Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes core complex

Langereis, Cornelis G.
Kaymakcı, Nuretdin
Ozkaptan, Murat
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 rotational phases during the Miocene. The first phase is derived from early Miocene volcanic, sedimentary and granitic rocks and is controlled by detachment and strike-slip faults. It is characterized by an average (net) 23 +/- 6 degrees clockwise (CW) rotation within the Diaz since the early Miocene. Our new data from the Menderes part on the other hand show an average -23 +/- 10 degrees counter-clockwise (CCW) rotation. The data from the Cycladic part show no significant (net) rotation since the early Miocene. The second phase is derived from middle-late Miocene volcanic and sedimentary rocks and is controlled by high-angle normal and strike-slip faults. The rotations from this phase show a very consistent pattern of -22 +/- 11 degrees CCW within the IBTZ, while now the Menderes part shows an average CW rotation of 25 +/- 14 degrees.


Structural evidence for strike-slip deformation in the Izmir-Balikesir transfer zone and consequences for late Cenozoic evolution of western Anatolia (Turkey)
UZEL, BORA; SÖZBİLİR, HASAN; Ozkaymak, Caglar; Kaymakcı, Nuretdin; Langereis, Cornelis G. (2013-04-01)
The Izmir-Balikesir transfer zone (IBTZ) is a recently recognized strike-slip dominated shear zone that accommodates the differential deformation between the Cycladic and Menderes core complexes within the Aegean Extensional System. Here, we present new structural and kinematic data obtained from field observations and 1/25,000 scale mapping of Miocene to Recent units within the IBTZ around Izmir Bay. The results point out that the IBTZ is a transtensional brittle shear zone that affects the pre-Neogene bas...
Paleomagnetic rotations in the Late Miocene sequence from the Cankiri Basin (Central Anatolia, Turkey): the role of strike-slip tectonics
Lucifora, Stella; Cifelli, Francesca; Rojay, Fuat Bora; Mattei, Massimo (2013-01-01)
In this paper, new paleomagnetic and anisotropy of magnetic susceptibility (AMS) data from Miocene continental units of the Cankiri Basin are presented, with the main goal of providing additional constraints on its deformational and rotational history during the Late Cenozoic. AMS data indicate a tectonic origin for the magnetic fabric, suggesting that Upper Miocene units were still involved in the deformation processes. Paleomagnetic data show that tectonic rotations in the Cankiri Basin do not show a symm...
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; UZEL, BORA; Langereis, Cornelis G.; Kaymakcı, Nuretdin; SÖZBİLİR, HASAN (Elsevier BV, 2020-05-15)
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). I...
Paleomagnetic evidence for upper plate response to a STEP fault, SW Anatolia
Kaymakcı, Nuretdin; ÖZKAPTAN, MURAT; Özacar, Atilla Arda; UZEL, BORA; SÖZBİLİR, HASAN (Elsevier BV, 2018-09-15)
Pliny-Strabo Trench is a Subduction Transform-Edge Propagator (STEP) Fault developed on the northern edge of the subducted African Oceanic Lithosphere. It connects the Aegean and Cyprian trenches in the Eastern Mediterranean convergent system. Although, deep geometry of the STEP fault and associated slab tear in mantle are imaged, its shallow vertical and lateral continuation in the crust and impact on the over-riding plate are still unknown. Thus, we have studied SW Anatolia, the candidate site where this ...
New age data from the tectonostratigraphic units of the Istranca "Massif" in NW Turkey: a correlation with SE Bulgaria
Bedi, Yavuz; Vasilev, Emil; Dabovski, Christo; Ergen, Ali; OKUYUCU, CENGİZ; Dogan, Adil; TEKİN, UĞUR KAĞAN; Ivanova, Daria; Boncheva, Iliana; Lakova, Iskra; Sachanski, Valeri; Kuscu, Ismail; Tuncay, Ercan; Demiray, D. Gulnur; Soycan, Havva; Göncüoğlu, Mehmet Cemal (2013-8-01)
The Istranca Crystalline Complex in NW Anatolia and SE Bulgaria includes structural units that differ in lithostratigraphy, metamorphism, age and structural position. They are collectively named as the "Istranca nappes" comprising from bottom to top the Sarpdere, Mahyadag. and Dogankoy Nappes. The Sarpdere Nappe consists of Lower Triassic arkosic metasandstones with slate interlayers, followed by Middle to Upper Triassic carbonates and an alternation of Upper Triassic clastics and carbonates. The Mahyada. g...
Citation Formats
B. UZEL, C. G. Langereis, N. Kaymakcı, H. SÖZBİLİR, Ç. ÖZKAYMAK, and M. Ozkaptan, “Paleomagnetic evidence for an inverse rotation history of Western Anatolia during the exhumation of Menderes core complex,” EARTH AND PLANETARY SCIENCE LETTERS, pp. 108–125, 2015, Accessed: 00, 2020. [Online]. Available: