Paleomagnetism of the Miocene Soma basin and its structural implications on the central sector of a crustal-scale transfer zone in western Anatolia (Turkey)

Westerweel, Jan
Langereis, Cornelis G.
Kaymakcı, Nuretdin
The Izmir-Balikesir Transfer Zone (IBTZ) is a crustal-scale major tectonic feature in western Anatolia accommodating differential extension between the Menderes (MCC) and Cycladic (CCC) core complexes. The kinematics and evolution of the southern part of the IBTZ are well constrained, but its northern continuation remains unstudied. This part is crucial in understanding the complete evolution of western Anatolian tectonics, as well as a possible link between the IBTZ and North Anatolian Fault Zone (NAFZ). In this study, new and extensive paleomagnetic, structural, and stratigraphic data were collected from the Soma basin. These results show that the basin evolved as a part of the IBTZ, including two separate rotational phases. During the first (middle Miocene) phase, deformation was characterized by transcurrent tectonics and associated block rotations as much as similar to 50 degrees clockwise, during which the IBTZ evolved as a wide dextral shear zone. During the second (late Miocene - recent) phase, the mode of deformation in the Aegean region switched from localized to distributed extension, related to the acceleration of the tearing-off of the African Oceanic slab below the Aegean region. This led to the narrowing of the IBTZ as a discrete brittle shear around the Soma basin, manifested by decoupling of dextral strike-slip and normal faulting. In this period, the Soma basin underwent around -21 degrees counter-clockwise rotation. Based on our new results, the IBTZ extends further to the north and possibly interacts with the southern branch of the NAFZ since the late Miocene.


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Süzen, Mehmet Lütfi; Rojay, B (Elsevier BV, 2006-03-01)
This study investigates the origin and regional tectonic implications of high-altitude Plio (?)-Quaternary fluvial deposits developed over the Bozdak horst which is an important structural element within the horst-graben system of western Anatolia, Turkey. A total of 23 deposits occur near the modem drainage divide comprising fluvial to occasionally lacustrine deposits. The deposits are all elongated in N-S direction with a width/length ratio of 1/10. The largest of them is of 13 km in length with a maximum...
Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes core complex
UZEL, BORA; Langereis, Cornelis G.; Kaymakcı, Nuretdin; SÖZBİLİR, HASAN; ÖZKAYMAK, ÇAĞLAR; Ozkaptan, Murat (2015-03-15)
Within the Aegean extensional system, the izmir-Balikesir Transfer Zone (IBTZ) is a crucial element in the late Cenozoic evolution of western Anatolia since it accommodates the differential deformation between the Cycladic and the Menderes metamorphic core complexes. Here, we determine the rotational history of western Anatolia using new paleomagnetic data from 87 sites in Miocene volcano-sedimentary rocks to better understand the role of the IBTZ. Our results reveal two discrete and opposite major rotation...
Kinematic and thermal evolution of the Haymana Basin, a fore-arc to foreland basin in Central Anatolia (Turkey)
Gülyüz, Erhan; Özkaptan, Murat; Kaymakcı, Nuretdin; Persano, Cristina; Stuart, Finlay M. (Elsevier BV, 2019-09-05)
Gondwana (Tauride/kirsehir blocks) and Eurasia (Pontides) derived continental blocks delimit the Haymana basin, central Turkey, to the south and the north, respectively. The boundaries of these blocks define the IzmirAnkara-Erzincan and Intra-Tauride Suture zones which are straddled by a number of Late Cretaceous to Oligocene marine to continental basins. The Haymana Basin is located at the junction of the IAESZ and ITSZ and comprises Upper Cretaceous to Middle Eocene basin infill deposited in response to t...
Age and kinematics of the Burdur Basin: Inferences for the existence of the Fethiye Burdur Fault Zone in SW Anatolia (Turkey)
ÖZKAPTAN, MURAT; Kaymakcı, Nuretdin; Langereis, Cor G.; Gulyuz, Erhan; Özacar, Atilla Arda; UZEL, BORA; SÖZBİLİR, HASAN (Elsevier BV, 2018-10-02)
The Burdur Basin is a late Miocene to Pliocene fluvio-lacustrine basin in SW Anatolia. It is developed within the postulated Fethiye-Burdur Fault Zone, which was argued to be a sinistral strike-slip fault zone developed in response to propagation of the Pliny-Strabo STEP fault into SW Anatolia (Turkey). In order to assess the presence and tectonic characteristics of the fault zone, we conducted a paleomagnetic study in the Burdur basin that involved rock magnetic experiments, Anisotropy of Magnetic Suscepti...
Pattern of normal faulting in the Gediz Graben, SW Turkey
Ciftci, N. Bozkurt; Bozkurt, Erdin (Elsevier BV, 2009-07-20)
Hanging-wall deformation of the fault systems controlling the southern margin of the Gediz Graben were investigated separately within the Plio-Quaternary and Neogene (predominantly Miocene) deposits of the graben fill. Fault styles observed in both packages share many similarities in terms of geometry and comprise conjugate fault sets that show clustering of strike orientations predominantly around WNW-ESE but also SW-NE and NW-SE directions. The main difference between the two units is observable in terms ...
Citation Formats
J. Westerweel, B. UZEL, C. G. Langereis, N. Kaymakcı, and H. SÖZBİLİR, “Paleomagnetism of the Miocene Soma basin and its structural implications on the central sector of a crustal-scale transfer zone in western Anatolia (Turkey),” JOURNAL OF ASIAN EARTH SCIENCES, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: