Tectonics of the Caucasus and adjoining regions: implications for the evolution of the Tethys ocean

Adamia, Shota; Chkhotua, Tamar; Kekelia, M.; Lordkipanidze, M.; Shavishvili, I.; Zakariadze, G. S.

doi:10.1016/0191-8141(81)90043-2

Cited by 177 publications

(106 citation statements)

References 8 publications

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“…The tectonic history of the Zagros can be divided into four main stages (e.g. Stöcklin, 1968Stöcklin, , 1974Stöcklin, , 1977Adamia et al 1981;Berberian & King, 1981;Koop & Stoneley, 1982;Sengor, 1990;Beydoun, 1991;Beydoun, Clarke & Stoneley, 1992;Sepehr & Cosgrove, 2004):…”

Section: Geological Settingmentioning

confidence: 99%

Neogene sediments and modern depositional environments of the Zagros foreland basin system

et al. 2011

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-A sedimentological investigation of the Neogene deposits of the Zagros foreland basin in SW Iran reveals a continuous and largely gradational passage from supratidal and sabkha sediments at the base (represented by the Gachsaran Formation) to carbonates and marine marls (Mishan Formation with basal Guri carbonate member) followed by coastal plain and meandering river deposits (Agha Jari Formation) and finally to braided river gravel sheets (Bakhtyari Formation). This vertical succession is interpreted to represent the southward migration of foreland basin depozones (from distal foredeep and foredeep to distal wedge-top and proximal wedge-top, respectively) as the Zagros fold-thrust belt migrated progressively southward towards the Arabian foreland. This vertical succession bears a striking similarity to modern depositional environments and sedimentary deposits observed in the Zagros region today, where one passes from mainly braided rivers in the Zagros Mountains to meandering rivers close to the coast, to shallow marine clastic sediments along the northern part of the Persian Gulf and finally to carbonate ramp and sabkha deposits along the southeastern coast of the Persian Gulf. This link between the Neogene succession and the modern-day depositional environments strongly suggests that the major Neogene formations of the Zagros foreland basin are strongly diachronous (as shown recently by others) and have active modern-day equivalents.

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Section: Geological Settingmentioning

confidence: 99%

Neogene sediments and modern depositional environments of the Zagros foreland basin system

et al. 2011

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“…The Mesozoic ophiolites of the Lesser Caucasus belong to the Tethyan ophiolitic suture zone (Knipper 1975;Adamia et al 1981;Zakariadze et al 1983;Knipper et al 1986) (Fig. 1).…”

mentioning

confidence: 99%

“…1). Consequently the Lesser Caucasus mountain belt recorded Mesozoic and Cenozoic geodynamic evolutions related to the closure of the Northern Neotethys ocean (Sengör & Yilmaz 1981;Adamia et al 1981;Dercourt et al 1986;Ricou 1994;Nikishin et al 1998;Yilmaz et al 2000;Stampfi et al 2001;Robertson 2002;Golonka 2004). In this context, the NW -SE trending Sevan-Akera suture zone extends on nearly 400 km, north of the Sevan Lake from Amassia to the Nagorno-Karabagh region.…”

mentioning

confidence: 99%

Subductions, obduction and collision in the Lesser Caucasus (Armenia, Azerbaijan, Georgia), new insights

et al. 2010

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In the Lesser Caucasus three main domains are distinguished from SW to NE: (1) the autochthonous South Armenian Block (SAB), a Gondwana-derived terrane; (2) the ophiolitic Sevan-Akera suture zone; and (3) the Eurasian plate. Based on our field work, new stratigraphical, petrological, geochemical and geochronological data combined with previous data we present new insights on the subduction, obduction and collision processes recorded in the Lesser Caucasus. Two subductions are clearly identified, one related to the Neotethys subduction beneath the Eurasian margin and one intra-oceanic (SSZ) responsible for the opening of a back-arc basin which corresponds to the ophiolites of the Lesser Caucasus. The obduction occurred during the Late Coniacian to Santonian and is responsible for the widespread ophiolitic nappe outcrop in front of the suture zone. Following the subduction of oceanic lithosphere remnants under Eurasia, the collision of the SAB with Eurasia started during the Paleocene, producing 1) folding of ophiolites, arc and Upper Cretaceous formations (Transcaucasus massif to Karabakh); 2) thrusting toward SW; and 3) a foreland basin in front of the belt. Upper-Middle Eocene series unconformably cover the three domains. From Eocene to Miocene as a result of the Arabian plate collision with the SAB to the South, southward propagation of shortening featured by folding and thrusting occurred all along the belt. These deformations are sealed by a thick sequence of unconformable Miocene to Quaternary clastic and volcanic rocks of debated origin.

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“…In the Cri mea Ba sin, this de for ma tion took place in close re la tion with the begining of the clo sure of the Neo-Tethys Ocean (Kazmin et al, 2000;Golonka, 2004). How ever, there was also con se quent Alpine de for ma tion (dur ing the Paleogene), re lated to the Ara bia-Eur asia con ver gence and to the evo - lu tion of the Neo-Tethys (Bocaletti et al, 1974;Letouzey et al, 1977;Adamia et al, 1981;Zonen shain and Le Pichon, 1986). As far as the polyphase struc tural evo lu tion of the Cri mea is con cerned, there is some con tro versy about the ma jor structures, es pe cially re lated to the vergence of thrust sheets and the ages of their de vel op ment.…”

Section: Introductionmentioning

confidence: 99%

The position and age of flysch deposits in the Crimean Mountains (Southern Ukraine).

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et al. 2017

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Tectonics of the Caucasus and adjoining regions: implications for the evolution of the Tethys ocean

Cited by 177 publications

References 8 publications

Neogene sediments and modern depositional environments of the Zagros foreland basin system

Neogene sediments and modern depositional environments of the Zagros foreland basin system

Subductions, obduction and collision in the Lesser Caucasus (Armenia, Azerbaijan, Georgia), new insights

The position and age of flysch deposits in the Crimean Mountains (Southern Ukraine).

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