Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002
International audience The current tectonics of North Iceland are characterized by rifting episodes along fissure swarms and by ML 6–7 earthquakes in the transform zone between the northern rift zone and the Kolbeinsey Ridge north of Iceland. The last rifting period (1975–1984) was associated with a...
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ftccsdartic:oai:HAL:insu-00353295v1 2023-05-15T16:36:20+02:00 Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 Jouanne, François Villemin, Thierry Berger, A. Henriot, O. Laboratoire de Géodynamique des Chaines Alpines (LGCA) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2006 https://hal-insu.archives-ouvertes.fr/insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295/document https://hal-insu.archives-ouvertes.fr/insu-00353295/file/167-3-1439.pdf https://doi.org/10.1111/j.1365-246X.2006.03107.x en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2006.03107.x insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295/document https://hal-insu.archives-ouvertes.fr/insu-00353295/file/167-3-1439.pdf doi:10.1111/j.1365-246X.2006.03107.x info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal-insu.archives-ouvertes.fr/insu-00353295 Geophysical Journal International, Oxford University Press (OUP), 2006, 167 (3), pp.1439 à 1446. ⟨10.1111/j.1365-246X.2006.03107.x⟩ deformation GPS Krafla rifting Tjörnes transform zone [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2006 ftccsdartic https://doi.org/10.1111/j.1365-246X.2006.03107.x 2021-10-23T23:55:47Z International audience The current tectonics of North Iceland are characterized by rifting episodes along fissure swarms and by ML 6–7 earthquakes in the transform zone between the northern rift zone and the Kolbeinsey Ridge north of Iceland. The last rifting period (1975–1984) was associated with an average opening of 5 m along the Krafla fissure swarm. Post-rifting deformation has been revealed by GPS investigations in Northern Iceland. A GPS network was occupied in 1997, 1999 and 2002 to quantify present-day displacements and their variation with time, on both sides of the on-land part of the Húsavík–Flatey fault and around the Krafla fissure swarm. The main deformational features observed are: (1) decrease in spreading velocities between the two timespans 1997–1999 and 1999–2002, (2) the existence, south of the transform zone, of a well-defined ∼20–30-km-wide plate boundary where extension dominates, (3) directly adjacent east and west rift shoulders where displacements are close to those observed on the Eurasian and North American plates and (4) a displacement gradient on Tjörnes that could correspond either to elastic deformation related to a currently locked dextral strike-slip fault or to an attenuated post-rifting effect northwest of Krafla. Article in Journal/Newspaper Húsavík Iceland Kolbeinsey Flatey Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Kolbeinsey ENVELOPE(-18.687,-18.687,67.149,67.149) Kolbeinsey Ridge ENVELOPE(-16.917,-16.917,68.833,68.833) Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) Tjörnes ENVELOPE(-17.087,-17.087,66.152,66.152) Geophysical Journal International 167 3 1439 1446 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
deformation GPS Krafla rifting Tjörnes transform zone [SDU]Sciences of the Universe [physics] |
spellingShingle |
deformation GPS Krafla rifting Tjörnes transform zone [SDU]Sciences of the Universe [physics] Jouanne, François Villemin, Thierry Berger, A. Henriot, O. Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
topic_facet |
deformation GPS Krafla rifting Tjörnes transform zone [SDU]Sciences of the Universe [physics] |
description |
International audience The current tectonics of North Iceland are characterized by rifting episodes along fissure swarms and by ML 6–7 earthquakes in the transform zone between the northern rift zone and the Kolbeinsey Ridge north of Iceland. The last rifting period (1975–1984) was associated with an average opening of 5 m along the Krafla fissure swarm. Post-rifting deformation has been revealed by GPS investigations in Northern Iceland. A GPS network was occupied in 1997, 1999 and 2002 to quantify present-day displacements and their variation with time, on both sides of the on-land part of the Húsavík–Flatey fault and around the Krafla fissure swarm. The main deformational features observed are: (1) decrease in spreading velocities between the two timespans 1997–1999 and 1999–2002, (2) the existence, south of the transform zone, of a well-defined ∼20–30-km-wide plate boundary where extension dominates, (3) directly adjacent east and west rift shoulders where displacements are close to those observed on the Eurasian and North American plates and (4) a displacement gradient on Tjörnes that could correspond either to elastic deformation related to a currently locked dextral strike-slip fault or to an attenuated post-rifting effect northwest of Krafla. |
author2 |
Laboratoire de Géodynamique des Chaines Alpines (LGCA) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Jouanne, François Villemin, Thierry Berger, A. Henriot, O. |
author_facet |
Jouanne, François Villemin, Thierry Berger, A. Henriot, O. |
author_sort |
Jouanne, François |
title |
Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
title_short |
Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
title_full |
Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
title_fullStr |
Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
title_full_unstemmed |
Rift-transform junction in North Iceland: rigid blocks and narrow accommodation zones revealed by GPS 1997–1999–2002 |
title_sort |
rift-transform junction in north iceland: rigid blocks and narrow accommodation zones revealed by gps 1997–1999–2002 |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295/document https://hal-insu.archives-ouvertes.fr/insu-00353295/file/167-3-1439.pdf https://doi.org/10.1111/j.1365-246X.2006.03107.x |
long_lat |
ENVELOPE(-18.687,-18.687,67.149,67.149) ENVELOPE(-16.917,-16.917,68.833,68.833) ENVELOPE(-16.747,-16.747,65.713,65.713) ENVELOPE(-17.087,-17.087,66.152,66.152) |
geographic |
Kolbeinsey Kolbeinsey Ridge Krafla Tjörnes |
geographic_facet |
Kolbeinsey Kolbeinsey Ridge Krafla Tjörnes |
genre |
Húsavík Iceland Kolbeinsey Flatey |
genre_facet |
Húsavík Iceland Kolbeinsey Flatey |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal-insu.archives-ouvertes.fr/insu-00353295 Geophysical Journal International, Oxford University Press (OUP), 2006, 167 (3), pp.1439 à 1446. ⟨10.1111/j.1365-246X.2006.03107.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2006.03107.x insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295 https://hal-insu.archives-ouvertes.fr/insu-00353295/document https://hal-insu.archives-ouvertes.fr/insu-00353295/file/167-3-1439.pdf doi:10.1111/j.1365-246X.2006.03107.x |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2006.03107.x |
container_title |
Geophysical Journal International |
container_volume |
167 |
container_issue |
3 |
container_start_page |
1439 |
op_container_end_page |
1446 |
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1766026673098063872 |