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<title lang=en>The south-Pyrenean thrust sequenceand thermal history in the eastern Jacabasin (W-central southern Pyrenees)</title>
<creator>Labaume, Pierre</creator>
<creator>Teixell, Antonio</creator>
<creator>Meresse, Florian</creator>
<creator>Jolivet, Marc</creator>
<creator>Lahfid, Abdeltif</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Department of Geology ; Universitat Autònoma de Barcelona [Barcelona] (UAB)</contributor>
<contributor>Terre, Temps, Traçage ; Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS) - Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)</contributor>
<description>International audience</description>
<source>24 ème Réunion des sciences de la Terre 2014</source>
<coverage>Pau, France</coverage>
<identifier>insu-01080836</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01080836</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01080836</source>
<source>24 ème Réunion des sciences de la Terre 2014, Oct 2014, Pau, France. pp.240-241, 2014, 24 ème Réunion des sciences de la terre 2014. Livre des résumés</source>
<language>en</language>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
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<type>Conference papers</type>
<description lang=en>The Jaca basin is a thrust-sheet top basin transported southward andunderlain by basement and cover thrusts separated by a Triassic décollement.Basin-fill upper Cretaceous to lower Oligocene synorogenic sequencesrecord a southward depocenter migration, while growth stratadate a shift of deformation from the mid-Eocene in the N to the earlyMiocene in the S (S-Pyrenean front). However, the deep geometry andkinematic relationships between the cover and basement thrusts remainnon-consensual. We present a new structural and kinematic interpretationfor the eastern Jaca basin, based on subsurface structural maps andcross-sections constructed using industrial seismic reflection profiles.Raman Spectroscopy of Carbonaceous Material (RSCM), vitrinite reflectanceand apatite fission track (AFT) thermochronology data givefurther constraints for the restoration of the deformation and burialexhumationsequence. We define 3 main basement thrusts under thenorthern part of the basin, from N to S the Broto, Fiscal and Guargathrusts. The study also clarifies the deep structure of the cover thrustsand their links with these basement thrusts and those located more tothe north in the Axial Zone (AZ), which altogether define the timing ofthe basement thrust sequence as follows : the Lakoura-Eaux Chaudesthrust system (northern AZ) active up to the end Bartonian, the Gavarnie(central AZ) and Broto thrusts during the Priabonian-Rupelian andthe Fiscal and Guarga thrusts during the late Oligocene-early Miocene.AFT results in the basin fill and AZ date the exhumation of the basinto the late Oligocene-early Miocene, in relation to the Fiscal-Guargathrusting. AFT partial reset argues for a maximum burial < 6 km forthe base of the Eocene detrital sequence (Hecho Group turbidites). Bycontrast, RSCM and vitrinite thermometry at the same level indicatesTmax around 180°C, locally up to 240°C, attesting to a temperature anomalypossibly related to transient fluid circulation.</description>
<date>2014-10-27</date>
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