JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, cilt.198, ss.112-128, 2010 (SCI-Expanded)
In Western Anatolia early-middle Miocene post-collisional volcanism is represented by K nch volcanic rocks including calc alkaline high-K calc-alkaline shoshonitic and ultrapotasstc products Low-SIO2 and relatively high-MgO mafic volcanic rocks in the region are represented by high-K volcanic rocks (HKVR) in the west where strike-slip tectonics related to the Izmir-Balikesir Transfer Zone dominates while shoshonitic and ultrapotassic volcanic rocks (SHVR and UKVR) occur in the eastern part of the region where mid-crustal units were exhumed along detachment faults during orogenic collapse All three rock groups have nearly identical Sr-Nd Isotope ratios but the SHVR and UKVR are more enriched in incompatible trace elements relative to the HKVR. Comparison of the geochemical characteristics of the most primitive lavas (SiO2<55 wt % Mg#>65 and MgO>6 wt %) provides an important tool in discussing the origin and evolution of the K-rich magmatic activity in this post-orogenic setting