Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean)
International audience The Amsterdam-St. Paul (ASP) plateau is located in the central part of the Indian Ocean and results from the interaction between the ASP hot spot and the Southeast Indian Ridge (SEIR). It is located near the diffuse boundary between the Capricorn and Australian plates. The sea...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00609477 https://insu.hal.science/insu-00609477/document https://insu.hal.science/insu-00609477/file/JGR-Janin-2011.pdf https://doi.org/10.1029/2010JB007800 |
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openpolar |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
ridge-hot spot interaction K‐Ar geochronology hot spot SEIR Indian Ocean Capricorn plate [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
ridge-hot spot interaction K‐Ar geochronology hot spot SEIR Indian Ocean Capricorn plate [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Janin, Myriam Hémond, Christophe, C Guillou, Hervé Maia, Marcia Johnson, M. K. T. Bollinger, Claire Liorzou, Céline, C. Mudholkar, A. Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
topic_facet |
ridge-hot spot interaction K‐Ar geochronology hot spot SEIR Indian Ocean Capricorn plate [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The Amsterdam-St. Paul (ASP) plateau is located in the central part of the Indian Ocean and results from the interaction between the ASP hot spot and the Southeast Indian Ridge (SEIR). It is located near the diffuse boundary between the Capricorn and Australian plates. The seamount chain of the Dead Poets (CDP) is northeast of the ASP plateau and may represent older volcanism related to the ASP hot spot; this chain consists of two groups of seamounts: (1) large flat‐topped seamounts formed 8-10 Ma and (2) smaller conical seamounts formed during the last 2 Myr. The ASP hot spot has produced two pulses of magmatism that have been ponded under the ASP plateau and erupted along the divergent boundary between the Capricorn and Australian plates. The N65° orientation of the CDP as well as the seamount's elongated shapes support an opening motion between the Capricorn and Australian plates along a suture oriented in the N155° direction. This motion compared to the Antarctic plate amounts to an apparent velocity of 7.7 cm/yr northeastward for the Capricorn‐Australian block. This motion does not fit with a fixed plume model. We suggest, therefore, that the ASP plume experienced a motion of about 1-2 cm/yr to the SW, which is opposite to the asthenospheric flow in this region and suggests a deep‐seated plume. |
author2 |
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 des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) School of ocean and earth science and technology University of Hawai‘i Mānoa (UHM) CSIR National Institute of Oceanography India (NIO) programmes SEDIT et EXTRAPLAC |
format |
Article in Journal/Newspaper |
author |
Janin, Myriam Hémond, Christophe, C Guillou, Hervé Maia, Marcia Johnson, M. K. T. Bollinger, Claire Liorzou, Céline, C. Mudholkar, A. |
author_facet |
Janin, Myriam Hémond, Christophe, C Guillou, Hervé Maia, Marcia Johnson, M. K. T. Bollinger, Claire Liorzou, Céline, C. Mudholkar, A. |
author_sort |
Janin, Myriam |
title |
Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
title_short |
Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
title_full |
Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
title_fullStr |
Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
title_full_unstemmed |
Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) |
title_sort |
hot spot activity and tectonic settings near amsterdam-st. paul plateau (indian ocean) |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://insu.hal.science/insu-00609477 https://insu.hal.science/insu-00609477/document https://insu.hal.science/insu-00609477/file/JGR-Janin-2011.pdf https://doi.org/10.1029/2010JB007800 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://insu.hal.science/insu-00609477 Journal of Geophysical Research : Solid Earth, 2011, 116 (B5), pp.B05206. ⟨10.1029/2010JB007800⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JB007800 insu-00609477 https://insu.hal.science/insu-00609477 https://insu.hal.science/insu-00609477/document https://insu.hal.science/insu-00609477/file/JGR-Janin-2011.pdf doi:10.1029/2010JB007800 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010JB007800 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
B5 |
_version_ |
1797573020929228800 |
spelling |
ftinsu:oai:HAL:insu-00609477v1 2024-04-28T08:01:08+00:00 Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) Janin, Myriam Hémond, Christophe, C Guillou, Hervé Maia, Marcia Johnson, M. K. T. Bollinger, Claire Liorzou, Céline, C. Mudholkar, A. 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 des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) School of ocean and earth science and technology University of Hawai‘i Mānoa (UHM) CSIR National Institute of Oceanography India (NIO) programmes SEDIT et EXTRAPLAC 2011-05-20 https://insu.hal.science/insu-00609477 https://insu.hal.science/insu-00609477/document https://insu.hal.science/insu-00609477/file/JGR-Janin-2011.pdf https://doi.org/10.1029/2010JB007800 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JB007800 insu-00609477 https://insu.hal.science/insu-00609477 https://insu.hal.science/insu-00609477/document https://insu.hal.science/insu-00609477/file/JGR-Janin-2011.pdf doi:10.1029/2010JB007800 info:eu-repo/semantics/OpenAccess ISSN: 2169-9313 EISSN: 2169-9356 Journal of Geophysical Research : Solid Earth https://insu.hal.science/insu-00609477 Journal of Geophysical Research : Solid Earth, 2011, 116 (B5), pp.B05206. ⟨10.1029/2010JB007800⟩ ridge-hot spot interaction K‐Ar geochronology hot spot SEIR Indian Ocean Capricorn plate [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.1029/2010JB007800 2024-04-05T00:24:13Z International audience The Amsterdam-St. Paul (ASP) plateau is located in the central part of the Indian Ocean and results from the interaction between the ASP hot spot and the Southeast Indian Ridge (SEIR). It is located near the diffuse boundary between the Capricorn and Australian plates. The seamount chain of the Dead Poets (CDP) is northeast of the ASP plateau and may represent older volcanism related to the ASP hot spot; this chain consists of two groups of seamounts: (1) large flat‐topped seamounts formed 8-10 Ma and (2) smaller conical seamounts formed during the last 2 Myr. The ASP hot spot has produced two pulses of magmatism that have been ponded under the ASP plateau and erupted along the divergent boundary between the Capricorn and Australian plates. The N65° orientation of the CDP as well as the seamount's elongated shapes support an opening motion between the Capricorn and Australian plates along a suture oriented in the N155° direction. This motion compared to the Antarctic plate amounts to an apparent velocity of 7.7 cm/yr northeastward for the Capricorn‐Australian block. This motion does not fit with a fixed plume model. We suggest, therefore, that the ASP plume experienced a motion of about 1-2 cm/yr to the SW, which is opposite to the asthenospheric flow in this region and suggests a deep‐seated plume. Article in Journal/Newspaper Antarc* Antarctic Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research 116 B5 |