Homoky, WB orcid.org/0000-0002-9562-8591, John, SG, Conway, TM et al. (1 more author) (2013) Distinct iron isotopic signatures and supply from marine sediment dissolution. Nature Communications, 4. 2143. ISSN 2041-1723
Abstract
Oceanic iron inputs must be traced and quantified to learn how they affect primary productivity and climate. Chemical reduction of iron in continental margin sediments provides a substantial dissolved flux to the oceans, which is isotopically lighter than the crust, and so may be distinguished in seawater from other sources, such as wind-blown dust. However, heavy iron isotopes measured in seawater have recently led to the proposition of another source of dissolved iron from ‘non-reductive’ dissolution of continental margins. Here we present the first pore water iron isotope data from a passive-tectonic and semi-arid ocean margin (South Africa), which reveals a smaller and isotopically heavier flux of dissolved iron to seawater than active-tectonic and dysoxic continental margins. These data provide in situ evidence of non-reductive iron dissolution from a continental margin, and further show that geological and hydro-climatic factors may affect the amount and isotopic composition of iron entering the ocean.
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Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Ⓒ 2013 Macmillan Publishers Limited. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. To view a copy of this licence visit http:// creativecommons.org/licenses/by/3.0/. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 May 2023 13:17 |
Last Modified: | 22 May 2023 13:17 |
Published Version: | http://dx.doi.org/10.1038/ncomms3143 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1038/ncomms3143 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:197139 |
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