The use of foraminifera as a record of the past neodymium isotope composition of seawater
We present new isotopic data for sedimentary planktonic foraminifera, as well as for potential water column and sedimentary sources of neodymium (Nd), which confirm that the isotopic composition of the foraminifera is the same as surface seawater and very different from deep water and sedimentary Nd...
Published in: | Paleoceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2016
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Online Access: | https://doi.org/10.1029/2003PA000957 https://ora.ox.ac.uk/objects/uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 |
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ftuloxford:oai:ora.ox.ac.uk:uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 2024-10-06T13:52:15+00:00 The use of foraminifera as a record of the past neodymium isotope composition of seawater Vance, D Scrivner, A Beney, P Staubwasser, M Henderson, G Slowey, N 2016-07-28 https://doi.org/10.1029/2003PA000957 https://ora.ox.ac.uk/objects/uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 eng eng doi:10.1029/2003PA000957 https://ora.ox.ac.uk/objects/uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 https://doi.org/10.1029/2003PA000957 info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.1029/2003PA000957 2024-09-06T07:47:29Z We present new isotopic data for sedimentary planktonic foraminifera, as well as for potential water column and sedimentary sources of neodymium (Nd), which confirm that the isotopic composition of the foraminifera is the same as surface seawater and very different from deep water and sedimentary Nd. The faithfulness with which sedimentary foraminifera record the isotopic signature of surface seawater Nd is difficult to explain given their variable and high Nd/Ca ratios, ratios that are often sedimentary foraminifera, ratios that are often much higher than is plausible for direct incorporation within the calcite structure. We present further data that demonstrate a similarly large range in Nd/Ca ratios in plankton tow foraminifera, a range that may be controlled by redox conditions in the water column. Cleaning experiments reveal, in common with earlier work, that large amounts of Nd are released by cleaning with both hydrazine and diethylene triamine penta-acetic acid, but that the Nd released at each step is of surface origin. While further detailed studies are required to verify the exact location of the surface isotopic signature and the key controls on foraminiferal Nd isotope systematics, these new data place the use of planktonic foraminifera as recorders of surface water Nd isotope ratios, and thus of variations in the past supply of Nd to the oceans from the continents via weathering and erosion, on a reasonably sure footing. Copyright 2004 by the American Geophysical Union. Article in Journal/Newspaper Planktonic foraminifera ORA - Oxford University Research Archive Paleoceanography 19 2 n/a n/a |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
We present new isotopic data for sedimentary planktonic foraminifera, as well as for potential water column and sedimentary sources of neodymium (Nd), which confirm that the isotopic composition of the foraminifera is the same as surface seawater and very different from deep water and sedimentary Nd. The faithfulness with which sedimentary foraminifera record the isotopic signature of surface seawater Nd is difficult to explain given their variable and high Nd/Ca ratios, ratios that are often sedimentary foraminifera, ratios that are often much higher than is plausible for direct incorporation within the calcite structure. We present further data that demonstrate a similarly large range in Nd/Ca ratios in plankton tow foraminifera, a range that may be controlled by redox conditions in the water column. Cleaning experiments reveal, in common with earlier work, that large amounts of Nd are released by cleaning with both hydrazine and diethylene triamine penta-acetic acid, but that the Nd released at each step is of surface origin. While further detailed studies are required to verify the exact location of the surface isotopic signature and the key controls on foraminiferal Nd isotope systematics, these new data place the use of planktonic foraminifera as recorders of surface water Nd isotope ratios, and thus of variations in the past supply of Nd to the oceans from the continents via weathering and erosion, on a reasonably sure footing. Copyright 2004 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Vance, D Scrivner, A Beney, P Staubwasser, M Henderson, G Slowey, N |
spellingShingle |
Vance, D Scrivner, A Beney, P Staubwasser, M Henderson, G Slowey, N The use of foraminifera as a record of the past neodymium isotope composition of seawater |
author_facet |
Vance, D Scrivner, A Beney, P Staubwasser, M Henderson, G Slowey, N |
author_sort |
Vance, D |
title |
The use of foraminifera as a record of the past neodymium isotope composition of seawater |
title_short |
The use of foraminifera as a record of the past neodymium isotope composition of seawater |
title_full |
The use of foraminifera as a record of the past neodymium isotope composition of seawater |
title_fullStr |
The use of foraminifera as a record of the past neodymium isotope composition of seawater |
title_full_unstemmed |
The use of foraminifera as a record of the past neodymium isotope composition of seawater |
title_sort |
use of foraminifera as a record of the past neodymium isotope composition of seawater |
publishDate |
2016 |
url |
https://doi.org/10.1029/2003PA000957 https://ora.ox.ac.uk/objects/uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
doi:10.1029/2003PA000957 https://ora.ox.ac.uk/objects/uuid:1ef6f4eb-e06e-402c-989b-da030ce1a898 https://doi.org/10.1029/2003PA000957 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1029/2003PA000957 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1812180600568676352 |