High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin)
A newly located exposure of the Niveau Thomel, an organic-rich level at the Cenomanian–Tur- onian boundary, provides a highly expanded record of Oceanic Anoxic Event (OAE) 2, except for the lower relatively condensed glauconite-rich part of the section. The new locality, close to Barrême in the Voc...
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Gebruder Borntraeger
2019
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Online Access: | http://hdl.handle.net/2434/593375 https://doi.org/10.1127/nos/2018/0445 |
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ftunivmilanoair:oai:air.unimi.it:2434/593375 2024-04-21T08:10:35+00:00 High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) Andrew S. Gale Hugh C. Jenkyns Harilaos Tsikos Yvonne van Breugel Jaap S. Sinninghe Damsté Cinzia Bottini Elisabetta Erba Fabio Russo Francesca Falzoni Maria Rose Petrizzo Alexander J. Dickson David S. Wray A.S. Gale H.C. Jenkyn H. Tsiko Y. van Breugel J.S. Sinninghe Damsté C. Bottini E. Erba F. Russo F. Falzoni M.R. Petrizzo A.J. Dickson D.S. Wray 2019 http://hdl.handle.net/2434/593375 https://doi.org/10.1127/nos/2018/0445 eng eng Gebruder Borntraeger info:eu-repo/semantics/altIdentifier/wos/WOS:000456251400005 volume:52 issue:1 firstpage:97 lastpage:129 numberofpages:33 journal:NEWSLETTERS ON STRATIGRAPHY http://hdl.handle.net/2434/593375 doi:10.1127/nos/2018/0445 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85056456318 info:eu-repo/semantics/openAccess Cenomanian–Turonian boundary biostratigraphy geochemistry Vocontian Basin Oceanic Anoxic Event 2 Settore GEO/01 - Paleontologia e Paleoecologia Settore GEO/02 - Geologia Stratigrafica e Sedimentologica info:eu-repo/semantics/article 2019 ftunivmilanoair https://doi.org/10.1127/nos/2018/0445 2024-03-27T16:43:44Z A newly located exposure of the Niveau Thomel, an organic-rich level at the Cenomanian–Tur- onian boundary, provides a highly expanded record of Oceanic Anoxic Event (OAE) 2, except for the lower relatively condensed glauconite-rich part of the section. The new locality, close to Barrême in the Vocontian Basin, SE France, is developed in deep-water hemi-pelagic facies (shales, marls, marly limestones, variably enriched in organic matter) and provides an improved understanding of palaeoceanographic events associated with OAE 2. Investigation of the biostratigraphy (nannofossils and planktonic foraminifera), organic and inorganic geochemistry (bulk carbonate δ18O, total organic carbon (TOC), bulk organic, biomarker-specific and carbonate δ13C, major and trace elements, and Rock-Eval data) has allowed characterization of the sediments in great detail. The combined study further constrains the detailed relationship between bio- and chemostratigraphy (particularly with respect to the details of the well-displayed positive carbon-isotope excursion) for this interval. The section also provides new evidence, in the form of a positive oxygen-isotope excursion and an offset between carbonate and organic-carbon carbon-isotope records, which confirms the importance of cooling accompanied by a drop in dissolved CO2 in near-surface waters during the Plenus Cold Event that characterized the early part of OAE 2. Evidence for increased oxygenation of bottom waters, together with elevated concentrations of redox-sensitive and chalcophilic elements registered elsewhere through the level of the Plenus Cold Event, may be reflected in enhanced concentrations of iron (in glauconite) and nickel in coeval strata from the Clot Chevalier section. Article in Journal/Newspaper Planktonic foraminifera The University of Milan: Archivio Istituzionale della Ricerca (AIR) Newsletters on Stratigraphy 52 1 97 129 |
institution |
Open Polar |
collection |
The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Cenomanian–Turonian boundary biostratigraphy geochemistry Vocontian Basin Oceanic Anoxic Event 2 Settore GEO/01 - Paleontologia e Paleoecologia Settore GEO/02 - Geologia Stratigrafica e Sedimentologica |
spellingShingle |
Cenomanian–Turonian boundary biostratigraphy geochemistry Vocontian Basin Oceanic Anoxic Event 2 Settore GEO/01 - Paleontologia e Paleoecologia Settore GEO/02 - Geologia Stratigrafica e Sedimentologica Andrew S. Gale Hugh C. Jenkyns Harilaos Tsikos Yvonne van Breugel Jaap S. Sinninghe Damsté Cinzia Bottini Elisabetta Erba Fabio Russo Francesca Falzoni Maria Rose Petrizzo Alexander J. Dickson David S. Wray High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
topic_facet |
Cenomanian–Turonian boundary biostratigraphy geochemistry Vocontian Basin Oceanic Anoxic Event 2 Settore GEO/01 - Paleontologia e Paleoecologia Settore GEO/02 - Geologia Stratigrafica e Sedimentologica |
description |
A newly located exposure of the Niveau Thomel, an organic-rich level at the Cenomanian–Tur- onian boundary, provides a highly expanded record of Oceanic Anoxic Event (OAE) 2, except for the lower relatively condensed glauconite-rich part of the section. The new locality, close to Barrême in the Vocontian Basin, SE France, is developed in deep-water hemi-pelagic facies (shales, marls, marly limestones, variably enriched in organic matter) and provides an improved understanding of palaeoceanographic events associated with OAE 2. Investigation of the biostratigraphy (nannofossils and planktonic foraminifera), organic and inorganic geochemistry (bulk carbonate δ18O, total organic carbon (TOC), bulk organic, biomarker-specific and carbonate δ13C, major and trace elements, and Rock-Eval data) has allowed characterization of the sediments in great detail. The combined study further constrains the detailed relationship between bio- and chemostratigraphy (particularly with respect to the details of the well-displayed positive carbon-isotope excursion) for this interval. The section also provides new evidence, in the form of a positive oxygen-isotope excursion and an offset between carbonate and organic-carbon carbon-isotope records, which confirms the importance of cooling accompanied by a drop in dissolved CO2 in near-surface waters during the Plenus Cold Event that characterized the early part of OAE 2. Evidence for increased oxygenation of bottom waters, together with elevated concentrations of redox-sensitive and chalcophilic elements registered elsewhere through the level of the Plenus Cold Event, may be reflected in enhanced concentrations of iron (in glauconite) and nickel in coeval strata from the Clot Chevalier section. |
author2 |
A.S. Gale H.C. Jenkyn H. Tsiko Y. van Breugel J.S. Sinninghe Damsté C. Bottini E. Erba F. Russo F. Falzoni M.R. Petrizzo A.J. Dickson D.S. Wray |
format |
Article in Journal/Newspaper |
author |
Andrew S. Gale Hugh C. Jenkyns Harilaos Tsikos Yvonne van Breugel Jaap S. Sinninghe Damsté Cinzia Bottini Elisabetta Erba Fabio Russo Francesca Falzoni Maria Rose Petrizzo Alexander J. Dickson David S. Wray |
author_facet |
Andrew S. Gale Hugh C. Jenkyns Harilaos Tsikos Yvonne van Breugel Jaap S. Sinninghe Damsté Cinzia Bottini Elisabetta Erba Fabio Russo Francesca Falzoni Maria Rose Petrizzo Alexander J. Dickson David S. Wray |
author_sort |
Andrew S. Gale |
title |
High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
title_short |
High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
title_full |
High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
title_fullStr |
High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
title_full_unstemmed |
High-resolution bio- and chemostratigraphy of an expanded record of Oceanic Anoxic Event 2 (Late Cenomanian–Early Turonian) at Clot Chevalier, near Barrême, SE France (Vocontian Basin) |
title_sort |
high-resolution bio- and chemostratigraphy of an expanded record of oceanic anoxic event 2 (late cenomanian–early turonian) at clot chevalier, near barrême, se france (vocontian basin) |
publisher |
Gebruder Borntraeger |
publishDate |
2019 |
url |
http://hdl.handle.net/2434/593375 https://doi.org/10.1127/nos/2018/0445 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000456251400005 volume:52 issue:1 firstpage:97 lastpage:129 numberofpages:33 journal:NEWSLETTERS ON STRATIGRAPHY http://hdl.handle.net/2434/593375 doi:10.1127/nos/2018/0445 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85056456318 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1127/nos/2018/0445 |
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