Tectonic evolution of the Niksar and Tasova–Erbaa pull-apart basins, North Anatolian Fault Zone: their significance for the motion of the Anatolian block

Barka, Aykut; Akyüz, H. Serdar; Cohen, Harvey A.; Watchorn, F.

doi:10.1016/s0040-1951(00)00099-8

Cited by 102 publications

(80 citation statements)

References 23 publications

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“…Forming the western limb of a major N-S tectonic hinge line that changes the structural grain from NW to SW in the bending area (Yilmaz et al, 2010) and that thus potentially concentrates the deformation, the Biga Peninsula (and probably also the equally uplifted Balikesir Plateau to the east) would have accommodated a main part of this compressive component through increased uplift. Indeed, though this compression episode, documented also in central Anatolia by fault kinematic analyses (Barka et al, 2000;Over et al, 1997), was probably short-lived, the resulting temporary increase in uplift rate was sufficient to induce a wave or river incision that is still propagating within the regional drainage system, as revealed by our R/S R results. One may further hypothesize that the recent transfer and concentration of shearing in the narrower line of the northern branch of the NAFZ, along the northern edge of the peninsula, also responded to these momentarily changed stress conditions.…”

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

confidence: 61%

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: Geodynamic Meaning Of a Biga Peninsula Uplift Around 08 Masupporting

confidence: 61%

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

2013

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“…The younger age of some of the fault segments (e.g., the Kelkit valley segment was probably established when the Niksar pull-apart basin formed [Fraser, 2009]) may be associated with sections of higher frictional resistance on the fault plane, which, in conjunction with the high fault-normal stress, may explain the relatively erratic behavior (i.e., sometimes the whole 1939 rupture segment ruptures, sometimes only part of it ruptures) of the eastern section of the NAF over the last ∼1000 years. However, because there are multiple fault splays near the major pull-apart basins (e.g., Niksar and Erzincan basins [Barka et al, 2000;Barka and Gülen, 1989]) and older basins along the fault (e.g., Suşehri and Gölova basins [Koçyiğit, 1989;Koçyiğit, 1990]), there may be some switching that leads to bimodal SIETs (e.g., sites RSA, GUN, and YAY).…”

Section: Fault Behaviormentioning

confidence: 99%

Recent behavior of the North Anatolian Fault: Insights from an integrated paleoseismological data set

2010

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The North Anatolian Fault (NAF) is a right‐lateral plate boundary fault that arcs across northern Turkey for ∼1500 km. Almost the entire fault progressively ruptured in the 20th century, its cascading style indicating that stress from one fault rupture triggers fault rupture of adjacent segments. Using published paleoseismic investigations, this study integrates all of the existing information about the timing of paleoearthquakes on the NAF. Paleoseismic investigation data are compiled into a database, and for each site a Bayesian, ordering‐constrained age model is constructed in a consistent framework. Spatial variability of recurrence intervals suggests a spatial pattern in the behavior of earthquakes on the NAF that may correspond to the tectonic provinces within the Anatolian plate. In the west, the shear stress associated with the escaping Anatolian plate interplays with the tensile stress associated with the Aegean extensional province. Along this western transtensional section we recognize short recurrence intervals and switching between the furcated fault strands. The central section of the NAF is translational with little influence of fault‐normal stresses from other tectonic sources. This section tends to rupture in unison or close succession. The eastern section of the NAF is transpressional due to the compressional fault‐normal stress associated with the indenting Arabian plate. Along this section the recurrence intervals are bimodal, which we attribute to variable normal stress, although there are other possible causes.

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“…The first section runs from Kastamonu to Amasya, the second segment from Amasya to Erzincan, and the last part from Erzincan to Bingöl. Historical and instrumental records indicate that they are active (Ambraseys, 1970(Ambraseys, , 2009Barka, 1992Barka, , 1996Barka et al, 2000). Another important aspect of this region is the fault behavior.…”

Section: Introductionmentioning

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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Tectonic evolution of the Niksar and Tasova–Erbaa pull-apart basins, North Anatolian Fault Zone: their significance for the motion of the Anatolian block

Cited by 102 publications

References 23 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)

Recent behavior of the North Anatolian Fault: Insights from an integrated paleoseismological data set

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

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