300.000 años de historia paleosísmica en la terminación SO de la Falla de Alhama de Murcia (Sistema de falla FAM-Góñar, Béticas Orientales)

  1. M. Ortuño 1
  2. E. Masana 1
  3. J. Martínez-Díaz 2
  4. E. García-Meléndez 3
  5. P. Štěpančíková 4
  1. 1 Universitat de Barcelona
    info

    Universitat de Barcelona

    Barcelona, España

    ROR https://ror.org/021018s57

  2. 2 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  3. 3 Universidad. de León
  4. 4 Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic
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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Any de publicació: 2012

Títol de l'exemplar: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Número: 13

Pàgines: 1523-1526

Tipus: Article

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Altres publicacions en: Geotemas (Madrid)

Resum

The Alhama de Murcia fault (FAM, Oriental Betics) is a slow but seismogenic fault. A paleoseismological study along its southwestern termination revealed its deformation history since 300 ka, an exceptionally long record compared with traditional paleoseismic analyses. A number of facts have favoured this: 1) the deformation being spread among multiple faults, 2) post-IRSL dating of sediments up to 325 ka in age (Sobahti et al., 2011) and 3) a condensed sedimentation record that provided information about a long period of time in trenches shallower than 3 m. Identification, dating and correlation of evidence of seismic events was carried out in 6 trenches at the FAM-Goñar fault system and yielded a common paleoseismic history with a minimum of 6 paleoearthquakes and a maximum recurrence period of 29 ka. According to the length of the system (up to 40 km) and the oblique kinematics of the fault (left lateral and reverse) the fault can produce Mmax = 7 earthquakes.

Fuente de los datos: Dialnet