The geodynamics of the Aegean and Anatolia: introduction

Taymaz, Tuncay; Yïlmaz, Yücel; Dilek, Yıldırım

doi:10.1144/sp291.1

Cited by 124 publications

(89 citation statements)

References 144 publications

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“…Squeezed between the converging African and Eurasian plates, the Eastern Mediterranean region is an area of active geodynamics where ongoing crustal deformation and high seismicity result from complex interactions between competing forces (Taymaz et al, 2007). Since the Late Cretaceous closure of the Neotethyan basins, its evolution is governed by northward subduction of the African plate along the Hellenic trench in the west and continental collision between Arabia and Turkey in the east (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Northward motion of the Arabian indenter led to the formation of the Caucasus orogen and caused extrusion of the Anatolian microplate, whose westward escape, accompanied by counter-clockwise rotation, is guided by the North and East Anatolian strike-slip faults. In the same time, in response to slab retreat and, possibly, post-orogenic collapse (Taymaz et al, 2007, and references therein), extension dominated much of the Cenozoic evolution in the Aegean Sea and western Turkey and is still prevailing in the whole area, from the Corinth rift (Bell et al, 2009;Floyd et al, 2010) to the horsts and grabens of western Turkey (Çiftçi and Bozkurt, 2009;Kurtuluş et al, 2009;Süzen et al, 2006). GPS velocities (Reilinger et al, 2006) show that back-arc extension in the Aegean is currently more rapid than the westward motion of Anatolia, thus accommodating the latter's displacement and still allowing local graben formation.…”

Section: Introductionmentioning

confidence: 99%

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Morphometric age estimate of the last phase of accelerated uplift in the Kazdag area (Biga Peninsula, NW Turkey)

2013

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Keywords:Aegean domain North Anatolian Fault Zone Morphometry R/S R index Drainage network Uplift While the Plio-Quaternary uplift of the Kazdag mountain range (Biga Peninsula, NW Turkey) is generally acknowledged, little is known about its detailed timing. Partly because of this lack of data, the cause of this uplift phase is also debated, being associated either to back-arc extension in the rear of the Hellenic subduction zone, to transpression along the northern edge of the west-moving Anatolian microplate, or to extension driven by gravitational collapse. Here, we perform a morphometric study of the fluvial landscape at the scale of the Biga Peninsula, coupling the recently developed R/S R analysis of the drainage network with concavity and steepness measures of a set of 29 rivers of all sizes. While the dependence of profile concavity on basin size confirms that the landscape of the peninsula is still in a transient state, the spatial distribution of profile steepness values characterized by higher values for streams flowing down from the Kazdag massif shows that the latter undergoes higher uplift rates than the rest of the peninsula. We obtain a S R value of 0.324 ± 0.035 that, according to the relation established by Demoulin (2012), yields an age range of 0.5-1.3 Ma and a most probable value of 0.8 Ma for the time of the last tectonic perturbation in the region. In agreement with the analysis of knickpoint migration in a subset of rivers, this suggests that a pulse of uplift occurred at that time and, corroborated by sparse published observations in the Bayramiç and Çanakkale depressions, that the peninsula was uplifted as a whole from that time. This uplift pulse might have been caused by transient compressive conditions in the Anatolian plate when the Eratosthenes seamount came to subduct beneath the Cyprus arc around the early-to-mid Pleistocene transition (Schattner, 2010).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphometric age estimate of the last phase of accelerated uplift in the Kazdag area (Biga Peninsula, NW Turkey)

2013

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“…The fault trace of the E-W-trending NAF is divided into two branches around Düzce city towards the north-west of Turkey (Özalp, Emre, & Doğan, 2013;Şengör & Barka, 1992). The northern branch, which generated İzmit (M w : 7.4) and Düzce (M w : 7.2) earthquakes in 1999 (Taymaz, Yılmaz, & Dilek, 2007), passes through the SapancaKocaeli corridor and enters into the Marmara Sea. The southern branch, which generated the Yenice (M w : 7.2) (McKenzie, 1972) and Manyas (M S : 6.8) (Taymaz, Jackson, & Mc Kenzie, 1991) earthquakes in 1953and 1964, is represented by many parallel/subparallel dextral strike slip faults that lie between the İznik and Aegean Sea along the Southern Marmara Region (SMR).…”

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confidence: 99%

Palaeoseismology of the Havran-Balıkesir Fault Zone: evidence for past earthquakes in the strike-slip-dominated contractional deformation along the southern branches of the North Anatolian fault in northwest Turkey

et al. 2016

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The Havran-Balıkesir Fault Zone (HBFZ) is one of the major active structures of the Southern Marmara Region, which has been shaped by the southern branch of North Anatolian fault since the Pliocene. HBFZ is a 10-12 km wide, 120 km long, right-lateral strike-slip fault zone that consists of two ENE-striking main faults, namely, the Havran-Balya and Balıkesir faults. The 90-km-long Havran-Balya fault exhibits right-stepping en echelon geometry and is made up of (1) Havran, (2) Osmanlar, (3) Turplu and (4) Ovacık fault segments. On the eastern part, the 70-km-long Balıkesir fault is divided into two fault segments; (1) Gökçeyazı and (2) Kepsut. We estimated the long-term slip rate between 3.59 and 3.78 mm/yr using river offset. The Kepsut, Gökçeyazı and Ovacık fault segments are capable of generating an earthquake with a moment magnitude of up to 7.2. Detailed palaeoseismological studies show that the HBFZ is responsible for some surface faulting earthquakes with an average recurrence interval of 1000-2000 years during the late Holocene. Considering the fact that there was no evidence of a surface-ruptured earthquake for 2000 years, it can be stated that there is a seismic gap on the Gökçeyazı fault segment.

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“…The northward motion of the Arabian plate relative to Eurasia causes lateral movement and rotation of this Anatolian plate. While the southern Aegean Sea is moving southwest, much of the Anatolian region is moving westward relative to Eurasia along two fault zones: the east and the north Anatolian fault zones into the Aegean domain [Armijo et al, 1999;Taymaz et al, 2007]. These strike-slip zones determine the boundaries of the Aegean-Anatolian microplate that is moving west-southwestwards overriding the subducting oceanic lithosphere of the Eastern Mediterranean Sea [Kocyigit and Deveci, 2007].…”

Section: Seismotectonic Of the Regionmentioning

confidence: 99%

Investigation of local site responses at the Bodrum Peninsula (Southwest of Turkey) using the mainshock and aftershocks of the 20 July 2017 Mw6.6 Bodrum-Kos earthquake

Alçık

2018

Annals of Geophysics

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The geodynamics of the Aegean and Anatolia: introduction

Cited by 124 publications

References 144 publications

Morphometric age estimate of the last phase of accelerated uplift in the Kazdag area (Biga Peninsula, NW Turkey)

Morphometric age estimate of the last phase of accelerated uplift in the Kazdag area (Biga Peninsula, NW Turkey)

Palaeoseismology of the Havran-Balıkesir Fault Zone: evidence for past earthquakes in the strike-slip-dominated contractional deformation along the southern branches of the North Anatolian fault in northwest Turkey

Investigation of local site responses at the Bodrum Peninsula (Southwest of Turkey) using the mainshock and aftershocks of the 20 July 2017 Mw6.6 Bodrum-Kos earthquake

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