Combinación de métodos de datación en cronologías paleosísmicasel ejemplo de El Saltador (Falla de Alhama de Murcia)

  1. M. Ortuño 1
  2. M. Ferrater 1
  3. E. Masana 1
  4. J.J. Martínez-Díaz 2
  5. R. Pallàs 1
  6. H. Perea 3
  7. S. Baize 4
  8. E. García-Meléndez 5
  9. T. Rockwell 6
  10. W.D. Sharp 7
  11. A. Medialdea 8
  12. E. Rhodes 8
  13. P.P. Cunha 9
  14. R. Sohbati 10
  15. J.P. Buylaert 10
  16. A. Murray 10
  1. 1 Univ. de Barcelona
  2. 2 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  3. 3 Barcelona Center for Subsurface Imaging (B-CSI), Dept.de Geociències Marines - Institut de Ciències del Mar - CSIC
  4. 4 Institut de Radioprotection et Sûreté Nucléaire - Seismic Hazard Division (BERSSIN)
  5. 5 Universidad de León
    info

    Universidad de León

    León, España

    ROR https://ror.org/02tzt0b78

  6. 6 San Diego State University
    info

    San Diego State University

    San Diego, Estados Unidos

    ROR https://ror.org/0264fdx42

  7. 7 Berkeley Geochronology Center
    info

    Berkeley Geochronology Center

    Berkeley, Estados Unidos

    ROR https://ror.org/01jdekv92

  8. 8 University of Sheffield
    info

    University of Sheffield

    Sheffield, Reino Unido

    ROR https://ror.org/05krs5044

  9. 9 MARE - Marine and Environmental Sciences Centre, Department of Earth Sciences, Univ. Coimbra
  10. 10 Nordic Laboratory for Luminescence Dating, Department of Geoscience, Aarhus University
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Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2016

Issue Title: IX CONGRESO GEOLÓGICO DE ESPAÑA

Issue: 16

Pages: 551-554

Type: Article

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More publications in: Geotemas (Madrid)

Abstract

We present a chronology of paleo-earthquakes established at El Saltador (Lorca), a paleoseismical site in thesouth ern branch of the Alhama de Murcia Fault (Eastern Betics). Because of the difficulties in dating the affect ed sediments using a single dating approach, we combined four types of methods; Two of them based on the luminescence of quartz and feldspar (Quartz-OSL and pIR -IRSL), U-series on pedogenic carbonates and radiocarbon dating. To obtain the best possible accuracy for the age of each paleoearthquake, we integrated the age of the layers that constrain the seismic events into a depositional model. To this end, we relied on the OxCal program (version 4.2), which performs a Bayesian statistical treatment of the probability functions of the ages assigned to a sequence of layers of known stratigraphical order, at the time that it provides the average recurrence and the single recurrence between successive events. The sequence of alluvial deposits analyzed shows the record of eigth paleoseismic events occurred since 54,3 ± 9.1 ka. The average recurrence intervals ranges between 3,5 - and 5,3 ka with the last event taking place between the XIII and XVII centuries.

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