Slab fragmentation beneath the Aegean/Anatolia transition zone: Insights from the tectonic and metamorphic evolution of the Eastern Aegean region

Abstract

Slab fragmentation beneath the Aegean/Anatolia transition zone: Insights from the tectonic and metamorphic evolution of the Eastern Aegean region. Tectonophysics, Elsevier, 2019, 754, pp.

Morphotectonic Analysis along the Northern Margin of Samos Island, Related to the Seismic Activity of October 2020, Aegean Sea, Greece

“…The only outcrop of marine sediments in the area occurs at the southeastern part of Ikaria Island, dated as Lower Pliocene with unconformable Pleistocene submarine terraces [38][39][40]. On the other hand, the Kallithea detachment in West Samos and its counterparts in Ikaria (Kefala detachment) and Thymaena islands [26,40,41] indicate N-S extension already in the (?) Late Miocene-Early Pliocene.…”

“…The tectonic units of the alpine basement form a nappe pile of four metamorphic and one non-metamorphic unit: (i) the Kerketeas carbonate platform at the base, representing the relative autochthon, forming a tectonic window at the western part of Samos, (ii) the Aghios Ioannis unit, the Ambelos nappe and the Vourliotes nappe occurring mainly in the central and eastern parts of the island and (iii) the uppermost non-metamorphic nappe of Kallithea, lying directly on the relative autochthon Kerketeas marbles through a late extensional detachment [23][24][25][26]. The observation of Upper Miocene granitic dikes intruding the metamorphic rocks beneath the Kallithea detachment plane within the westernmost coast of Samos Island indicates a Late Miocene-Pliocene age of the late tectonic movement [22,26]. The E-W orientation of Samos Island is the result of Quaternary deformation that created an E-W tectonic horst structure bounded by fault zones running parallel to the northern and southern coasts, respectively [27].…”

Seismic Tomographic Imaging of the Eastern Mediterranean Mantle: Implications for Terminal‐Stage Subduction, the Uplift of Anatolia, and the Development of the North Anatolian Fault

“…At shallower depths, vertical tears in the subducting slab have been imaged, with variable resolution, beneath the Isparta Angle (Berk Biryol et al., 2011; De Boorder et al., 1998; Delph et al., 2015; Govers & Fichtner, 2016; van Hinsbergen et al., 2010) with different slab dips either side of the tear (Delph et al., 2017; Portner, Delph, et al., 2018). Tears have been deduced from relatively slow velocities coinciding with SW Anatolia at <200 km depth (e.g., Bakırcı et al., 2012; Berk Biryol et al., 2011; Portner, Delph, et al., 2018), supporting a hypothesis of mantle upwelling through a slab window, which in turn may affect surface magmatic processes (e.g., Roche et al., 2019). Shear‐wave anisotropy studies (e.g., Kaviris et al., 2018; Paul et al., 2014; Wei et al., 2019) detect changes in fast directions from NE‐SW to NW‐SE in the same region, attributed to asthenospheric toroidal flow around slab edges (Confal et al., 2018; Wei et al., 2019).…”

Geological and hydrometeorological hazards and related disasters amid COVID-19 pandemic in Greece: Post-disaster trends and factors affecting the COVID-19 evolution in affected areas

“…11 e-11f). Most damage was observed within basins of the affected area filled with Neogene formations and loose Quaternary deposits ( Lekkas et al, 2020d , Lekkas et al, 2020e ), lying over the alpine basement of the island comprising mainly metamorphic formations ( Roche et al, 2019 ).

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