Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1
There is increasing evidence indicating that syndepositional redistribution of sediment on the seafloor by bottom currents is common and can significantly affect sediment mass accumulation rates. Notwithstanding its common incidence, this process (generally referred to as sediment focusing) is often...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.737638 2023-05-15T18:16:01+02:00 Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 Francois, Roger Frank, Martin Rutgers van der Loeff, Michiel M Bacon, Michael P LATITUDE: -59.788330 * LONGITUDE: -42.683330 * DATE/TIME START: 1992-09-13T18:24:00 * DATE/TIME END: 1992-09-13T18:24:00 2004-05-03 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.737638 https://doi.org/10.1594/PANGAEA.737638 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.737638 https://doi.org/10.1594/PANGAEA.737638 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Francois, Roger; Frank, Martin; Rutgers van der Loeff, Michiel M; Bacon, Michael P (2004): 230Th-normalization: an essential tool for interpreting sedimentary fluxes during the late Quaternary. Paleoceanography, 19, PA1018, https://doi.org/10.1029/2003PA000939 ANT-X/5 AWI_MarGeoChem Gravity corer (Kiel type) Marine Geochemistry @ AWI Polarstern PS22/817 PS22 06AQANTX_5 PS2319-1 Scotia Sea SL Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.737638 https://doi.org/10.1029/2003PA000939 2023-01-20T07:31:45Z There is increasing evidence indicating that syndepositional redistribution of sediment on the seafloor by bottom currents is common and can significantly affect sediment mass accumulation rates. Notwithstanding its common incidence, this process (generally referred to as sediment focusing) is often difficult to recognize. If redistribution is near synchronous to deposition, the stratigraphy of the sediment is not disturbed and sediment focusing can easily be overlooked. Ignoring it, however, can lead to serious misinterpretations of sedimentary fluxes, particularly when past changes in export flux from the overlying water are inferred. In many instances, this problem can be resolved, at least for sediments deposited during the late Quaternary, by normalizing to the flux of 230Th scavenged from seawater, which is nearly constant and equivalent to the known rate of production of 230Th from the decay of dissolved 234U. We review the principle, advantages and limitations of this method. Notwithstanding its limitations, it is clear that 230Th normalization does provide a means of achieving more accurate interpretations of sedimentary fluxes and eliminates the risk of serious misinterpretations of sediment mass accumulation rates. Dataset Scotia Sea PANGAEA - Data Publisher for Earth & Environmental Science Scotia Sea ENVELOPE(-42.683330,-42.683330,-59.788330,-59.788330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-X/5 AWI_MarGeoChem Gravity corer (Kiel type) Marine Geochemistry @ AWI Polarstern PS22/817 PS22 06AQANTX_5 PS2319-1 Scotia Sea SL |
spellingShingle |
ANT-X/5 AWI_MarGeoChem Gravity corer (Kiel type) Marine Geochemistry @ AWI Polarstern PS22/817 PS22 06AQANTX_5 PS2319-1 Scotia Sea SL Francois, Roger Frank, Martin Rutgers van der Loeff, Michiel M Bacon, Michael P Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
topic_facet |
ANT-X/5 AWI_MarGeoChem Gravity corer (Kiel type) Marine Geochemistry @ AWI Polarstern PS22/817 PS22 06AQANTX_5 PS2319-1 Scotia Sea SL |
description |
There is increasing evidence indicating that syndepositional redistribution of sediment on the seafloor by bottom currents is common and can significantly affect sediment mass accumulation rates. Notwithstanding its common incidence, this process (generally referred to as sediment focusing) is often difficult to recognize. If redistribution is near synchronous to deposition, the stratigraphy of the sediment is not disturbed and sediment focusing can easily be overlooked. Ignoring it, however, can lead to serious misinterpretations of sedimentary fluxes, particularly when past changes in export flux from the overlying water are inferred. In many instances, this problem can be resolved, at least for sediments deposited during the late Quaternary, by normalizing to the flux of 230Th scavenged from seawater, which is nearly constant and equivalent to the known rate of production of 230Th from the decay of dissolved 234U. We review the principle, advantages and limitations of this method. Notwithstanding its limitations, it is clear that 230Th normalization does provide a means of achieving more accurate interpretations of sedimentary fluxes and eliminates the risk of serious misinterpretations of sediment mass accumulation rates. |
format |
Dataset |
author |
Francois, Roger Frank, Martin Rutgers van der Loeff, Michiel M Bacon, Michael P |
author_facet |
Francois, Roger Frank, Martin Rutgers van der Loeff, Michiel M Bacon, Michael P |
author_sort |
Francois, Roger |
title |
Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
title_short |
Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
title_full |
Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
title_fullStr |
Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
title_full_unstemmed |
Radionuclide analyses, and sedimentation and accumulation rates of sediment core PS2319-1 |
title_sort |
radionuclide analyses, and sedimentation and accumulation rates of sediment core ps2319-1 |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.737638 https://doi.org/10.1594/PANGAEA.737638 |
op_coverage |
LATITUDE: -59.788330 * LONGITUDE: -42.683330 * DATE/TIME START: 1992-09-13T18:24:00 * DATE/TIME END: 1992-09-13T18:24:00 |
long_lat |
ENVELOPE(-42.683330,-42.683330,-59.788330,-59.788330) |
geographic |
Scotia Sea |
geographic_facet |
Scotia Sea |
genre |
Scotia Sea |
genre_facet |
Scotia Sea |
op_source |
Supplement to: Francois, Roger; Frank, Martin; Rutgers van der Loeff, Michiel M; Bacon, Michael P (2004): 230Th-normalization: an essential tool for interpreting sedimentary fluxes during the late Quaternary. Paleoceanography, 19, PA1018, https://doi.org/10.1029/2003PA000939 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.737638 https://doi.org/10.1594/PANGAEA.737638 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.737638 https://doi.org/10.1029/2003PA000939 |
_version_ |
1766189421821952000 |