Evidencias termocronológicas de la exhumación tectónica Eocena-Oligocena de la Cordillera Cantábricanuevos datos de huellas de fisión en apatitos y (UTh)/He en circones

  1. Charlotte Fillon 1
  2. D. Pedreira 2
  3. L. Barbero 3
  4. C. Gautheron 4
  5. P. Van der Beek 1
  6. J.A. Pulgar 2
  7. A. Cuesta 2
  1. 1 ISTERRE, University Joseph Fourier
  2. 2 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

  3. 3 Universidad de Cádiz
    info

    Universidad de Cádiz

    Cádiz, España

    ROR https://ror.org/04mxxkb11

  4. 4 UMR Interactions et Dynamique des Environnements de Surface-CNRS
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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2012

Issue Title: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Issue: 13

Pages: 1642-1645

Type: Article

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More publications in: Geotemas (Madrid)

Abstract

The Cantabrian Mountains are located in the north of the Iberian Peninsula and were uplifted as a consequence to the convergence between the Iberian and European plates during the Alpine orogeny. The creation of the relief in the Asturian, central part of the chain, is primarily the result of the tectonic uplift of the old Variscan basement along a deep thrust inclined to the north, the age of which is not known with precision due to the scarcity of fossils suitable for dating in the syntectonic sediments of the Duero foreland basin, of continental nature. A thermochronology study was carried out in this sector of the Cantabrian Mountains, providing new data about the age, amount and rate of this alpine tectonic uplift. The area showing the highest exhumation shows (U-Th)/He ages in zircons of 37-39 Myr (age of cooling below ~180 ºC), and apatite fission track ages of 28-29 Myr (age of cooling below ~110 ºC). Assuming a stationary geothermal gradient of 25 ºC/km, a minimum amount of eroded material of ~8 km and an uplift rate of 0.24 mm/yr are deduced for the period between the Bartonian and the Rupelian.

Data source: Dialnet