%0 Conference Proceedings %T From the highest (Dent-Blanche klippe)to the deepest unit (Money window) : A kinematicmodel of the Western Alps %+ Terre, Temps, Traçage %+ Terre, Temps, Traçage %+ Institute of Geological Sciences [Bern] %A Ballevre, Michel %A Manzotti, Paola %A Engi, Martin %< avec comité de lecture %B 24 ème Réunion des sciences de la Terre 2014 %C Pau, France %3 24 ème Réunion des sciences de la terre 2014. Livre des résumés %P 191 %8 2014-10-27 %D 2014 %Z Sciences of the Universe [physics]/Earth SciencesConference papers %X The nappe stack of the Western Alps offers us a unique opportunityto discuss orogenic processes at crustal scale. Along and north of theECORS-CROP seismic line, the nappe stack consists, from top to bottom,of (i) units derived from the Sesia-Dent Blanche continental fragment,(ii) ocean-derived units (Zermatt-Grivola, Tsaté), (iii) units derivedfrom the distal part of the Briançonnais palaeomargin (Monte Rosa- Gran Paradiso), and (iv) units derived from more proximal part of thispalaeomargin, now outcropping as windows (Money Unit).We have recentlyperformed detailed mapping, structural analysis, metamorphicpetrology and geochronology in both the highest (Dent Blanche) andthe deepest (Money) units. As a synthesis, we will now discuss the metamorphicstructure of the nappe stack, which is characterized by thefollowing points :– Units involved in the subduction zone at an early stage are thrustedover units involved in the same subduction zone at a later stage, explainingwhy older eclogite-facies units (e.g. Zermatt-Grivola) arethrust on top of younger eclogite-facies (Monte Rosa- Gran Paradiso)units.– After their subduction as more or less coherent pieces, some continentalunits are sheared during their exhumation, so that higherpressuresubunits (Gran Paradiso) are thrusted over lower pressureones (Money).– The older nappe boundaries that occur at higher structural levelsare deformed (folded and sheared) when the younger nappe boundariesare formed at deeper structural levels.– Late brittle faulting (with up to 3km of vertical displacement) isa necessary requisite for understanding the present location of thenappe boundaries.Geometric and petrologic data are used to construct a consistent kinematicmodel for this transect of the Western Alps, emphasizing the roleof the inherited discontinuities from the pre-orogenic history, namelythe Variscan orogeny, the Permian extension and the Jurassic rifting. %G English %L insu-01080776 %U https://insu.hal.science/insu-01080776 %~ INSU %~ UNIV-RENNES1 %~ UR2-HB %~ CNRS %~ GR %~ OSUR %~ UR1-HAL %~ UR1-SDLM %~ UR1-SDLMJONCH %~ GR-3T %~ UNIV-RENNES2 %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INRAE %~ UR1-ENV %~ GR-CHRONOS