L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire
International audience By means of new datings and grade-datings founded on planktonic Foraminifera, ponctually identified in spite of a Campanian epimetamorphism, the extention of the Coniacian sub-basin of Lordat (« Zone des Écailles Bordières » , Ariège),partly calciturbiditic, is doubled indeed...
Published in: | Geodinamica Acta |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03642950 https://doi.org/10.1016/S0985-3111(01)01068-3 |
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ftccsdartic:oai:HAL:insu-03642950v1 2023-05-15T18:01:08+02:00 L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire 2001 https://hal-insu.archives-ouvertes.fr/insu-03642950 https://doi.org/10.1016/S0985-3111(01)01068-3 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/S0985-3111(01)01068-3 insu-03642950 https://hal-insu.archives-ouvertes.fr/insu-03642950 BIBCODE: 2001GeoAc.14.289P doi:10.1016/S0985-3111(01)01068-3 Geodinamica Acta https://hal-insu.archives-ouvertes.fr/insu-03642950 Geodinamica Acta, 2001, 14, pp.289-306. ⟨10.1016/S0985-3111(01)01068-3⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2001 ftccsdartic https://doi.org/10.1016/S0985-3111(01)01068-3 2022-06-25T23:55:13Z International audience By means of new datings and grade-datings founded on planktonic Foraminifera, ponctually identified in spite of a Campanian epimetamorphism, the extention of the Coniacian sub-basin of Lordat (« Zone des Écailles Bordières » , Ariège),partly calciturbiditic, is doubled indeed tripled at the expense of formations previously assigned to Paleozoic (particularly the ex-'Paleozoic slice of Lordat'). These last ones are only represented by very large size olistolites redeposited within a thick olistostrome (Lordat castle, Saint-Pierre hermitage), itself included within a monoclinal succession with calcareous intercalations, regarded as a probable equivalent of the 'Fucoïd flysch'. This épimetamorphic series also exists, more to the North, beyond the marbles of the Internal Metamorphic Zone, as it is evidenced by the Upper Cretaceous age assigned to the ex-Paleozoic slice of Carmilles directly overthrust by the North-pyrenean hercynian massif of Saint-Barthelemy. More to the West, the Vicdessos sub-basin is regarded as a lateral extension of the Lordat one it consists of a thick monoclinal Coniacian series and not of a large 'synclinorium' subdivided by Urgo-Aptian anticlines which correspond, in reality, to calcareous intercalations within the Upper Cretaceous normal succession. The herein studied terrigenous complex of Lordat-Vicdessos, partly turbiditic, is composed by, at least, two 3rd order tectono-sedimentary sequences, A and B, marking the successive infilling of foreland synsedimentary synclines supplied (olistolites) by the probably submarine erosion of the Northward migrating front of the High Primary Range (induced by successive synsedimentary probably blind overthrusts). This model of foreland sub-basin fits in perfectly with the evolutional sheme of an interplaque bivergent range, in compression during Upper Cretaceous, where followed along a N-S palinspastic section reconstructed during Coniacian, on the two sides of the future High Primary Range, at least two sub-basins linked ... Article in Journal/Newspaper Planktonic foraminifera Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Geodinamica Acta 14 5 289 306 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience By means of new datings and grade-datings founded on planktonic Foraminifera, ponctually identified in spite of a Campanian epimetamorphism, the extention of the Coniacian sub-basin of Lordat (« Zone des Écailles Bordières » , Ariège),partly calciturbiditic, is doubled indeed tripled at the expense of formations previously assigned to Paleozoic (particularly the ex-'Paleozoic slice of Lordat'). These last ones are only represented by very large size olistolites redeposited within a thick olistostrome (Lordat castle, Saint-Pierre hermitage), itself included within a monoclinal succession with calcareous intercalations, regarded as a probable equivalent of the 'Fucoïd flysch'. This épimetamorphic series also exists, more to the North, beyond the marbles of the Internal Metamorphic Zone, as it is evidenced by the Upper Cretaceous age assigned to the ex-Paleozoic slice of Carmilles directly overthrust by the North-pyrenean hercynian massif of Saint-Barthelemy. More to the West, the Vicdessos sub-basin is regarded as a lateral extension of the Lordat one it consists of a thick monoclinal Coniacian series and not of a large 'synclinorium' subdivided by Urgo-Aptian anticlines which correspond, in reality, to calcareous intercalations within the Upper Cretaceous normal succession. The herein studied terrigenous complex of Lordat-Vicdessos, partly turbiditic, is composed by, at least, two 3rd order tectono-sedimentary sequences, A and B, marking the successive infilling of foreland synsedimentary synclines supplied (olistolites) by the probably submarine erosion of the Northward migrating front of the High Primary Range (induced by successive synsedimentary probably blind overthrusts). This model of foreland sub-basin fits in perfectly with the evolutional sheme of an interplaque bivergent range, in compression during Upper Cretaceous, where followed along a N-S palinspastic section reconstructed during Coniacian, on the two sides of the future High Primary Range, at least two sub-basins linked ... |
format |
Article in Journal/Newspaper |
title |
L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
title_short |
L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
title_full |
L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
title_fullStr |
L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
title_full_unstemmed |
L'olistostrome coniacien de Lordat (Pyrénées ariégeoises) et son équivalent latéral de Vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la Haute Chaîne Primaire |
title_sort |
l'olistostrome coniacien de lordat (pyrénées ariégeoises) et son équivalent latéral de vicdessos, témoins d'un nouveau bassin d'avant-pays au front nord de la haute chaîne primaire |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03642950 https://doi.org/10.1016/S0985-3111(01)01068-3 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Geodinamica Acta https://hal-insu.archives-ouvertes.fr/insu-03642950 Geodinamica Acta, 2001, 14, pp.289-306. ⟨10.1016/S0985-3111(01)01068-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0985-3111(01)01068-3 insu-03642950 https://hal-insu.archives-ouvertes.fr/insu-03642950 BIBCODE: 2001GeoAc.14.289P doi:10.1016/S0985-3111(01)01068-3 |
op_doi |
https://doi.org/10.1016/S0985-3111(01)01068-3 |
container_title |
Geodinamica Acta |
container_volume |
14 |
container_issue |
5 |
container_start_page |
289 |
op_container_end_page |
306 |
_version_ |
1766170492819996672 |