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Post-paleogene deformation in northernmost tip of Tuzgolu fault zone (Pasadag, South of Ankara), Turkey

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2009
Çeliker, G. Dilara
The research area is located to the northern tip of Tuzgolu fault zone in the junction of neotectonic structures, namely, Eskişehir-Cihanbeyli, Sungurlu-Kırıkkale and Tuzgölü fault zones (Central Anatolia). The study is carried out in Paleocene sequences of Paşadağ group on the structural analysis of bed, gash vein, fault and fault plane slippage data. The method of study based on i) the rose and stereo analysis of the planar structure (beds, gash veins and faults) on ROCKWORKS 2009 software and ii) on fault slip analysis on ANGELIER 1979 software. The bed analyses done on 605 measurements manifest N10°-20°E bedding attitude. The analysis done on 64 gash veins shows a general trend of NNE-SSW (N15°E). The final analysis done on 160 fault planes pointed out a general trend of NNWSSE (N20°W). Analysis based on the fault plane slip data manifest two stages of faulting under almost NE-SW compression during post-Paleocene – pre-Miocene period and one stage of faulting under WNW-ESE extension most probably during post-Miocene. To conclude, the Paleocene sequences are deformed continuously under WNW-ESE directed compression which is followed by a NE-SW to N-S compression resulted in the development of a reverse to dextral strike slip faulting during post-Paleocene – pre-Miocene period.