Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space
International audience Density heterogeneities in the mantle influence the dynamics of mantle upwellings and therefore modify plume characteristics. Using analog laboratory experiments, we explore the dynamics of ``thermo-chemical'' plumes containing both thermal and chemical density anoma...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713/document https://hal-insu.archives-ouvertes.fr/insu-03603713/file/Geophysical%20Research%20Letters%20-%202008%20-%20Kumagai%20-%20Mantle%20plumes%20Thin%20fat%20successful%20or%20failing%20Constraints%20to%20explain.pdf https://doi.org/10.1029/2008GL035079 |
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ftinsu:oai:HAL:insu-03603713v1 2023-06-18T03:41:22+02:00 Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space Kumagai, Ichiro Davaille, Anne Kurita, Kei Stutzmann, Eléonore Fluides, automatique, systèmes thermiques (FAST) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) 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) 2008 https://hal-insu.archives-ouvertes.fr/insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713/document https://hal-insu.archives-ouvertes.fr/insu-03603713/file/Geophysical%20Research%20Letters%20-%202008%20-%20Kumagai%20-%20Mantle%20plumes%20Thin%20fat%20successful%20or%20failing%20Constraints%20to%20explain.pdf https://doi.org/10.1029/2008GL035079 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL035079 insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713/document https://hal-insu.archives-ouvertes.fr/insu-03603713/file/Geophysical%20Research%20Letters%20-%202008%20-%20Kumagai%20-%20Mantle%20plumes%20Thin%20fat%20successful%20or%20failing%20Constraints%20to%20explain.pdf BIBCODE: 2008GeoRL.3516301K doi:10.1029/2008GL035079 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03603713 Geophysical Research Letters, 2008, 35, ⟨10.1029/2008GL035079⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2008 ftinsu https://doi.org/10.1029/2008GL035079 2023-06-05T20:47:28Z International audience Density heterogeneities in the mantle influence the dynamics of mantle upwellings and therefore modify plume characteristics. Using analog laboratory experiments, we explore the dynamics of ``thermo-chemical'' plumes containing both thermal and chemical density anomalies inherited from a stratified boundary layer at the base of the mantle. Because all plumes cool by thermal diffusion as they rise, a chemically composite thermal plume will eventually attain a level of neutral buoyancy, at which it will begin to ``fail''. Separation within the plume will occur, whereby the chemically denser material will start to sink back while the heated surrounding mantle keeps rising. It more generally implies that 1) mantle plumes are not necessarily narrow and continuous throughout the mantle but can be fat and patchy such as Iceland, 2) a hot mantle region may not be buoyant and rising, but on contrary may be sinking, and 3) mantle plumes dynamics are strongly time-dependent. Article in Journal/Newspaper Iceland Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 35 16 |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Kumagai, Ichiro Davaille, Anne Kurita, Kei Stutzmann, Eléonore Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Density heterogeneities in the mantle influence the dynamics of mantle upwellings and therefore modify plume characteristics. Using analog laboratory experiments, we explore the dynamics of ``thermo-chemical'' plumes containing both thermal and chemical density anomalies inherited from a stratified boundary layer at the base of the mantle. Because all plumes cool by thermal diffusion as they rise, a chemically composite thermal plume will eventually attain a level of neutral buoyancy, at which it will begin to ``fail''. Separation within the plume will occur, whereby the chemically denser material will start to sink back while the heated surrounding mantle keeps rising. It more generally implies that 1) mantle plumes are not necessarily narrow and continuous throughout the mantle but can be fat and patchy such as Iceland, 2) a hot mantle region may not be buoyant and rising, but on contrary may be sinking, and 3) mantle plumes dynamics are strongly time-dependent. |
author2 |
Fluides, automatique, systèmes thermiques (FAST) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) 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 |
Kumagai, Ichiro Davaille, Anne Kurita, Kei Stutzmann, Eléonore |
author_facet |
Kumagai, Ichiro Davaille, Anne Kurita, Kei Stutzmann, Eléonore |
author_sort |
Kumagai, Ichiro |
title |
Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
title_short |
Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
title_full |
Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
title_fullStr |
Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
title_full_unstemmed |
Mantle plumes: Thin, fat, successful, or failing? Constraints to explain hot spot volcanism through time and space |
title_sort |
mantle plumes: thin, fat, successful, or failing? constraints to explain hot spot volcanism through time and space |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713/document https://hal-insu.archives-ouvertes.fr/insu-03603713/file/Geophysical%20Research%20Letters%20-%202008%20-%20Kumagai%20-%20Mantle%20plumes%20Thin%20fat%20successful%20or%20failing%20Constraints%20to%20explain.pdf https://doi.org/10.1029/2008GL035079 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03603713 Geophysical Research Letters, 2008, 35, ⟨10.1029/2008GL035079⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL035079 insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713 https://hal-insu.archives-ouvertes.fr/insu-03603713/document https://hal-insu.archives-ouvertes.fr/insu-03603713/file/Geophysical%20Research%20Letters%20-%202008%20-%20Kumagai%20-%20Mantle%20plumes%20Thin%20fat%20successful%20or%20failing%20Constraints%20to%20explain.pdf BIBCODE: 2008GeoRL.3516301K doi:10.1029/2008GL035079 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008GL035079 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
16 |
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1769006921431384064 |