Active Collapse in the Central Betic Cordillera: Development of the Extensional System of the Granada Basin
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Show full item recordEditorial
MDPI
Materia
Active tectonics Extensional collapse Stress tensors GNSS Central Betic Cordillera Granada basin
Date
2023-08-10Referencia bibliográfica
Madarieta-Txurruka, A.; Peláez, J.A.; González-Castillo, L.; Gil, A.J.; Galindo-Zaldívar, J. Active Collapse in the Central Betic Cordillera: Development of the Extensional System of the Granada Basin. Appl. Sci. 2023, 13, 9138. [https://doi.org/10.3390/app13169138]
Sponsorship
BARACA (PID2022-136678NB-I00 AEI/FEDER); P18-RT-3275, B-RNM-301-UGR18 (Junta de Andalucía/FEDER); Programa Operativo FEDER Andalucía 2014-2020 Ref. 126344 (University of Jaén); POAIUJA 2023/2024 (University of Jaén) projects and the Andalusian research groups RNM-148, RNM-282; RNM-370; University of Granada; Spanish Ministry of Science, Innovation, and Universities (PTA2019-017685-I/AEI)Abstract
The Betic Cordillera was formed by the collision between the Alboran Domain and the
South Iberian paleomargin in the frame of the NW–SE convergent Eurasia–Nubia plate boundary.
The central region is undergoing a heterogeneous extension that has not been adequately analysed.
This comprehensive study addressed it by collecting structural geologic, seismologic, and geodetic
data. The region west of the Sierra Nevada is deformed by the extensional system of the Granada
Basin, which facilitates E–W to NE–SW extension. Moreover, the southern boundary of Sierra Nevada
is affected by a remarkable N–S extension related to E–W normal to normal–dextral faults affecting
the shallow crust. However, geologic and geodetic data suggest that the western and southwestern
Granada Basin boundary constitutes a compressional front. These data lead to the proposal of an
active extensional collapse from the uplifted Sierra Nevada region to theW–SW–S, over an extensional
detachment. The collapse is determined by the uplift of the central Betics and the subsidence in
the Alboran Basin due to an active subduction with rollback. Our results indicate that the central
Betic Cordillera is a good example of ongoing extensional collapse in the general context of plate
convergence, where crustal thickening and thinning simultaneously occur