The Betic segment of the lithospheric Trans-Alboran shear zone during the Late Miocene

Larouzière, F.D. De; Bolze, Jean; Bordet, Pierre; Hernandez, Jean; Christian, Michel; D'estevou, P. Ott

doi:10.1016/0040-1951(88)90028-5

Cited by 273 publications

(168 citation statements)

References 26 publications

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“…1). The eastern part of the TazaGuercif basin is bordered by the Moulouya Belt shear zone, a SW±NE striking alignment which is also found in the Moroccan Atlas and can be followed through the Alboran basin into the Betic Cordilleras of Spain (De Larouzieres et al, 1988;Meghraoui, Morel, Andrieux & Dahmani, 1996). The Taza-Guercif basin is regarded as a`post-Nappes' basin and existed at least since the late Tortonian.…”

Section: Introductionmentioning

confidence: 92%

Magnetostratigraphy of the Zobzit and Koudiat Zarga sections (Taza-Guercif basin, Morocco): implications for the evolution of the Rifian Corridor

Krijgsman¹,

Langereis²

2000

Marine and Petroleum Geology

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Magnetostratigraphic analyses for two Neogene`post-nappes' successions of the Taza-Guercif basin enable a reliable correlation of the sedimentary sequence to the astronomical polarity time scale. Rock magnetic analyses indicate that hematite is the dominant carrier of the magnetisation in the marine marls of the Melloulou Formation, whereas both magnetite and hematite contribute to the NRM of the near-shore and continental sediments of the Kef Ed Deba and Bou Irhardaiene Formations. Anisotropy of magnetic susceptibility (AMS) measurements indicate that the maximum axes of the magnetic fabric are aligned in a direction SW±NE. This suggests that the AMS is tectonically induced, related to SE±NW compression, in agreement with the major fold and fault systems in the basin. Our magnetostratigraphic correlation shows that the oldest marine sediments in the basin, which are related to the development of the Ri®an Corridor, are dated at approximately 8 Ma. Between 7.2 and 7.1 Ma, just after the Tortonian/Messinian boundary, an important shallowing of the Taza-Guercif basin takes place. This shallowing phase is primarily related to active tectonics, although a small glacio-eustatic sea level lowering also took place. Our results indicate that at least the Taza-Guercif basin, and perhaps the entire Ri®an Corridor, became emerged at an age between 6.7 and 6.0 Ma. Continental deposits, separated from the underlying deposits by a considerable hiatus of 700 kyr, extend into the Pliocene (up to 4.7 Ma). #

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Section: Introductionmentioning

confidence: 92%

Magnetostratigraphy of the Zobzit and Koudiat Zarga sections (Taza-Guercif basin, Morocco): implications for the evolution of the Rifian Corridor

Krijgsman¹,

Langereis²

2000

Marine and Petroleum Geology

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“…Two families of conjugate strike-slip fault systems are active in the Alboran Basin. The main branches of this conjugate system are the left-lateral system that runs from Almeria in South-Eastern Spain towards El Jebha in Northern Morocco, known as the Trans-Alboran Shear Zone (TASZ) (Larouzière et al, 1988;Fernández-Ibáñez et al, 2007); and the right-lateral that runs from Northern Algeria towards Malaga in Southern Spain. The NE-SW trending structures have been described as transpressive, being mainly left-lateral with dip-slip reverse component (Bourgois et al, 1992;Watts et al, 1993;Martínez-Díaz, 2002;Masana et al, 2004;Booth-Rea et al, 2004;Gràcia et al, 2006), while the WNW-ESE structures are mainly right-lateral presenting normal dip-slip component in some areas (Álvarez-Marrón, 1999).…”

Section: Seismic Sourcesmentioning

confidence: 99%

Tsunami hazard at the Western Mediterranean Spanish coast from seismic sources

Álvarez‐Gómez

Aniel-Quiroga

González

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract. Spain represents an important part of the tourism sector in the Western Mediterranean, which has been affected in the past by tsunamis. Although the tsunami risk at the Spanish coasts is not the highest of the Mediterranean, the necessity of tsunami risk mitigation measures should not be neglected. In the Mediterranean area, Spain is exposed to two different tectonic environments with contrasting characteristics. On one hand, the Alboran Basin characterised by transcurrent and transpressive tectonics and, on the other hand, the North Algerian fold and thrust belt, characterised by compressive tectonics. A set of 22 seismic tsunamigenic sources has been used to estimate the tsunami threat over the Spanish Mediterranean coast of the Iberian peninsula and the Balearic Islands. Maximum wave elevation maps and tsunami travel times have been computed by means of numerical modelling and we have obtained estimations of threat levels for each source over the Spanish coast.

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“…1) and the faults belonging to the Alboran Ridge (AR in Fig. 1), this shear zone is known as the Trans-Alboran Shear Zone (TASZ) (Larouziere et al, 1988;Fem.indez-Ibafiez et al, 2007). The main structure of the right-lateral system is the Yusuf Fault (YF in Fig.…”

Section: Tectonic Settingmentioning

confidence: 99%

“…Tectonically, the Alboran Basin is a complex zone that is being squeezed between the approaching Iberian and African plates. This convergence between the two main plates deforms the Alboran thinned crust, forming a set of conjugate shear zones and transpres sive structures, including reverse faults, active since the Late Tortonian (Larouziere et al, 1988;Bourgois et al, 1992;Comas et al, 1992;Vegas, 1992;Woodside and Maldonado, 1992;Watts et al, 1993;Martfnez-Dlaz, 2002;Masana et al, 2004;Gdcia et al, 2006). Although the rate of deformation is low, approximately 4.7 mm/year (McClusky et al, 2003;Stich et al, 2006;Serpelloni et al, 2007), the geomorphological and geophysical data show evidences of recent ruptures and faults large enough to generate great earthquakes (Gd.cia et al, 2006;Mauffret et al, 2007;Ballesteros et al, 2008;Maestro-Gonzalez et al, 2008).…”

mentioning

confidence: 99%

Scenarios for earthquake-generated tsunamis on a complex tectonic area of diffuse deformation and low velocity: The Alboran Sea, Western Mediterranean

et al. 2011

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The Betic segment of the lithospheric Trans-Alboran shear zone during the Late Miocene

Cited by 273 publications

References 26 publications

Magnetostratigraphy of the Zobzit and Koudiat Zarga sections (Taza-Guercif basin, Morocco): implications for the evolution of the Rifian Corridor

Magnetostratigraphy of the Zobzit and Koudiat Zarga sections (Taza-Guercif basin, Morocco): implications for the evolution of the Rifian Corridor

Tsunami hazard at the Western Mediterranean Spanish coast from seismic sources

Scenarios for earthquake-generated tsunamis on a complex tectonic area of diffuse deformation and low velocity: The Alboran Sea, Western Mediterranean

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