Velocidad de desplazamiento de la falla de Alhama de Murcia calculada mediante técnicas paleosismológicas y morfotectónicas

  1. M. Ferrater 1
  2. M. Ortuño 1
  3. E. Masana 1
  4. J.J. Martínez-Díaz 2
  5. R. Pallàs 1
  6. A. Medialdea 3
  7. H. Perea 4
  8. S. Baize 5
  9. E. García-Meléndez 6
  10. A. Echeverria 1
  11. T. Rockwell 7
  12. W.D. Sharp 8
  13. E. Rhodes 3
  14. R. Arrowsmith 9
  1. 1 Univ. de Barcelona
  2. 2 Universidad Complutense, Instituto de Geociencias IGEO (UCM, CSIC)
  3. 3 University of Sheffield
    info

    University of Sheffield

    Sheffield, Reino Unido

    ROR https://ror.org/05krs5044

  4. 4 Institut de Ciències del Mar - CSIC
  5. 5 Institut de Radioprotection et Sûreté Nucléaire - Seismic Hazard Division (BERSSIN)
  6. 6 Universidad de León
    info

    Universidad de León

    León, España

    ROR https://ror.org/02tzt0b78

  7. 7 San Diego State University
    info

    San Diego State University

    San Diego, Estados Unidos

    ROR https://ror.org/0264fdx42

  8. 8 Berkeley Geochronology Center
    info

    Berkeley Geochronology Center

    Berkeley, Estados Unidos

    ROR https://ror.org/01jdekv92

  9. 9 Arizona State University
    info

    Arizona State University

    Tempe, Estados Unidos

    ROR https://ror.org/03efmqc40

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Revue:
Geotemas (Madrid)

ISSN: 1576-5172

Année de publication: 2016

Titre de la publication: IX CONGRESO GEOLÓGICO DE ESPAÑA

Número: 16

Pages: 511-514

Type: Article

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D'autres publications dans: Geotemas (Madrid)

Résumé

We calculated the slip rate of the Alhama de Murcia fault by means of two techniques: a) paleoseismology, and b) a morphotectonic analysis. These methodologies measure the offset of a linear feature whose age is known. In the Lorca-Totana segment of the fault, we carried out a three-dimensional trenching campaign to identify and measure the offset of a buried paleochannel. The age of the paleo channel was constrained by new approaches of OSL , radiocarbon and U -series applied to small amounts of pedogenic carbonate datings. The mean net slip rate obtained is 0.9 mm/a. In the southernmost termination of the fault (Goñar-Lorca segment), we analysed eight offset channels in surface. The maximum ages of the channels (age of the surface in which they are entrenched) were estimated in base ofprevious geomorphological maps and of publ ished ages (thermoluminescence) together with new datings of pedogenic carbonate. The minimum lateral slip rate for the fault in this area is 1.7-1.6 mm/a. These slip rate values position the Alhama de Murcia fault as one of the most active faults in the Eastern Betics Shear Zone.

La source de données: Dialnet