The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N
The Rainbow hydrothermal vent site, which is the largest known point source for dissolved Fe delivered to the deep North Atlantic ocean, has remained invariant in its Fe isotope composition over at least the past 16,000 years, based on analysis of metalliferous sediments beneath the plume. Because o...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2004
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/111073/ https://doi.org/10.1016/j.epsl.2004.06.001 |
id |
ftnerc:oai:nora.nerc.ac.uk:111073 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:111073 2023-05-15T17:30:36+02:00 The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N Severmann, S. Johnson, C.M. Beard, B.L. German, C.R. Edmonds, H.N. Chiba, H. Green, D.R.H. 2004 http://nora.nerc.ac.uk/id/eprint/111073/ https://doi.org/10.1016/j.epsl.2004.06.001 unknown Severmann, S.; Johnson, C.M.; Beard, B.L.; German, C.R.; Edmonds, H.N.; Chiba, H.; Green, D.R.H. 2004 The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N. Earth and Planetary Science Letters, 225 (1-2). 63-76. https://doi.org/10.1016/j.epsl.2004.06.001 <https://doi.org/10.1016/j.epsl.2004.06.001> Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1016/j.epsl.2004.06.001 2023-02-04T19:33:57Z The Rainbow hydrothermal vent site, which is the largest known point source for dissolved Fe delivered to the deep North Atlantic ocean, has remained invariant in its Fe isotope composition over at least the past 16,000 years, based on analysis of metalliferous sediments beneath the plume. Because of the conservative behavior of Fe in the Rainbow plume, 56Fe values of particles in the neutrally buoyant plume (−0.18±0.05‰) and underlying sediments (−0.19±0.05‰) are indistinguishable from the 56Fe values of the high-temperature fluid sources (−0.23±0.04‰). Particles from the near-vent, buoyant stage of the plume, however, have higher 56Fe values (+0.15‰ to +1.20‰) relative to the original vent fluid, consistent with fractionation during oxidation of Fe(II)aq to Fe(III)aq. Isotope compositions become invariant in the plume once all Fe(II)aq is fully oxidized, preserving the original composition of the vent fluid. The constant Fe isotope compositions of the vent fluids over time implies that changes in seawater Fe isotope composition of the North Atlantic ocean, as they are recorded in Fe–Mn crusts, requires changes in the relative fluxes of Fe to the ocean. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Mid-Atlantic Ridge Earth and Planetary Science Letters 225 1-2 63 76 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The Rainbow hydrothermal vent site, which is the largest known point source for dissolved Fe delivered to the deep North Atlantic ocean, has remained invariant in its Fe isotope composition over at least the past 16,000 years, based on analysis of metalliferous sediments beneath the plume. Because of the conservative behavior of Fe in the Rainbow plume, 56Fe values of particles in the neutrally buoyant plume (−0.18±0.05‰) and underlying sediments (−0.19±0.05‰) are indistinguishable from the 56Fe values of the high-temperature fluid sources (−0.23±0.04‰). Particles from the near-vent, buoyant stage of the plume, however, have higher 56Fe values (+0.15‰ to +1.20‰) relative to the original vent fluid, consistent with fractionation during oxidation of Fe(II)aq to Fe(III)aq. Isotope compositions become invariant in the plume once all Fe(II)aq is fully oxidized, preserving the original composition of the vent fluid. The constant Fe isotope compositions of the vent fluids over time implies that changes in seawater Fe isotope composition of the North Atlantic ocean, as they are recorded in Fe–Mn crusts, requires changes in the relative fluxes of Fe to the ocean. |
format |
Article in Journal/Newspaper |
author |
Severmann, S. Johnson, C.M. Beard, B.L. German, C.R. Edmonds, H.N. Chiba, H. Green, D.R.H. |
spellingShingle |
Severmann, S. Johnson, C.M. Beard, B.L. German, C.R. Edmonds, H.N. Chiba, H. Green, D.R.H. The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
author_facet |
Severmann, S. Johnson, C.M. Beard, B.L. German, C.R. Edmonds, H.N. Chiba, H. Green, D.R.H. |
author_sort |
Severmann, S. |
title |
The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
title_short |
The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
title_full |
The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
title_fullStr |
The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
title_full_unstemmed |
The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N |
title_sort |
effect of plume processes on the fe-isotope composition of hydrothermally derived fe in the deep ocean as inferred from the rainbow vent site, mid-atlantic ridge, 36,14'n |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/111073/ https://doi.org/10.1016/j.epsl.2004.06.001 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Severmann, S.; Johnson, C.M.; Beard, B.L.; German, C.R.; Edmonds, H.N.; Chiba, H.; Green, D.R.H. 2004 The effect of plume processes on the Fe-isotope composition of hydrothermally derived Fe in the deep ocean as inferred from the Rainbow vent site, Mid-Atlantic Ridge, 36,14'N. Earth and Planetary Science Letters, 225 (1-2). 63-76. https://doi.org/10.1016/j.epsl.2004.06.001 <https://doi.org/10.1016/j.epsl.2004.06.001> |
op_doi |
https://doi.org/10.1016/j.epsl.2004.06.001 |
container_title |
Earth and Planetary Science Letters |
container_volume |
225 |
container_issue |
1-2 |
container_start_page |
63 |
op_container_end_page |
76 |
_version_ |
1766127445188018176 |