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...
Published in: | Earth and Planetary Science Letters |
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ftuglasgow:oai:eprints.gla.ac.uk:135524 2023-05-15T14:04:48+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 http://eprints.gla.ac.uk/135524/ unknown Elsevier Clog, M. <http://eprints.gla.ac.uk/view/author/34219.html> , Aubaud, C., Cartigny, P. and Dosso, L. (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 <http://eprints.gla.ac.uk/view/journal_volume/Earth_and_Planetary_Science_Letters.html>, 381, pp. 156-165. (doi:10.1016/j.epsl.2013.08.043 <http://dx.doi.org/10.1016/j.epsl.2013.08.043>) Articles PeerReviewed 2013 ftuglasgow https://doi.org/10.1016/j.epsl.2013.08.043 2020-01-10T01:18:37Z 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. δ D values range from −76 to −48‰, with an average value of −61‰. The lack of correlation between Cl content and either H2O/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 δ D of −60±5‰, as supported by the most recent data from North Atlantic N-MORB. Article in Journal/Newspaper Antarc* Antarctic North Atlantic University of Glasgow: Enlighten - Publications Antarctic Pacific Earth and Planetary Science Letters 381 156 165 |
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University of Glasgow: Enlighten - Publications |
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ftuglasgow |
language |
unknown |
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. δ D values range from −76 to −48‰, with an average value of −61‰. The lack of correlation between Cl content and either H2O/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 δ D of −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 |
http://eprints.gla.ac.uk/135524/ |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_relation |
Clog, M. <http://eprints.gla.ac.uk/view/author/34219.html> , Aubaud, C., Cartigny, P. and Dosso, L. (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 <http://eprints.gla.ac.uk/view/journal_volume/Earth_and_Planetary_Science_Letters.html>, 381, pp. 156-165. (doi:10.1016/j.epsl.2013.08.043 <http://dx.doi.org/10.1016/j.epsl.2013.08.043>) |
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_ |
1766276136434663424 |