A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts
International audience In order to assess whether material differentiated shortly after terrestrial accretion is still present in the deep mantle, we investigated hot spot basalts for 142Nd/144Nd anomalies that could attest for the presence of live 146Sm (T1/2 = 103 My) at the time the mantle source...
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Online Access: | https://hal.science/hal-00098369 https://hal.science/hal-00098369/document https://hal.science/hal-00098369/file/2004GL021873.pdf https://doi.org/10.1029/2004GL021873 |
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ftunivlyon:oai:HAL:hal-00098369v1 2023-06-11T04:13:08+02:00 A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts Boyet, Maud O. Garcia, Michael Pik, Raphaël Albarède, Francis Laboratoire de Sciences de la Terre (LST) École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) PNP 2005 https://hal.science/hal-00098369 https://hal.science/hal-00098369/document https://hal.science/hal-00098369/file/2004GL021873.pdf https://doi.org/10.1029/2004GL021873 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL021873 hal-00098369 https://hal.science/hal-00098369 https://hal.science/hal-00098369/document https://hal.science/hal-00098369/file/2004GL021873.pdf doi:10.1029/2004GL021873 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00098369 Geophysical Research Letters, 2005, 32, pp.L04306. ⟨10.1029/2004GL021873⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2005 ftunivlyon https://doi.org/10.1029/2004GL021873 2023-05-03T16:40:22Z International audience In order to assess whether material differentiated shortly after terrestrial accretion is still present in the deep mantle, we investigated hot spot basalts for 142Nd/144Nd anomalies that could attest for the presence of live 146Sm (T1/2 = 103 My) at the time the mantle source of these basalts formed. We analyzed high 3He/4He basalts from Loihi and Ethiopia and normal 3He/4He basalts from Iceland. Although the 143Nd/144Nd ratios of these basalts reflect a source with long-term LREE (light rare earth elements) depletion, no resolvable 142Nd anomalies were detected. Taking the analytical uncertainties (10–20 ppm) into account, however, the present results do not rule out the possibility that a large proportion of material fractionated very early in the Earth's history may still be hidden in the deep mantle Article in Journal/Newspaper Iceland Université de Lyon: HAL Geophysical Research Letters 32 4 n/a n/a |
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Université de Lyon: HAL |
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ftunivlyon |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Boyet, Maud O. Garcia, Michael Pik, Raphaël Albarède, Francis A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience In order to assess whether material differentiated shortly after terrestrial accretion is still present in the deep mantle, we investigated hot spot basalts for 142Nd/144Nd anomalies that could attest for the presence of live 146Sm (T1/2 = 103 My) at the time the mantle source of these basalts formed. We analyzed high 3He/4He basalts from Loihi and Ethiopia and normal 3He/4He basalts from Iceland. Although the 143Nd/144Nd ratios of these basalts reflect a source with long-term LREE (light rare earth elements) depletion, no resolvable 142Nd anomalies were detected. Taking the analytical uncertainties (10–20 ppm) into account, however, the present results do not rule out the possibility that a large proportion of material fractionated very early in the Earth's history may still be hidden in the deep mantle |
author2 |
Laboratoire de Sciences de la Terre (LST) École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) PNP |
format |
Article in Journal/Newspaper |
author |
Boyet, Maud O. Garcia, Michael Pik, Raphaël Albarède, Francis |
author_facet |
Boyet, Maud O. Garcia, Michael Pik, Raphaël Albarède, Francis |
author_sort |
Boyet, Maud |
title |
A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
title_short |
A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
title_full |
A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
title_fullStr |
A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
title_full_unstemmed |
A search for 142 Nd evidence of primordial mantle heterogeneities in plume basalts |
title_sort |
search for 142 nd evidence of primordial mantle heterogeneities in plume basalts |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00098369 https://hal.science/hal-00098369/document https://hal.science/hal-00098369/file/2004GL021873.pdf https://doi.org/10.1029/2004GL021873 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00098369 Geophysical Research Letters, 2005, 32, pp.L04306. ⟨10.1029/2004GL021873⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL021873 hal-00098369 https://hal.science/hal-00098369 https://hal.science/hal-00098369/document https://hal.science/hal-00098369/file/2004GL021873.pdf doi:10.1029/2004GL021873 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2004GL021873 |
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Geophysical Research Letters |
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32 |
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4 |
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1768389791705989120 |