Crustal structure of the Iberian Central System and adjacent basins

  1. Juvenal Andrés Cabrera 1
  2. P. Ayarza 2
  3. M. Schimmel 1
  4. D. Draganov 3
  5. I. Palomeras 2
  6. M. Ruiz 1
  7. Ramón Carbonell 1
  1. 1 Institute of Earth Science Jaume Almera (ICTJA)
  2. 2 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

  3. 3 Delft University of Technology
    info

    Delft University of Technology

    Delft, Holanda

    ROR https://ror.org/02e2c7k09

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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 524-527

Type: Article

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More publications in: Geotemas (Madrid)

Abstract

The crustal structure of the Iberian Central System has been studied using passive seismic techniques. We have applied seismic interferometry to a passive dataset through two techniques to generate a lithospheric-scale cross-section of the orogen. The resulting images constrain the structure of the crust below the mountain range and that of its surroun- ding sedimentary basins. Both techniques provide complementary results. The resulting images reveal that the crust–mantle boundary is relatively flat, with arrival times of approximately 10 s two-way travel time except in the Central System, where reflectors are located at 12 s two-way travel time. This indicates a clear thickening of the crust below the core of the orogen, resulting, most probably, from an imbrication of the crust. The boundary between the upper and lower crust is found at 5 s two-way travel and it is also slightly deeper below the mountain range.

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