Metamorphic-magmatic evolution of the Uludağ massif

Date

2024-7-25

Author

Şahin, Gülen

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The objective of this study is to investigate the geological processes of metamorphic, and magmatic evolution of the Uludağ Massif units. The Uludağ Massif is located in the northwestern Anatolia and represents the basement of the Sakarya Zone. The Uludağ Massif is a metamorphic core complex bounded by the Bursa Fault in the north and the Soğukpınar Fault in the south. This research includes a comprehensive survey of the vicinity of the Bursa Fault, and the metamorphic and magmatic rocks crop out in four different regions, of the Uludağ Massif. The findings indicate that the magmatic and metamorphic rocks of the massif were occured in either an island arc or active continental margin environment. The metabasalt samples of the Kalabak Unit, the cover unit of the Uludağ Massif, were derived from the mid-ocean ridge basalt. The directional samples taken from the gneisses and metagranites, were examined for microstructural analyses and it was determined that the dominant deformation stress in the gneisses are in the N-S direction and in the metagranites in the NNE-SSW direction in the study area. U-Pb zircon studies provide evidence for tectono-thermal impact ages of 53 Ma, suggest that the massif was significantly uplifted in the region during this period. Metamorphism ages ranging from 32.03 to 35.53 Ma were detected in metagranites, whereas crystallisation ages ranging from 29.53 to 47.87 Ma were reported in granitic rocks. The Uludağ Granites show geochemistry characteristic of A-type granite, while the Kapıdağ Granites display geochemistry characteristic of I-S type granite.

Subject Keywords

Geochemistry, Sakarya Zone, Tectonics, Uludağ Massif, U-Pb zircon

URI

https://hdl.handle.net/11511/110649

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Graduate School of Natural and Applied Sciences, Thesis