"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian
The Coniacian–Santonian time interval is the inferred time of oceanic anoxic event 3 (OAE 3), the last of the Cretaceous OAEs. A detailed look on the temporal and spatial distribution of organic-rich deposits attributed to OAE 3 suggests that black shale occurrences are restricted to the equatorial...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ed24aff506504dbc805cdb4b82f8a851 2023-05-15T17:35:00+02:00 "OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian M. Wagreich 2012-09-01 https://doi.org/10.5194/cp-8-1447-2012 http://www.clim-past.net/8/1447/2012/cp-8-1447-2012.pdf https://doaj.org/article/ed24aff506504dbc805cdb4b82f8a851 en eng Copernicus Publications doi:10.5194/cp-8-1447-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1447/2012/cp-8-1447-2012.pdf https://doaj.org/article/ed24aff506504dbc805cdb4b82f8a851 undefined Climate of the Past, Vol 8, Iss 5, Pp 1447-1455 (2012) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/cp-8-1447-2012 2023-01-22T17:49:54Z The Coniacian–Santonian time interval is the inferred time of oceanic anoxic event 3 (OAE 3), the last of the Cretaceous OAEs. A detailed look on the temporal and spatial distribution of organic-rich deposits attributed to OAE 3 suggests that black shale occurrences are restricted to the equatorial to mid-latitudinal Atlantic and adjacent basins, shelves and epicontinental seas like parts of the Caribbean, the Maracaibo Basin and the Western Interior Basin, and are largely absent in the Tethys, the North Atlantic, the southern South Atlantic, and the Pacific. Here, oxic bottom waters prevailed as indicated by the widespread occurrence of red deep-marine CORBs (Cretaceous Oceanic Red Beds). Widespread CORB sedimentation started during the Turonian after Oceanic Anoxic Event 2 (OAE 2) except in the Atlantic realm where organic-rich strata continue up to the Santonian. The temporal distribution of black shales attributed to OAE 3 indicates that organic-rich strata do not define a single and distinct short-time event, but are distributed over a longer time span and occur in different basins during different times. This suggests intermittent and regional anoxic conditions from the Coniacian to the Santonian. A comparison of time-correlated high-resolution δ13C curves for this interval indicates several minor positive excursions of up to 0.5‰, probably as a result of massive organic carbon burial cycles in the Atlantic. Regional wind-induced upwelling and restricted deep basins may have contributed to the development of anoxia during a time interval of widespread oxic conditions, thus highlighting the regional character of inferred OAE 3 as regional Atlantic event(s). Article in Journal/Newspaper North Atlantic Unknown Pacific Climate of the Past 8 5 1447 1455 |
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geo M. Wagreich "OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
topic_facet |
geo |
description |
The Coniacian–Santonian time interval is the inferred time of oceanic anoxic event 3 (OAE 3), the last of the Cretaceous OAEs. A detailed look on the temporal and spatial distribution of organic-rich deposits attributed to OAE 3 suggests that black shale occurrences are restricted to the equatorial to mid-latitudinal Atlantic and adjacent basins, shelves and epicontinental seas like parts of the Caribbean, the Maracaibo Basin and the Western Interior Basin, and are largely absent in the Tethys, the North Atlantic, the southern South Atlantic, and the Pacific. Here, oxic bottom waters prevailed as indicated by the widespread occurrence of red deep-marine CORBs (Cretaceous Oceanic Red Beds). Widespread CORB sedimentation started during the Turonian after Oceanic Anoxic Event 2 (OAE 2) except in the Atlantic realm where organic-rich strata continue up to the Santonian. The temporal distribution of black shales attributed to OAE 3 indicates that organic-rich strata do not define a single and distinct short-time event, but are distributed over a longer time span and occur in different basins during different times. This suggests intermittent and regional anoxic conditions from the Coniacian to the Santonian. A comparison of time-correlated high-resolution δ13C curves for this interval indicates several minor positive excursions of up to 0.5‰, probably as a result of massive organic carbon burial cycles in the Atlantic. Regional wind-induced upwelling and restricted deep basins may have contributed to the development of anoxia during a time interval of widespread oxic conditions, thus highlighting the regional character of inferred OAE 3 as regional Atlantic event(s). |
format |
Article in Journal/Newspaper |
author |
M. Wagreich |
author_facet |
M. Wagreich |
author_sort |
M. Wagreich |
title |
"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
title_short |
"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
title_full |
"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
title_fullStr |
"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
title_full_unstemmed |
"OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian |
title_sort |
"oae 3" – regional atlantic organic carbon burial during the coniacian–santonian |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1447-2012 http://www.clim-past.net/8/1447/2012/cp-8-1447-2012.pdf https://doaj.org/article/ed24aff506504dbc805cdb4b82f8a851 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past, Vol 8, Iss 5, Pp 1447-1455 (2012) |
op_relation |
doi:10.5194/cp-8-1447-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1447/2012/cp-8-1447-2012.pdf https://doaj.org/article/ed24aff506504dbc805cdb4b82f8a851 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-8-1447-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
5 |
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1447 |
op_container_end_page |
1455 |
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1766134005067939840 |