The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere
International audience The tectonic evolution of the Southeast Indian Ridge (SEIR), and in particular of its easternmost edge, has not been constrained by high-resolution shipboard data and therefore the kinematic details of its behavior are uncertain. Using new shipboard magnetic data obtained by R...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03748832 https://doi.org/10.1016/j.epsl.2017.08.035 |
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ftccsdartic:oai:HAL:insu-03748832v1 2023-05-15T13:54:02+02:00 The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere Choi, Hakkyum Kim, Seung-Sep Dyment, Jérôme Granot, Roi Park, Sung-Hyun Hong, Jong Kuk Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) 2017 https://hal-insu.archives-ouvertes.fr/insu-03748832 https://doi.org/10.1016/j.epsl.2017.08.035 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2017.08.035 insu-03748832 https://hal-insu.archives-ouvertes.fr/insu-03748832 BIBCODE: 2017E&PSL.478.132C doi:10.1016/j.epsl.2017.08.035 ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-03748832 Earth and Planetary Science Letters, 2017, 478, pp.132-142. ⟨10.1016/j.epsl.2017.08.035⟩ marine magnetics tectonics plate reconstruction Macquarie Plate [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1016/j.epsl.2017.08.035 2023-03-19T04:10:11Z International audience The tectonic evolution of the Southeast Indian Ridge (SEIR), and in particular of its easternmost edge, has not been constrained by high-resolution shipboard data and therefore the kinematic details of its behavior are uncertain. Using new shipboard magnetic data obtained by R/VIB Araon and M/V L'Astrolabe along the easternmost SEIR and available archived magnetic data, we estimated the finite rotation parameters of the Macquarie-Antarctic and Australian-Antarctic motions for eight anomalies (1o, 2, 2Ay, 2Ao, 3y, 3o, 3Ay, and 3Ao). These new finite rotations indicate that the Macquarie Plate since its creation ∼6.24 million years ago behaved as an independent and rigid plate, confirming previous estimates. The change in the Australian-Antarctic spreading direction from N-S to NW-SE appears to coincide with the formation of the Macquarie Plate at ∼6.24 Ma. Analysis of the estimated plate motions indicates that the initiation and growth stages of the Macquarie Plate resemble the kinematic evolution of other microplates and continental breakup, whereby a rapid acceleration in angular velocity took place after its initial formation, followed by a slow decay, suggesting that a decrease in the resistive strength force might have played a significant role in the kinematic evolution of the microplate. The motions of the Macquarie Plate during its growth stages may have been further enhanced by the increased subducting rates along the Hjort Trench, while the Macquarie Plate has exhibited constant growth by seafloor spreading. Article in Journal/Newspaper Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Hjort Trench ENVELOPE(157.500,157.500,-58.000,-58.000) Indian Southeast Indian Ridge ENVELOPE(110.000,110.000,-50.000,-50.000) Earth and Planetary Science Letters 478 132 142 |
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 |
marine magnetics tectonics plate reconstruction Macquarie Plate [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
marine magnetics tectonics plate reconstruction Macquarie Plate [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Choi, Hakkyum Kim, Seung-Sep Dyment, Jérôme Granot, Roi Park, Sung-Hyun Hong, Jong Kuk The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
topic_facet |
marine magnetics tectonics plate reconstruction Macquarie Plate [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The tectonic evolution of the Southeast Indian Ridge (SEIR), and in particular of its easternmost edge, has not been constrained by high-resolution shipboard data and therefore the kinematic details of its behavior are uncertain. Using new shipboard magnetic data obtained by R/VIB Araon and M/V L'Astrolabe along the easternmost SEIR and available archived magnetic data, we estimated the finite rotation parameters of the Macquarie-Antarctic and Australian-Antarctic motions for eight anomalies (1o, 2, 2Ay, 2Ao, 3y, 3o, 3Ay, and 3Ao). These new finite rotations indicate that the Macquarie Plate since its creation ∼6.24 million years ago behaved as an independent and rigid plate, confirming previous estimates. The change in the Australian-Antarctic spreading direction from N-S to NW-SE appears to coincide with the formation of the Macquarie Plate at ∼6.24 Ma. Analysis of the estimated plate motions indicates that the initiation and growth stages of the Macquarie Plate resemble the kinematic evolution of other microplates and continental breakup, whereby a rapid acceleration in angular velocity took place after its initial formation, followed by a slow decay, suggesting that a decrease in the resistive strength force might have played a significant role in the kinematic evolution of the microplate. The motions of the Macquarie Plate during its growth stages may have been further enhanced by the increased subducting rates along the Hjort Trench, while the Macquarie Plate has exhibited constant growth by seafloor spreading. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Choi, Hakkyum Kim, Seung-Sep Dyment, Jérôme Granot, Roi Park, Sung-Hyun Hong, Jong Kuk |
author_facet |
Choi, Hakkyum Kim, Seung-Sep Dyment, Jérôme Granot, Roi Park, Sung-Hyun Hong, Jong Kuk |
author_sort |
Choi, Hakkyum |
title |
The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
title_short |
The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
title_full |
The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
title_fullStr |
The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
title_full_unstemmed |
The kinematic evolution of the Macquarie Plate: A case study for the fragmentation of oceanic lithosphere |
title_sort |
kinematic evolution of the macquarie plate: a case study for the fragmentation of oceanic lithosphere |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03748832 https://doi.org/10.1016/j.epsl.2017.08.035 |
long_lat |
ENVELOPE(157.500,157.500,-58.000,-58.000) ENVELOPE(110.000,110.000,-50.000,-50.000) |
geographic |
Antarctic Hjort Trench Indian Southeast Indian Ridge |
geographic_facet |
Antarctic Hjort Trench Indian Southeast Indian Ridge |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-03748832 Earth and Planetary Science Letters, 2017, 478, pp.132-142. ⟨10.1016/j.epsl.2017.08.035⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2017.08.035 insu-03748832 https://hal-insu.archives-ouvertes.fr/insu-03748832 BIBCODE: 2017E&PSL.478.132C doi:10.1016/j.epsl.2017.08.035 |
op_doi |
https://doi.org/10.1016/j.epsl.2017.08.035 |
container_title |
Earth and Planetary Science Letters |
container_volume |
478 |
container_start_page |
132 |
op_container_end_page |
142 |
_version_ |
1766259545384943616 |