISSN: 1994-0440 The Cryosphere Discussions https://normandie-univ.hal.science/hal-01740094 The Cryosphere Discussions, 2011, 5 (6), pp.3597-3626. ⟨10.5194/tcd-5-3597-2011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tcd-5-3597-2011 hal-01740094 https://normandie-univ.hal.science/hal-01740094 https://normandie-univ.hal.science/hal-01740094/document https://normandie-univ.hal.science/hal-01740094/file/tcd-5-3597-2011.pdf doi:10.5194/tcd-5-3597-2011 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tcd-5-3597-2011 |
_version_ |
1799481486625210368 |