A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data
International audience High-resolution clay mineral and δ18Ocarb analyses have been performed on three sections of Valanginian age (Early Cretaceous), from northwestern (~20–30°N) and southern (~53°S) Tethyan realms. The data have been integrated in a large set of published mineralogical (clays), an...
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Online Access: | https://hal.science/hal-02448620 https://hal.science/hal-02448620/document https://hal.science/hal-02448620/file/1-s2.0-S0012825219306816-am.pdf https://doi.org/10.1016/j.earscirev.2020.103092 |
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ftuniparissaclay:oai:HAL:hal-02448620v1 2024-09-15T18:23:04+00:00 A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data Charbonnier, Guillaume Duchamp-Alphonse, Stéphanie Deconinck, Jean-François Adatte, Thierry Spangenberg, Jorge Colin, Christophe Föllmi, Karl Université de Lausanne = University of Lausanne (UNIL) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut des Dynamiques de la Surface Terrestre Lausanne (IDYST) We thank the Swiss National Science Foundation (project 200021_168994) and the University of Lausanne for financial and logistic supports. 2020-03 https://hal.science/hal-02448620 https://hal.science/hal-02448620/document https://hal.science/hal-02448620/file/1-s2.0-S0012825219306816-am.pdf https://doi.org/10.1016/j.earscirev.2020.103092 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2020.103092 hal-02448620 https://hal.science/hal-02448620 https://hal.science/hal-02448620/document https://hal.science/hal-02448620/file/1-s2.0-S0012825219306816-am.pdf doi:10.1016/j.earscirev.2020.103092 info:eu-repo/semantics/OpenAccess ISSN: 0012-8252 Earth-Science Reviews https://hal.science/hal-02448620 Earth-Science Reviews, 2020, 202, pp.103092. ⟨10.1016/j.earscirev.2020.103092⟩ hydrolysing conditions temperature range palaeoclimate belt volcanic activity global61 reconstruction Valanginian [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2020 ftuniparissaclay https://doi.org/10.1016/j.earscirev.2020.103092 2024-08-30T01:48:44Z International audience High-resolution clay mineral and δ18Ocarb analyses have been performed on three sections of Valanginian age (Early Cretaceous), from northwestern (~20–30°N) and southern (~53°S) Tethyan realms. The data have been integrated in a large set of published mineralogical (clays), and geochemical (δ18Ocarb, δ18Obivalve, δ18Olenticulina, δ18Obelemnite, and TEX86) data from 17 sections, situated between ~45°N and ~53°S. Based on this data set, we provide new insights into Valanginian climate conditions from a wide range of palaeolatitudes. We highlight climate trends within specific areas and identify main climate belts. In the Proto-North Atlantic realm (~15–17°N) large amounts of smectite together with the occurrence of palygorskite testify for a semi-arid climate belt throughout the Valanginian. Significant variations in kaolinite content in the northwestern Tethyan realm (~20 to 30°N) suggest that this realm has been more sensitive to changes in hydrological cycling and subsequent erosion and runoff processes during the early to early–late Valanginian transition interval. This time interval, that is coincident with the pronounced positive and globally recognized carbon isotope excursion (CIE; the Weissert episode), documents the wet conditions of a humid subtropical climate belt. Temperature ranges derived from δ18O records suggest climate warming by about 3–5±0.9°C in the northern hemisphere, during the Weissert episode. This is followed by a global cooling of about ca. 1–5±0.9°C in both hemispheres, during the late Valanginian.We postulate that these patterns were due to interplays between tectonic and orbital factors, which have controlled the distribution of regional palaeoclimate belts during the Valanginian. The semi-arid belt expressed in the Proto North Atlantic realm has probably been induced by its specific palaeogeographic configuration and the existence of isolated basins, which were each characterized by strong and continuous thermohaline circulation. An eccentricity paced ... Article in Journal/Newspaper North Atlantic Archives ouvertes de Paris-Saclay Earth-Science Reviews 202 103092 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
hydrolysing conditions temperature range palaeoclimate belt volcanic activity global61 reconstruction Valanginian [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
hydrolysing conditions temperature range palaeoclimate belt volcanic activity global61 reconstruction Valanginian [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Charbonnier, Guillaume Duchamp-Alphonse, Stéphanie Deconinck, Jean-François Adatte, Thierry Spangenberg, Jorge Colin, Christophe Föllmi, Karl A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
topic_facet |
hydrolysing conditions temperature range palaeoclimate belt volcanic activity global61 reconstruction Valanginian [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience High-resolution clay mineral and δ18Ocarb analyses have been performed on three sections of Valanginian age (Early Cretaceous), from northwestern (~20–30°N) and southern (~53°S) Tethyan realms. The data have been integrated in a large set of published mineralogical (clays), and geochemical (δ18Ocarb, δ18Obivalve, δ18Olenticulina, δ18Obelemnite, and TEX86) data from 17 sections, situated between ~45°N and ~53°S. Based on this data set, we provide new insights into Valanginian climate conditions from a wide range of palaeolatitudes. We highlight climate trends within specific areas and identify main climate belts. In the Proto-North Atlantic realm (~15–17°N) large amounts of smectite together with the occurrence of palygorskite testify for a semi-arid climate belt throughout the Valanginian. Significant variations in kaolinite content in the northwestern Tethyan realm (~20 to 30°N) suggest that this realm has been more sensitive to changes in hydrological cycling and subsequent erosion and runoff processes during the early to early–late Valanginian transition interval. This time interval, that is coincident with the pronounced positive and globally recognized carbon isotope excursion (CIE; the Weissert episode), documents the wet conditions of a humid subtropical climate belt. Temperature ranges derived from δ18O records suggest climate warming by about 3–5±0.9°C in the northern hemisphere, during the Weissert episode. This is followed by a global cooling of about ca. 1–5±0.9°C in both hemispheres, during the late Valanginian.We postulate that these patterns were due to interplays between tectonic and orbital factors, which have controlled the distribution of regional palaeoclimate belts during the Valanginian. The semi-arid belt expressed in the Proto North Atlantic realm has probably been induced by its specific palaeogeographic configuration and the existence of isolated basins, which were each characterized by strong and continuous thermohaline circulation. An eccentricity paced ... |
author2 |
Université de Lausanne = University of Lausanne (UNIL) Géosciences Paris Saclay (GEOPS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Institut des Dynamiques de la Surface Terrestre Lausanne (IDYST) We thank the Swiss National Science Foundation (project 200021_168994) and the University of Lausanne for financial and logistic supports. |
format |
Article in Journal/Newspaper |
author |
Charbonnier, Guillaume Duchamp-Alphonse, Stéphanie Deconinck, Jean-François Adatte, Thierry Spangenberg, Jorge Colin, Christophe Föllmi, Karl |
author_facet |
Charbonnier, Guillaume Duchamp-Alphonse, Stéphanie Deconinck, Jean-François Adatte, Thierry Spangenberg, Jorge Colin, Christophe Föllmi, Karl |
author_sort |
Charbonnier, Guillaume |
title |
A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
title_short |
A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
title_full |
A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
title_fullStr |
A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
title_full_unstemmed |
A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data |
title_sort |
global palaeoclimatic reconstruction for the valanginian based on clay mineralogical and geochemical data |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02448620 https://hal.science/hal-02448620/document https://hal.science/hal-02448620/file/1-s2.0-S0012825219306816-am.pdf https://doi.org/10.1016/j.earscirev.2020.103092 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0012-8252 Earth-Science Reviews https://hal.science/hal-02448620 Earth-Science Reviews, 2020, 202, pp.103092. ⟨10.1016/j.earscirev.2020.103092⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.earscirev.2020.103092 hal-02448620 https://hal.science/hal-02448620 https://hal.science/hal-02448620/document https://hal.science/hal-02448620/file/1-s2.0-S0012825219306816-am.pdf doi:10.1016/j.earscirev.2020.103092 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.earscirev.2020.103092 |
container_title |
Earth-Science Reviews |
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202 |
container_start_page |
103092 |
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