Holocene vertical deformation outside the active rift zone of north Iceland
In Iceland, the main deformation activity occurs not only in the active rift zone where volcanism and seismicity coexist in fissure swarms but also in the transfer zones (north and south) where the main part of the seismic activity is located. Many studies described extension and vertical displaceme...
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.science/hal-00083680 https://doi.org/10.1016/j.tecto.2005.04.009 |
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ftsorbonneuniv:oai:HAL:hal-00083680v1 2023-07-30T03:55:35+02:00 Holocene vertical deformation outside the active rift zone of north Iceland Dauteuil, Olivier Bouffette, J. Tournat, F. van Vliet-Lanoë, Brigitte Embry, J.C. Quete, Y. Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Paléobiodiversité et paléoenvironnements Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 2005 https://hal.science/hal-00083680 https://doi.org/10.1016/j.tecto.2005.04.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2005.04.009 hal-00083680 https://hal.science/hal-00083680 doi:10.1016/j.tecto.2005.04.009 ISSN: 0040-1951 EISSN: 1879-3266 Tectonophysics https://hal.science/hal-00083680 Tectonophysics, 2005, 404 (4), pp.203-216. ⟨10.1016/j.tecto.2005.04.009⟩ GPS mapping Tilting Iceland Doming [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/article Journal articles 2005 ftsorbonneuniv https://doi.org/10.1016/j.tecto.2005.04.009 2023-07-11T22:35:21Z In Iceland, the main deformation activity occurs not only in the active rift zone where volcanism and seismicity coexist in fissure swarms but also in the transfer zones (north and south) where the main part of the seismic activity is located. Many studies described extension and vertical displacement associated with rifting and magmatism inside this rift zone. They have classically assumed that no deformation occurs outside the rift zone. However, few studies have already been conducted outside the rift zone. This work focuses on an area west of the rift zone in the Akureyri area, which displays an anomalous topography. We illustrate an ENE tilting of 0.23° since approximately 17,000 years ago using ancient lacustrine shorelines mapped in detail with a differential GPS survey and analysis of SPOT images. This degree of tilting corresponds to a vertical displacement of 160 m, i.e., a deformation rate of 1 cm/year, which is close to values measured in the active zone. This long wavelength deformation is compatible both with (i) the topographic anomaly of the Akureyri area, and with (ii) the very diffuse microseismicity that affects northern Iceland. The origin of this tilting is discussed and the different hypotheses (glacial loading response, rift uplift, transform zone effect, thermal doming, local magmatic intrusion) are reviewed. Our results, structural data and the topography are more consistent with a local magmatic intrusion inducing local doming. This work is the first attempt at quantifying long-term deformation outside the rift zone in Iceland. Article in Journal/Newspaper Akureyri Akureyri Akureyri Iceland HAL Sorbonne Université Akureyri Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Tectonophysics 404 3-4 203 216 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
GPS mapping Tilting Iceland Doming [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
GPS mapping Tilting Iceland Doming [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Dauteuil, Olivier Bouffette, J. Tournat, F. van Vliet-Lanoë, Brigitte Embry, J.C. Quete, Y. Holocene vertical deformation outside the active rift zone of north Iceland |
topic_facet |
GPS mapping Tilting Iceland Doming [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
In Iceland, the main deformation activity occurs not only in the active rift zone where volcanism and seismicity coexist in fissure swarms but also in the transfer zones (north and south) where the main part of the seismic activity is located. Many studies described extension and vertical displacement associated with rifting and magmatism inside this rift zone. They have classically assumed that no deformation occurs outside the rift zone. However, few studies have already been conducted outside the rift zone. This work focuses on an area west of the rift zone in the Akureyri area, which displays an anomalous topography. We illustrate an ENE tilting of 0.23° since approximately 17,000 years ago using ancient lacustrine shorelines mapped in detail with a differential GPS survey and analysis of SPOT images. This degree of tilting corresponds to a vertical displacement of 160 m, i.e., a deformation rate of 1 cm/year, which is close to values measured in the active zone. This long wavelength deformation is compatible both with (i) the topographic anomaly of the Akureyri area, and with (ii) the very diffuse microseismicity that affects northern Iceland. The origin of this tilting is discussed and the different hypotheses (glacial loading response, rift uplift, transform zone effect, thermal doming, local magmatic intrusion) are reviewed. Our results, structural data and the topography are more consistent with a local magmatic intrusion inducing local doming. This work is the first attempt at quantifying long-term deformation outside the rift zone in Iceland. |
author2 |
Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Paléobiodiversité et paléoenvironnements Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Dauteuil, Olivier Bouffette, J. Tournat, F. van Vliet-Lanoë, Brigitte Embry, J.C. Quete, Y. |
author_facet |
Dauteuil, Olivier Bouffette, J. Tournat, F. van Vliet-Lanoë, Brigitte Embry, J.C. Quete, Y. |
author_sort |
Dauteuil, Olivier |
title |
Holocene vertical deformation outside the active rift zone of north Iceland |
title_short |
Holocene vertical deformation outside the active rift zone of north Iceland |
title_full |
Holocene vertical deformation outside the active rift zone of north Iceland |
title_fullStr |
Holocene vertical deformation outside the active rift zone of north Iceland |
title_full_unstemmed |
Holocene vertical deformation outside the active rift zone of north Iceland |
title_sort |
holocene vertical deformation outside the active rift zone of north iceland |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00083680 https://doi.org/10.1016/j.tecto.2005.04.009 |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Akureyri Tilting |
geographic_facet |
Akureyri Tilting |
genre |
Akureyri Akureyri Akureyri Iceland |
genre_facet |
Akureyri Akureyri Akureyri Iceland |
op_source |
ISSN: 0040-1951 EISSN: 1879-3266 Tectonophysics https://hal.science/hal-00083680 Tectonophysics, 2005, 404 (4), pp.203-216. ⟨10.1016/j.tecto.2005.04.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2005.04.009 hal-00083680 https://hal.science/hal-00083680 doi:10.1016/j.tecto.2005.04.009 |
op_doi |
https://doi.org/10.1016/j.tecto.2005.04.009 |
container_title |
Tectonophysics |
container_volume |
404 |
container_issue |
3-4 |
container_start_page |
203 |
op_container_end_page |
216 |
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1772818845944250368 |