2026-06-28T15:20:19Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/1311822026-01-29T00:55:23Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Martínez Díaz, José Jesús
author
Masana, Eulàlia
author
Hernández Enrile, José Luis
author
Santanach, Pere
2026-01-28T09:38:17Z
2026-01-28T09:38:17Z
2003
Martínez-Díaz, J. J., et al. «Effects of repeated paleoearthquakes on the Alhama de Murcia Fault (Betic Cordillera, Spain) on the Quaternary evolution of an alluvial fan system». Annals of Geophysics, vol. 46, n.º 5, diciembre de 2003, p. 28. DOI.org (Crossref), https://doi.org/10.4401/ag-3455.
1593-5213
10.4401/ag-3455
https://hdl.handle.net/20.500.14352/131182
2037-416X
https://doi.org/10.4401/ag-3455
In this work we present a study of an alluvial fan system, which is affected by the Quaternary activity of the left-lateral, reverse Alhama de Murcia Fault (Betic Cordillera). Paleoseismic studies in this area yield data that can be compared and correlated with the morphologic and tectono-sedimentary evolution of the alluvial fan. The spatial arrangement of the sedimentary alluvial fan units near the fault zone, shown in trenches, is controlled by the recurrent reverse, left-lateral coseismic events. We analysed the morphology of the drainage network using a 1:5000 scale orthoimage to identify and measure horizontal deflections along the fault. The channel pattern analysis allowed us to estimate the average horizontal slip rate of the SAMF for the last 130 ka. This value is 0.21 mm/a, which is slightly higher than the range of values obtained by trenching analysis for the last 30 ka, (0.06 to 0.15 mm/yr). The interpretation of the stratigraphic sequence exposed along the trench walls constrained the occurrence of at least two surface faulting earthquakes during the last 30000 years. The most recent event happened after the El Saltador Creek dissected the alluvial fan. The penultimate event occurred while the alluvial fan was still active.
eng
Attribution 4.0 International
Effects of repeated paleoeartquakes on the Alhama de Murcia fault (Betic Cordillera, Spain) on the Quaternary evolution of an alluvial fan system
journal article
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URL
https://docta.ucm.es/bitstreams/a2462020-2611-4131-ac01-67dcf01dd5d4/download
File
MD5
6a474283db1058c97c1f17029b49bea6
1886248
application/pdf
Effects_of_repeated_paleoearthquakes.pdf