The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland
International audience This study presents lithium isotope and elemental data for the dissolved phase and suspended and bedload sediments of the major Icelandic rivers. For the dissolved phase, δ7Li values range between 10.1‰ and 23.8‰, while river sediments display lower and much more homogeneous v...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://hal-brgm.archives-ouvertes.fr/hal-00516910 https://doi.org/10.1016/j.epsl.2009.08.026 |
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ftccsdartic:oai:HAL:hal-00516910v1 2023-05-15T16:51:16+02:00 The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland Vigier, Nicolas Gislason, Sigurdur R. Burton, K. W. Millot, Romain Mokadem, F. Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) University of Iceland Reykjavik Centre for Earth, Planetary, Space and Astronomical Research Milton Keynes (CEPSAR) The Open University Milton Keynes (OU) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) 2009 https://hal-brgm.archives-ouvertes.fr/hal-00516910 https://doi.org/10.1016/j.epsl.2009.08.026 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.08.026 hal-00516910 https://hal-brgm.archives-ouvertes.fr/hal-00516910 doi:10.1016/j.epsl.2009.08.026 ISSN: 0012-821X Earth and Planetary Science Letters https://hal-brgm.archives-ouvertes.fr/hal-00516910 Earth and Planetary Science Letters, Elsevier, 2009, 287 (3-4), p. 434-441. ⟨10.1016/j.epsl.2009.08.026⟩ Li isotopes basalt silicate weathering erosion rivers [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2009 ftccsdartic https://doi.org/10.1016/j.epsl.2009.08.026 2021-10-24T18:34:38Z International audience This study presents lithium isotope and elemental data for the dissolved phase and suspended and bedload sediments of the major Icelandic rivers. For the dissolved phase, δ7Li values range between 10.1‰ and 23.8‰, while river sediments display lower and much more homogeneous values (δ7Li = 3.1‰–4.8‰), close to the composition of unweathered Mid-Ocean Ridge Basalt (MORB). High δ7Li values are associated with high K/Li, Na/Li and Mg/Li ratios, in waters draining mainly old and weathered basalt catchments, whereas low δ7Li rivers are located in younger parts of the island. Simple mixing between precipitation, Li-rich hydrothermal springs and basalt weathering is unable to explain the entire range of δ7Li values. Instead, a simple model of Li uptake by secondary minerals, associated with clay–water Li isotope fractionation (Δ7Li ranging from − 1‰ to - 7.5‰) can explain both water and sediment δ7Li values. A negative correlation is observed between basalt chemical erosion rates and δ7Li measured in Icelandic rivers, and an empirical law is inferred. Comparison with literature data suggests that this relationship may be applicable at a more global scale, and, if confirmed, could be of particular use for estimating the evolution of continental weathering preserved in marine sedimentary records. However, more data are now needed for rivers draining silicates typical of the continental crust, in order to refine large scale modelling. Article in Journal/Newspaper Iceland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Earth and Planetary Science Letters 287 3-4 434 441 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Li isotopes basalt silicate weathering erosion rivers [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Li isotopes basalt silicate weathering erosion rivers [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Vigier, Nicolas Gislason, Sigurdur R. Burton, K. W. Millot, Romain Mokadem, F. The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
topic_facet |
Li isotopes basalt silicate weathering erosion rivers [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience This study presents lithium isotope and elemental data for the dissolved phase and suspended and bedload sediments of the major Icelandic rivers. For the dissolved phase, δ7Li values range between 10.1‰ and 23.8‰, while river sediments display lower and much more homogeneous values (δ7Li = 3.1‰–4.8‰), close to the composition of unweathered Mid-Ocean Ridge Basalt (MORB). High δ7Li values are associated with high K/Li, Na/Li and Mg/Li ratios, in waters draining mainly old and weathered basalt catchments, whereas low δ7Li rivers are located in younger parts of the island. Simple mixing between precipitation, Li-rich hydrothermal springs and basalt weathering is unable to explain the entire range of δ7Li values. Instead, a simple model of Li uptake by secondary minerals, associated with clay–water Li isotope fractionation (Δ7Li ranging from − 1‰ to - 7.5‰) can explain both water and sediment δ7Li values. A negative correlation is observed between basalt chemical erosion rates and δ7Li measured in Icelandic rivers, and an empirical law is inferred. Comparison with literature data suggests that this relationship may be applicable at a more global scale, and, if confirmed, could be of particular use for estimating the evolution of continental weathering preserved in marine sedimentary records. However, more data are now needed for rivers draining silicates typical of the continental crust, in order to refine large scale modelling. |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) University of Iceland Reykjavik Centre for Earth, Planetary, Space and Astronomical Research Milton Keynes (CEPSAR) The Open University Milton Keynes (OU) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) |
format |
Article in Journal/Newspaper |
author |
Vigier, Nicolas Gislason, Sigurdur R. Burton, K. W. Millot, Romain Mokadem, F. |
author_facet |
Vigier, Nicolas Gislason, Sigurdur R. Burton, K. W. Millot, Romain Mokadem, F. |
author_sort |
Vigier, Nicolas |
title |
The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
title_short |
The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
title_full |
The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
title_fullStr |
The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
title_full_unstemmed |
The relationship between riverine lithium isotope composition and silicate weathering rates in Iceland |
title_sort |
relationship between riverine lithium isotope composition and silicate weathering rates in iceland |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal-brgm.archives-ouvertes.fr/hal-00516910 https://doi.org/10.1016/j.epsl.2009.08.026 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal-brgm.archives-ouvertes.fr/hal-00516910 Earth and Planetary Science Letters, Elsevier, 2009, 287 (3-4), p. 434-441. ⟨10.1016/j.epsl.2009.08.026⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.08.026 hal-00516910 https://hal-brgm.archives-ouvertes.fr/hal-00516910 doi:10.1016/j.epsl.2009.08.026 |
op_doi |
https://doi.org/10.1016/j.epsl.2009.08.026 |
container_title |
Earth and Planetary Science Letters |
container_volume |
287 |
container_issue |
3-4 |
container_start_page |
434 |
op_container_end_page |
441 |
_version_ |
1766041381390778368 |