First evidence of paleoearthquakes along the Carboneras Fault Zone (SE Iberian Peninsula)Los Trances site

  1. Masana, Eulàlia 1
  2. Moreno, X. 1
  3. Gràcia, E. 2
  4. Pallàs i Serra, Raimon 3
  5. Ortuño, M. 3
  6. López, R. 3
  7. Gómez-Novell, O. 3
  8. Ruana, P. 4
  9. Perea, H. 2
  10. Stepancikova, P. 5
  11. Khazaradze, Giorgi 4
  1. 1 Universitat de Barcelona. Departament Dinàmica de la Terra i de l’Oceà
  2. 2 Instituto de Ciencias del Mar
    info

    Instituto de Ciencias del Mar

    Barcelona, España

    ROR https://ror.org/05ect0289

  3. 3 Universitat de Barcelona. Departament de Dinàmica de la Terra i de l’Oceà
  4. 4 Universidad de Granada. Departamento de Geodinámica
  5. 5 Czech Academy of Sciences. Institute of Rock Structure and Mechanics
Mostrar afiliaciones +
Revista:
Geologica acta: an international earth science journal

ISSN: 1695-6133

Año de publicación: 2018

Título del ejemplar: . Special Issue: a tribute to Pere Santanach.

Volumen: 16

Número: 4

Páginas: 461-476

Tipo: Artículo

DOI: 10.1344/GEOLOGICAACTA2018.16.4.8 DIALNET GOOGLE SCHOLAR lock_openDDD editor

Otras publicaciones en: Geologica acta: an international earth science journal

Resumen

Seismogenic faults that have not produced historical large earthquakes remain unnoticed and, thus, are dangerously left out from seismic hazard analyses. The seismogenic nature of the Carboneras Fault Zone, a left-lateral strikeslip fault in the Eastern Betic Shear Zone (southeastern Spain), has not been fully explored to date in spite of having a morphological expression equivalent to the Alhama de Murcia Fault, a seismogenic fault in the same tectonic system. This study provides the first paleoseismic evidence of the seismogenic nature of the CarbonerasFault Zone, based on the analysis of 3 trenches at Los Trances site, on the northwestern edge of the La Serrata Range. Cross cutting relationships and numerical dating, based on radiocarbon, thermoluminescence and U-series, reveal a minimum of 4 paleoearthquakes: Paleoearthquake1 (the oldest) and Paleoearthquake2 took place after 133ka, Paleoearthquake3 occurred between 83–73ka and Paleoearthquake4 happened after 42.5ka (probably after 30.8ka), resulting in a maximum possible average recurrence of 33ka. This value, based on a minimum amount of paleoearthquakes, is probably overestimated, as it does not scale well with published slip-rates derived from offset channels or GPS geodetical data. The characterization of this fault as seismogenic, implies that it should be considered in the seismic hazard analyses of the SE Iberian Peninsula.

€ Ver financiación

Información de financiación

This study has been sponsored by Spanish National Projects: IMPULS (REN2003-05996-MAR), EVENT (CGL2006-12861-C02), SHAKE (CGL2011-30005-C02-01 and CGL2011-30005-C02), RISKNAT-2009SGR/520, RISKNAT-2014SGR/1243 and PREVENT (CGL2015-66263-R). Thermoluminiscence studies were carried out by N. Debenham (Quaternary TL Surveys) and Uranium series by R. Julià (Institut de Ciències de la Terra Jaume Almera - CSIC, Barcelona). They are also thanked for their helpful discussions on dating results. Hector Perea is a fellow researcher under the Marie Sklodowska-Curie Actions (H2020-MSCA-IF-2014 657769). We thank K. Reicherter and J.J. Martínez Díaz and E. Roca, for providing

Financiadores

Fuente de los datos: Dialnet