RT Journal Article
T1 The role of strain partitioning on intermontane basin inception and isolation, External Western Gibraltar Arc
A1 Jiménez Bonilla, Alejandro
A1 Expósito Ramos, Inmaculada
A1 Balanyá Roure, Juan Carlos
A1 Díaz Azpiroz, Manuel
A1 Barcos, L.
K1 Extensional faults
K1 Geomorphic indices
K1 Intermontane Ronda Basin
K1 Strain partitioning
K1 Western Betics
AB The intermontane Ronda Basin, currently located in the Western Betics External Zones, started as an embayment of the Betic foreland basin during the Tortonian. We have characterized a post-Serravallian, basin-related deformation event that overprinted the former fold-and-thrust belt. Updated structural and kinematic maps allow us to identify NW-SE basinward-dipping normal faults at the southwestern and northeastern boundaries of the basin and NE-SW shortening structures (large-scale folds and reverse faults) affecting both the outcropping basement and partially the basin infill. In order to test the possible tectonic activity of these structures during the last 5Ma, exhaustive geomorphologic analyses in the Ronda Basin area have been done. This included the qualitative study of relief and drainage network, together with the characterization of quantitative indices (SLk, Smf, Vf and HI). These results obtained from this analysis are coherent with structural data and suggest that the identified post-Serravallian structures were active up to at least 5Ma. We also conclude that the Ronda Basin was generated by along strike segmentation of the relief in the Western Betics induced by NE-SW (arc-parallel) stretching accompanied with NW-SE shortening. In the NW basin boundary, the strain was partitioned into ENE-WSW dextral strike-slip faults and NE-SW shortening structures, which gave rise to a Messinian transpressive structural high that disconnected the former Ronda Basin from its parental foreland basin.
PB Elsevier
YR 2015
FD 2015
LK https://hdl.handle.net/10433/22677
UL https://hdl.handle.net/10433/22677
LA en
NO Jiménez-Bonilla, A., Expósito, I., Balanyá, J. C., Díaz-Azpiroz, M., & Barcos, L. (2015). The role of strain partitioning on intermontane basin inception and isolation, External Western Gibraltar Arc. Journal of Geodynamics, 92, 1-17.
NO Departamento de Sistemas Físicos, Químicos y Naturales
DS RIO
RD May 9, 2026