Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes
International audience Earth is a thermal engine that dissipates its internal heat primarily through convec-tion. The buoyant rise of hot material transports heat to the surface from the deep interior while colder material sinks at subduction zones. Mid-ocean ridges and hot-spots are major expressio...
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236/document https://hal-insu.archives-ouvertes.fr/insu-01309236/file/oceanography-2007-20-102-dyment.pdf https://doi.org/10.5670/oceanog.2007.84 |
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ftsorbonneuniv:oai:HAL:insu-01309236v1 2023-06-11T04:13:15+02:00 Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes Dyment, Jérome Lin, Jiang Baker, Edward 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) Department of Medical Biochemistry and Microbiology Uppsala University NOAA Pacific Marine Environmental Laboratory Seattle (PMEL) National Oceanic and Atmospheric Administration (NOAA) 2007 https://hal-insu.archives-ouvertes.fr/insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236/document https://hal-insu.archives-ouvertes.fr/insu-01309236/file/oceanography-2007-20-102-dyment.pdf https://doi.org/10.5670/oceanog.2007.84 en eng HAL CCSD Oceanography Society info:eu-repo/semantics/altIdentifier/doi/10.5670/oceanog.2007.84 insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236/document https://hal-insu.archives-ouvertes.fr/insu-01309236/file/oceanography-2007-20-102-dyment.pdf doi:10.5670/oceanog.2007.84 info:eu-repo/semantics/OpenAccess ISSN: 1042-8275 EISSN: 2377-617X Oceanography https://hal-insu.archives-ouvertes.fr/insu-01309236 Oceanography, 2007, 20 (1), pp.102-115. ⟨10.5670/oceanog.2007.84⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2007 ftsorbonneuniv https://doi.org/10.5670/oceanog.2007.84 2023-05-30T00:09:48Z International audience Earth is a thermal engine that dissipates its internal heat primarily through convec-tion. The buoyant rise of hot material transports heat to the surface from the deep interior while colder material sinks at subduction zones. Mid-ocean ridges and hot-spots are major expressions of heat dissipation at Earth's surface, as evidenced by their abundant volcanic activity. Ridges and hotspots, however, could differ significantly in their origins. Ridges are linear features that wind more than 60,000 km around the globe, constituting the major diverging boundaries of Earth's tectonic plates. Hot-spots, on the other hand, are localized regions of abnormally robust magmatism and distinctive geochemical anomalies (Figure 1). The causes of hotspots and their depths of origin are the focus of an intense debate in the scientific community. The " plume " model hypothesizes rising of buoyant mantle plumes as the primary cause of prominent hotspots such as Iceland and Hawaii (Morgan, 1971). In contrast, the " anti-plume " school argues that many of the observed " hotspot " volcanic and geochemical anomalies are simply due to melts leaking through tensional cracks in Earth's lithospheric plates—in other words, hotspots reflect only where the lithospheric plate is cracked, allowing melts to pass through, and not where the underlying mantle is hotter (see www.mantleplumes.org). A hybrid notion is that only a relatively small number of hotspots, especially those of enormous magmatic volumes, have their origin in buoyant thermal plumes rising from the deep mantle (e.g., Courtillot et al., 2003). Regardless of its specific depth of origin, however, when a hotspot is located close enough to a mid-ocean ridge, the two volcanic systems will interact, resulting in unique volcanic, geochemical, and hydrothermal features. In this paper, we discuss major features of hotspot-ridge interactions. Article in Journal/Newspaper Iceland HAL Sorbonne Université Oceanography 20 1 102 115 |
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Open Polar |
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HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Dyment, Jérome Lin, Jiang Baker, Edward Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Earth is a thermal engine that dissipates its internal heat primarily through convec-tion. The buoyant rise of hot material transports heat to the surface from the deep interior while colder material sinks at subduction zones. Mid-ocean ridges and hot-spots are major expressions of heat dissipation at Earth's surface, as evidenced by their abundant volcanic activity. Ridges and hotspots, however, could differ significantly in their origins. Ridges are linear features that wind more than 60,000 km around the globe, constituting the major diverging boundaries of Earth's tectonic plates. Hot-spots, on the other hand, are localized regions of abnormally robust magmatism and distinctive geochemical anomalies (Figure 1). The causes of hotspots and their depths of origin are the focus of an intense debate in the scientific community. The " plume " model hypothesizes rising of buoyant mantle plumes as the primary cause of prominent hotspots such as Iceland and Hawaii (Morgan, 1971). In contrast, the " anti-plume " school argues that many of the observed " hotspot " volcanic and geochemical anomalies are simply due to melts leaking through tensional cracks in Earth's lithospheric plates—in other words, hotspots reflect only where the lithospheric plate is cracked, allowing melts to pass through, and not where the underlying mantle is hotter (see www.mantleplumes.org). A hybrid notion is that only a relatively small number of hotspots, especially those of enormous magmatic volumes, have their origin in buoyant thermal plumes rising from the deep mantle (e.g., Courtillot et al., 2003). Regardless of its specific depth of origin, however, when a hotspot is located close enough to a mid-ocean ridge, the two volcanic systems will interact, resulting in unique volcanic, geochemical, and hydrothermal features. In this paper, we discuss major features of hotspot-ridge interactions. |
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) Department of Medical Biochemistry and Microbiology Uppsala University NOAA Pacific Marine Environmental Laboratory Seattle (PMEL) National Oceanic and Atmospheric Administration (NOAA) |
format |
Article in Journal/Newspaper |
author |
Dyment, Jérome Lin, Jiang Baker, Edward |
author_facet |
Dyment, Jérome Lin, Jiang Baker, Edward |
author_sort |
Dyment, Jérome |
title |
Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
title_short |
Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
title_full |
Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
title_fullStr |
Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
title_full_unstemmed |
Ridge-hotspot interactions What Mid-Ocean Ridges Tell Us About Deep Earth Processes |
title_sort |
ridge-hotspot interactions what mid-ocean ridges tell us about deep earth processes |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236/document https://hal-insu.archives-ouvertes.fr/insu-01309236/file/oceanography-2007-20-102-dyment.pdf https://doi.org/10.5670/oceanog.2007.84 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 1042-8275 EISSN: 2377-617X Oceanography https://hal-insu.archives-ouvertes.fr/insu-01309236 Oceanography, 2007, 20 (1), pp.102-115. ⟨10.5670/oceanog.2007.84⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5670/oceanog.2007.84 insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236 https://hal-insu.archives-ouvertes.fr/insu-01309236/document https://hal-insu.archives-ouvertes.fr/insu-01309236/file/oceanography-2007-20-102-dyment.pdf doi:10.5670/oceanog.2007.84 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5670/oceanog.2007.84 |
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Oceanography |
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20 |
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1 |
container_start_page |
102 |
op_container_end_page |
115 |
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