NEOGENE PALEOMAGNETIC ANALYSIS OF NORTHWEST ANATOLIA

Date

2026-2-20

Author

İNCE, MERYEM DİLAN

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Northwestern Anatolia constitutes a key region for understanding the spatial and temporal evolution of Miocene deformation associated with distributed extension and transtensional tectonics. This study presents an integrated paleomagnetic and kinematic analysis of Miocene volcanic and sedimentary units exposed within selected Neogene basins of northwestern Anatolia, with the aim of quantifying vertical-axis rotations and their relationship to basin-scale deformation. New paleomagnetic results document systematically and temporally distinct vertical-axis rotations. Early Miocene units record consistent clockwise rotations, whereas middle to late Miocene units are characterized by counterclockwise rotations of generally larger magnitude. These rotations show clear spatial coherence within individual basins and between adjacent basins, indicating that they reflect regional deformation patterns rather than local or site-specific effects. Comparative analysis of NE-trending basins indicates that the Gördes Basin exhibits a rotational history comparable to that of the Akhisar and Bigadiç areas, characterized by similar rotation senses and timing. In contrast, the Demirci and Selendi basins define a distinct kinematic domain, internally consistent but clearly separated from the southern group in terms of rotation patterns and stress orientations. These results demonstrate that NE-trending basins in northwestern Anatolia did not evolve under a single, uniform tectonic regime, but instead record spatially heterogeneous basin development during the Miocene.

Subject Keywords

Paleomagnetism, Neogene vertical axis rotations, Northwest Anatolia, Miocene stratigraphy, NE-trending Neogene basins.

URI

https://hdl.handle.net/11511/118800

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Graduate School of Natural and Applied Sciences, Thesis