Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse?
<p>The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered <span class="inline-formula">></span> 1300 m of pristinely preserved, volcanic-ash-rich sediments deposited during the late Paleocene and early Eocene from clos...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2024-01-01
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| Series: | Climate of the Past |
| Online Access: | https://cp.copernicus.org/articles/20/1/2024/cp-20-1-2024.pdf |
| _version_ | 1797367552299499520 |
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| author | M. L. Vickers M. T. Jones M. T. Jones J. Longman D. Evans D. Evans 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 M. T. Jones J. Longman D. Evans D. Evans D. Evans C. V. Ullmann E. Wulfsberg Stokke M. Vickers J. Frieling D. T. Harper V. J. Clementi |
| author_sort | M. L. Vickers |
| collection | DOAJ |
| description | <p>The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered <span class="inline-formula">></span> 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 <span class="inline-formula"><sup>∘</sup></span>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.</p> |
| first_indexed | 2024-03-08T17:19:58Z |
| format | Article |
| id | doaj.art-8d0b748405e049839cb83fe3e6a961ff |
| institution | Directory Open Access Journal |
| issn | 1814-9324 1814-9332 |
| language | English |
| last_indexed | 2024-03-08T17:19:58Z |
| publishDate | 2024-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj.art-8d0b748405e049839cb83fe3e6a961ff2024-01-03T07:31:09ZengCopernicus PublicationsClimate of the Past1814-93241814-93322024-01-012012310.5194/cp-20-1-2024Paleocene–Eocene age glendonites from the Mid-Norwegian Margin – indicators of cold snaps in the hothouse?M. L. Vickers0M. T. Jones1M. T. Jones2J. Longman3D. Evans4D. Evans5D. Evans6C. V. Ullmann7E. Wulfsberg Stokke8M. Vickers9J. Frieling10D. T. Harper11V. J. Clementi12Centre for Planetary Habitability (PHAB), University of Oslo, P.O. Box 1028 Blindern, 0315 Oslo, NorwayCentre for Planetary Habitability (PHAB), University of Oslo, P.O. Box 1028 Blindern, 0315 Oslo, NorwayDepartment of Ecology and Environmental Science (EMG), Umeå University, 901 87 Umeå, SwedenDepartment of Geography and Environmental Sciences, Northumbria University, Newcastle-upon-Tyne NE1 8ST, UKInstitute of Geosciences, Goethe University Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, GermanyFIERCE, Frankfurt Isotope & Element Research Center, Goethe University Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, GermanySchool of Ocean and Earth Science, University of Southampton, Southampton SO14 3ZH, UKCamborne School of Mines, University of Exeter, Penryn Campus, Penryn TR10 9FE, UKCentre for Planetary Habitability (PHAB), University of Oslo, P.O. Box 1028 Blindern, 0315 Oslo, NorwayDepartment of Chemistry, UCL, 20 Gordon Street, London WC1H 0AJ, UKDepartment of Earth Sciences, University of Oxford, Oxford OX1 3AN, UKDepartment of Geology & Geophysics, University of Utah, Salt Lake City, UT 84112, USADepartment of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, USA<p>The International Ocean Discovery Program (IODP) Expedition 396 to the mid-Norwegian margin recovered <span class="inline-formula">></span> 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 <span class="inline-formula"><sup>∘</sup></span>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.</p>https://cp.copernicus.org/articles/20/1/2024/cp-20-1-2024.pdf |
| spellingShingle | M. L. Vickers M. T. Jones M. T. Jones J. Longman D. Evans D. Evans 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? Climate of the Past |
| title | 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_short | 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 |
| url | https://cp.copernicus.org/articles/20/1/2024/cp-20-1-2024.pdf |
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