Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada
Variations in chalcophile and redox-sensitive trace elements are examined at high-resolution intervals from a similar to 50 kyr long sediment core (MD02-2496) from the Vancouver Island margin. Enrichments of Ag, Cd, Re, U, and Mo above lithogenous levels, signifying sedimentary suboxia and anoxia, o...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2014
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00290/40117/39132.pdf https://archimer.ifremer.fr/doc/00290/40117/39133.doc https://archimer.ifremer.fr/doc/00290/40117/39134.xls https://doi.org/10.1002/2013PA002581 https://archimer.ifremer.fr/doc/00290/40117/ |
id |
ftarchimer:oai:archimer.ifremer.fr:40117 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:40117 2023-05-15T16:30:02+02:00 Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada Chang, Alice S. Pedersen, Thomas F. Hendy, Ingrid L. 2014-07-15 application/pdf https://archimer.ifremer.fr/doc/00290/40117/39132.pdf https://archimer.ifremer.fr/doc/00290/40117/39133.doc https://archimer.ifremer.fr/doc/00290/40117/39134.xls https://doi.org/10.1002/2013PA002581 https://archimer.ifremer.fr/doc/00290/40117/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00290/40117/39132.pdf https://archimer.ifremer.fr/doc/00290/40117/39133.doc https://archimer.ifremer.fr/doc/00290/40117/39134.xls doi:10.1002/2013PA002581 https://archimer.ifremer.fr/doc/00290/40117/ 2014. American Geophysical Union. All Rights Reserved info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2014-07-15 , Vol. 29 , N. 7 , P. 730-746 text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1002/2013PA002581 2021-09-23T20:26:50Z Variations in chalcophile and redox-sensitive trace elements are examined at high-resolution intervals from a similar to 50 kyr long sediment core (MD02-2496) from the Vancouver Island margin. Enrichments of Ag, Cd, Re, U, and Mo above lithogenous levels, signifying sedimentary suboxia and anoxia, occurred during the early Holocene and Bolling/Allerod, and during warm interstadial events of Marine Isotope Stage (MIS) 3. Down-core trace element profiles co-vary with productivity proxy records (opal, CaCO3, and marine organic carbon), and with sedimentary nitrogen isotope ratios, which reflect variably enriched nitrate upwelled from intermediate waters that were transported northward from the Eastern Tropical North Pacific. The similarity of the MD02-2496 record with records from the southern portion of the California Current System (CCS), and to the Greenland ice core oxygen isotope record during warm climate intervals, suggests that sedimentary redox conditions along the California Current responded to local productivity, to North Atlantic climate change and to tropical Pacific surface water processes via long-distance teleconnections. Concentrations of trace elements and productivity proxies were relatively depleted during the Younger Dryas, cool stadial events of MIS 3, and in two episodes of glaciomarine sedimentation from similar to 14.7 to 30.5 kyr BP (last glacial maximum, LGM), and from 44 to 50.4 kyr BP. Cordilleran Ice Sheet advancement onto the Vancouver Island continental shelf during the LGM led to intervals of increased terrigenous sedimentation and greatly reduced productivity not seen in the southern portion of the CCS, and along with ventilation of North Pacific Intermediate Waters, resulted in brief sedimentary oxic conditions. Article in Journal/Newspaper Greenland Greenland ice core ice core Ice Sheet North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Canada Greenland Pacific Paleoceanography 29 7 730 746 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Variations in chalcophile and redox-sensitive trace elements are examined at high-resolution intervals from a similar to 50 kyr long sediment core (MD02-2496) from the Vancouver Island margin. Enrichments of Ag, Cd, Re, U, and Mo above lithogenous levels, signifying sedimentary suboxia and anoxia, occurred during the early Holocene and Bolling/Allerod, and during warm interstadial events of Marine Isotope Stage (MIS) 3. Down-core trace element profiles co-vary with productivity proxy records (opal, CaCO3, and marine organic carbon), and with sedimentary nitrogen isotope ratios, which reflect variably enriched nitrate upwelled from intermediate waters that were transported northward from the Eastern Tropical North Pacific. The similarity of the MD02-2496 record with records from the southern portion of the California Current System (CCS), and to the Greenland ice core oxygen isotope record during warm climate intervals, suggests that sedimentary redox conditions along the California Current responded to local productivity, to North Atlantic climate change and to tropical Pacific surface water processes via long-distance teleconnections. Concentrations of trace elements and productivity proxies were relatively depleted during the Younger Dryas, cool stadial events of MIS 3, and in two episodes of glaciomarine sedimentation from similar to 14.7 to 30.5 kyr BP (last glacial maximum, LGM), and from 44 to 50.4 kyr BP. Cordilleran Ice Sheet advancement onto the Vancouver Island continental shelf during the LGM led to intervals of increased terrigenous sedimentation and greatly reduced productivity not seen in the southern portion of the CCS, and along with ventilation of North Pacific Intermediate Waters, resulted in brief sedimentary oxic conditions. |
format |
Article in Journal/Newspaper |
author |
Chang, Alice S. Pedersen, Thomas F. Hendy, Ingrid L. |
spellingShingle |
Chang, Alice S. Pedersen, Thomas F. Hendy, Ingrid L. Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
author_facet |
Chang, Alice S. Pedersen, Thomas F. Hendy, Ingrid L. |
author_sort |
Chang, Alice S. |
title |
Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
title_short |
Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
title_full |
Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
title_fullStr |
Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
title_full_unstemmed |
Effects of productivity, glaciation, and ventilation on late Quaternary sedimentary redox and trace element accumulation on the Vancouver Island margin, western Canada |
title_sort |
effects of productivity, glaciation, and ventilation on late quaternary sedimentary redox and trace element accumulation on the vancouver island margin, western canada |
publisher |
Amer Geophysical Union |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00290/40117/39132.pdf https://archimer.ifremer.fr/doc/00290/40117/39133.doc https://archimer.ifremer.fr/doc/00290/40117/39134.xls https://doi.org/10.1002/2013PA002581 https://archimer.ifremer.fr/doc/00290/40117/ |
geographic |
Canada Greenland Pacific |
geographic_facet |
Canada Greenland Pacific |
genre |
Greenland Greenland ice core ice core Ice Sheet North Atlantic |
genre_facet |
Greenland Greenland ice core ice core Ice Sheet North Atlantic |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2014-07-15 , Vol. 29 , N. 7 , P. 730-746 |
op_relation |
https://archimer.ifremer.fr/doc/00290/40117/39132.pdf https://archimer.ifremer.fr/doc/00290/40117/39133.doc https://archimer.ifremer.fr/doc/00290/40117/39134.xls doi:10.1002/2013PA002581 https://archimer.ifremer.fr/doc/00290/40117/ |
op_rights |
2014. American Geophysical Union. All Rights Reserved info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2013PA002581 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
7 |
container_start_page |
730 |
op_container_end_page |
746 |
_version_ |
1766019751736246272 |