The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland
International audience Calcium isotopic compositions () were measured in Icelandic rivers draining a range of catchment types. The values of the rivers ranged from 0.45‰ to 0.67‰, which in all cases was higher than the value of basaltic rock standards (0.42±0.03‰). A single explanation was unable to...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://hal.univ-lorraine.fr/hal-01764530 https://doi.org/10.1016/j.epsl.2013.05.038 |
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ftunilorrainehal:oai:HAL:hal-01764530v1 2024-09-15T18:13:35+00:00 The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland Hindshaw, Ruth Bourdon, Bernard Pogge von Strandmann, Philip A.E. Vigier, Nathalie Burton, Kevin Institute of Geochemistry and Petrology ETH Zürich Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)-Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Oxford University of Oxford 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) Department of Earth Sciences Durham Durham University 2013-07 https://hal.univ-lorraine.fr/hal-01764530 https://doi.org/10.1016/j.epsl.2013.05.038 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2013.05.038 hal-01764530 https://hal.univ-lorraine.fr/hal-01764530 doi:10.1016/j.epsl.2013.05.038 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.univ-lorraine.fr/hal-01764530 Earth and Planetary Science Letters, 2013, 374, pp.173 - 184. ⟨10.1016/j.epsl.2013.05.038⟩ calcium calcium isotopes Iceland chemical weathering [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2013 ftunilorrainehal https://doi.org/10.1016/j.epsl.2013.05.038 2024-07-08T23:40:29Z International audience Calcium isotopic compositions () were measured in Icelandic rivers draining a range of catchment types. The values of the rivers ranged from 0.45‰ to 0.67‰, which in all cases was higher than the value of basaltic rock standards (0.42±0.03‰). A single explanation was unable to satisfactorily explain the values of all rivers, rather it was found that the rivers formed three distinct groups based on the extent of glacial coverage in each catchment. The Ca isotopic composition of rivers draining catchments with less than 10% glacial cover could be explained by the mixing of water sources: basalt-derived solutes, meltwater (taken to represent meteorological precipitation inputs) and hydrothermal water. However, fractionation of in these catchments cannot unequivocally be ruled out. In catchments with greater than 22% glacial cover, Ca isotopic compositions could not be explained by a mixture of water sources and instead reflected a fractionation process, most likely the precipitation of Ca-bearing secondary minerals or the adsorption/ion-exchange of Ca onto mineral surfaces. The fractionation factor () for this process was calculated to be 0.9999. The third group of rivers, with partially glaciated (10–21%) catchments, grouped with glaciated catchments with respect to their Sr geochemistry and with non-glaciated catchments with respect to their Ca geochemistry. The difference in the controls of Ca isotope fractionation between glaciated and unglaciated catchments was attributed to different weathering regimes. Article in Journal/Newspaper Iceland Université de Lorraine: HAL Earth and Planetary Science Letters 374 173 184 |
institution |
Open Polar |
collection |
Université de Lorraine: HAL |
op_collection_id |
ftunilorrainehal |
language |
English |
topic |
calcium calcium isotopes Iceland chemical weathering [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
calcium calcium isotopes Iceland chemical weathering [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Hindshaw, Ruth Bourdon, Bernard Pogge von Strandmann, Philip A.E. Vigier, Nathalie Burton, Kevin The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
topic_facet |
calcium calcium isotopes Iceland chemical weathering [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Calcium isotopic compositions () were measured in Icelandic rivers draining a range of catchment types. The values of the rivers ranged from 0.45‰ to 0.67‰, which in all cases was higher than the value of basaltic rock standards (0.42±0.03‰). A single explanation was unable to satisfactorily explain the values of all rivers, rather it was found that the rivers formed three distinct groups based on the extent of glacial coverage in each catchment. The Ca isotopic composition of rivers draining catchments with less than 10% glacial cover could be explained by the mixing of water sources: basalt-derived solutes, meltwater (taken to represent meteorological precipitation inputs) and hydrothermal water. However, fractionation of in these catchments cannot unequivocally be ruled out. In catchments with greater than 22% glacial cover, Ca isotopic compositions could not be explained by a mixture of water sources and instead reflected a fractionation process, most likely the precipitation of Ca-bearing secondary minerals or the adsorption/ion-exchange of Ca onto mineral surfaces. The fractionation factor () for this process was calculated to be 0.9999. The third group of rivers, with partially glaciated (10–21%) catchments, grouped with glaciated catchments with respect to their Sr geochemistry and with non-glaciated catchments with respect to their Ca geochemistry. The difference in the controls of Ca isotope fractionation between glaciated and unglaciated catchments was attributed to different weathering regimes. |
author2 |
Institute of Geochemistry and Petrology ETH Zürich Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)-Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Oxford University of Oxford 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) Department of Earth Sciences Durham Durham University |
format |
Article in Journal/Newspaper |
author |
Hindshaw, Ruth Bourdon, Bernard Pogge von Strandmann, Philip A.E. Vigier, Nathalie Burton, Kevin |
author_facet |
Hindshaw, Ruth Bourdon, Bernard Pogge von Strandmann, Philip A.E. Vigier, Nathalie Burton, Kevin |
author_sort |
Hindshaw, Ruth |
title |
The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
title_short |
The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
title_full |
The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
title_fullStr |
The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
title_full_unstemmed |
The stable calcium isotopic composition of rivers draining basaltic catchments in Iceland |
title_sort |
stable calcium isotopic composition of rivers draining basaltic catchments in iceland |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.univ-lorraine.fr/hal-01764530 https://doi.org/10.1016/j.epsl.2013.05.038 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.univ-lorraine.fr/hal-01764530 Earth and Planetary Science Letters, 2013, 374, pp.173 - 184. ⟨10.1016/j.epsl.2013.05.038⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2013.05.038 hal-01764530 https://hal.univ-lorraine.fr/hal-01764530 doi:10.1016/j.epsl.2013.05.038 |
op_doi |
https://doi.org/10.1016/j.epsl.2013.05.038 |
container_title |
Earth and Planetary Science Letters |
container_volume |
374 |
container_start_page |
173 |
op_container_end_page |
184 |
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1810451349100298240 |