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Title

Active tectonics in the Malaga Basin: evidences from morphotectonic markers (Western Betic Cordillera, Spain)

Other TitlesTectónica activa de la Cuenca de Málaga: evidencias en marcadores morfotectónicos (Cordillera Bética Occidental, España)
AuthorsInsua Arévalo, Miguel; Martínez-Díaz, J. J. ; García Mayordomo, Julián; Martín-González, Fidel
KeywordsActive tectonics
Malaga basin
Morphotectonics
Seismic potential
Western Betic Cordillera
Cordillera Bética Occidental
Cuenca de Málaga
Morfotectónica
Potencial sísmico
Tectónica activa
Issue Date2012
PublisherCSIC-UCM - Instituto de Geociencias (IGEO)
Universidad Complutense de Madrid
Consejo Superior de Investigaciones Científicas (España)
CitationInsua-Arévalo, J. M., Martínez-Díaz, J.J., García-Mayordomo, J., Martín-González, F. (2012). Active tectonics in the Malaga Basin: evidences from morphotectonic markers (Western Betic Cordillera, Spain). Journal of Iberian Geology, 38, 1, 175-190.
Abstract[EN] The Malaga Basin is located in the westernmost part of the Betic Cordillera. This alpine cordillera in the south of Spain is the most active region of the Iberian Peninsula. Some of the most destructive earthquakes occurred historically in Spain took place within the that could be seismogenic sources. First, we study the spatial arrangement and age of the Quaternary alluvial fan system as well as the drainage pattern of the basin, followed by the analysis of the distribution of regional markers like marine erosive surfaces and the extend of Pliocene marine deposits in the Malaga Basin. The tectonic structures inferred as active by the morphotectonic analysis are grouped into four main families: N60º-85ºE folds associated with blind thrust faults, N20º-30ºE and N40º-50ºE high angle dip-slip faults, and N165º-170ºE tear faults. Finally, their seismic potential in terms of maximum moment magnitude (Mw) is assessed by means of empirical relationships, varying between 6.0 and 7.0 depending on the hypothesis considered.
[ES] La cuenca de Málaga se sitúa en la parte más occidental de la cordillera Bética. En esta cordillera alpina del sur de España se han localizado algunos de los terremotos más destructivos ocurridos históricamente en la península Ibérica. En este trabajo se estudian algunos de los aspectos geomorfológicos de la cuenca de Málaga con el fin de indicar las estructuras tectónicas activas que pudiesen ser fuentes sismogénicas. Se estudia la distribución y edad del sistema de abanicos aluviales de la cuenca, así como la red de drenaje. También se analiza la distribución regional de marcadores tectónicos pliocenos, como superficies de erosión marina y los depósitos sedimentarios de este periodo transgresivo.
Publisher version (URL)http://dx.doi.org/10.5209/rev_JIGE.2012.v38.n1.39212
URIhttp://hdl.handle.net/10261/64164
DOI10.5209/rev_JIGE.2012.v38.n1.39212
ISSN1698-6180
E-ISSN1886-7995
Appears in Collections:(IGEO) Artículos
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