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

Geologica Acta

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Title First evidence of paleoearthquakes along the Carboneras Fault Zone (SE Iberian Peninsula): Los Trances site
 
Creator MASANA, E.
MORENO, X.
GRÀCIA, E.
PALLÀS, R.
ORTUÑO, M.
LÓPEZ, R.
GÓMEZ-NOVELL, O.
RUANO, P.
PEREA, H.
STEPANCIKOVA, P.
KHAZARADZE, G.
 
Subject Paleoseismology; Eastern Betics Shear Zone; Carboneras Fault Zone; Seismogenic fault
 
Description 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.
 
Publisher Geologica Acta
Geologica Acta
Geologica Acta
 
Contributor Universitat de Barcelona
 
Date 2018-12-20
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.4.8
10.1344/GeologicaActa2018.16.4.8
 
Source Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 461-476
Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 461-476
Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 461-476
1696-5728
1695-6133
 
Language eng
 
Relation http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.4.8/28219
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.8/3187
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.8/3188
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.8/3189
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.8/3190
 
Coverage Eastern Betics, Iberian Peninsula, Carboneras


 
Rights Copyright (c) 2018 Geologica Acta
 

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