@misc{10481/70167,
year = {2021},
month = {6},
url = {http://hdl.handle.net/10481/70167},
abstract = {Understanding active tectonics and seismicity in extensional settings requires the analysis
of high-angle normal faults (HANFs) and the transfer of deformation at depth. The debate surrounds
the role of low-angle normal faults (LANFs) in triggering high magnitude earthquakes. The central Betic
Cordillera is an active seismic zone affected by the NNW-SSE Eurasia-Nubia convergence and orthogonal
extension. The seismicity and present-day stress determined by earthquake focal mechanisms reveals the
activity of a NE-SW extensional system in the shallowest 12 km of the Granada Basin. The structure of
the sedimentary infill, as derived by geological field and gravimetric techniques, suggests the formation
of a half-graben tilted to the N-NE. Seismologic data suggest the activity of HANFs above 6–7 km depth
and a LANF zone around 6–12 km depth, with related earthquakes of up to Mw 4.0 and 20° to 30° fault
dips. High-precision leveling lines highlight the importance of the Granada Fault in the system, with
average vertical displacement rates of 0.35–1.1 mm/yr. These data suggest creep fault behavior at the
surface and increased seismicity at depth. The upper crustal extension in the collisional Betic Cordillera is
accommodated by a top-to-the-WSW extensional detachment related to westward motion and rollback in
the Gibraltar Arc and the gravitational collapse of the cordillera, in a framework of NNW-SSE shortening.
This comprehensive study draws a new scenario that advances understanding of relationships between
HANFs and LANFs.},
organization = {Spanish projects DAMAGE. Grant Number: CGL2016-80687-R AEI/FEDER},
organization = {Evaluación de la Peligrosidad de Inestabilidades de Laderas Asociadas a Terremotos. Grant Number: CGL2015-65602-R AEI-FEDER},
organization = {Junta de Andalucia; European Regional Development Fund. Grant Numbers: AGORA P18-RT-3275, PAPEL B-RNM-301-UGR18},
organization = {Programa Operativo FEDER-Andalucia 2014–2020},
organization = {University of Jaén. Grant Number: POAIUJA 21/22},
organization = {Junta de Andalucía (Andalusian Board). Grant Numbers: RNM-148, RNM-282, RNM-370},
publisher = {Wiley Online Library},
keywords = {Tectonics},
keywords = {Betic Cordilleras},
keywords = {Cuenca de Granada},
keywords = {Active faults},
keywords = {Geodesy},
keywords = {Seismicity},
keywords = {Active tectonics},
keywords = {Tectónica Activa},
title = {High- and Low-Angle Normal Fault Activity in a Collisional Orogen: The Northeastern Granada Basin (Betic Cordillera)},
doi = {10.1029/2021TC006715},
author = {Madarieta Txurruka, Asier and Galindo Zaldívar, Jesús and González Castillo, María Lourdes and Peláez, José Antonio and Ruiz Armenteros, Antonio M. and Henares, Jesús and Garrido Carretero, María Selmira and Avilés, Manuel and Gil, Antonio J.},
}