Morphotectonic evidence from the southern branch of the North Anatolian Fault (NAF) and basins of the south Marmara sub-region, NW Turkey

AbstractIn this study, we show that the southern branch of the North Anatolian Fault has been active since Late Pliocene time and that evidence of activity is supported by geological and seismological data. The southern branch of the North Anatolian Fault consists of four segments from west to east: Yenice–Gönen, Manyas–Mustafakemalpaşa, Uluabat and Bursa. These faults delimit the Bursa–Gönen Depression, with the Bandırma–Mudanya Uplift to the north and Uludağ–Sularya Uplift to the south. The Bursa–Gönen Depression includes Upper Pliocene to Recent sediments that thicken to the south, suggesting a deposition pattern under active fault control. Study of fault kinematics suggests that the Bursa–Gönen Depression started as a small pull-apart basin during Late Pliocene time, and then evolved to a large depression. The faults delimiting this depression are still active and capable of producing future earthquakes.

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Kinematic analysis and palaeoseismology of the Edremit Fault Zone: evidence for past earthquakes in the southern branch of the North Anatolian Fault Zone, Biga Peninsula, NW Turkey

Geodinamica Acta ◽

10.1080/09853111.2016.1175294 ◽

2016 ◽

Vol 28 (4) ◽

pp. 273-294 ◽

Cited By ~ 12

Author(s):

Hasan Sözbilir ◽

Ökmen Sümer ◽

Çağlar Özkaymak ◽

Bora Uzel ◽

Tayfun Güler ◽

...

Keyword(s):

Fault Zone ◽

Kinematic Analysis ◽

North Anatolian Fault ◽

North Anatolian Fault Zone ◽

Biga Peninsula ◽

The North ◽

Nw Turkey ◽

Southern Branch

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Segmentation and Holocene Behavior of the Middle Strand of the North Anatolian Fault (NW Turkey)

10.1002/essoar.10506809.1 ◽

2021 ◽

Author(s):

Yacine Benjelloun ◽

Julia De Sigoyer ◽

Stéphane Garambois ◽

Julien Carcaillet ◽

Yann Klinger

Keyword(s):

North Anatolian Fault ◽

The North ◽

Nw Turkey

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Active subaquatic fault segments in Lake Iznik along the middle strand of the North Anatolian Fault, NW Turkey

Tectonics ◽

10.1029/2020tc006404 ◽

2020 ◽

Author(s):

R. Gastineau ◽

J. Sigoyer ◽

P. Sabatier ◽

S. C. Fabbri ◽

F. S. Anselmetti ◽

...

Keyword(s):

North Anatolian Fault ◽

The North ◽

Nw Turkey

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Late Miocene transcurrent tectonics in NW Turkey: evidence from palaeomagnetism and 40Ar–39Ar dating of alkaline volcanic rocks

Geological Magazine ◽

10.1017/s0016756806003074 ◽

2007 ◽

Vol 144 (2) ◽

pp. 379-392 ◽

Cited By ~ 46

Author(s):

N. KAYMAKCI ◽

E. ALDANMAZ ◽

C. LANGEREIS ◽

T. L. SPELL ◽

O. F. GURER ◽

...

Keyword(s):

Fault Zone ◽

Late Miocene ◽

Active Faults ◽

Volcanic Rocks ◽

Volcanic Eruptions ◽

North Anatolian Fault ◽

Lava Flows ◽

North Anatolian Fault Zone ◽

The North ◽

Nw Turkey

A number of intra-continental alkaline volcanic sequences in NW Turkey were emplaced along localized extensional gaps within dextral strike-slip fault zones prior to the initiation of the North Anatolian Fault Zone. This study presents new palaeomagnetic and 40Ar–39Ar geochronological results from the lava flows of NW Turkey as a contribution towards understanding the Neogene–Quaternary tectonic evolution of the region and possible roles of block rotations in the kinematic history of the region. 40Ar–39Ar analyses of basalt groundmass indicate that the major volume of alkaline lavas of NW Turkey spans about 4 million years of episodic volcanic activity. Palaeomagnetic results reveal clockwise rotations as high as 73° in Thrace and 33° anticlockwise rotations in the Biga Peninsula. Movement of some of the faults delimiting the areas of lava flows and the timing of volcanic eruptions are both older than the initiation age of the North Anatolian Fault Zone, implying that the region experienced transcurrent tectonics during Late Miocene to Pliocene times and that some of the presently active faults in the region are reactivated pre-existing structures.

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