Paleocene–Eocene age glendonites from the Mid-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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ftdoajarticles:oai:doaj.org/article:8d0b748405e049839cb83fe3e6a961ff 2024-02-04T10:02:13+01:00 Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? M. L. Vickers M. T. Jones J. Longman D. Evans C. V. Ullmann E. Wulfsberg Stokke M. Vickers J. Frieling D. T. Harper V. J. Clementi 2024-01-01T00:00:00Z https://doi.org/10.5194/cp-20-1-2024 https://doaj.org/article/8d0b748405e049839cb83fe3e6a961ff EN eng Copernicus Publications https://cp.copernicus.org/articles/20/1/2024/cp-20-1-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-1-2024 1814-9324 1814-9332 https://doaj.org/article/8d0b748405e049839cb83fe3e6a961ff Climate of the Past, Vol 20, Pp 1-23 (2024) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2024 ftdoajarticles https://doi.org/10.5194/cp-20-1-2024 2024-01-07T01:42:13Z 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 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 IODP 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 localized 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 Directory of Open Access Journals: DOAJ Articles Svalbard Climate of the Past 20 1 1 23 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 M. L. Vickers M. T. Jones J. Longman D. Evans C. V. Ullmann E. Wulfsberg Stokke M. Vickers J. Frieling D. T. Harper V. J. Clementi Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 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 IODP 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 localized 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 |
M. L. Vickers M. T. Jones J. Longman D. Evans C. V. Ullmann E. Wulfsberg Stokke M. Vickers J. Frieling D. T. Harper V. J. Clementi |
author_facet |
M. L. Vickers M. T. Jones J. Longman D. Evans C. V. Ullmann E. Wulfsberg Stokke M. Vickers J. Frieling D. T. Harper V. J. Clementi |
author_sort |
M. L. Vickers |
title |
Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
title_short |
Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
title_full |
Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
title_fullStr |
Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
title_full_unstemmed |
Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse? |
title_sort |
paleocene–eocene age glendonites from the mid-norwegian margin – indicators of cold snaps in the hothouse? |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/cp-20-1-2024 https://doaj.org/article/8d0b748405e049839cb83fe3e6a961ff |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Nordic Seas North Atlantic Svalbard |
genre_facet |
Nordic Seas North Atlantic Svalbard |
op_source |
Climate of the Past, Vol 20, Pp 1-23 (2024) |
op_relation |
https://cp.copernicus.org/articles/20/1/2024/cp-20-1-2024.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-20-1-2024 1814-9324 1814-9332 https://doaj.org/article/8d0b748405e049839cb83fe3e6a961ff |
op_doi |
https://doi.org/10.5194/cp-20-1-2024 |
container_title |
Climate of the Past |
container_volume |
20 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
23 |
_version_ |
1789968681573285888 |