Barrovian metamorphism in nominally lowermost Alpujarride Complex units: tectonic implications for the development of the orogenic wedge in the Western Mediterranean

Blanco-Quintero, Idael Francisco; Martín‐Algarra, Agustín; Santamaría-Pérez, E.; Gonzáléz-Jiménez, José María; Navas, A. Sánchez; Benavente, David; Cañaveras, Juan Carlos; Garcia‐Casco, Antonio

doi:10.1080/00206814.2023.2233102

International Geology Review

2023

DOI: 10.1080/00206814.2023.2233102

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Barrovian metamorphism in nominally lowermost Alpujarride Complex units: tectonic implications for the development of the orogenic wedge in the Western Mediterranean

Idael Francisco Blanco-Quintero

Agustín Martín‐Algarra

E. Santamaría-Pérez

et al.

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2024

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The offshore Alicante Basin: Late Neogene basin development at the Internal-External Zone Boundary of the eastern Betics, SE Spain

de Ruig

2024

Preprint

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The offshore Alicante Basin is a late Neogene post-orogenic basin located at the northeastern end of the Eastern Betic Shear Zone of southeastern Spain. Based on the integration of legacy 2D seismic data, well data and outcrop geology, this paper provides a comprehensive review and analysis of its stratigraphy, structural geometry and tectonic evolution. The basin was formed as an extensional basin in latest Serravallian-early Tortonian time (ca. 11.5 Ma), accumulating 1500-2000m of marine sediments of Tortonian-Recent age. The basin overlies the tectonic boundary between the low-grade metamorphic Alpujarride units of the Internal Zone, and the non-metamorphic Mesozoic to Middle Miocene sedimentary rocks of the External Zone of the Betic Cordilleras. This Internal-External Zone Boundary is formed by a north-dipping backthrust that was reactivated in Tortonian as extensional basin bounding fault. Active extensional faulting ceased at around 8 Ma, followed by a phase of compression that resulted in basin inversion and basin margin uplift in Late Pliocene-Pleistocene time. Strike-slip tectonics related to the Crevillente Fault and the Eastern Betic Shear Zone appear to have played a minor role in the structuration of the basin, but may have shaped the structure of the Tabarca Ridge and Mazarron Escarpment at the southern margin of the basin. The basin appears to form a boundary zone separating predominantly strike–slip faulting to the south and southwest from predominantly normal faulting to the north, accommodating recent compression at the northern end of the EBSZ.

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The offshore Alicante Basin: Late Neogene basin development at the Internal-External Zone Boundary of the eastern Betics, SE Spain

de Ruig

2024

Preprint

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show abstract

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Barrovian metamorphism in nominally lowermost Alpujarride Complex units: tectonic implications for the development of the orogenic wedge in the Western Mediterranean

Cited by 1 publication

References 73 publications

The offshore Alicante Basin: Late Neogene basin development at the Internal-External Zone Boundary of the eastern Betics, SE Spain

The offshore Alicante Basin: Late Neogene basin development at the Internal-External Zone Boundary of the eastern Betics, SE Spain

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