Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications
The Latest Cretaceous/Paleocene paleokarsts from Bas-Languedoc (South of France) are characterized by : 1) exokarstic paleosurfaces (sink holes, pinnacles, canyons) which are mostly superimposed onto the Late Jurassic limestones and partly filled up with breccias and sandy clays containing Paleocene...
Published in: | Geodinamica Acta |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2007
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Online Access: | https://hal.science/hal-00407601 https://doi.org/10.3166/ga.20.301-326 |
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ftmeteofrance:oai:HAL:hal-00407601v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Météo-France: HAL |
op_collection_id |
ftmeteofrance |
language |
English |
topic |
paleokarst breccia latest cretaceous/palaeocene tectonics eustacy hydrogeology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
paleokarst breccia latest cretaceous/palaeocene tectonics eustacy hydrogeology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Combes, P. J. Peybernes, Bernard Fondecave-Wallez, M. J. Seranne, Michel Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
topic_facet |
paleokarst breccia latest cretaceous/palaeocene tectonics eustacy hydrogeology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
The Latest Cretaceous/Paleocene paleokarsts from Bas-Languedoc (South of France) are characterized by : 1) exokarstic paleosurfaces (sink holes, pinnacles, canyons) which are mostly superimposed onto the Late Jurassic limestones and partly filled up with breccias and sandy clays containing Paleocene planktonic foraminifera; 2) endokarstic cavities filled up by sandy pelites and laminated mudstones with similar micropaleontological assemblage. All these cavities constitute three cut-and-filled paleokarstic systems. A general model of formation for this polyphase system is proposed. These paleosurfaces are generated by a Latest Cretaceous tectonic phase and Paleocene movements associated with eustatic rises inducing rapid floodings. During Upper Danian-Lower Selandian times three successive base levels drops, whose cumulated duration could be as long as 3 Ma, have induced several hundred metres of incisions within the exposed Jurassic carbonate series. A paleogeographic reconstruction shows three main marine gulfs which extend towards NE the EW Pyrenean thrust belt ("Pyrenean Paleocene Trough", PPT) located on the axis of the future Pyrenees. The similarity of the facies and micropaleontological content in the two domains suggests connexions between the marine Paleocene deposits of Bas-Languedoc and the PPT. It could thus explain the succession of the same tectono-eustatic events. We propose, as an hypothesis, that the rapid sea-level changes, as recorded by the imbricated karstic paleomorphologies, could be induced by the closing and the opening of a strait in the Eastern part of the PPT acting as a sill. This would be controlled by tectonic movements along the active orogenic axis of the Pyrenean Range and eustatic variations of the Paleocene World Ocean. The karstic systems developed during these low-stand episodes may have been later reactivated after the Early Selandian and more specifically during the Messinian desiccation event. This late evolution may have generated deep flooded karsts, now situated below ... |
author2 |
Géosciences Montpellier Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Mécanismes et Transfert en Géologie (LMTG) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Combes, P. J. Peybernes, Bernard Fondecave-Wallez, M. J. Seranne, Michel |
author_facet |
Combes, P. J. Peybernes, Bernard Fondecave-Wallez, M. J. Seranne, Michel |
author_sort |
Combes, P. J. |
title |
Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
title_short |
Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
title_full |
Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
title_fullStr |
Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
title_full_unstemmed |
Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications |
title_sort |
latest-cretaceous/palaeocene karsts with marine infillings from languedoc (south of france), palaeogeographic, hydrogeologic and geodynamic implications |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00407601 https://doi.org/10.3166/ga.20.301-326 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 0985-3111 Geodinamica Acta https://hal.science/hal-00407601 Geodinamica Acta, 2007, 20 (5), pp.301-326. ⟨10.3166/ga.20.301-326⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3166/ga.20.301-326 hal-00407601 https://hal.science/hal-00407601 doi:10.3166/ga.20.301-326 |
op_doi |
https://doi.org/10.3166/ga.20.301-326 |
container_title |
Geodinamica Acta |
container_volume |
20 |
container_issue |
5 |
container_start_page |
301 |
op_container_end_page |
326 |
_version_ |
1785573349230903296 |
spelling |
ftmeteofrance:oai:HAL:hal-00407601v1 2023-12-17T10:49:01+01:00 Latest-cretaceous/palaeocene karsts with marine infillings from Languedoc (South of France), palaeogeographic, hydrogeologic and geodynamic implications Combes, P. J. Peybernes, Bernard Fondecave-Wallez, M. J. Seranne, Michel Géosciences Montpellier Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Mécanismes et Transfert en Géologie (LMTG) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal.science/hal-00407601 https://doi.org/10.3166/ga.20.301-326 en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.3166/ga.20.301-326 hal-00407601 https://hal.science/hal-00407601 doi:10.3166/ga.20.301-326 ISSN: 0985-3111 Geodinamica Acta https://hal.science/hal-00407601 Geodinamica Acta, 2007, 20 (5), pp.301-326. ⟨10.3166/ga.20.301-326⟩ paleokarst breccia latest cretaceous/palaeocene tectonics eustacy hydrogeology [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2007 ftmeteofrance https://doi.org/10.3166/ga.20.301-326 2023-11-21T23:39:34Z The Latest Cretaceous/Paleocene paleokarsts from Bas-Languedoc (South of France) are characterized by : 1) exokarstic paleosurfaces (sink holes, pinnacles, canyons) which are mostly superimposed onto the Late Jurassic limestones and partly filled up with breccias and sandy clays containing Paleocene planktonic foraminifera; 2) endokarstic cavities filled up by sandy pelites and laminated mudstones with similar micropaleontological assemblage. All these cavities constitute three cut-and-filled paleokarstic systems. A general model of formation for this polyphase system is proposed. These paleosurfaces are generated by a Latest Cretaceous tectonic phase and Paleocene movements associated with eustatic rises inducing rapid floodings. During Upper Danian-Lower Selandian times three successive base levels drops, whose cumulated duration could be as long as 3 Ma, have induced several hundred metres of incisions within the exposed Jurassic carbonate series. A paleogeographic reconstruction shows three main marine gulfs which extend towards NE the EW Pyrenean thrust belt ("Pyrenean Paleocene Trough", PPT) located on the axis of the future Pyrenees. The similarity of the facies and micropaleontological content in the two domains suggests connexions between the marine Paleocene deposits of Bas-Languedoc and the PPT. It could thus explain the succession of the same tectono-eustatic events. We propose, as an hypothesis, that the rapid sea-level changes, as recorded by the imbricated karstic paleomorphologies, could be induced by the closing and the opening of a strait in the Eastern part of the PPT acting as a sill. This would be controlled by tectonic movements along the active orogenic axis of the Pyrenean Range and eustatic variations of the Paleocene World Ocean. The karstic systems developed during these low-stand episodes may have been later reactivated after the Early Selandian and more specifically during the Messinian desiccation event. This late evolution may have generated deep flooded karsts, now situated below ... Article in Journal/Newspaper Planktonic foraminifera Météo-France: HAL Geodinamica Acta 20 5 301 326 |