Post-glacial rebound of Iceland during the Holocene
International audience The geodynamic context of Iceland provides the rare opportunity to analyse the combined effects of a ridge and a hotspot on deformation processes. From a digital elevation model, field analysis and a compilation of previous work, we propose a synthesis of vertical motions of I...
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ftccsdartic:oai:HAL:insu-00600515v1 2023-05-15T16:43:57+02:00 Post-glacial rebound of Iceland during the Holocene Le Breton, Eline Dauteuil, Olivier Biessy, Guillaume Géosciences Rennes (GR) Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) 2010 https://hal-insu.archives-ouvertes.fr/insu-00600515 https://doi.org/10.1144/0016-76492008-126 en eng HAL CCSD Geological Society of London info:eu-repo/semantics/altIdentifier/doi/10.1144/0016-76492008-126 insu-00600515 https://hal-insu.archives-ouvertes.fr/insu-00600515 doi:10.1144/0016-76492008-126 EISSN: 2041-479X Journal of the Geological Society https://hal-insu.archives-ouvertes.fr/insu-00600515 Journal of the Geological Society, Geological Society of London, 2010, 167 (2), pp.417-432. ⟨10.1144/0016-76492008-126⟩ [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1144/0016-76492008-126 2021-10-24T17:45:28Z International audience The geodynamic context of Iceland provides the rare opportunity to analyse the combined effects of a ridge and a hotspot on deformation processes. From a digital elevation model, field analysis and a compilation of previous work, we propose a synthesis of vertical motions of Iceland during the Holocene with a focus on the post-glacial rebound. We determined two ancient marine limits, one above and one below the present sea level, estimated at 10 ka 300 years and 8150 350 years bp, respectively. We calculated an uplift phase of 40170 m with a rate of 2.19.2 cm a 1 between 10 ka 300 years and 8150 350 years bp, corresponding to the post-glacial rebound of Iceland following the Weichselian glaciation. Spatial variations of the rebound are mainly related to the local glacial dynamics (ice load and deglaciation history) rather than the geodynamic context. However, the relaxation time deduced from uplift data is 4167 years in west Iceland and 2000 years in SSW Iceland. We estimated viscosity from relaxation time, ranging from 2.1 3 1019 Pa s to 3.2 3 1019 Pa s. The significant difference in the relaxation time is due to local variation of the lithospheric thickness as a result of rifting rather than because of a variation of the viscosity. Article in Journal/Newspaper Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of the Geological Society 167 2 417 432 |
institution |
Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes Le Breton, Eline Dauteuil, Olivier Biessy, Guillaume Post-glacial rebound of Iceland during the Holocene |
topic_facet |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The geodynamic context of Iceland provides the rare opportunity to analyse the combined effects of a ridge and a hotspot on deformation processes. From a digital elevation model, field analysis and a compilation of previous work, we propose a synthesis of vertical motions of Iceland during the Holocene with a focus on the post-glacial rebound. We determined two ancient marine limits, one above and one below the present sea level, estimated at 10 ka 300 years and 8150 350 years bp, respectively. We calculated an uplift phase of 40170 m with a rate of 2.19.2 cm a 1 between 10 ka 300 years and 8150 350 years bp, corresponding to the post-glacial rebound of Iceland following the Weichselian glaciation. Spatial variations of the rebound are mainly related to the local glacial dynamics (ice load and deglaciation history) rather than the geodynamic context. However, the relaxation time deduced from uplift data is 4167 years in west Iceland and 2000 years in SSW Iceland. We estimated viscosity from relaxation time, ranging from 2.1 3 1019 Pa s to 3.2 3 1019 Pa s. The significant difference in the relaxation time is due to local variation of the lithospheric thickness as a result of rifting rather than because of a variation of the viscosity. |
author2 |
Géosciences Rennes (GR) Université de Rennes 1 (UR1) Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Le Breton, Eline Dauteuil, Olivier Biessy, Guillaume |
author_facet |
Le Breton, Eline Dauteuil, Olivier Biessy, Guillaume |
author_sort |
Le Breton, Eline |
title |
Post-glacial rebound of Iceland during the Holocene |
title_short |
Post-glacial rebound of Iceland during the Holocene |
title_full |
Post-glacial rebound of Iceland during the Holocene |
title_fullStr |
Post-glacial rebound of Iceland during the Holocene |
title_full_unstemmed |
Post-glacial rebound of Iceland during the Holocene |
title_sort |
post-glacial rebound of iceland during the holocene |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00600515 https://doi.org/10.1144/0016-76492008-126 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
EISSN: 2041-479X Journal of the Geological Society https://hal-insu.archives-ouvertes.fr/insu-00600515 Journal of the Geological Society, Geological Society of London, 2010, 167 (2), pp.417-432. ⟨10.1144/0016-76492008-126⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1144/0016-76492008-126 insu-00600515 https://hal-insu.archives-ouvertes.fr/insu-00600515 doi:10.1144/0016-76492008-126 |
op_doi |
https://doi.org/10.1144/0016-76492008-126 |
container_title |
Journal of the Geological Society |
container_volume |
167 |
container_issue |
2 |
container_start_page |
417 |
op_container_end_page |
432 |
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1766034278725976064 |