Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP
Unique marine sediment cores retrieved from the southwestern slope of the Iceland-Faroe Ridge (IFR), close to the main axis of the Iceland-Scotland Overflow Water (ISOW), revealed prominent sedimentary cycles reflecting near-bottom current dynamics, sediment transport, and deposition, coincident wit...
Published in: | Geochemistry, Geophysics, Geosystems |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://research.vu.nl/en/publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 https://doi.org/10.1029/2019GC008298 https://hdl.handle.net/1871.1/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 http://www.scopus.com/inward/record.url?scp=85070897237&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85070897237&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 2024-06-23T07:52:45+00:00 Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP Mirzaloo, M. Nürnberg, D. Kienast, M. van der Lubbe, H. J.L. 2019-08 https://research.vu.nl/en/publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 https://doi.org/10.1029/2019GC008298 https://hdl.handle.net/1871.1/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 http://www.scopus.com/inward/record.url?scp=85070897237&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85070897237&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 info:eu-repo/semantics/openAccess Mirzaloo , M , Nürnberg , D , Kienast , M & van der Lubbe , H J L 2019 , ' Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP ' , Geochemistry, Geophysics, Geosystems , vol. 20 , no. 8 , pp. 4184-4201 . https://doi.org/10.1029/2019GC008298 grain size end-members Iceland-Scotland Overflow Oscillation sediment provenances sediment transport /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2019 ftvuamstcris https://doi.org/10.1029/2019GC008298 2024-05-30T00:17:27Z Unique marine sediment cores retrieved from the southwestern slope of the Iceland-Faroe Ridge (IFR), close to the main axis of the Iceland-Scotland Overflow Water (ISOW), revealed prominent sedimentary cycles reflecting near-bottom current dynamics, sediment transport, and deposition, coincident with Dansgaard-Oeschger cycles and deglacial perturbations of the Atlantic Meridional Overturning Circulation. The transition between Greenland Stadials (GSs) and Greenland Interstadials (GIs) follows a distinct, recurring sedimentation pattern. Basaltic (Ti-rich) silts were transported from local volcanic sources by strong bottom currents and deposited during GIs comparable to modern ocean circulation. Finer-grained felsic (K-rich) sediments were deposited during GSs, when Iceland-Scotland Overflow was weak. Possible felsic source areas include British-Ireland and/or Fennoscandian shelf areas. A cyclic sawtooth pattern of bottom current strength is characterized by gradual intensification during GIs followed by a sharp decline toward GSs as is documented at core sites along the flank of Reykjanes Ridge. The cores north of the Faroe Channel instead document the opposite pattern. This suggests that the near-bottom currents along the Reykjanes Ridge are strongly controlled by the flow cascading over the IFR. Heinrich-(like) HS-1 and HS-2, are characterized by the deposition of very fine felsic sediments pointing to weakened bottom currents. Distinct coarse-grained intervals of ice-rafted debris are absent from the sediment records, although pebble- and gravel-sized ice-rafted debris is irregularly distributed throughout the fine sediment matrix. Near-bottom currents are considered to have a major control on the lithogenic sediment deposition southwest of the IFR and further downstream. Article in Journal/Newspaper Fennoscandian Greenland Iceland Vrije Universiteit Amsterdam (VU): Research Portal Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geochemistry, Geophysics, Geosystems 20 8 4184 4201 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
grain size end-members Iceland-Scotland Overflow Oscillation sediment provenances sediment transport /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
grain size end-members Iceland-Scotland Overflow Oscillation sediment provenances sediment transport /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Mirzaloo, M. Nürnberg, D. Kienast, M. van der Lubbe, H. J.L. Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
topic_facet |
grain size end-members Iceland-Scotland Overflow Oscillation sediment provenances sediment transport /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Unique marine sediment cores retrieved from the southwestern slope of the Iceland-Faroe Ridge (IFR), close to the main axis of the Iceland-Scotland Overflow Water (ISOW), revealed prominent sedimentary cycles reflecting near-bottom current dynamics, sediment transport, and deposition, coincident with Dansgaard-Oeschger cycles and deglacial perturbations of the Atlantic Meridional Overturning Circulation. The transition between Greenland Stadials (GSs) and Greenland Interstadials (GIs) follows a distinct, recurring sedimentation pattern. Basaltic (Ti-rich) silts were transported from local volcanic sources by strong bottom currents and deposited during GIs comparable to modern ocean circulation. Finer-grained felsic (K-rich) sediments were deposited during GSs, when Iceland-Scotland Overflow was weak. Possible felsic source areas include British-Ireland and/or Fennoscandian shelf areas. A cyclic sawtooth pattern of bottom current strength is characterized by gradual intensification during GIs followed by a sharp decline toward GSs as is documented at core sites along the flank of Reykjanes Ridge. The cores north of the Faroe Channel instead document the opposite pattern. This suggests that the near-bottom currents along the Reykjanes Ridge are strongly controlled by the flow cascading over the IFR. Heinrich-(like) HS-1 and HS-2, are characterized by the deposition of very fine felsic sediments pointing to weakened bottom currents. Distinct coarse-grained intervals of ice-rafted debris are absent from the sediment records, although pebble- and gravel-sized ice-rafted debris is irregularly distributed throughout the fine sediment matrix. Near-bottom currents are considered to have a major control on the lithogenic sediment deposition southwest of the IFR and further downstream. |
format |
Article in Journal/Newspaper |
author |
Mirzaloo, M. Nürnberg, D. Kienast, M. van der Lubbe, H. J.L. |
author_facet |
Mirzaloo, M. Nürnberg, D. Kienast, M. van der Lubbe, H. J.L. |
author_sort |
Mirzaloo, M. |
title |
Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
title_short |
Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
title_full |
Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
title_fullStr |
Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
title_full_unstemmed |
Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP |
title_sort |
synchronous changes in sediment transport and provenance at the iceland-faroe ridge linked to millennial climate variability from 55 to 6 ka bp |
publishDate |
2019 |
url |
https://research.vu.nl/en/publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 https://doi.org/10.1029/2019GC008298 https://hdl.handle.net/1871.1/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 http://www.scopus.com/inward/record.url?scp=85070897237&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85070897237&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Greenland Reykjanes |
geographic_facet |
Greenland Reykjanes |
genre |
Fennoscandian Greenland Iceland |
genre_facet |
Fennoscandian Greenland Iceland |
op_source |
Mirzaloo , M , Nürnberg , D , Kienast , M & van der Lubbe , H J L 2019 , ' Synchronous Changes in Sediment Transport and Provenance at the Iceland-Faroe Ridge Linked to Millennial Climate Variability From 55 to 6 ka BP ' , Geochemistry, Geophysics, Geosystems , vol. 20 , no. 8 , pp. 4184-4201 . https://doi.org/10.1029/2019GC008298 |
op_relation |
https://research.vu.nl/en/publications/9ad2b521-1973-4357-98e9-edb2ac3d5fc7 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2019GC008298 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
20 |
container_issue |
8 |
container_start_page |
4184 |
op_container_end_page |
4201 |
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1802644124331933696 |