Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco)
The icehouse period during the lower Palaeozoic led to the development of large continental ice-sheet over the Gondwana. This ice-sheet fluctuated in size and repeatedly recovered the north-Gondwana platform. The resulting glacial record includes major erosional surfaces of regional extent, with sub...
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ftunivbourgogne:oai:HAL:tel-00837691v1 2024-01-07T09:43:59+01:00 Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) Modèles de dépôt sous-glaciaires et dynamique de remplissage des vallées tunnel : exemple au Quaternaire (Bray, Irlande) et application à l'Ordovicien supérieur de l'Anti-Atlas (Alnif, Maroc) Clerc, Sylvain Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Université de Bourgogne Michel Guiraud 2012-10-26 https://theses.hal.science/tel-00837691 https://theses.hal.science/tel-00837691/document https://theses.hal.science/tel-00837691/file/these_A_CLERC_Sylvain_2012.pdf fr fre HAL CCSD NNT: 2012DIJOS041 tel-00837691 https://theses.hal.science/tel-00837691 https://theses.hal.science/tel-00837691/document https://theses.hal.science/tel-00837691/file/these_A_CLERC_Sylvain_2012.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00837691 Sciences de la Terre. Université de Bourgogne, 2012. Français. ⟨NNT : 2012DIJOS041⟩ No english keyword Ordovicien Glaciaire Vallée tunnel Irlande Quaternaire Sous-glaciaire Proglaciaire Environnement Faciès Déformation Pression fluide [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2012 ftunivbourgogne 2023-12-12T23:36:59Z The icehouse period during the lower Palaeozoic led to the development of large continental ice-sheet over the Gondwana. This ice-sheet fluctuated in size and repeatedly recovered the north-Gondwana platform. The resulting glacial record includes major erosional surfaces of regional extent, with subglacial landforms and morphologies, as well as glacial valleys and specific glaciogenic sedimentary record. Among these valleys, tunnel valleys refer to Quaternary analogues, associated with the development of ice-sheets over Europe and North-America. Tunnel valley defines elongated, linear to slightly sinuous depressions, measuring few kilometers in width and several kilometres in length. They start and terminate abruptly, are generally a few hundred of meters deep, and display frequent overdeepening along the floor. Ordovician tunnel valleys are described from North Africa to the Middle East. Ordovician glacial deposits are considered as a major target for hydrocarbon exploration in these regions, with tunnel valleys forming lithological heterogeneities with excellent reservoir properties. In Europe, Quaternary tunnel valleys are targeted for groundwater resources as they form reliable aquifers. A major interest therefore exists for these valleys, as well as a need for better understanding of the nature and the stratigraphy of the infill, their origin and the parameters controlling their distribution. The recherché project presented in this thesis is based on an extensive fieldwork that focused on three main issues, regarding tunnel valleys: (1) the subglacial environment, (2) the sedimentary processes and depositional environments associated with their infill and (3) the parameters controlling their distribution Au cours du Paléozoïque inférieur, un changement climatique majeur a permis le développement d’une calotte glaciaire sur paléocontinent Gondwana. Cette calotte a plusieurs fois recouvert la plateforme nord-gondwanienne au cours des différents épisodes d’avancée et de recul des fronts glaciaires. Cette ... Doctoral or Postdoctoral Thesis Ice Sheet Université de Bourgogne (UB): HAL Bray ENVELOPE(-114.067,-114.067,-74.833,-74.833) |
institution |
Open Polar |
collection |
Université de Bourgogne (UB): HAL |
op_collection_id |
ftunivbourgogne |
language |
French |
topic |
No english keyword Ordovicien Glaciaire Vallée tunnel Irlande Quaternaire Sous-glaciaire Proglaciaire Environnement Faciès Déformation Pression fluide [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
No english keyword Ordovicien Glaciaire Vallée tunnel Irlande Quaternaire Sous-glaciaire Proglaciaire Environnement Faciès Déformation Pression fluide [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Clerc, Sylvain Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
topic_facet |
No english keyword Ordovicien Glaciaire Vallée tunnel Irlande Quaternaire Sous-glaciaire Proglaciaire Environnement Faciès Déformation Pression fluide [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
The icehouse period during the lower Palaeozoic led to the development of large continental ice-sheet over the Gondwana. This ice-sheet fluctuated in size and repeatedly recovered the north-Gondwana platform. The resulting glacial record includes major erosional surfaces of regional extent, with subglacial landforms and morphologies, as well as glacial valleys and specific glaciogenic sedimentary record. Among these valleys, tunnel valleys refer to Quaternary analogues, associated with the development of ice-sheets over Europe and North-America. Tunnel valley defines elongated, linear to slightly sinuous depressions, measuring few kilometers in width and several kilometres in length. They start and terminate abruptly, are generally a few hundred of meters deep, and display frequent overdeepening along the floor. Ordovician tunnel valleys are described from North Africa to the Middle East. Ordovician glacial deposits are considered as a major target for hydrocarbon exploration in these regions, with tunnel valleys forming lithological heterogeneities with excellent reservoir properties. In Europe, Quaternary tunnel valleys are targeted for groundwater resources as they form reliable aquifers. A major interest therefore exists for these valleys, as well as a need for better understanding of the nature and the stratigraphy of the infill, their origin and the parameters controlling their distribution. The recherché project presented in this thesis is based on an extensive fieldwork that focused on three main issues, regarding tunnel valleys: (1) the subglacial environment, (2) the sedimentary processes and depositional environments associated with their infill and (3) the parameters controlling their distribution Au cours du Paléozoïque inférieur, un changement climatique majeur a permis le développement d’une calotte glaciaire sur paléocontinent Gondwana. Cette calotte a plusieurs fois recouvert la plateforme nord-gondwanienne au cours des différents épisodes d’avancée et de recul des fronts glaciaires. Cette ... |
author2 |
Biogéosciences UMR 6282 (BGS) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Université de Bourgogne Michel Guiraud |
format |
Doctoral or Postdoctoral Thesis |
author |
Clerc, Sylvain |
author_facet |
Clerc, Sylvain |
author_sort |
Clerc, Sylvain |
title |
Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
title_short |
Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
title_full |
Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
title_fullStr |
Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
title_full_unstemmed |
Subglacial depositional models and tunnel valley infill : example in the Quaternary record (Bray, Ireland) and application to the Upper Ordovicien record in the anti-Atlas (Alnif, Morocco) |
title_sort |
subglacial depositional models and tunnel valley infill : example in the quaternary record (bray, ireland) and application to the upper ordovicien record in the anti-atlas (alnif, morocco) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://theses.hal.science/tel-00837691 https://theses.hal.science/tel-00837691/document https://theses.hal.science/tel-00837691/file/these_A_CLERC_Sylvain_2012.pdf |
long_lat |
ENVELOPE(-114.067,-114.067,-74.833,-74.833) |
geographic |
Bray |
geographic_facet |
Bray |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
https://theses.hal.science/tel-00837691 Sciences de la Terre. Université de Bourgogne, 2012. Français. ⟨NNT : 2012DIJOS041⟩ |
op_relation |
NNT: 2012DIJOS041 tel-00837691 https://theses.hal.science/tel-00837691 https://theses.hal.science/tel-00837691/document https://theses.hal.science/tel-00837691/file/these_A_CLERC_Sylvain_2012.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1787425280783024128 |