Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse?
The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered >1300 m of pristinely preserved, volcanic ash-rich sediments deposited during the late Paleocene and early Eocene, from close to the centre of the North Atlantic Igneous Province (NAIP). Remarkab...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00067995 2023-08-27T04:10:40+02:00 Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? Vickers, Madeleine L. Jones, Morgan T. Longman, Jack Evans, David Ullmann, Clemens V. Stokke, Ella Wulfsberg Vickers, Martin Frieling, Joost Harper, Dustin T. Clementi, Vincent J. 2023-08 electronic https://doi.org/10.5194/egusphere-2023-1651 https://noa.gwlb.de/receive/cop_mods_00067995 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066432/egusphere-2023-1651.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1651/egusphere-2023-1651.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-1651 https://noa.gwlb.de/receive/cop_mods_00067995 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066432/egusphere-2023-1651.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1651/egusphere-2023-1651.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-1651 2023-08-06T23:19:55Z The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered >1300 m of pristinely preserved, volcanic ash-rich sediments deposited during the late Paleocene and early Eocene, from close to the centre of the North Atlantic Igneous Province (NAIP). Remarkably, many of these cores contain glendonites, pseudomorphs after the purported cold-water mineral ikaite, from sediments dated to the late Paleocene, Paleocene – Eocene boundary and early Eocene. These time intervals span some of the hottest climates of the Cenozoic, including the Paleocene-Eocene Thermal Maximum (PETM). Global deep ocean temperatures are not thought to have dropped below 10 °C at any point during this time, making the occurrence of supposedly cold-water (near-freezing temperature) glendonite pseudomorphs seemingly paradoxical. This study presents a detailed sedimentological, geochemical, and microscopic study of the Exp. 396 glendonites, and presents an updated model for the ikaite-to-calcite transformation for these glendonites. Specifically, we show that early diagenesis of basaltic ashes of the NAIP appear to have chemically promoted ikaite growth in the sediments in this region. Together with existing knowledge of late Paleocene and early Eocene glendonites from Svalbard to the north, and early Eocene glendonites from Denmark to the south, these new glendonite finds possibly imply episodic, short-duration, and likely localised cooling in the Nordic Seas region, which may have been directly or indirectly linked to the emplacement of the NAIP. Article in Journal/Newspaper Nordic Seas North Atlantic Svalbard Niedersächsisches Online-Archiv NOA Svalbard |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Vickers, Madeleine L. Jones, Morgan T. Longman, Jack Evans, David Ullmann, Clemens V. Stokke, Ella Wulfsberg Vickers, Martin Frieling, Joost Harper, Dustin T. Clementi, Vincent J. Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
topic_facet |
article Verlagsveröffentlichung |
description |
The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered >1300 m of pristinely preserved, volcanic ash-rich sediments deposited during the late Paleocene and early Eocene, from close to the centre of the North Atlantic Igneous Province (NAIP). Remarkably, many of these cores contain glendonites, pseudomorphs after the purported cold-water mineral ikaite, from sediments dated to the late Paleocene, Paleocene – Eocene boundary and early Eocene. These time intervals span some of the hottest climates of the Cenozoic, including the Paleocene-Eocene Thermal Maximum (PETM). Global deep ocean temperatures are not thought to have dropped below 10 °C at any point during this time, making the occurrence of supposedly cold-water (near-freezing temperature) glendonite pseudomorphs seemingly paradoxical. This study presents a detailed sedimentological, geochemical, and microscopic study of the Exp. 396 glendonites, and presents an updated model for the ikaite-to-calcite transformation for these glendonites. Specifically, we show that early diagenesis of basaltic ashes of the NAIP appear to have chemically promoted ikaite growth in the sediments in this region. Together with existing knowledge of late Paleocene and early Eocene glendonites from Svalbard to the north, and early Eocene glendonites from Denmark to the south, these new glendonite finds possibly imply episodic, short-duration, and likely localised cooling in the Nordic Seas region, which may have been directly or indirectly linked to the emplacement of the NAIP. |
format |
Article in Journal/Newspaper |
author |
Vickers, Madeleine L. Jones, Morgan T. Longman, Jack Evans, David Ullmann, Clemens V. Stokke, Ella Wulfsberg Vickers, Martin Frieling, Joost Harper, Dustin T. Clementi, Vincent J. |
author_facet |
Vickers, Madeleine L. Jones, Morgan T. Longman, Jack Evans, David Ullmann, Clemens V. Stokke, Ella Wulfsberg Vickers, Martin Frieling, Joost Harper, Dustin T. Clementi, Vincent J. |
author_sort |
Vickers, Madeleine L. |
title |
Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
title_short |
Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
title_full |
Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
title_fullStr |
Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
title_full_unstemmed |
Paleocene-Eocene age glendonites from the Norwegian Margin – Indicators of cold snaps in the hothouse? |
title_sort |
paleocene-eocene age glendonites from the norwegian margin – indicators of cold snaps in the hothouse? |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-1651 https://noa.gwlb.de/receive/cop_mods_00067995 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066432/egusphere-2023-1651.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1651/egusphere-2023-1651.pdf |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Nordic Seas North Atlantic Svalbard |
genre_facet |
Nordic Seas North Atlantic Svalbard |
op_relation |
https://doi.org/10.5194/egusphere-2023-1651 https://noa.gwlb.de/receive/cop_mods_00067995 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00066432/egusphere-2023-1651.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1651/egusphere-2023-1651.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-1651 |
_version_ |
1775352898850390016 |