The Eastern Black Sea and Caucasus Domain Origin and Its Tectonic Evolution: New Insights from Results of a Decade of Field Works and of Geophysical Research

Sosson, Marc; Stephenson, Randell; Adamia, Shota; Avagyan, Ara; Kangarli, Talat; Yegorova, Tamara; Sheremet, Yevgeniya; Barrier, Éric; Rolland, Yann; Hässig, Marc; Candaux, Zoé; Alania, Victor; Enukidze, O.; Sadradze, Nino; Sahakyan, Lilit; Galoyan, Ghazar; Vardanyan, S. O.

doi:10.1007/978-3-030-01455-1_66

Cited by 1 publication

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“…Particularly, some regional paleo-reconstructions (e.g., Barrier and Vrielynck, 2008;Barrier et al, 2018) suggest that during the Mesozoic-Cenozoic times, Daralagöz was a part of the Tauride-Anatolian platform. The basement of the Khoy basin is considered to be a part of the South Armenian Block, and the Khoy ophiolites to be obducted on the block from the Sevan-Akera suture zone (e.g., Avagyan et al, 2016;Sosson et al, 2016Sosson et al, , 2019.…”

Section: Geology and Geodynamicsmentioning

confidence: 99%

Geodynamics, seismicity, and seismic hazards of the Caucasus

Ismail‐Zadeh

Adamia

Chabukiani

et al. 2020

Earth-Science Reviews

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Being a part of ongoing continental collision between the Arabian and Eurasian plates, the Caucasus region is a remarkable site of moderate to strong seismicity, where devastating earthquakes caused significant losses of lives and livelihood. In this article, we survey geology and geodynamics of the Caucasus and its surroundings; magmatism and heat flow; active tectonics and tectonic stresses caused by the collision and shortening; gravity and density models; and overview recent geodetic studies related to regional movements. The tectonic development of the Caucasus region in the Mesozoic-Cenozoic times as well as the underlying dynamics controlling its development are complicated processes. It is clear that the collision is responsible for a topographic uplift / inversion and for the formation of the fold-and-thrust belts of the Greater and Lesser Caucasus. Tectonic deformations in the region is influenced by the wedge-shaped rigid Arabian block indenting into the relatively mobile region and producing near N-S compressional stress and seismicity in the Caucasus. Regional seismicity is analysed with an attention to sub-crustal seismicity under the northern foothills of the Greater Caucasus, which origin is unclearwhether the seismicity associated with a descending oceanic crust or thinned continental crust. Recent seismic tomography studies are in favour of the detachment of a lithospheric root beneath the Lesser and Greater Caucasus. The knowledge of geodynamics, seismicity, and stress regime in the Caucasus region assists in an assessment of seismic hazard and risk. We look finally at existing gaps in the current knowledge and identify the problems, which may improve our understanding of the regional evolution, active tectonics, geodynamics, shallow and deeper seismicity, and surface manifestations of the lithosphere dynamics. Among the gaps are those related to uncertainties in regional geodynamic and tectonic evolution (e.g., continental collision and associated shortening and exhumation, lithosphere structure, deformation and strain-stress partitioning) and to the lack of comprehensive datasets (e.g., regional seismic catalogues, seismic, gravity and geodetic surveys).

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Section: Geology and Geodynamicsmentioning

confidence: 99%