Preliminary palaeomagnetic results from the Subbetic Zone (Betic Cordillera, southern Spain): kinematic and structural implications

Osete, M. L.; Freeman, R.; Vegas, R.

doi:10.1016/0031-9201(88)90121-5

Cited by 40 publications

(16 citation statements)

References 27 publications

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“…Dans les autres affleurements de la zone Subbétique, on n'observe pas de surfaces de référence horizontales préalables qui permettent de déterminer si les translations vers l'ouest correspondent à des failles normales à faible pendage ou à des failles inverses. Cependant, si l'on tient compte des études paléomagnétiques [12,13], l'unité Subbétique intermédiaire a subi une rotation horaire pendant le Miocène, et l'orientation initiale serait probablement semblable à celle de la Sierra Gorda, qui appartient à l'unité Subbétique supérieure, qui n'a pas subi de rotation. Les plis se sont probablement formés avec des axes orientés nord-sud, à peu près orthogonaux au sens des translations.…”

Section: Discussion Et Conclusionunclassified

“…The fault rocks of the thrusts in the Upper Subbetic Unit, in Sierra Gorda, indicate displacements of the hanging wall blocks towards the WSW (figures 1 and 2). In this region, which has not undergone important rotations, according to palaeomagnetic studies [12,13], thrust kinematics are approximately perpendicular to the fold axes and to the strikes of the reverse faults ( figure 1). …”

Section: Kinematics Of the Major Contacts Between Units Of The Subbetmentioning

confidence: 93%

“…Une hypothèse différente [4] a supposé que le Subbétique est une grande structure en fleur, associée à un décrochement profond. Par ailleurs, les données paléomagnétiques indiquent que la plupart des unités du Subbétique, sauf la Sierra Gorda, ont subi des rotations horaires de près de 60°, probablement pendant le Miocène [12,13].…”

Section: Données D'ensembleunclassified

“…Cette région, selon les études paléomagnétiques [12,13], n'a pas subi de rotations importantes, et la direction de translation des charriages est presque perpendiculaire aux axes des plis et à la direction des failles inverses (figure 1).…”

Section: Cinématique Des Contacts Majeurs Entre Les Unités De La Zoneunclassified

“…A different hypothesis has been proposed [4]: the Subbetic units are in a huge flower structure associated at depth with a transcurrent fault. Meanwhile, palaeomagnetic data appear to indicate that almost all of the units of the Subbetics, with the exception of Sierra Gorda, underwent clockwise rotations of nearly 60°dur-ing the Miocene [12,13].…”

Section: General Settingmentioning

confidence: 99%

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

Galindo-Zaldı́var

Ruano

Jabaloy

et al. 2000

Comptes Rendus de l'Académie des Sciences - Series IIA - Earth

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-The kinematic analysis of the low-angle faults that separate the major units of the Subbetic Zone indicates two main stages of translations. In the first stage, of Burdigalian to basal Tortonian age, the hanging walls moved toward the WSW, and thrusts developed in some sectors of the External Zones. Simultaneously, in the Internal Zones, the activity of extensional detachments shows the same kinematics. In the second stage, affecting up to basal Tortonian rocks, northwest-verging thrusts were active. The Subbetic tectonic units probably underwent relative rotation during the development of these structures. © 2000 Académie des sciences / Éditions scientifiques et médicales Elsevier SAS

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Section: Discussion Et Conclusionunclassified

Section: Kinematics Of the Major Contacts Between Units Of The Subbetmentioning

confidence: 93%

Section: Données D'ensembleunclassified

Section: Cinématique Des Contacts Majeurs Entre Les Unités De La Zoneunclassified

Section: General Settingmentioning

confidence: 99%

See 3 more Smart Citations

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

Galindo-Zaldı́var

Ruano

Jabaloy

et al. 2000

Comptes Rendus de l'Académie des Sciences - Series IIA - Earth

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Paleomagnetism in the Mediterraneum from Spain to the Aegean: a review of data relevant to Cenozoic movements

Márton¹

1993

Recent Evolution and Seismicity of the Mediterranean Region

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New Palaeomagnetic Data from the Betic Cordillera: Constraints on the Timing and the Geographical Distribution of Tectonic Rotations in Southern Spain

Osete

Villalaín

Palencia

et al. 2004

Pure and Applied Geophysics

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A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presence of two stable magnetic components of the natural remanent magnetisation: 1) a secondary Neogene syn-folding component and 2) the original Jurassic magnetisation. As similar characteristics have been reported in Jurassic limestones from the western Subbetic Zone, a widespread remagnetisation event took place within <10 6 years in the entire Subbetic region during Neogene times. In contrast, in the Prebetic region, no evidence for a secondary overprint has been detected. Palaeomagnetic Jurassic declinations indicate variable and locally very large clockwise rotations (35°-140°), but the two sites in the north-westernmost part of the investigated region are not rotated. The use of both components of magnetisation and the incremental fold-test results allowed the timing of block rotations in the Subbetic Zone to be constrained. Rotations in the western Subbetic occurred after the acquisition of the secondary overprint, whereas in the central part of the Subbetic Zone they were completed by the time of the remagnetisation event.

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Preliminary palaeomagnetic results from the Subbetic Zone (Betic Cordillera, southern Spain): kinematic and structural implications

Cited by 40 publications

References 27 publications

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

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

Paleomagnetism in the Mediterraneum from Spain to the Aegean: a review of data relevant to Cenozoic movements

New Palaeomagnetic Data from the Betic Cordillera: Constraints on the Timing and the Geographical Distribution of Tectonic Rotations in Southern Spain

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