Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302)
We reconstruct the latest Paleocene and early Eocene (∼57-50 Ma) environmental trends in the Arctic Ocean and focus on the Paleocene-Eocene thermal maximum (PETM) (∼55 Ma), using strata recovered from the Lomonosov Ridge by the Integrated Ocean Drilling Program Expedition 302. The Lomonosov Ridge wa...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/385789 2023-07-23T04:17:27+02:00 Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) Sluijs, A. Röhl, U. Schouten, S. Brumsack, H.-J. Sangiorgi, F. Sinninghe Damsté, J.S. Brinkhuis, H. Molecular palaeontology of marine sediments Palaeobotany and Palynology Dep Biologie Geochemistry 2008 image/pdf https://dspace.library.uu.nl/handle/1874/385789 en eng 0883-8305 https://dspace.library.uu.nl/handle/1874/385789 info:eu-repo/semantics/OpenAccess Aardwetenschappen/Geologie/Geofysica Life sciences Biologie/Milieukunde (BIOL) Geowetenschappen en aanverwante (milieu)wetenschappen Other biological specialities Taverne Oceanography Palaeontology Article 2008 ftunivutrecht 2023-07-02T02:52:27Z We reconstruct the latest Paleocene and early Eocene (∼57-50 Ma) environmental trends in the Arctic Ocean and focus on the Paleocene-Eocene thermal maximum (PETM) (∼55 Ma), using strata recovered from the Lomonosov Ridge by the Integrated Ocean Drilling Program Expedition 302. The Lomonosov Ridge was still partially subaerial during the latest Paleocene and earliest Eocene and gradually subsided during the early Eocene. Organic dinoflagellate cyst (dinocyst) assemblages point to brackish and productive surface waters throughout the latest Paleocene and early Eocene. Dinocyst assemblages are cosmopolitan during this time interval, suggesting warm conditions, which is corroborated by TEX86′-reconstructed temperatures of 15°-18°C. Inorganic geochemistry generally reflects reducing conditions within the sediment and euxinic conditions during the upper lower Eocene. Spectral analysis reveals that the cyclicity, recorded in X-ray fluorescence scanning Fe data from close to Eocene thermal maximum 2 (∼53 Ma, presence confirmed by dinocyst stratigraphy), is related to precession. Within the lower part of the PETM, proxy records indicate enhanced weathering, runoff, anoxia, and productivity along with sea level rise. On the basis of total organic carbon content and variations in sediment accumulation rates, excess organic carbon burial in the Arctic Ocean appears to have contributed significantly to the sequestration of injected carbon during the PETM. Article in Journal/Newspaper Arctic Arctic Ocean Lomonosov Ridge Utrecht University Repository Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Aardwetenschappen/Geologie/Geofysica Life sciences Biologie/Milieukunde (BIOL) Geowetenschappen en aanverwante (milieu)wetenschappen Other biological specialities Taverne Oceanography Palaeontology |
spellingShingle |
Aardwetenschappen/Geologie/Geofysica Life sciences Biologie/Milieukunde (BIOL) Geowetenschappen en aanverwante (milieu)wetenschappen Other biological specialities Taverne Oceanography Palaeontology Sluijs, A. Röhl, U. Schouten, S. Brumsack, H.-J. Sangiorgi, F. Sinninghe Damsté, J.S. Brinkhuis, H. Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
topic_facet |
Aardwetenschappen/Geologie/Geofysica Life sciences Biologie/Milieukunde (BIOL) Geowetenschappen en aanverwante (milieu)wetenschappen Other biological specialities Taverne Oceanography Palaeontology |
description |
We reconstruct the latest Paleocene and early Eocene (∼57-50 Ma) environmental trends in the Arctic Ocean and focus on the Paleocene-Eocene thermal maximum (PETM) (∼55 Ma), using strata recovered from the Lomonosov Ridge by the Integrated Ocean Drilling Program Expedition 302. The Lomonosov Ridge was still partially subaerial during the latest Paleocene and earliest Eocene and gradually subsided during the early Eocene. Organic dinoflagellate cyst (dinocyst) assemblages point to brackish and productive surface waters throughout the latest Paleocene and early Eocene. Dinocyst assemblages are cosmopolitan during this time interval, suggesting warm conditions, which is corroborated by TEX86′-reconstructed temperatures of 15°-18°C. Inorganic geochemistry generally reflects reducing conditions within the sediment and euxinic conditions during the upper lower Eocene. Spectral analysis reveals that the cyclicity, recorded in X-ray fluorescence scanning Fe data from close to Eocene thermal maximum 2 (∼53 Ma, presence confirmed by dinocyst stratigraphy), is related to precession. Within the lower part of the PETM, proxy records indicate enhanced weathering, runoff, anoxia, and productivity along with sea level rise. On the basis of total organic carbon content and variations in sediment accumulation rates, excess organic carbon burial in the Arctic Ocean appears to have contributed significantly to the sequestration of injected carbon during the PETM. |
author2 |
Molecular palaeontology of marine sediments Palaeobotany and Palynology Dep Biologie Geochemistry |
format |
Article in Journal/Newspaper |
author |
Sluijs, A. Röhl, U. Schouten, S. Brumsack, H.-J. Sangiorgi, F. Sinninghe Damsté, J.S. Brinkhuis, H. |
author_facet |
Sluijs, A. Röhl, U. Schouten, S. Brumsack, H.-J. Sangiorgi, F. Sinninghe Damsté, J.S. Brinkhuis, H. |
author_sort |
Sluijs, A. |
title |
Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
title_short |
Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
title_full |
Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
title_fullStr |
Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
title_full_unstemmed |
Arctic late Paleocene-early Eocene paleoenvironments with special emphasis on the Paleocene-Eocene thermal maximum (Lomonosov Ridge, Integrated Ocean Drilling Program Expedition 302) |
title_sort |
arctic late paleocene-early eocene paleoenvironments with special emphasis on the paleocene-eocene thermal maximum (lomonosov ridge, integrated ocean drilling program expedition 302) |
publishDate |
2008 |
url |
https://dspace.library.uu.nl/handle/1874/385789 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Lomonosov Ridge |
genre_facet |
Arctic Arctic Ocean Lomonosov Ridge |
op_relation |
0883-8305 https://dspace.library.uu.nl/handle/1874/385789 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772179218309840896 |