The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir
In this paper, we re-investigate the isotopic composition of hydrogen in MORB and the possible effects of contamination on δD and water content. A suite of 40 N-MORB from the Pacific–Antarctic ridge, far from any hotspot, was analyzed for chlorine content by electron microprobe and for water content...
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ftcaltechauth:oai:authors.library.caltech.edu:43078 2023-05-15T14:04:55+02:00 The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir Clog, Matthieu Aubaud, Cyril Cartigny, Pierre Dosso, Laure 2013-11-01 application/pdf https://authors.library.caltech.edu/43078/ https://authors.library.caltech.edu/43078/7/mmc1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510 en eng Elsevier https://authors.library.caltech.edu/43078/7/mmc1.pdf Clog, Matthieu and Aubaud, Cyril and Cartigny, Pierre and Dosso, Laure (2013) The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir. Earth and Planetary Science Letters, 381 . pp. 156-165. ISSN 0012-821X. doi:10.1016/j.epsl.2013.08.043. https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510 <https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510> other Article PeerReviewed 2013 ftcaltechauth https://doi.org/10.1016/j.epsl.2013.08.043 2021-11-11T18:56:18Z In this paper, we re-investigate the isotopic composition of hydrogen in MORB and the possible effects of contamination on δD and water content. A suite of 40 N-MORB from the Pacific–Antarctic ridge, far from any hotspot, was analyzed for chlorine content by electron microprobe and for water content and δD with silica tubes. Cl concentrations (from 29 to 2400 ppm) indicate widespread contamination, more intense with faster spreading rates, while water contents (from 840 to 7800 ppm) are mainly controlled by igneous processes. δD values range from −76 to −48‰−48‰, with an average value of −61‰−61‰. The lack of correlation between Cl content and either H_2O/Ce or δD indicate that contamination has a negligible effect on δD for our samples, which is therefore characteristic of the mantle below the Pacific–Antarctic ridge. We suggest that the 20‰ lower δD value reported for the North Pacific and North Atlantic is highly unlikely from geodynamical arguments. We propose that the convecting mantle is characterized by a δD of −60±5‰−60±5‰, as supported by the most recent data from North Atlantic N-MORB. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Caltech Authors (California Institute of Technology) Antarctic Pacific Earth and Planetary Science Letters 381 156 165 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
In this paper, we re-investigate the isotopic composition of hydrogen in MORB and the possible effects of contamination on δD and water content. A suite of 40 N-MORB from the Pacific–Antarctic ridge, far from any hotspot, was analyzed for chlorine content by electron microprobe and for water content and δD with silica tubes. Cl concentrations (from 29 to 2400 ppm) indicate widespread contamination, more intense with faster spreading rates, while water contents (from 840 to 7800 ppm) are mainly controlled by igneous processes. δD values range from −76 to −48‰−48‰, with an average value of −61‰−61‰. The lack of correlation between Cl content and either H_2O/Ce or δD indicate that contamination has a negligible effect on δD for our samples, which is therefore characteristic of the mantle below the Pacific–Antarctic ridge. We suggest that the 20‰ lower δD value reported for the North Pacific and North Atlantic is highly unlikely from geodynamical arguments. We propose that the convecting mantle is characterized by a δD of −60±5‰−60±5‰, as supported by the most recent data from North Atlantic N-MORB. |
format |
Article in Journal/Newspaper |
author |
Clog, Matthieu Aubaud, Cyril Cartigny, Pierre Dosso, Laure |
spellingShingle |
Clog, Matthieu Aubaud, Cyril Cartigny, Pierre Dosso, Laure The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
author_facet |
Clog, Matthieu Aubaud, Cyril Cartigny, Pierre Dosso, Laure |
author_sort |
Clog, Matthieu |
title |
The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
title_short |
The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
title_full |
The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
title_fullStr |
The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
title_full_unstemmed |
The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir |
title_sort |
hydrogen isotopic composition and water content of southern pacific morb: a reassessment of the d/h ratio of the depleted mantle reservoir |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://authors.library.caltech.edu/43078/ https://authors.library.caltech.edu/43078/7/mmc1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_relation |
https://authors.library.caltech.edu/43078/7/mmc1.pdf Clog, Matthieu and Aubaud, Cyril and Cartigny, Pierre and Dosso, Laure (2013) The hydrogen isotopic composition and water content of southern Pacific MORB: A reassessment of the D/H ratio of the depleted mantle reservoir. Earth and Planetary Science Letters, 381 . pp. 156-165. ISSN 0012-821X. doi:10.1016/j.epsl.2013.08.043. https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510 <https://resolver.caltech.edu/CaltechAUTHORS:20131219-082308510> |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.epsl.2013.08.043 |
container_title |
Earth and Planetary Science Letters |
container_volume |
381 |
container_start_page |
156 |
op_container_end_page |
165 |
_version_ |
1766276370469486592 |