The Neogene evolution of the Ene and southern Ucayali basins of the Subandes has been controlled by two stacked thrust wedges that differ in terms of tectonic styles. The lower thrust wedge is formed by deep‐seated décollements within the basement related to thick‐skinned foreland structures inherited from an Early Carboniferous thrust system. Seismic reflection data show that this Paleozoic compressional system has been eroded and unconformably covered by Late Carboniferous clastic sediments. It generated an irregular Paleozoic sedimentary architecture controlling the Neogene thrust propagation. The upper thin‐skinned thrust wedge developed within this Paleozoic sedimentary series and constitutes the Subandean zone. Cross‐section balancing shows an along‐strike homogenous horizontal shortening of ∼56 km (∼30%) across the Ene−southern Ucayali thrust system. This amount of shortening was vertically partitioned onto the two stacked thrust wedges. The N‐S thickness variations of the Paleozoic sedimentary prism controlled the eastward propagation of the upper thrust wedge. The southern thickening of the Paleozoic series generated major décollements and the shortening excess is of 7 km (16%) in comparison to the north. Consequently, the northern lack of shortening onto the upper thrust wedge was transferred to the Early Carboniferous compressional structures of the lower thrust wedge. We suggest that this vertical partitioning of the shortening was accommodated by a regional oblique ramp: the Tambo transfer zone. This geometrical analysis of the Ene−southern Ucayali thrust system provides new perspectives for future hydrocarbon exploration in this region.

A tectono-sedimentological study of the Upper Visean–Lower Westphalian Fourhal basin (northwestern Moroccan Meseta) has shown that deposition and depocentre migration were controlled by the north-westward propagation of thrust-related folds in the wedge-top depozone of a flexural foreland basin system. These results and a comparison of the ages of regional contraction in the Moroccan Meseta and the French Massif Central favour the interpretation of the Moroccan Meseta as a southern continuation of the south-European Variscan belt.

Other| July 01, 1995 Evolution tectono-sedimentaire du versant nord des Pyrenees centre-orientales au Paleocene et a l'Eocene inferieur Yvette Tambareau; Yvette Tambareau Author Institut des Sciences de la Terre, Lab. Geologie structurale & Tectonophysique, Toulouse, France Search for other works by this author on: GSW Google Scholar Bernard Crochet; Bernard Crochet Author Search for other works by this author on: GSW Google Scholar Juliette Villatte; Juliette Villatte Author Search for other works by this author on: GSW Google Scholar Joachim Deramond Joachim Deramond Author Search for other works by this author on: GSW Google Scholar Author and Article Information Yvette Tambareau Author Institut des Sciences de la Terre, Lab. Geologie structurale & Tectonophysique, Toulouse, France Bernard Crochet Author Juliette Villatte Author Joachim Deramond Author Publisher: Société Géologique de France First Online: 07 Mar 2017 Online Issn: 1777-5817 Print Issn: 0037-9409 GeoRef, Copyright 2012, American Geosciences Institute. Bulletin de la Société Géologique de France (1995) 166 (4): 375–387. https://doi.org/10.2113/gssgfbull.166.4.375 Article history First Online: 07 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Yvette Tambareau, Bernard Crochet, Juliette Villatte, Joachim Deramond; Evolution tectono-sedimentaire du versant nord des Pyrenees centre-orientales au Paleocene et a l'Eocene inferieur. Bulletin de la Société Géologique de France 1995;; 166 (4): 375–387. doi: https://doi.org/10.2113/gssgfbull.166.4.375 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin de la Société Géologique de France Search Advanced Search This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Abstract A new method of chronological and geometrical analysis is used for understanding the sedimentary and tectonic evolution of perisutural basins (foredeep and foreland basins). It may be applied to synorogenic basins whose infilling was controlled by sea-level fluctuations and where, as a result, the tectonic structures are well preserved. This method is based on the mapping of depositional sequence boundaries and maximum flooding surfaces defined by sequence stratigraphy. These planar markers are considered as synchronous and their numerical ages are determined by classical chronostratigraphic methods, by dating and by comparison with the eustatic global cycle chart. The evolution of the studied perisutural basins is controlled by the propagation in space and time of a syn-depositional thrust-and-fold system including a fault-propagation anticline and two synclines (a foreland and a hinterland syncline) over and in front of a blind basal sole thrust. The propagation of this thrust-and-fold system toward the foreland is connected to unconformable depositional sequence sets, which indicate for each system a time span for thrusting of several eustatic cycles. The evolution of a single thrust-and-fold system corresponds to a shortening accommodated by upward imbrication of second-order thrusts inside the anticline. Each of these thrusts is related, at least, to one depositional sequence lying unconformably on the external side of the fold and deformed by the successive development of the branch lines toward the hinterland. This tectono-sedimentary correlation indicates a time span sometimes as short as one eustatic cycle for each second-order thrust. Thrusting and sea-level changes are not exactly synchronous, as the depositional sequence sets (which are tectonic in origin) do not systematically correlate with eustatic supercycles. The apparent time correlation between the two groups of independent phenomena is an artefact of the method which calibrates the tectonic evolution by comparison with eustatic fluctuations. Applied to the South Central Pyrenees, the method has specified the structure of the Late Cretaceous foredeep basin and has revealed the successive stages of forward thrust-and-fold system migration (4 to 5 Ma for each one from 89 Ma) and of hindward second-order thrust migration (1 to 4 Ma for each one). In the North Central Pyrenees as in the South Central Pyrenees, Late Cretaceous foredeeps are characterized by syntectonic turbidite deposits (from 89 Ma onward) and by a significant shortening due to a symmetrical and synchronous structural evolution. The Eocene foreland is a foreland syncline developed in the footwall of the North Pyrenean Thrust. This syncline is due to the occurrence of blind thrusts and it is infilled by fluvial deposits.

Other| January 01, 1986 Evolution structurale des ensembles metamorphiques des gneiss et des granitoides dans les Pyrenees centrales Jean-Claude Soula; Jean-Claude Soula Author Univ. P. Sabatier, lab. geol. structurale, Toulouse 31400, France Search for other works by this author on: GSW Google Scholar Pierre Debat; Pierre Debat Author Search for other works by this author on: GSW Google Scholar Joachim Deramond; Joachim Deramond Author Search for other works by this author on: GSW Google Scholar Jean-Yves Guchereau; Jean-Yves Guchereau Author Search for other works by this author on: GSW Google Scholar Christian Lamouroux; Christian Lamouroux Author Search for other works by this author on: GSW Google Scholar Patrick Pouget; Patrick Pouget Author Search for other works by this author on: GSW Google Scholar Louis Roux Louis Roux Author Search for other works by this author on: GSW Google Scholar Author and Article Information Jean-Claude Soula Author Univ. P. Sabatier, lab. geol. structurale, Toulouse 31400, France Pierre Debat Author Joachim Deramond Author Jean-Yves Guchereau Author Christian Lamouroux Author Patrick Pouget Author Louis Roux Author Publisher: Société Géologique de France First Online: 07 Mar 2017 Online Issn: 1777-5817 Print Issn: 0037-9409 GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique, Vandoeuvre-les-Nancy, France Bulletin de la Société Géologique de France (1986) II (1): 79–93. https://doi.org/10.2113/gssgfbull.II.1.79 Article history First Online: 07 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jean-Claude Soula, Pierre Debat, Joachim Deramond, Jean-Yves Guchereau, Christian Lamouroux, Patrick Pouget, Louis Roux; Evolution structurale des ensembles metamorphiques des gneiss et des granitoides dans les Pyrenees centrales. Bulletin de la Société Géologique de France 1986;; II (1): 79–93. doi: https://doi.org/10.2113/gssgfbull.II.1.79 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin de la Société Géologique de France Search Advanced Search This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

La nappe de Gavarnie est constituée de terrains d'âge paléozoÏque, crétacé supérieur et éocène. Elle repose sur un ensemble autochtone constitué par des formations métamorphiques (migmatites, micaschistes) et leur couverture crétacée. La mise en place de la nappe s'est faite lors de l'orogenèse pyrénéenne. La géométrie des diverses déformations qui affectent cet ensemble complexe est envisagée. La chronologie de ces déformations est établie ainsi que la distinction entre les déformations pyrénéennes et varisques. On compare ensuite cette nappe avec d'autres structures chevauchantes particulièrement étudiées du point de vue mécanique.

Other| January 01, 1976 Methode informatique pour la determination du taux de deformation; applications Joachim Deramond; Joachim Deramond Author Universite Paul Sabatier, Laboratoire de Geologie-Petrologie, Toulouse, France Search for other works by this author on: GSW Google Scholar Daniel Litaize Daniel Litaize Author Search for other works by this author on: GSW Google Scholar Author and Article Information Joachim Deramond Author Universite Paul Sabatier, Laboratoire de Geologie-Petrologie, Toulouse, France Daniel Litaize Author Publisher: Société Géologique de France First Online: 03 Mar 2017 Online Issn: 1777-5817 Print Issn: 0037-9409 GeoRef, Copyright 2013, American Geosciences Institute. Bulletin de la Société Géologique de France (1976) S7-XVIII (6): 1423–1433. https://doi.org/10.2113/gssgfbull.S7-XVIII.6.1423 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Joachim Deramond, Daniel Litaize; Methode informatique pour la determination du taux de deformation; applications. Bulletin de la Société Géologique de France 1976;; S7-XVIII (6): 1423–1433. doi: https://doi.org/10.2113/gssgfbull.S7-XVIII.6.1423 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin de la Société Géologique de France Search Advanced Search This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.