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

Download

index.pdf

Date

2007-2-9

Author

KAYMAKCI, N.
Kaymakcı, Nuretdin
LANGEREIS, C.
SPELL, T. L.
GURER, O. F.
ZANETTI, K. A.

Metadata

Show full item record

Item Usage Stats

532
views

298
downloads

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.

Subject Keywords

Palaeomagnetism, Block rotation, 40Ar–39Ar ages, Alkaline volcanism, NW Turkey, Strikeslip faulting, North Anatolian Fault Zone

URI

https://hdl.handle.net/11511/28480

Journal

Geological Magazine

DOI

https://doi.org/10.1017/s0016756806003074

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Late quaternary seismic stratigraphy and active faults of the Gulf of Izmit (NE Marmara Sea) OKYAR, Mahmut; Pinar, Ali; Tezcan, Devrim; Kamaci, Zueheyr (2008-06-01) The Upper Quaternary seismic stratigraphy and active faults of the Gulf of Izmit were investigated by means of high-resolution shallow seismic profiling data in the source region of 1999 Izmit earthquake. High-resolution seismic reflection data correlated with borehole data indicate that the stratigraphy of Izmit Bay consists of three distinct depositional sequences formed in response to middle Pleistocene-Holocene sea-level changes. Reflector R, separating the pre-Holocene sequences (1 and 2) from the Holo...
Helium isotope variations in Turkey: relationship to tectonics, volcanism and recent seismic activities Güleç, Nilgün Türkan; Mutlu, H (2002-07-01) The distribution of helium isotope ratios in the various tectonic provinces of Turkey is examined through a synthesis of previously published data and the results of a recent survey along the North Anatolian Fault Zone (NAFZ) following the catastrophic 1999 earthquakes. The R/R-A values (where R = sample He-3/He-4 and RA = air He-3/He-4) cover a wide range from 0.05 to 7.87, and the mantle-derived helium is clearly identified in most locations, The mantle-derived component is high (> 50% of total He) in (a)...
Identification of morphometric properties of basins located on western part of NAFZ Sarp, Gülcan; Toprak, Vedat; Düzgün, H. Şebnem; Department of Geodetic and Geographical Information Technologies (2012) This study aims to investigate tectonic activity levels and development stages of the tectonic and hydrologic basin areas located on western part of the main trace of the North Anatolian Fault Zone (NAFZ) using quantitative measurement techniques. The basins investigated are Bolu, Yeniçağa, Dörtdivan, Çerkes, Ilgaz and Tosya. The methodology includes application of six morphometric indices (Basin Shape, Hypsometric curve and Hypsometric Integral, Sinuosity of Mountain Fronts, Stream Length Gradient Index, V...
3D-architecture and Neogene evolution of the Malatya Basin: Inferences for the kinematics of the Malatya and Ovacik fault zones Kaymakcı, Nuretdin; Ertepinar, Pinar (2006-01-01) The 3D-architecture of the Malatya Basin was studied using remote sensing, seismic interpretation, and palaeostress analysis in the context of the Malatya-Ovacik fault zone. The results indicate that the Ovacik and Malatya fault zones are not different segments of a single 'so called' Malatya-Ovacik fault zone; rather, they are two different fault zones that have operated independently. In addition, the Ovacik fault zone is delimited in the west by the Malatya fault zone, which extends farther north from th...
3D-Architecture and Neogene Evolution of the Malatya Basin: Inferences for the Kinematics of the Malatya and Ovacık Fault Zones İnceöz, Murat; Pınar, Ertepinar; Kaymakcı, Nuretdin (2006-01-01) The 3D-architecture of the Malatya Basin was studied using remote sensing, seismic interpretation, and palaeostress analysis in the context of the Malatya-Ovacık fault zone. The results indicate that the Ovacık and Malatya fault zones are not different segments of a single 'so called' Malatya-Ovacık fault zone; rather, they are two different fault zones that have operated independently. In addition, the Ovacık fault zone is delimited in the west by the Malatya fault zone, which extends farther north from th...

Citation Formats

N. KAYMAKCI, N. Kaymakcı, C. LANGEREIS, T. L. SPELL, O. F. GURER, and K. A. ZANETTI, “Late Miocene transcurrent tectonics in NW Turkey: evidence from palaeomagnetism and 40Ar–39Ar dating of alkaline volcanic rocks,” Geological Magazine, pp. 379–392, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28480.