Distributed neotectonic deformation in the Anatolides of Turkey: A palaeomagnetic analysis

Piper, J. D. A.; Gürsoy, Hali̇l; Tatar, Orhan; Beck, Myrl E.; Rao, A. T.; Koçbulut, Fikret; Mesci, B. Levent

doi:10.1016/j.tecto.2009.05.026

Cited by 76 publications

(35 citation statements)

References 83 publications

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“…East-west disorientations in the deep-sourced aeromagnetic anomalies of the Cappadocian region are determined at 30°in the counter clockwise direction in central Anatolia which is consistent with the mobilistic system (Storetvedt 2003). The mobilistic theory was also supported with the palaeomagnetic data (Gursoy et al 1997(Gursoy et al , 1998Piper et al 2010) andGPS measurements (McClusky et al 2000). Bilim and Ates (2007) investigated the effect of remanent magnetization and the rotations of geologic causative bodies in the northern central Anatolia with the application of a new method developed by them.…”

Section: Discussionmentioning

confidence: 65%

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

et al. 2012

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In this paper, aeromagnetic and gravity anomalies obtained from the General Directorate of Mineral Research and Exploration were subjected to upward continuation to 3 km from the ground surface to suppress shallow effects and to expose only regional, deep sources. Then, a reduction to pole (RTP) map of aeromagnetic anomalies was produced from the 3 km upward continued data. A sinuous boundary to the south of Turkey is observed in the RTP map that may indicate the suture zone between the Anatolides and African/Arabian Plates in the closure time of the Tethys Ocean. The sinuous boundary can be correlated with the recent palaeo-tectonic maps. The southern part of the sinuous boundary is quite different and less magnetic in comparison with the northern block. In addition, maxspots maps of the aeromagnetic and gravity anomalies were produced to find out and enhance the boundaries of tectonic units. Crustal thickness, recently calculated and mapped for the western Turkey, is also extended to the whole of Turkey, and the crustal thicknesses are correlated with the previous seismological findings and deep seismic sections. The average crustal thickness calculations using the gravity data are about 28 km along the coastal regions and increase up to 42 km through the Iranian border in the east of Turkey. Density and susceptibility values used as parameters for construction of two-dimensional (2D) gravity and magnetic models A. Ates were compiled in a table from different localities of Turkey. 2D models indicate that all of the anomalous masses are located in the upper crust, and this could be well correlated with the earthquakes which occurred at shallow depths.

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Section: Discussionmentioning

confidence: 65%

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

et al. 2012

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“…Such a larger-scale trigger might be found in a temporary increase of compressive stresses within the Anatolian plate, whose westward motion is resisted by the GreeceBalkan domain. This resistance induced firstly anticlockwise rotation of western Anatolia toward SW (Sengör and Yilmaz, 1981), probably in the last 2-3 My according to palaeomagnetic data (Piper et al, 2010), and possibly led to extension between a number of blocks behaving as broken slats in the intervening area (Taymaz et al, 1991;Yaltırak et al, 2012). Then, plate convergence caused the Eratosthenes seamount, rising more than 1 km above the oceanic crust of eastern Mediterranean, to collide with the Cyprus arc in the late Early Pleistocene, temporarily interrupting subduction and triggering compression of the Anatolian plate (Schattner, 2010).…”

Section: Geodynamic Meaning Of a Biga Peninsula Uplift Around 08 Mamentioning

confidence: 96%

“…The specific character of this episode results from the propagation of the NAFZ at the western tip of the Anatolian plate affected by complex block rotations (Piper et al, 2010;Yilmaz et al, 2010), and from the resulting interactions with the Aegean N-S extensional regime, whose persisting influence is underlined by the development of E-trending grabens (Gürer et al, 2006). Moreover, uplift persisted then under changing stress regimes, and namely through the early-to-mid Pleistocene tectonic transition noted by Schattner (2010) in the whole eastern Mediterranean realm and characterized in Anatolia and the Aegean Sea by a short-lived compressional phase around 1 Ma followed by renewed extension in a slightly changed direction.…”

Section: Neogene Geodynamic Evolution Of the Biga Peninsulamentioning

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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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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“…On the other hand, the central part of the NAFZ fault deformation has a standard component, because the fault is parallel to the Black Sea coastline. Additionally, geological evidence indicates compressive strain near the Ilgaz Mountains (Piper et al, 2010). The main offsets on the NAFZ are in the Pontide suture which is located close to the city of Erzincan (longitude E39•20') (Sengor et al, 1985), around the Sea of Marmara (Armijo et al, 1999), and in the western part of the central bend (HubertFerrari et al, 2002).…”

Section: Tectonic Settingsmentioning

confidence: 99%

Strain Rate Analysis on the Çankiri-Bingöl Segment of the North Anatolian Fault in Turkey

Yavaşoğlu¹

2015

Earth sci. res. j.

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The North Anatolian Fault Zone (NAFZ) is one of the most important fault zones of Turkey and the world. It has produced several high magnitude earthquakes that have resulted in massive loss of lives and resources. National and international research on the North Anatolian Fault zone that Turkey resides on have been realized to better understand and predict the earthquakes produced by it. This study focuses on the Çankırı -Bingöl segment of the NAFZ. The aim of this study is to calculate the strain and latent earthquake potential of the studied area. For this purpose, geodetic data coming from several individual projects have been merged. Strain values have been calculated from the combined data and regions on the fault zone, and strain accumulations have been presented graphically. After calculation, Çankırı, Amasya and Kelkit regions were analyzed. The compressional and extensional deformation has been shown in north and south part of Çankırı basin, respectively. Eastern adjacent area of the Çankırı basin, Amasya region, has the primary branch of the NAF and its subbranches. In the Amasya region, the deformation is mostly on the main branch and the earthquake potential has risen to it. The Kelkit Valley has complex structures and inhomogeneous dispersion. Southeastern and Northwestern part of the Kelkit Valley has varied deformation in micro scale. Consequently, the study results indicate that strain accumulation is concentrated on areas such as the Çankırı basin, Amasya region, and various areas in the Kelkit Valley from west to east. La Zona de la Falla de Anatolia del Norte (NAFZ, del inglés North Anatolian Fault Zone) es una de las zonas de fallas más importantes de Turquía y del mundo. Esta falla ha generado varios terremotos de gran magnitud que han resultado en pérdidas humanas y de recursos. La investigación nacional e internacional de la Zona de la Falla de Anatolia del Norte, que atraviesa Turquía, se ha realizado con el fin de un mejor entendimiento y predicción de los terremotos que allí se originan. Este análisis se enfoca en el segmento Çankırı-Bingöl de la NAFZ. El objetivo es calcular la tensión y el potencial de terremoto del área de estudio. Con este propósito se recopiló la información geodésica de varios proyectos individuales. Los valores de tensión se calcularon de la información combinada de las regiones que componen la zona de falla y se presentan gráficamente las acumulaciones de tensión. Tras el cálculo de estos valores se analizaron las regiones Çankırı, Amasya y Kelkit. La deformación de compresión y la de extensión aparecen al norte y al sur de la cuenca Çankırı, respectivamente. El área ubicada al Este de la cuenca Çankırı, la región de Amasya, posee la rama principal de la NAFZ y sus subdivisiones. En la región de Amasya la deformación se presenta en la rama principal de la NAFZ, donde se eleva el potencial de movimientos sísmicos. El valle de Kelkit tiene estructuras complejas y dispersión no homogénea. El sudeste y el noroeste del valle Kelkit muestran una deformación variada a ...

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Distributed neotectonic deformation in the Anatolides of Turkey: A palaeomagnetic analysis

Cited by 76 publications

References 83 publications

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

Crustal Structure of Turkey from Aeromagnetic, Gravity and Deep Seismic Reflection Data

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

Strain Rate Analysis on the Çankiri-Bingöl Segment of the North Anatolian Fault in Turkey

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