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Andean deformation and rift inversion, eastern edge of Cordillera Oriental (Guateque-Medina area), Colombia.

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  • Additional Information
    • Contributors:
      Institut des Sciences de la Terre d'Orléans (ISTO); Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS); Centre de Recherches Pétrographiques et Géochimiques (CRPG); Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS); Géosciences Rennes (GR); Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre Armoricain de Recherches en Environnement-Centre National de la Recherche Scientifique (CNRS); Laboratoire des Mécanismes et Transfert en Géologie (LMTG); Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP); Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3); Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS); Ecole Nationale Supérieure des Mines de Nancy (ENSMN); Institut Mines-Télécom Paris (IMT)-Université de Lorraine (UL)
    • Publication Information:
      HAL CCSD
      Elsevier
    • Publication Date:
      2002
    • Collection:
      Université de Lorraine: HAL
    • Abstract:
      In the Guateque–Medina area, Paleozoic basement and Mesozoic rift basins have been uplifted and exhumed during the Andean orogeny (12 Ma to present). Surface exposures and subsurface data constrain the deformation style and the rift geometry. We have mapped a regional transect and restored a cross section. We have also reconciled existing stratigraphic data, from cordillera, foothills and foreland basin, and have added new data of our own. In Early Cretaceous shales, there is evidence for fault-controlled sedimentation. A brecciated evaporitic layer, which is locally emerald bearing, has acted as a regional detachment. The underlying basement, composed of Paleozoic sediments, crops out as the Quetame Massif. It was uplifted during the Andean orogeny on a series of high-angle reverse faults. The main SE-verging Tesalia fault has resulted from Andean reactivation of an Early Cretaceous normal fault, which bounded a half-rift. A series of NW-verging back-thrusts may have resulted from Andean reactivation of Paleozoic faults. Between the back-thrusts and the Tesalia fault is a basement pop-up. It may be part of a flower structure, because components of right-lateral slip have been identified. These are attributed to eastward subduction of the Nazca plate beneath South America. In general, the style and timing of Andean deformation in the Guateque–Medina area are compatible with the plate tectonic setting of the northern Andes.
    • Relation:
      hal-00076871; https://insu.hal.science/hal-00076871; https://insu.hal.science/hal-00076871/document; https://insu.hal.science/hal-00076871/file/Branquet-JSouthAmericanEarthSciences-2002.pdf; IRD: PAR00002996
    • Accession Number:
      10.1016/S0895-9811(02)00063-9
    • Online Access:
      https://doi.org/10.1016/S0895-9811(02)00063-9
      https://insu.hal.science/hal-00076871
      https://insu.hal.science/hal-00076871/document
      https://insu.hal.science/hal-00076871/file/Branquet-JSouthAmericanEarthSciences-2002.pdf
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.CC04491B