Estructura Litosférica bajo la transecta sísmica pasiva TransCorBe (Béticas Orientales) utilizando Funciones Receptoras de ondas P

  1. J. Morales 1
  2. F. Mancilla 1
  3. D. Stich 1
  4. A. Molina-Aguilera 1
  5. J.M. Azañón 1
  6. T. Teixido 1
  7. J.A. López-Comino 1
  8. B. Heit 2
  9. X. Yuan 2
  1. 1 Instituto Andaluz de Geofísica, Universidad de Granada
  2. 2 Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    info

    Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

    Potsdam, Alemania

    ROR https://ror.org/04z8jg394

Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 551

Type: Article

DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Geotemas (Madrid)

Abstract

We obtain P-wave receiver functions from teleseismic recordings at a dense seismic broadband transect (TransCorBe), deployed along 170 km across the Betic range in southeastern Spain. Migrated images show the deep structure of the orogen in detail. In particular, they reveal the situation of the subducted Iberian paleomargin, with full preservation of the proximal domain and the ~50 km wide necking domain. Crustal thinning affects the lower continental crust. The Variscan crust of the Tethys margin is bending downward beneath the Betics, reaching ~45 km depth, and terminates abruptly at a major slab tear. The distal domain of the paleomargin cannot be reconstructed, but the migrated section suggests that material has been exhumed through the subduction channel and integrated into the Betic orogen. This supports an origin of the HP-LT Neva- do-Filabride units from subducted, hyperextended Variscan crust. According to our profile, the present-day eastern Betics appear to have a much more significant contribution from metamorphic Iberian crust than previously thought.

Data source: Dialnet