1. Tectonics of the Northern Bresse region (France) during the Alpine cycle
- Author
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Michel Guiraud, Francis Chevalier, Muriel Rocher, Christophe Petit, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), UFR Sciences de la Vie, de la Terre et de l'Environnement (Université de Bourgogne) (UFR SVTE), Université de Bourgogne (UB), Archéologies environnementales, Archéologies et Sciences de l'Antiquité (ArScAn), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Ministère de la Culture et de la Communication (MCC)-Institut national de recherches archéologiques préventives (Inrap)-Centre National de la Recherche Scientifique (CNRS)-Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris 8 Vincennes-Saint-Denis (UP8)-Université Paris Nanterre (UPN)-Ministère de la Culture et de la Communication (MCC)-Institut national de recherches archéologiques préventives (Inrap)-Centre National de la Recherche Scientifique (CNRS), ARSCAN_ARCHEO_ENV, Utilisateur générique, and Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris Nanterre (UPN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris Nanterre (UPN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
010504 meteorology & atmospheric sciences ,[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory ,Sketch map ,010502 geochemistry & geophysics ,01 natural sciences ,[SHS]Humanities and Social Sciences ,Paleontology ,Bresse graben ,Microtectonics ,Compression (geology) ,0105 earth and related environmental sciences ,Earth-Surface Processes ,[SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory ,Deformation (mechanics) ,Alpine orogenesis ,Graben ,Tectonics ,Geophysics ,Paleostresses ,Drainage ,[SHS] Humanities and Social Sciences ,Quaternary ,Cenozoic ,Geology ,Seismology ,Chronology - Abstract
International audience; Combining fieldwork and surface data, we have reconstructed the Cenozoic structural and tectonic evolution of the Northern Bresse. Analysis of drainage network geometry allowed to detect three major fault zones trending NE-SW, E-W and NW-SE, and smooth folds with NNE trending axes, all corroborated with shallow well data in the graben and fieldwork on edges. Cenozoic paleostress succession was determined through fault slip and calcite twin inversions, taking into account data of relative chronology. A N-S major compression, attributed to the Pyrenean orogenesis, has activated strike-slip faults trending NNE along the western edge and NE-SW in the graben. After a transitional minor E-W trending extension, the Oligocene WNW extension has structured the graben by a collapse along NNE to NE-SW normal faults. A local NNW extension closes this phase. The Alpine collision has led to an ENE compression at Early Miocene. The following WNW trending major compression has generated shallow deformation in Bresse, but no deformation along the western edge. The calculation of potential reactivation of pre-existing faults enables to propose a structural sketch map for this event, with a NE-SW trending transfer fault zone, inactivity of the NNE edge faults, and possibly large wavelength folding, which could explain the deposit agency and repartition of Miocene to Quaternary deformation.
- Published
- 2003