Structure and kinematics of the South Iberian paleomargin and its relationship with the Flysch Trough units: extensional tectonics within the Gibraltar Arc fold-and-thrust belt (western Betics)

Crespo‐Blanc, Ana; Campos, Juan

doi:10.1016/s0191-8141(01)00012-8

Cited by 83 publications

(80 citation statements)

References 29 publications

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“…The boundaries of the basin are unconformities. Recent deformation consists predominantly of medium to large scale NNE-SSW and WNW-ESE folds (Crespo Blanc and Campos, 2001), while brittle deformation is scarce and localized (Ruiz Constán et al, 2008). The NE-SW and NNW-SSE minor normal faults mainly deform Tortonian calcarenites and are mainly gathered in the southern part of the basin (Ruiz-Constán et al, 2008).…”

Section: Ronda Sector (Neogene Intramontane Basin)mentioning

confidence: 99%

Recent and active tectonics in the western part of the Betic Cordillera

Ruíz-Constán

Pedrera

Galindo-Zaldı́var

et al. 2012

Journal of Iberian Geology

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Based on new seismological and recent faulting data, we analyze five main sectors in the western part of the Betic Cordillera from an active tectonic perspective: i. The northwestern frontal sector of the cordillera, including the Morón de la Frontera area, with shallow (< 15 km depth) seismogenic active NE-SW reverse and strike-slip faults that do not reach the surface. ii. The Teba area, in the External Zones, which is deformed by sparse N-S to NW-SE normal faults with associated wedges of Quaternary sediments and active strike-slip faults at intermediate crustal levels. iii. The Ronda Basin, representing the major Late Miocene intramontane basin of the western Betic Cordillera, is mainly deformed by NNE-SSW and WNW-ESE folds and locally by NW-SE normal faults. iv. The internal part of the orogen, which is characterized by shallow (<40 km) and intermediate (40 to 120 km depth) seismicity beneath Málaga and the Alborán Sea, ENE-WSW folding, relief uplift, river incision and scarce active faults with surface expression. v. The Spanish Atlantic coast, which coincides with the western end of the Betic orogen, where Pliocene to Quaternary shallowmarine sedimentary rocks are deformed by meso-scale NW-SE oriented normal faults and few ENE-WSW reverse faults. These data support the recent tectonic activity of the western Betic Cordillera determined by the NW-SE Eurasian-African convergence with variable features from the mountain front, characterized by shallow deformations, up to the Internal Zones that mainly undergo uplift and intermediate seismicity.

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Section: Ronda Sector (Neogene Intramontane Basin)mentioning

confidence: 99%

Recent and active tectonics in the western part of the Betic Cordillera

Ruíz-Constán

Pedrera

Galindo-Zaldı́var

et al. 2012

Journal of Iberian Geology

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“…Il s'est formé durant la période Oligocène terminal-Miocène inférieur par l'accrétion de plusieurs domaines crustaux, charriés [9,14,22] sur la zone sud-ibérique, au nord, et sur la zone externe maghrébine, au sud. Ces terrains allochtones forment la partie interne de l'arc appelé « domaine d'Alboran » [9] ou « terrain d'Alboran » [18,39] ; qui repose structuralement sur les unités des Flyschs [9].…”

Section: Contexte Géologiqueunclassified

“…Cette orientation est le résultat du plissement néogène dans la région de Malaga. Cette phase de serrage, connue aussi dans d'autres zones des Cordillères bétiques, est attribuée au Tortonien, comme l'attestent les discordances intratortoniennes régionales [10,22,28].…”

Section: Structure Du Dôme De Santi Petriunclassified

“…1) that shows an antiformal structure [49] that folds the Burdigalian sedimentary sequence and is sealed by Upper-Tortonian marine conglomerates. This folding event most probably took place during the Tortonian as in other areas of the Betics, where intra-Tortonian erosive unconformities have been found [13,22,28].…”

Section: Structure Of the Santi Petri Domementioning

confidence: 99%

“…It was accreted during the Upper Oligocene to Lower Miocene [9,14,22] by the westward oblique superposition of several pre-Miocene crustal domains that were thrusted over the South-Iberian and Maghrebian external domains, which constituted respectively the southern and northern Mesozoic palaeomargins of the Iberian and African plates. The allochthonous terrains found in the internal part of the arc constitute the Alboran crustal domain (ACD) [18,39].…”

Section: Geological Settingmentioning

confidence: 99%

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A ‘core-complex-like structure’ formed by superimposed extension, folding and high-angle normal faulting. The Santi Petri dome (western Betics, Spain)

Booth‐Rea

Azañón

Garcı́a-Dueñas

et al. 2003

Comptes Rendus. Géoscience

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Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

2014

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The western Mediterranean recorded subduction rollback, slab segmentation and separation.Here we address the questions of what caused Oligocene rollback initiation, and how its subsequent evolution split up an originally coherent fore arc into circum-southwest Mediterranean segments. We kinematically reconstruct western Mediterranean geology from subduction initiation to present, using Atlantic plate reconstructions as boundary condition. We test possible reconstructions against remnants of subducted lithosphere imaged by seismic tomography. Transform motion between Africa and Iberia (including the Baleares) between~120 and 85 Ma was followed by up to 150 km convergence until 30 Ma. Subduction likely initiated along the transform fault that accommodated pre-85 Ma translation. By thẽ 30 Ma inception of rollback, up to 150 km of convergence had formed a small slab below the Baleares. Iberia was disconnected from Sardinia/Calabria through the North Balearic Transform Zone (NBTZ). Subduction below Sardinia/Calabria was slightly faster than below the Baleares, the difference being accommodated in the Pyrenees. A moving triple junction at the trench-NBTZ intersection formed a subduction transform edge propagator fault between the Baleares and Calabria slab segments. Calabria rolled back eastward, whereas the Baleares slab underwent radial (SW-S-SE) rollback. After Kabylides-Africa collision, the western slab segment retreated toward Gibraltar, here reconstructed as the maximum rollback end-member model, and a Kabylides slab detached from Africa. Opening of a slab window below the NBTZ allowed asthenospheric rise to the base of the fore arc creating high-temperature metamorphism. Western Mediterranean rollback commenced only after sufficient slab-pull was created from 100 to 150 km of slow, forced subduction before~30 Ma.

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Structure and kinematics of the South Iberian paleomargin and its relationship with the Flysch Trough units: extensional tectonics within the Gibraltar Arc fold-and-thrust belt (western Betics)

Cited by 83 publications

References 29 publications

Recent and active tectonics in the western part of the Betic Cordillera

Recent and active tectonics in the western part of the Betic Cordillera

A ‘core-complex-like structure’ formed by superimposed extension, folding and high-angle normal faulting. The Santi Petri dome (western Betics, Spain)

Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

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