Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees
International audience The Mesozoic series of the southern units of the Pyrenean Empordà thrust sheets (Montgrí and Figueres nappes, Catalonia, Spain) were finally emplaced over the autochthonous basement and its Cenozoic cover during Eocene times. However, they have originally been folded by the “L...
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ftutoulouse3hal:oai:HAL:hal-00325409v1 2024-09-15T18:30:58+00:00 Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees Spain) : relationships between tectonics and karstification Peybernès, Bernard Fondecave-Wallez, M.-J. Combes, Pierre-Jean Séranne, Michel Laboratoire Dynamique de la Lithosphère (LDL) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut national des sciences de l'Univers (INSU - CNRS)-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-00325409 https://doi.org/10.2113/gssgfbull.178.1.15 fr fre HAL CCSD Société géologique de France - EDP Sciences info:eu-repo/semantics/altIdentifier/doi/10.2113/gssgfbull.178.1.15 hal-00325409 https://hal.science/hal-00325409 doi:10.2113/gssgfbull.178.1.15 ISSN: 0037-9409 EISSN: 1777-5817 Bulletin de la Société Géologique de France https://hal.science/hal-00325409 Bulletin de la Société Géologique de France, 2007, 178 (1), pp.15-24. ⟨10.2113/gssgfbull.178.1.15⟩ Breccias Hemipelagites Paleocene/Eocene planktonic foraminifera Paleokarsts Catalan Pyrenees Spain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftutoulouse3hal https://doi.org/10.2113/gssgfbull.178.1.15 2024-06-25T00:12:59Z International audience The Mesozoic series of the southern units of the Pyrenean Empordà thrust sheets (Montgrí and Figueres nappes, Catalonia, Spain) were finally emplaced over the autochthonous basement and its Cenozoic cover during Eocene times. However, they have originally been folded by the “Laramian” compressional event (Late Cretaceous/Early Paleocene), while they were still in their root zone more than 50 km to the N-NE. Postdating the Santonian, the emersion of the Cretaceous tectorogen induced karst formation at the expense of Berriasian to Santonian limestone sequences. Karst cavities of this paleokarst 1 (lapiaz and canyons) were subsequently coated with a fine, red or black, Microcodium-bearing, continental silt, and infilled with marine chaotic breccias. Following a new episode of emersion then erosion, the original paleokarst 1 was cross-cut by newly formed cavities of the paleokarst 2, filled with Lutetian- Bartonian marine breccias. Both types of marine breccias (Paleocene then Eocene in age) are now relatively well dated by means of planktonic foraminifera (Globigerinacea) occurring within the argillaceous-sandy matrix, and for the older ones, within the argillaceous-sandy or carbonate, finely laminated, interbedded hemipelagites, that mark the top of marine sequences tens of centimetres thick. The relationships of the “Laramian” and “Pyrenean” compressional tectonic events, occurring from latest Cretaceous to Bartonian, with the development of paleokarsts 1 and 2 are analysed in the perspective of the progressive southwards emplacement of the Montgrí thrust sheet, during Eocene time. Article in Journal/Newspaper Planktonic foraminifera Université Toulouse III - Paul Sabatier: HAL-UPS Bulletin de la Société Géologique de France 178 1 15 24 |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
French |
topic |
Breccias Hemipelagites Paleocene/Eocene planktonic foraminifera Paleokarsts Catalan Pyrenees Spain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Breccias Hemipelagites Paleocene/Eocene planktonic foraminifera Paleokarsts Catalan Pyrenees Spain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Peybernès, Bernard Fondecave-Wallez, M.-J. Combes, Pierre-Jean Séranne, Michel Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
topic_facet |
Breccias Hemipelagites Paleocene/Eocene planktonic foraminifera Paleokarsts Catalan Pyrenees Spain [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Mesozoic series of the southern units of the Pyrenean Empordà thrust sheets (Montgrí and Figueres nappes, Catalonia, Spain) were finally emplaced over the autochthonous basement and its Cenozoic cover during Eocene times. However, they have originally been folded by the “Laramian” compressional event (Late Cretaceous/Early Paleocene), while they were still in their root zone more than 50 km to the N-NE. Postdating the Santonian, the emersion of the Cretaceous tectorogen induced karst formation at the expense of Berriasian to Santonian limestone sequences. Karst cavities of this paleokarst 1 (lapiaz and canyons) were subsequently coated with a fine, red or black, Microcodium-bearing, continental silt, and infilled with marine chaotic breccias. Following a new episode of emersion then erosion, the original paleokarst 1 was cross-cut by newly formed cavities of the paleokarst 2, filled with Lutetian- Bartonian marine breccias. Both types of marine breccias (Paleocene then Eocene in age) are now relatively well dated by means of planktonic foraminifera (Globigerinacea) occurring within the argillaceous-sandy matrix, and for the older ones, within the argillaceous-sandy or carbonate, finely laminated, interbedded hemipelagites, that mark the top of marine sequences tens of centimetres thick. The relationships of the “Laramian” and “Pyrenean” compressional tectonic events, occurring from latest Cretaceous to Bartonian, with the development of paleokarsts 1 and 2 are analysed in the perspective of the progressive southwards emplacement of the Montgrí thrust sheet, during Eocene time. |
author2 |
Laboratoire Dynamique de la Lithosphère (LDL) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut national des sciences de l'Univers (INSU - CNRS)-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 |
Peybernès, Bernard Fondecave-Wallez, M.-J. Combes, Pierre-Jean Séranne, Michel |
author_facet |
Peybernès, Bernard Fondecave-Wallez, M.-J. Combes, Pierre-Jean Séranne, Michel |
author_sort |
Peybernès, Bernard |
title |
Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
title_short |
Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
title_full |
Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
title_fullStr |
Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
title_full_unstemmed |
Successive Paleocene and Eocene infillings of polyphase paleokarsts within the Cretaceous limestones of the Emporda thrust sheets (Catalan Pyrenees |
title_sort |
successive paleocene and eocene infillings of polyphase paleokarsts within the cretaceous limestones of the emporda thrust sheets (catalan pyrenees |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00325409 https://doi.org/10.2113/gssgfbull.178.1.15 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 0037-9409 EISSN: 1777-5817 Bulletin de la Société Géologique de France https://hal.science/hal-00325409 Bulletin de la Société Géologique de France, 2007, 178 (1), pp.15-24. ⟨10.2113/gssgfbull.178.1.15⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2113/gssgfbull.178.1.15 hal-00325409 https://hal.science/hal-00325409 doi:10.2113/gssgfbull.178.1.15 |
op_doi |
https://doi.org/10.2113/gssgfbull.178.1.15 |
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Bulletin de la Société Géologique de France |
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178 |
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1 |
container_start_page |
15 |
op_container_end_page |
24 |
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1810472540680749056 |