The Alpujárride-Nevado-Fibábride extensional shear zone, Betic Cordillera, SE Spain

Jabaloy, A.; Galindo-Zaldı́var, Jesús; González-Lodeiro, Francisco

doi:10.1016/0191-8141(93)90148-4

Cited by 113 publications

(114 citation statements)

References 23 publications

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“…The Alboran domain belongs to the formerly Alpine Orogene that was a continuous structure from northwest Africa, along the Betic Cordillera, and to Western Alps during Cretaceous -Neogene. The thrusts bounding the major tectonic complexes (Nevado-filabride, Alpujarride and Malaguide) were later reactivated as low-angle normal faults under regional extensional tectonics (Aldaya et al, 1991;García-Dueñas et al, 1992;Galindo-Zaldívar et al, 1989;Jabaloy et al, 1993). Martínez-Martínez and Azañon (1997) inferred two nearly orthogonal extension episodes from the Burdigalian to the Serravalian.…”

Section: Geodynamic Settingmentioning

confidence: 99%

Active tectonics of the Alhama de Murcia fault, Betic Cordillera, Spain

Martínez‐Díaz

Masana

Ortuño

2012

Journal of Iberian Geology

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We present an overview of the knowledge of the structure and the seismic behavior of the Alhama de Murcia Fault (AMF). We utilize a fault traces map created from a LIDAR DEM combined with the geodynamic setting, the analysis of the morphology, the distribution of seismicity, the geological information from E 1:50000 geological maps and the available paleoseismic data to describe the recent activity of the AMF. We discuss the importance of uncertainties regarding the structure and kinematics of the AMF applied to the interpretation and spatial correlation of the paleoseismic data. In particular, we discuss the nature of the faults dipping to the SE (antithetic to the main faults of the AMF) in several segments that have been studied in the previous paleoseismic works. A special chapter is dedicated to the analysis of the tectonic source of the Lorca 2011 earthquake that took place in between two large segments of the fault.Keywords: Alhama de Murcia Fault, Betic Cordillera, active faults, slow-moving faults, strike-slip faults. ResumenEn este estudio se presenta una revisión del conocimiento que hasta la actualidad se tiene de la estructura y comportamiento sismogenético de la Falla de Alhama de Murcia (AMF). Se utiliza un nuevo mapa de la traza de la AMF realizado a partir de un modelo -Díaz et al. / Journal of Iberian Geology 38 (1) 2012: 253-270 Martínez IntroductionThe Alhama de Murcia Fault (AMF) (Bousquet et al., 1979) is a strike-slip shear zone with reverse component that crosses the eastern Betic cordillera with a NE-SW direction ( Fig. 1). The AMF accommodates ~ 0.1 -0.6 mm/yr of the approximately 5 mm/yr of convergence between Nubian and Eurasian plates (Masana et al., 2004) and is one of the largest faults of the Eastern Betics Shear Zone (Silva et al., 1993). Many of the largest damaging historical earthquakes occurred in the eastern Betic Cordillera are related to this structure (Fig. 1).The most damaging earthquake occurred in Spain in the last 50 years took place next to the city of Lorca (11/05 2011, Mw 5.2). In spite of its moderate size this earthquake produced massive damage in this city. This earthquake has been related to the activity of the AMF (i. e. IGME, 2011;Vissers and Meijninger, 2011; LopezComino et al., 2012;. In recent years several studies have focused on the characterization of the paleoseismic activity and the determination of AMF seismic parameters: slip rate, recurrence interval, maximum magnitude Masana et al., 2004, 2005, Masana, 2010Ortuño et al., 2012). All of these parameters were obtained by the study of trenches excavated in sites that were appropriated to identify recent (preferably later Quaternary) surface ruptures. Until now, these studies have been restricted to two of the four segments that form the AMF. The correct interpretation of these data and the correct extrapolation to the whole fault requires a good knowledge of the deep and shallow structure of the fault zone. But this also requires improving our understanding of the relationships between th...

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Section: Geodynamic Settingmentioning

confidence: 99%

Active tectonics of the Alhama de Murcia fault, Betic Cordillera, Spain

Martínez‐Díaz

Masana

Ortuño

2012

Journal of Iberian Geology

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“…In a framework of continuous N-S to NW-SE convergence, subduction and subsequent collision, with the destruction of Mesozoic oceanic basins (e.g., Martín-Algarra, 1987) and slab rollback, reasonably explain the latest Oligocene to middle Miocene evolution of the Betic-Rif cordilleras and the development of the large Alborán basin (e.g., Lonergan and White, 1997). Therefore, during the early and middle Miocene the metamorphic rocks of the Alborán Domain were exhumed at the footwall of extensional brittle-ductile detachments (Aldaya et al, 1984;Galindo-Zaldívar, 1986;García-Dueñas and Martínez-Martínez, 1988;Jabaloy et al, 1993) (Comas et al, 1992(Comas et al, , 1999Soto et al, 1996;Chalouan and Michard, 2004). Roughly since the late Miocene, the subduction shifted to N-S/NW-SE continental collision, the crust started to thicken, and the northern margin of the Alborán basin progressively emerged.…”

Section: Introductionmentioning

confidence: 99%

“…After the end of metamorphism in the Internal Zones, a set of top-to-the west low-angle normal faults thinned the crust and exhumed the Nevado-Filábride complex, up to the middle Miocene (e.g., Aldaya et al, 1984;Galindo Zaldívar, 1986;García-Dueñas and Martínez-Martínez, 1988;Jabaloy et al, 1993). Afterwards, the crustal-thinning process shifted to crustal thickening and relief formation, when the Sierra Nevada and Sierra de los Filabres started to emerge (Braga et al, 2003) as large antiforms that folded the extensional detachments that generates a steep scarp.…”

Section: Miocene Tectonic Structuresmentioning

confidence: 99%

Recent and active faults and folds in the central-eastern Internal Zones of the Betic Cordillera

Pedrera

Galindo-Zaldı́var

Marín‐Lechado

et al. 2012

Journal of Iberian Geology

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The most recent tectonic structures of the central-eastern Internal Zones of the Betic Cordillera (from 3.1ºW to 1.7ºW and to the south of 37.525ºN) include fault and folds developed from the Late Miocene onwards, which are related to N-S/NW-SE directed continental collision and moderate thickening of a crust that is relatively hot at depth. In this setting, E-W to WSW-ENE folds, with locally associated E-W transpressive right-lateral and reverse faults, favoured the emersion of the northern Alborán basin palaeomargin and the progressive intramontane basin disconnection. The NNE-SSW to NE-SW trending regional left-lateral Palomares and Carboneras fault zones are dominant structures in the easternmost part of the cordillera. In addition, NW-SE to WNW-ESE trending normal and oblique-slip normal faults are widespread. The collision is still active and continues to drive active folds and faults, some probably being the likely source of moderate-sized earthquakes. The Campo de Dalías and surrounding sectors, deformed by active ENE-WSW folds and NW-SE to WNW-ESE oblique-slip normal faults, are probably the sites with the largest FRQFHQWUDWLRQ RI VLJQL¿FDQW HDUWKTXDNHV GXULQJ UHFHQW \HDUV 0RGHUDWHPDJQLWXGH HDUWKTXDNHV 0Z WR KDYH RFFXUUHG WKHUH at fairly regular intervals, in 1804, 1910, and 1994. Toward the east, NW-SE trending normal faults extending from Almería to the Tabernas basin deform the Quaternary rocks with associated moderate seismicity (the 2002 Gergal Mw 4.7 earthquake, and possibly the 1894 Nacimiento earthquake, felt with intensity VII). In the Sorbas-Vera basin, the Palomares fault zone is also responsible for moderate-sized earthquakes (1518 Vera earthquake). In the Almanzora corridor, NW-SE to WNW-ESE trending Lúcar-Somontín faults also could be considered one of the possible source of moderate-magnitude seismicity (1932 Lúcar, Mw 4.8 earthquake felt ISSN (print): 1698-6180. ISSN (online): 1886

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“…They revealed large-scale extension associated with HT metamorphism (among others Fernandez et al, 2016;Negro et al, 2006;Platt and Whitehouse, 1999) and formation of crustal scale detachements (Augier et al, 2005;Caby et al, 2001;Crespo-Blanc et al, 1994;Jabaloy et al, 1993;Platt et al, 2005) producing deep unroofing during the Late OligoceneEarly Miocene, within the AlKaPeCa domain (Bruguier et al, 2009;Michard et al, 2006;Monié et al, 1992;Monié et al, 1994;Platt et al, 2003). This Miocene signal shows diachronous stages between the "AlKa" and "PeCa" domains, being older for the Peloritani and Calabria than for Alboran and the Kabylie basement (Michard et al, 2006;Platt et al, 2013 for the Betics-Rif-Tell data; Heymes et al, 2010;Rossetti et al, 2004Rossetti et al, , 2010 for the Peloritani-Calabria data).…”

Section: Extensional Deformation In Alkapeca Far Effects In the Forementioning

confidence: 99%

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

Leprêtre

Lamotte

Combier

et al. 2018

BSGF - Earth Sci. Bull.

105

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-The Tell-Rif (Tell in Algeria and Tunisia; Rif in Morocco) is the orogenic system fringing to the south the West Mediterranean basins. This system comprises three major tectonic-palaeogeographic zones from north to south: (1) the internal zones (AlKaPeCa for Alboran, Kabylies, Peloritan, Calabria) originating from the former northern European margin of the Maghrebian Tethys, (2) the "Flyschs zone" regarded as the former cover of the oceanic domain and (3) the external zones, forming the former southern Maghrebian Tethys margin more or less inverted. The Tell-Rif is interpreted as the direct result of the progressive closure of the Maghrebian Tethys until the collision between AlKaPeCa and Africa and, subsequently, the propagation of the deformation within Africa. This gives a consistent explanation for the offshore Neogene geodynamics and most authors share this simple scenario. Nevertheless, the current geodynamic models do not completely integrate the Tell-Rif geology. Based on the analysis of surface and sub-surface data, we propose a reappraisal of its present-day geometry in terms of geodynamic evolution. We highlight its non-cylindrical nature resulting from both the Mesozoic inheritance and the conditions of the tectonic inversion. During the Early Jurassic, we emphasize the development of NE-SW basins preceding the establishment of an E-W transform corridor connecting the Central Atlantic Ocean with the Ligurian Tethys. The Maghrebian Tethys developed just after, as the result of the Late Jurassic-Early Cretaceous left-lateral spreading between Africa and Iberia. By the Late Cretaceous, the occurrence of several tectonic events is related to the progressive convergence convergence between the two continents. A major pre-Oligocene (pre-35 Ma) compressional event is recorded in the Tell-Rif system. The existence of HP-LT metamorphic rocks associated with fragments of mantle in the External Metamorphic Massifs of the Eastern Rif and Western Tell shows that, at that time, the western part of the North-African margin was involved in a subduction below a deep basin belonging to the Maghrebian Tethys. At the same time, the closure of the West Ligurian Tethys through east-verging subduction led to a shift of the subduction, which jumped to the other side of AlKaPeCa involving both East Ligurian and Maghrebian Tethys. Slab rollback led to the development of the Oligo-Miocene back-arc basins of the West-Mediterranean, reworking the previous West Ligurian Tethys suture. The docking of AlKaPeCa against Africa occurred during the Late Burdigalian (17 Ma). Subsequently, the slab tearing triggered westward and eastward lateral movements that are responsible for the formation of the Gibraltar and Tyrrhenian Arcs respectively. The exhumation of the External Metamorphic Massifs occurred through tectonic underplating during the westward translation of the Alboran Domain. It resulted in the formation of both foredeep and wedge-top basins younger and younger westward. The lack of these elements in the eastern part ...

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The Alpujárride-Nevado-Fibábride extensional shear zone, Betic Cordillera, SE Spain

Cited by 113 publications

References 23 publications

Active tectonics of the Alhama de Murcia fault, Betic Cordillera, Spain

Active tectonics of the Alhama de Murcia fault, Betic Cordillera, Spain

Recent and active faults and folds in the central-eastern Internal Zones of the Betic Cordillera

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

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