Kinematics of faults between Subbetic Units during the Miocene (central sector of the Betic Cordillera)

Galindo-Zaldı́var, Jesús; Ruano, Patricia; Jabaloy, A.; López-Chicano, M.

doi:10.1016/s1251-8050(00)01484-1

Cited by 9 publications

(17 citation statements)

References 9 publications

(28 reference statements)

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“…The Internal-External Zone Boundary (IEZB) separates the Internal Zones from the External Zones. The IEZB forms a low angle detachment (N50E strike and 25 dip to NW) in the studied area with a top-to-the-W sense of movement (Galindo-Zaldívar et al 2000). Towards the west it bends into an E-W direction.…”

Section: Geological Settingmentioning

confidence: 88%

Repeated palaeoseismic activity of the Ventas de Zafarraya fault (S Spain) and its relation with the 1884 Andalusian earthquake

Reicherter

Jabaloy

Galindo-Zaldı́var

et al. 2003

International Journal of Earth Sciences

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One of the most destructive historical earthquakes (M %6.7) in Spain occurred in 1884 along the normal Ventas de Zafarraya Fault located in the Central Betic Cordilleras. Palaeoseismic and radiocarbon data presented in this study are the first to constrain the timing of the pre-1884 fault history in the last 10 ka. These data yield a recurrence interval of between 2 and 3 ka for major earthquakes, under the assumption of uniform return periods along the normal fault. The Holocene slip rate is estimated to be in the order of 0.35€0.05 mm/year, which is significantly higher than the mean slip rate of 0.17€ 0.03 mm/year since the Tortonian. Several of the most important deformations and secondary features, such as landslides and liquefaction, are related to strong ground motion and document the Holocene activity of the Ventas de Zafarraya Fault.

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Section: Geological Settingmentioning

confidence: 88%

Repeated palaeoseismic activity of the Ventas de Zafarraya fault (S Spain) and its relation with the 1884 Andalusian earthquake

Reicherter

Jabaloy

Galindo-Zaldı́var

et al. 2003

International Journal of Earth Sciences

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“…The study area (Figures and ) comprises the northern front of the Betic Cordillera in contact with the southern margin of the eastern Guadalquivir Basin, where the Subbetic and Prebetic carbonate rocks outline an east‐west mountain front almost parallel to the basin axis (Figure ). North to this front, the basin is occupied by the set of allochthonous and chaotic‐like units that we will call Guadalquivir Units (GUs), following the authors that recognized some grade of tectonic structuration (Figure ), at least at local scales [ García‐Rosell , ; Guezou et al ., ; Galindo‐Zaldívar et al ., ; Platt et al ., ; Ruano et al ., ].…”

Section: Geological Settingmentioning

confidence: 99%

An evaporite‐bearing accretionary complex in the northern front of the Betic‐Rif orogen

et al. 2017

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The Guadalquivir Accretionary Complex forms a largely oblique prism at the northern edge of the Betic‐Rif orogen, where Miocene sediments plus allochthonous evaporite‐bearing units were accreted during the displacement of the Alborán Domain toward the west. Traditional interpretations end the tectonic structuring of the Betic Cordillera at the present topographic front, beyond which gravitational and/or diapiric processes would predominate. However, this study shows pervasive tectonic deformation in the outer prism with coherent oblique shortening kinematics, which is achieved through an alternation of roughly N‐S arcuate thrust systems connected by E‐W transfer fault zones. These structures accord well with the geophysical models that propose westward rollback subduction. The main stage of tectonic activity occurred in the early‐middle Miocene, but deformation lasted until the Quaternary with the same kinematics. Evaporite rocks played a leading role in the deformation as evidenced by the suite of ductile structures in gypsum distributed throughout the area. S‐ and L‐ gypsum tectonites, scaly clay fabrics, and brittle fabrics coexist and consistently indicate westward motion (top to 290°), with subordinate N‐S contraction almost perpendicular to the transfer zones. This work reveals ductile tectonic fabrics in gypsum as a valuable tool to elucidate the structure and deformational history of complex tectonic mélanges involving evaporites above the décollement level of accretionary wedges.

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“…In the western Betics, the main alpine deformation of the External Zones is characterized by NW‐vergent fold‐and‐thrusts post‐Early Burdigalian in age, which are the youngest sediments involved in the deformation [e.g., Crespo‐Blanc and Campos , 2001]. The thrusts that deform the Internal Subbetic units consistently give displacements of the hanging wall toward the NW/WNW [ Kirker and Platt , 1998; Crespo‐Blanc and Campos , 2001; Platt et al , 1995; Galindo‐Zaldívar et al , 2001; Platt et al , 2003; Frizon de Lamotte et al , 2004; Crespo‐Blanc and Frizon de Lamotte , 2006; Balanyá et al , 2007; Crespo‐Blanc , 2007]. Toward the frontal sector of the western Betics, however, the Median and External Subbetic fold‐and‐thrust belt is completely disrupted.…”

Section: Geological Settingmentioning

confidence: 99%

“…Deformation of External Zones along the central and western Betic Cordillera is characterized by a detached fold‐and‐thrust sequence, generally NE‐SW to ENE‐WSW trending, as well as by structures oblique to the tectonic transport direction [ Kirker and McClelland , 1996; Kirker and Platt , 1998; Crespo‐Blanc and Campos , 2001; Galindo‐Zaldívar et al , 2001; Platt et al , 2003; Frizon de Lamotte et al , 2004; Crespo‐Blanc and Frizon de Lamotte , 2006; Balanyá et al , 2007; Crespo‐Blanc , 2007]. The frontal sector of the External Zones progressively acquires complexity toward the west.…”

Section: Introductionmentioning

confidence: 99%

Curved fold‐and‐thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: The Estepa Range (External Zones, Western Betic Cordillera, Spain)

Pedrera¹,

Marín‐Lechado²,

Martos-Rosillo³

et al. 2012

Tectonics

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New structural, borehole, and time domain electromagnetic data allow us to reconstruct the 3‐D geometry of the Estepa range (External Zones of the Western Betic Cordillera), which constitutes an isolated curved fold‐and‐thrust range made up of Jurassic shallow marine carbonates and Cretaceous to Paleocene marls and marly limestones. Contraction and rising load linked to the accretion of the Subbetic nappe enhanced the expulsion of Triassic evaporites and overpressured clays during the early and middle Miocene, finally forming part of a highly deformed mélange unit. This plastic extrusion favored the disconnection of External and Middle Subbetic blocks, including the Sierra de Estepa Range. There, deformation is characterized by northwest‐vergent curved folds‐and‐thrusts associated with NE‐SW frontal ramps and NW‐SE lateral transfer faults that segmented the folds active between 18 and 12 Ma. At a local scale, curvature was achieved under a nearly uniform NW/WNW transport direction suggesting a primary arc type. Friction variation across the heterogeneous detached plastic basal Triassic unit mainly controlled the curvature and segmentation of the fold systems. Transport direction is consistent with previously published slip data from the Internal Subbetic and the Campo de Gibraltar units. After the Late Serravallian, accretion slowed down and a shallow marine unit deposited unconformably placed over the main thrust and folds. The sequence of deformation and emplacement of these ranges is interpreted as a continuous process linked to the early Miocene E continental collision of the Iberian margin thin continental crust and subduction of the Flysch trough oceanic crust beneath the Alboran continental domain.

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Kinematics of faults between Subbetic Units during the Miocene (central sector of the Betic Cordillera)

Cited by 9 publications

References 9 publications

Repeated palaeoseismic activity of the Ventas de Zafarraya fault (S Spain) and its relation with the 1884 Andalusian earthquake

Repeated palaeoseismic activity of the Ventas de Zafarraya fault (S Spain) and its relation with the 1884 Andalusian earthquake

An evaporite‐bearing accretionary complex in the northern front of the Betic‐Rif orogen

Curved fold‐and‐thrust accretion during the extrusion of a synorogenic viscous allochthonous sheet: The Estepa Range (External Zones, Western Betic Cordillera, Spain)

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