Aegean tectonics: Strain localisation, slab tearing and trench retreat

Jolivet, Laurent; Faccenna, Claudio; Huet, Benjamin; Labrousse, Loïc; Pourhiet, Laëtitia Le; Lacombe, Olivier; Lecomte, Emmanuel; Burov, Evgenii; Denèle, Yoann; Brun, Jean‐Pierre; Philippon, Mélody; Ambert, Paul; Salaün, G.; Karabulut, Hayrullah; Piromallo, Claudia; Monié, Patrick; Gueydan, Frédéric; Okay, Aral I.; Oberhänsli, Roland; Pourteau, Amaury; Augier, Romain; Gadenne, Leslie; Driussi, Olivier

doi:10.1016/j.tecto.2012.06.011

Cited by 483 publications

(398 citation statements)

References 356 publications

(622 reference statements)

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“…The width of this continuously subducting lithosphere was then probably reduced by several episodes of slab tearing, leading to an increase of its retreating rate. Since the middle Miocene, large-scale block rotations ( figure 3) and evolution of magmatism in the Cyclades and western Anatolia (see details in Section 5.5) support the existence of a slab tear below western Anatolia, as suggested by several tomographic models [de Boorder et al, 1998;Wortel and Spakman, 2000;Piromallo and Morelli, 2003;Jolivet et al, 2009Jolivet et al, , 2013Brun and Sokoutis, 2010;Salaün et al, 2012]. The reduced width of the slab thus could have induced its fast retreat and the fast rotation of the Hellenic trench from 15 to 8…”

mentioning

confidence: 75%

“…Several studies focused on the respective contributions of crustal and mantle processes in driving crustal deformation. For Armijo et al [1999], the main force moving Anatolia is the push from the Arabia-Eurasia collision in a typical extrusion model, while in more recent contributions, the main force is slab roll-back Becker and Faccenna, 2011;Jolivet et al, 2013;Sternai et al, 2014]. Paul et al, 2014].…”

Section: Driving Forces Acting On the Westward Extrusion Of Anatoliamentioning

confidence: 99%

“…The surge of magmatism in the eastern Aegean domain in the Miocene, with composition evolving from high-K calc-alkaline to alkaline (including shoshonitic composition), is not evenly distributed over the entire back-arc domain but instead is localized above the slab tear postulated from seismic tomographic models [de Boorder et al, 1998;Wortel and Spakman, 2000;Jolivet et al, 2013;. In addition, the westward emplacement of syn-tectonic intrusions from the Menderes massif to the Cyclades in the Miocene (figure 11), associated with an increase of the mantle source component of these magmas [Stouraiti et al, 2010;Jolivet et al, 2015], can be correlated with this slab tear.…”

Section: Modulation Of Magmatic Evolution By Slab Tearing and Mantle mentioning

confidence: 99%

“…Recent studies of Mediterranean subduction zones and back-arc basins have prompted the development of new models of interactions between slab dynamics, asthenospheric flow and lithospheric deformation Jolivet et al, 2009Jolivet et al, , 2013Brun and Sokoutis, 2010;Faccenna and Becker, 2010;Sternai et al, 2014]. These include (1) conceptual models based on the tectonic history recorded in subduction zones or mountain belts and their back-arc regions and on geophysical data, such as seismic anisotropy or seismic tomography,…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, the differential Pliocene-Quaternary large-scale counterclockwise rotations in the Hellenides and the Peloponnese (figure 3) and the second acceleration of trench retreat since ~5 Ma (figure 12b) could have been a consequence of a younger slab tear below the Corinth rift, decoupling the surface kinematics and crustal deformation between the Hellenides and the Peloponnese [Royden and Papanikolaou, 2011;Jolivet et al, 2013].…”

mentioning

confidence: 99%

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Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

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mentioning

confidence: 75%

Section: Driving Forces Acting On the Westward Extrusion Of Anatoliamentioning

confidence: 99%

Section: Modulation Of Magmatic Evolution By Slab Tearing and Mantle mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

2016

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Mantle dynamics in the Mediterranean

et al. 2014

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The Mediterranean offers a unique opportunity to study the driving forces of tectonic deformation within a complex mobile belt. Lithospheric dynamics are affected by slab rollback and collision of two large, slowly moving plates, forcing fragments of continental and oceanic lithosphere to interact. This paper reviews the rich and growing set of constraints from geological reconstructions, geodetic data, and crustal and upper mantle heterogeneity imaged by structural seismology. We proceed to discuss a conceptual and quantitative framework for the causes of surface deformation. Exploring existing and newly developed tectonic and numerical geodynamic models, we illustrate the role of mantle convection on surface geology. A coherent picture emerges which can be outlined by two, almost symmetric, upper mantle convection cells. The downwellings are found in the center of the Mediterranean and are associated with the descent of the Tyrrhenian and the Hellenic slabs. During plate convergence, these slabs migrated backward with respect to the Eurasian upper plate, inducing a return flow of the asthenosphere from the back-arc regions toward the subduction zones. This flow can be found at large distance from the subduction zones and is at present expressed in two upwellings beneath Anatolia and eastern Iberia. This convection system provides an explanation for the general pattern of seismic anisotropy in the Mediterranean, first-order Anatolia, and Adria microplate kinematics and may contribute to the high elevation of scarcely deformed areas such as Anatolia and eastern Iberia. More generally, the Mediterranean is an illustration of how upper mantle, small-scale convection leads to intraplate deformation and complex plate boundary reconfiguration at the westernmost terminus of the Tethyan collision.

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Observation of the spread of slow deformation in Greece following the breakup of the slab

Durand

Bouchon

Floyd

et al. 2014

Geophysical Research Letters

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Over the past two decades, geophysical observations have shown that earthquakes can trigger other earthquakes, raising the possibility that earthquake interaction plays an important role in the earth's deformation. We analyze here a "storm" of earthquakes in Greece and show that their interaction provides remarkable insight into the mechanics of one of the fastest deforming continental region in the world. A rupture of the African slab initiates a cascade of large earthquakes and a long episode of slow slip marking the downward plunge of the slab, the concomitant rollback of the subduction, and the subsequent detachment of southern Greece from the Eurasian plate. Intense crustal deformation, indicative of the resulting plate stretching, follows. This slow deformation which spreads in a few months over more than 500 km lasts~3 years and triggers earthquakes. The observations also show that the retreat of the African subduction is the motor of the Aegean deformation.

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Aegean tectonics: Strain localisation, slab tearing and trench retreat

Cited by 483 publications

References 356 publications

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

Mantle dynamics in the Mediterranean

Observation of the spread of slow deformation in Greece following the breakup of the slab

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