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<publisher>HAL CCSD</publisher>
<title lang=en>Tectono-thermal history of an exhumed thrust-sheet-top basin: an example from the south Pyrenean thrust belt</title>
<creator>Labaume, Pierre</creator>
<creator>Meresse, Florian</creator>
<creator>Jolivet, Marc</creator>
<creator>Teixell, Antonio</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>TOTAL-Scientific and Technical Center Jean Féger (CSTJF) ; Total</contributor>
<contributor>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)</contributor>
<contributor>Department of Geology ; Universitat Autònoma de Barcelona [Barcelona] (UAB)</contributor>
<contributor>Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)</contributor>
<description>International audience</description>
<source>ISSN: 0278-7407</source>
<source>Tectonics</source>
<publisher>American Geophysical Union (AGU)</publisher>
<identifier>insu-01312746</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01312746</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01312746/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01312746/file/Labaume_et_al-2016-Tectonics.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01312746</source>
<source>Tectonics, American Geophysical Union (AGU), 2016, 35 (5), pp.1280-1313 〈10.1002/2016TC004192〉</source>
<identifier>DOI : 10.1002/2016TC004192</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/2016TC004192</relation>
<language>en</language>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>This paper presents a new balanced structural cross-section of the Jaca thrust-sheet-top basin of the southern Pyrenees combined with paleo-thermometry and apatite fission track (AFT) thermochronology data. The cross-section, based on field data and interpretation of industrial seismic reflection profiles, allows refinement of previous interpretations of the south-directed thrust system, involving the identification of new thrust faults, and of the kinematic relationships between basement and cover thrusts from the middle Eocene to the early Miocene. AFT analysis shows a southward decrease in the level of fission track resetting, from totally reset Paleozoic rocks and lower Eocene turbidites (indicative of heating to Tmax > ~120 °C), to partially reset middle Eocene turbidites and no/very weak resetting in the upper Eocene-lower Oligocene molasse (Tmax < ~60 °C). AFT results indicate a late Oligocene-early Miocene cooling event throughout the Axial Zone and Jaca Basin. Paleo-maximum temperatures determined by vitrinite reflectance measurements and Raman spectroscopy of carbonaceous material reach up to ~240 °C at the base of the turbidite succession. Inverse modelling of AFT and vitrinite reflectance data with the QTQt software for key samples show compatibility between vitrinite-derived Tmax and the AFT reset level for most of the samples. However, they also suggest that the highest temperatures determined in the lowermost turbidites correspond to a thermal anomaly rather than burial heating, possibly due to fluid circulation during thrust activity. From these results, we propose a new sequential restoration of the south Pyrenean thrust system propagation and related basin evolution.</description>
<date>2016</date>
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