Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach
International audience In order to investigate the impact of orogenic inheritance on the characteristics of hyperextended rift systems we develop new mapping methods highlighting the first-order architecture and timing of hyperextended rifts, as well as the distribution of heterogeneities inherited...
Published in: | Journal of the Geological Society |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.science/hal-01213215 https://hal.science/hal-01213215/document https://hal.science/hal-01213215/file/Chenin%26al2015_unformatted.pdf https://doi.org/10.1144/jgs2014-139 |
id |
ftinsu:oai:HAL:hal-01213215v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-01213215v1 2023-06-18T03:41:52+02:00 Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach Chenin, Pauline Manatschal, Gianreto Lavier, L.L. Erratt, Duncan Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Geophysics Austin (IG) University of Texas at Austin Austin CEIBA project (Exxon Mobil) 2015-09-09 https://hal.science/hal-01213215 https://hal.science/hal-01213215/document https://hal.science/hal-01213215/file/Chenin%26al2015_unformatted.pdf https://doi.org/10.1144/jgs2014-139 en eng HAL CCSD Geological Society of London info:eu-repo/semantics/altIdentifier/doi/10.1144/jgs2014-139 hal-01213215 https://hal.science/hal-01213215 https://hal.science/hal-01213215/document https://hal.science/hal-01213215/file/Chenin%26al2015_unformatted.pdf doi:10.1144/jgs2014-139 info:eu-repo/semantics/OpenAccess Journal of the Geological Society of London https://hal.science/hal-01213215 Journal of the Geological Society of London, 2015, ⟨10.1144/jgs2014-139⟩ rift hyperextended tectonic mapping North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.1144/jgs2014-139 2023-06-05T23:42:42Z International audience In order to investigate the impact of orogenic inheritance on the characteristics of hyperextended rift systems we develop new mapping methods highlighting the first-order architecture and timing of hyperextended rifts, as well as the distribution of heterogeneities inherited from previous orogenies. We use these to characterize the North Atlantic rift system and adjacent areas affected by the Palaeozoic Caledonian and Variscan orogenies. Comparison of these maps demonstrates major differences in the behaviour of the North Atlantic rift relative to both orogens, the Variscan front appearing to be a major limit. Indeed, the rift cuts through the Caledonian orogen and parallels its structural grain, while it circumvents the core of the Variscides. In addition, rifting is protracted and polyphase, and breakup is magma-rich North to the Variscan front, as opposed to the South where a single, apparently continuous extensional event lead to magma-poor breakup in less than 50 Myr. These observations point to a major influence of orogenic inheritance on the characteristics of hyperextended rift systems. On the other hand, our study supports that rifts reactivate sutures corresponding to former large (> 2 000 km) oceans, while leaving sutures of small (< 500 – 1 000 km) oceanic basins little affected, suggesting a significant impact of the pre-orogenic histories on subsequent extensional processes. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Journal of the Geological Society 172 6 711 720 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
rift hyperextended tectonic mapping North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
rift hyperextended tectonic mapping North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Chenin, Pauline Manatschal, Gianreto Lavier, L.L. Erratt, Duncan Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
topic_facet |
rift hyperextended tectonic mapping North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
International audience In order to investigate the impact of orogenic inheritance on the characteristics of hyperextended rift systems we develop new mapping methods highlighting the first-order architecture and timing of hyperextended rifts, as well as the distribution of heterogeneities inherited from previous orogenies. We use these to characterize the North Atlantic rift system and adjacent areas affected by the Palaeozoic Caledonian and Variscan orogenies. Comparison of these maps demonstrates major differences in the behaviour of the North Atlantic rift relative to both orogens, the Variscan front appearing to be a major limit. Indeed, the rift cuts through the Caledonian orogen and parallels its structural grain, while it circumvents the core of the Variscides. In addition, rifting is protracted and polyphase, and breakup is magma-rich North to the Variscan front, as opposed to the South where a single, apparently continuous extensional event lead to magma-poor breakup in less than 50 Myr. These observations point to a major influence of orogenic inheritance on the characteristics of hyperextended rift systems. On the other hand, our study supports that rifts reactivate sutures corresponding to former large (> 2 000 km) oceans, while leaving sutures of small (< 500 – 1 000 km) oceanic basins little affected, suggesting a significant impact of the pre-orogenic histories on subsequent extensional processes. |
author2 |
Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Geophysics Austin (IG) University of Texas at Austin Austin CEIBA project (Exxon Mobil) |
format |
Article in Journal/Newspaper |
author |
Chenin, Pauline Manatschal, Gianreto Lavier, L.L. Erratt, Duncan |
author_facet |
Chenin, Pauline Manatschal, Gianreto Lavier, L.L. Erratt, Duncan |
author_sort |
Chenin, Pauline |
title |
Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
title_short |
Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
title_full |
Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
title_fullStr |
Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
title_full_unstemmed |
Assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the North Atlantic rift system: a mapping approach |
title_sort |
assessing the impact of orogenic inheritance on the architecture, timing and magmatic budget of the north atlantic rift system: a mapping approach |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01213215 https://hal.science/hal-01213215/document https://hal.science/hal-01213215/file/Chenin%26al2015_unformatted.pdf https://doi.org/10.1144/jgs2014-139 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of the Geological Society of London https://hal.science/hal-01213215 Journal of the Geological Society of London, 2015, ⟨10.1144/jgs2014-139⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1144/jgs2014-139 hal-01213215 https://hal.science/hal-01213215 https://hal.science/hal-01213215/document https://hal.science/hal-01213215/file/Chenin%26al2015_unformatted.pdf doi:10.1144/jgs2014-139 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1144/jgs2014-139 |
container_title |
Journal of the Geological Society |
container_volume |
172 |
container_issue |
6 |
container_start_page |
711 |
op_container_end_page |
720 |
_version_ |
1769007583088082944 |