Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed
Interactions between organic and detrital mineral phases strongly influence both the dispersal and accumulation of terrestrial organic carbon (OC) in continental margin sediments. Yet the complex interplay among biological, chemical, and physical processes limits our understanding of how organo-mine...
Published in: | Geochimica et Cosmochimica Acta |
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ODU Digital Commons
2021
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/426 https://doi.org/10.1016/j.gca.2021.08.019 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1437/viewcontent/Harvey_2021_DetrialNeodymiumandRadiocarbonasComplementaryOCR.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1437 2023-06-11T04:08:52+02:00 Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed Schwab, Melissa S. Rickli, Jörg D. MacDonald, Robie W. Harvey, H. Rodger Haghipour, Negar Eglinton, Timothy I. 2021-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/426 https://doi.org/10.1016/j.gca.2021.08.019 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1437/viewcontent/Harvey_2021_DetrialNeodymiumandRadiocarbonasComplementaryOCR.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/426 doi:10.1016/j.gca.2021.08.019 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1437/viewcontent/Harvey_2021_DetrialNeodymiumandRadiocarbonasComplementaryOCR.pdf © 2021 The Authors. This is an open access article under the Attribution-NonCommercial-NoDerivatives4.0International (CC BY-NC-ND 4.0) Creative Commons License . OES Faculty Publications Western Arctic Ocean Organic carbon Carbon 14 Neodymium isotopes Strontium isotopes Detrital sediments Biochemistry Marine Biology Oceanography Sedimentology article 2021 ftolddominionuni https://doi.org/10.1016/j.gca.2021.08.019 2023-05-08T18:03:28Z Interactions between organic and detrital mineral phases strongly influence both the dispersal and accumulation of terrestrial organic carbon (OC) in continental margin sediments. Yet the complex interplay among biological, chemical, and physical processes limits our understanding of how organo-mineral interactions evolve during sediment transfer and burial. In particular, diverse OC sources and complex hydrodynamic processes hinder the assessment of how the partnership of organic matter and its mineral host evolves during supply and dispersal over continental margins. In this study, we integrate new and compiled sedimentological (grain size, surface area), organic (%OC, OC-δ13C, OC-F14C), and inorganic isotopic (εNd, 87Sr/86Sr) geochemical data for a broad suite of surface sediments spanning the Western Arctic Ocean from the Bering Sea to the Mackenzie River Delta that capture diverse sources and ages of both terrestrial and marine material deposited in contrasting shelf and slope settings. Spatial gradients in sediment properties were used to delineate regional sources and transport processes influencing the dispersion and persistence of OC-mineral particle associations during export and burial. We found strong relationships between physical parameters, aluminum content, and OC-14C suggesting that terrestrial OC remains tightly associated with its detrital mineral carrier during source-to-sink transport. Notably, carbon and neodymium isotopic data yield consistent information regarding organic matter provenance. Results obtained highlight the potential for coupled organic-inorganic tracer measurements to elucidate sediment sources and to constrain physical and geochemical processes during sediment mobilization and transport in the Western Arctic Ocean. Tandem measurements of carbon and Nd isotopes may provide a new way to identify large-scale biogeochemical and ecological changes in the sources, nature, and fate of OC stemming from predicted increases in sea ice loss and fluvial inputs of dissolved and ... Article in Journal/Newspaper Arctic Arctic Ocean Bering Sea Mackenzie river Sea ice Old Dominion University: ODU Digital Commons Arctic Arctic Ocean Bering Sea Mackenzie River Geochimica et Cosmochimica Acta 315 101 126 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Western Arctic Ocean Organic carbon Carbon 14 Neodymium isotopes Strontium isotopes Detrital sediments Biochemistry Marine Biology Oceanography Sedimentology |
spellingShingle |
Western Arctic Ocean Organic carbon Carbon 14 Neodymium isotopes Strontium isotopes Detrital sediments Biochemistry Marine Biology Oceanography Sedimentology Schwab, Melissa S. Rickli, Jörg D. MacDonald, Robie W. Harvey, H. Rodger Haghipour, Negar Eglinton, Timothy I. Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
topic_facet |
Western Arctic Ocean Organic carbon Carbon 14 Neodymium isotopes Strontium isotopes Detrital sediments Biochemistry Marine Biology Oceanography Sedimentology |
description |
Interactions between organic and detrital mineral phases strongly influence both the dispersal and accumulation of terrestrial organic carbon (OC) in continental margin sediments. Yet the complex interplay among biological, chemical, and physical processes limits our understanding of how organo-mineral interactions evolve during sediment transfer and burial. In particular, diverse OC sources and complex hydrodynamic processes hinder the assessment of how the partnership of organic matter and its mineral host evolves during supply and dispersal over continental margins. In this study, we integrate new and compiled sedimentological (grain size, surface area), organic (%OC, OC-δ13C, OC-F14C), and inorganic isotopic (εNd, 87Sr/86Sr) geochemical data for a broad suite of surface sediments spanning the Western Arctic Ocean from the Bering Sea to the Mackenzie River Delta that capture diverse sources and ages of both terrestrial and marine material deposited in contrasting shelf and slope settings. Spatial gradients in sediment properties were used to delineate regional sources and transport processes influencing the dispersion and persistence of OC-mineral particle associations during export and burial. We found strong relationships between physical parameters, aluminum content, and OC-14C suggesting that terrestrial OC remains tightly associated with its detrital mineral carrier during source-to-sink transport. Notably, carbon and neodymium isotopic data yield consistent information regarding organic matter provenance. Results obtained highlight the potential for coupled organic-inorganic tracer measurements to elucidate sediment sources and to constrain physical and geochemical processes during sediment mobilization and transport in the Western Arctic Ocean. Tandem measurements of carbon and Nd isotopes may provide a new way to identify large-scale biogeochemical and ecological changes in the sources, nature, and fate of OC stemming from predicted increases in sea ice loss and fluvial inputs of dissolved and ... |
format |
Article in Journal/Newspaper |
author |
Schwab, Melissa S. Rickli, Jörg D. MacDonald, Robie W. Harvey, H. Rodger Haghipour, Negar Eglinton, Timothy I. |
author_facet |
Schwab, Melissa S. Rickli, Jörg D. MacDonald, Robie W. Harvey, H. Rodger Haghipour, Negar Eglinton, Timothy I. |
author_sort |
Schwab, Melissa S. |
title |
Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
title_short |
Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
title_full |
Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
title_fullStr |
Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
title_full_unstemmed |
Detrital Neodymium and (Radio)Carbon as Complementary Sedimentary Bedfellows? The Western Arctic Ocean as a Testbed |
title_sort |
detrital neodymium and (radio)carbon as complementary sedimentary bedfellows? the western arctic ocean as a testbed |
publisher |
ODU Digital Commons |
publishDate |
2021 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/426 https://doi.org/10.1016/j.gca.2021.08.019 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1437/viewcontent/Harvey_2021_DetrialNeodymiumandRadiocarbonasComplementaryOCR.pdf |
geographic |
Arctic Arctic Ocean Bering Sea Mackenzie River |
geographic_facet |
Arctic Arctic Ocean Bering Sea Mackenzie River |
genre |
Arctic Arctic Ocean Bering Sea Mackenzie river Sea ice |
genre_facet |
Arctic Arctic Ocean Bering Sea Mackenzie river Sea ice |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/426 doi:10.1016/j.gca.2021.08.019 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1437/viewcontent/Harvey_2021_DetrialNeodymiumandRadiocarbonasComplementaryOCR.pdf |
op_rights |
© 2021 The Authors. This is an open access article under the Attribution-NonCommercial-NoDerivatives4.0International (CC BY-NC-ND 4.0) Creative Commons License . |
op_doi |
https://doi.org/10.1016/j.gca.2021.08.019 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
315 |
container_start_page |
101 |
op_container_end_page |
126 |
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1768382489839009792 |