The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup
International audience The rifted continental margins of Mozambique provide excellent examples of continental passive margins with a significant structural variability associated with magmatism and inheritance. Despite accumulated knowledge, the tectonic structure and nature of the crust beneath the...
Published in: | Tectonics |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-03445510 https://insu.hal.science/insu-03445510/document https://insu.hal.science/insu-03445510/file/Tectonics%20-%202021%20-%20Roche%20-%20The%20Limpopo%20Magma.pdf https://doi.org/10.1029/2021TC006914 |
id |
ftsorbonneuniv:oai:HAL:insu-03445510v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Transform margin magmatism strike-slip system pull-apart Mozambique Seismic reflection [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
Transform margin magmatism strike-slip system pull-apart Mozambique Seismic reflection [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics Roche, Vincent Leroy, Sylvie Guillocheau, François Revillon, Sidonie Ruffet, Gilles Watremez, Louise D’acremont, E. Nonn, C. Vetel, W. Despinois, F. The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
topic_facet |
Transform margin magmatism strike-slip system pull-apart Mozambique Seismic reflection [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
International audience The rifted continental margins of Mozambique provide excellent examples of continental passive margins with a significant structural variability associated with magmatism and inheritance. Despite accumulated knowledge, the tectonic structure and nature of the crust beneath the South Mozambique Coastal Plain (SMCP) are still poorly known. This study interprets high-resolution seismic reflection data paired with data from industry-drilled wells and proposes a structural model of the Limpopo transform margin in a magma-rich context. Results indicate that the Limpopo transform margin is characterized by an ocean-continent transition that links the Beira-High and Natal valley margin segments and represents the western limit of the continental crust, separating continental volcano-sedimentary infilled grabens from the oceanic crust domain. These basins result from the emplacement of the Karoo Supergroup during a Permo-Triassic tectonic event, followed by an Early Jurassic tectonic and magmatic event. This latter led to the establishment of steady-state seafloor spreading at ca.156 Ma along the SMCP. A Late Jurassic to Early Cretaceous event corresponds to formation of the Limpopo transform fault zone. Which accommodated the SSE-ward displacement of Antarctica with respect to Africa. We define a new type of margin: the magma-rich transform margin, characterized by the presence of voluminous magmatic extrusion and intrusion coincident with the formation and evolution of the transform margin. The Limpopo transform fault zone consists of several syn-transfer and -transform faults rather than a single transform fault. The intense magmatic activity was associated primarily with mantle dynamics, which controlled the large-scale differential subsidence along the transform margin. |
author2 |
Institut des Sciences de la Terre de Paris (iSTeP) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Centre scientifique et Technique Jean Feger (CSTJF) TOTAL FINA ELF PAMELA project (PAssive Margin Exploration Laboratories) (IFREMER, TotalEnergies) Sorbonne University |
format |
Article in Journal/Newspaper |
author |
Roche, Vincent Leroy, Sylvie Guillocheau, François Revillon, Sidonie Ruffet, Gilles Watremez, Louise D’acremont, E. Nonn, C. Vetel, W. Despinois, F. |
author_facet |
Roche, Vincent Leroy, Sylvie Guillocheau, François Revillon, Sidonie Ruffet, Gilles Watremez, Louise D’acremont, E. Nonn, C. Vetel, W. Despinois, F. |
author_sort |
Roche, Vincent |
title |
The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
title_short |
The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
title_full |
The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
title_fullStr |
The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
title_full_unstemmed |
The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup |
title_sort |
limpopo magma‐rich transform margin, south mozambique – part 2: implications for the gondwana breakup |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03445510 https://insu.hal.science/insu-03445510/document https://insu.hal.science/insu-03445510/file/Tectonics%20-%202021%20-%20Roche%20-%20The%20Limpopo%20Magma.pdf https://doi.org/10.1029/2021TC006914 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0278-7407 EISSN: 1944-9194 Tectonics https://insu.hal.science/insu-03445510 Tectonics, 2021, 40 (12), pp.e2021TC006914. ⟨10.1029/2021TC006914⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021TC006914 insu-03445510 https://insu.hal.science/insu-03445510 https://insu.hal.science/insu-03445510/document https://insu.hal.science/insu-03445510/file/Tectonics%20-%202021%20-%20Roche%20-%20The%20Limpopo%20Magma.pdf doi:10.1029/2021TC006914 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021TC006914 |
container_title |
Tectonics |
container_volume |
40 |
container_issue |
12 |
_version_ |
1802647422434803712 |
spelling |
ftsorbonneuniv:oai:HAL:insu-03445510v1 2024-06-23T07:46:40+00:00 The Limpopo magma‐rich transform margin, South Mozambique – part 2: Implications for the Gondwana breakup Roche, Vincent Leroy, Sylvie Guillocheau, François Revillon, Sidonie Ruffet, Gilles Watremez, Louise D’acremont, E. Nonn, C. Vetel, W. Despinois, F. Institut des Sciences de la Terre de Paris (iSTeP) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Centre scientifique et Technique Jean Feger (CSTJF) TOTAL FINA ELF PAMELA project (PAssive Margin Exploration Laboratories) (IFREMER, TotalEnergies) Sorbonne University 2021-12 https://insu.hal.science/insu-03445510 https://insu.hal.science/insu-03445510/document https://insu.hal.science/insu-03445510/file/Tectonics%20-%202021%20-%20Roche%20-%20The%20Limpopo%20Magma.pdf https://doi.org/10.1029/2021TC006914 en eng HAL CCSD American Geophysical Union (AGU) info:eu-repo/semantics/altIdentifier/doi/10.1029/2021TC006914 insu-03445510 https://insu.hal.science/insu-03445510 https://insu.hal.science/insu-03445510/document https://insu.hal.science/insu-03445510/file/Tectonics%20-%202021%20-%20Roche%20-%20The%20Limpopo%20Magma.pdf doi:10.1029/2021TC006914 info:eu-repo/semantics/OpenAccess ISSN: 0278-7407 EISSN: 1944-9194 Tectonics https://insu.hal.science/insu-03445510 Tectonics, 2021, 40 (12), pp.e2021TC006914. ⟨10.1029/2021TC006914⟩ Transform margin magmatism strike-slip system pull-apart Mozambique Seismic reflection [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/article Journal articles 2021 ftsorbonneuniv https://doi.org/10.1029/2021TC006914 2024-06-06T23:47:15Z International audience The rifted continental margins of Mozambique provide excellent examples of continental passive margins with a significant structural variability associated with magmatism and inheritance. Despite accumulated knowledge, the tectonic structure and nature of the crust beneath the South Mozambique Coastal Plain (SMCP) are still poorly known. This study interprets high-resolution seismic reflection data paired with data from industry-drilled wells and proposes a structural model of the Limpopo transform margin in a magma-rich context. Results indicate that the Limpopo transform margin is characterized by an ocean-continent transition that links the Beira-High and Natal valley margin segments and represents the western limit of the continental crust, separating continental volcano-sedimentary infilled grabens from the oceanic crust domain. These basins result from the emplacement of the Karoo Supergroup during a Permo-Triassic tectonic event, followed by an Early Jurassic tectonic and magmatic event. This latter led to the establishment of steady-state seafloor spreading at ca.156 Ma along the SMCP. A Late Jurassic to Early Cretaceous event corresponds to formation of the Limpopo transform fault zone. Which accommodated the SSE-ward displacement of Antarctica with respect to Africa. We define a new type of margin: the magma-rich transform margin, characterized by the presence of voluminous magmatic extrusion and intrusion coincident with the formation and evolution of the transform margin. The Limpopo transform fault zone consists of several syn-transfer and -transform faults rather than a single transform fault. The intense magmatic activity was associated primarily with mantle dynamics, which controlled the large-scale differential subsidence along the transform margin. Article in Journal/Newspaper Antarc* Antarctica HAL Sorbonne Université Tectonics 40 12 |