Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system?
International audience We present rare gas data in fresh glasses from the Lucky Strike segment located on the Mid Atlantic Ridge (∼37.3°N), close to the Azores plateau. We analyzed the helium and neon isotopes in 28 samples by melting as well as He‐Ne‐Ar‐Kr‐Xe isotopes in 9 samples by crushing. Samp...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261/document https://hal.archives-ouvertes.fr/hal-02330261/file/Moreira2011.pdf https://doi.org/10.1029/2011GL046794 |
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ftccsdartic:oai:HAL:hal-02330261v1 2023-05-15T17:33:29+02:00 Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? Moreira, Manuel Escartin, Javier Gayer, Eric Hamelin, Cédric Bezos, Antoine Guillon, Fabien Cannat, Mathilde Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2011 https://hal.archives-ouvertes.fr/hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261/document https://hal.archives-ouvertes.fr/hal-02330261/file/Moreira2011.pdf https://doi.org/10.1029/2011GL046794 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GL046794 hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261/document https://hal.archives-ouvertes.fr/hal-02330261/file/Moreira2011.pdf doi:10.1029/2011GL046794 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-02330261 Geophysical Research Letters, American Geophysical Union, 2011, 38 (8), pp.L08304. ⟨10.1029/2011GL046794⟩ [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2011 ftccsdartic https://doi.org/10.1029/2011GL046794 2021-10-31T01:17:42Z International audience We present rare gas data in fresh glasses from the Lucky Strike segment located on the Mid Atlantic Ridge (∼37.3°N), close to the Azores plateau. We analyzed the helium and neon isotopes in 28 samples by melting as well as He‐Ne‐Ar‐Kr‐Xe isotopes in 9 samples by crushing. Samples were collected during the Graviluck06, MOMAR08, and Bathyluck09 cruises over a ridge length of ∼13 km (mean sample spacing of ∼500 m), and at depths ranging from 1550 m to 2174 m. The helium isotopic ratio varies between 84,410 and 88,235 (R/Ra between 8.19 and 8.56). The samples having the “most” primitive helium isotopic ratio are the enriched samples (e.g. high K2O/TiO2) although the difference to the depleted samples is small. It appears that all of our samples derive from the same and well‐homogenized magma chamber. Neon isotopes clearly show the influence of the Azores hotspot, which is not seen with helium because of lower 3He/22Ne in the plume source compared to the MORB source. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Mid-Atlantic Ridge Geophysical Research Letters 38 8 n/a n/a |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Moreira, Manuel Escartin, Javier Gayer, Eric Hamelin, Cédric Bezos, Antoine Guillon, Fabien Cannat, Mathilde Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
topic_facet |
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience We present rare gas data in fresh glasses from the Lucky Strike segment located on the Mid Atlantic Ridge (∼37.3°N), close to the Azores plateau. We analyzed the helium and neon isotopes in 28 samples by melting as well as He‐Ne‐Ar‐Kr‐Xe isotopes in 9 samples by crushing. Samples were collected during the Graviluck06, MOMAR08, and Bathyluck09 cruises over a ridge length of ∼13 km (mean sample spacing of ∼500 m), and at depths ranging from 1550 m to 2174 m. The helium isotopic ratio varies between 84,410 and 88,235 (R/Ra between 8.19 and 8.56). The samples having the “most” primitive helium isotopic ratio are the enriched samples (e.g. high K2O/TiO2) although the difference to the depleted samples is small. It appears that all of our samples derive from the same and well‐homogenized magma chamber. Neon isotopes clearly show the influence of the Azores hotspot, which is not seen with helium because of lower 3He/22Ne in the plume source compared to the MORB source. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Moreira, Manuel Escartin, Javier Gayer, Eric Hamelin, Cédric Bezos, Antoine Guillon, Fabien Cannat, Mathilde |
author_facet |
Moreira, Manuel Escartin, Javier Gayer, Eric Hamelin, Cédric Bezos, Antoine Guillon, Fabien Cannat, Mathilde |
author_sort |
Moreira, Manuel |
title |
Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
title_short |
Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
title_full |
Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
title_fullStr |
Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
title_full_unstemmed |
Rare gas systematics on Lucky Strike basalts (37°N, North Atlantic): Evidence for efficient homogenization in a long-lived magma chamber system? |
title_sort |
rare gas systematics on lucky strike basalts (37°n, north atlantic): evidence for efficient homogenization in a long-lived magma chamber system? |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261/document https://hal.archives-ouvertes.fr/hal-02330261/file/Moreira2011.pdf https://doi.org/10.1029/2011GL046794 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-02330261 Geophysical Research Letters, American Geophysical Union, 2011, 38 (8), pp.L08304. ⟨10.1029/2011GL046794⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GL046794 hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261 https://hal.archives-ouvertes.fr/hal-02330261/document https://hal.archives-ouvertes.fr/hal-02330261/file/Moreira2011.pdf doi:10.1029/2011GL046794 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2011GL046794 |
container_title |
Geophysical Research Letters |
container_volume |
38 |
container_issue |
8 |
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n/a |
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n/a |
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1766132007130103808 |