Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands
International audience The syenitic rocks of South Rallier du Baty Intrusive Complex (SRBIC) represent in- trusions into the oceanic plateau basalts of the south-western Kerguelen Islands. The SRBIC was previously interpreted as a typical ring complex due to magma emplace- ment with cauldron subside...
Published in: | Terra Nova |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.science/hal-03024359 https://hal.science/hal-03024359/document https://hal.science/hal-03024359/file/2020-Ponthusetal-SRBIC%20%281%29.pdf https://doi.org/10.1111/ter.12471 |
id |
ftclermontuniv:oai:HAL:hal-03024359v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
language |
English |
topic |
alkaline magmatism Kerguelen oceanic plateau pluton emplacement syenite intrusion [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography |
spellingShingle |
alkaline magmatism Kerguelen oceanic plateau pluton emplacement syenite intrusion [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography Ponthus, Léandre de Saint Blanquat, Michel Guillaume, Damien Le Romancer, Marc Pearson, Norman O'Reilly, Suzanne Grégoire, Michel Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
topic_facet |
alkaline magmatism Kerguelen oceanic plateau pluton emplacement syenite intrusion [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography |
description |
International audience The syenitic rocks of South Rallier du Baty Intrusive Complex (SRBIC) represent in- trusions into the oceanic plateau basalts of the south-western Kerguelen Islands. The SRBIC was previously interpreted as a typical ring complex due to magma emplace- ment with cauldron subsidence. Our new structural and geochronological data reveal that it is a laccolith built between 11.6 and 7.9 Ma by successive injections of magma sheets around the crust–mantle boundary, with an average injection rate between 0.8 and 1.4 × 10−4 km3/year. These results establish strong similarities between the SRBIC, the only recorded example of a felsic laccolith in an oceanic intraplate setting, and many continental plutons emplaced in various geodynamic setting. The SRBIC thus has the characteristics of a continental plutonic complex emplaced in an oceanic plateau crust. We postulate the critical parameter relevant to causing such similari- ties and plutonic magmatism is crustal thickness. |
author2 |
Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Géoarchitecture : Territoires, Urbanisation, Biodiversité, Environnement Université de Rennes (UR)-Université de Brest (UBO) Macquarie University Sydney Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique |
format |
Article in Journal/Newspaper |
author |
Ponthus, Léandre de Saint Blanquat, Michel Guillaume, Damien Le Romancer, Marc Pearson, Norman O'Reilly, Suzanne Grégoire, Michel |
author_facet |
Ponthus, Léandre de Saint Blanquat, Michel Guillaume, Damien Le Romancer, Marc Pearson, Norman O'Reilly, Suzanne Grégoire, Michel |
author_sort |
Ponthus, Léandre |
title |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
title_short |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
title_full |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
title_fullStr |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
title_full_unstemmed |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
title_sort |
plutonic processes in transitional oceanic plateau crust: structure, age and emplacement of the south rallier du baty laccolith, kerguelen islands |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03024359 https://hal.science/hal-03024359/document https://hal.science/hal-03024359/file/2020-Ponthusetal-SRBIC%20%281%29.pdf https://doi.org/10.1111/ter.12471 |
long_lat |
ENVELOPE(69.804,69.804,-49.285,-49.285) |
geographic |
Kerguelen Kerguelen Islands Rallier du Baty |
geographic_facet |
Kerguelen Kerguelen Islands Rallier du Baty |
genre |
Kerguelen Islands |
genre_facet |
Kerguelen Islands |
op_source |
ISSN: 0954-4879 EISSN: 1365-3121 Terra Nova https://hal.science/hal-03024359 Terra Nova, 2020, 32 (6), pp.408-414. ⟨10.1111/ter.12471⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/ter.12471 hal-03024359 https://hal.science/hal-03024359 https://hal.science/hal-03024359/document https://hal.science/hal-03024359/file/2020-Ponthusetal-SRBIC%20%281%29.pdf doi:10.1111/ter.12471 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/ter.12471 |
container_title |
Terra Nova |
container_volume |
32 |
container_issue |
6 |
container_start_page |
408 |
op_container_end_page |
414 |
_version_ |
1802646469592743936 |
spelling |
ftclermontuniv:oai:HAL:hal-03024359v1 2024-06-23T07:54:20+00:00 Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands Construction des plutons dans une croûte océanique transitionnelle : structure, âge et mise en place du laccolithe de Rallier du Baty Sud, Iles Kerguelen Ponthus, Léandre de Saint Blanquat, Michel Guillaume, Damien Le Romancer, Marc Pearson, Norman O'Reilly, Suzanne Grégoire, Michel Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Laboratoire Magmas et Volcans (LMV) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Géoarchitecture : Territoires, Urbanisation, Biodiversité, Environnement Université de Rennes (UR)-Université de Brest (UBO) Macquarie University Sydney Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique 2020-12 https://hal.science/hal-03024359 https://hal.science/hal-03024359/document https://hal.science/hal-03024359/file/2020-Ponthusetal-SRBIC%20%281%29.pdf https://doi.org/10.1111/ter.12471 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1111/ter.12471 hal-03024359 https://hal.science/hal-03024359 https://hal.science/hal-03024359/document https://hal.science/hal-03024359/file/2020-Ponthusetal-SRBIC%20%281%29.pdf doi:10.1111/ter.12471 info:eu-repo/semantics/OpenAccess ISSN: 0954-4879 EISSN: 1365-3121 Terra Nova https://hal.science/hal-03024359 Terra Nova, 2020, 32 (6), pp.408-414. ⟨10.1111/ter.12471⟩ alkaline magmatism Kerguelen oceanic plateau pluton emplacement syenite intrusion [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography info:eu-repo/semantics/article Journal articles 2020 ftclermontuniv https://doi.org/10.1111/ter.12471 2024-06-11T00:01:32Z International audience The syenitic rocks of South Rallier du Baty Intrusive Complex (SRBIC) represent in- trusions into the oceanic plateau basalts of the south-western Kerguelen Islands. The SRBIC was previously interpreted as a typical ring complex due to magma emplace- ment with cauldron subsidence. Our new structural and geochronological data reveal that it is a laccolith built between 11.6 and 7.9 Ma by successive injections of magma sheets around the crust–mantle boundary, with an average injection rate between 0.8 and 1.4 × 10−4 km3/year. These results establish strong similarities between the SRBIC, the only recorded example of a felsic laccolith in an oceanic intraplate setting, and many continental plutons emplaced in various geodynamic setting. The SRBIC thus has the characteristics of a continental plutonic complex emplaced in an oceanic plateau crust. We postulate the critical parameter relevant to causing such similari- ties and plutonic magmatism is crustal thickness. Article in Journal/Newspaper Kerguelen Islands HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Kerguelen Kerguelen Islands Rallier du Baty ENVELOPE(69.804,69.804,-49.285,-49.285) Terra Nova 32 6 408 414 |