Akademik Veri Yönetim Sistemi
Environmental Geology, cilt.51, sa.3, ss.365-375, 2006 (SCI-Expanded)
The Beypazari granitoid in central Anatolia was emplaced during the Late Cretaceous and it is partly covered with Early Miocene-Quaternary sedimentary and volcanic units. Compression and tension regimes of the BeypazarI granitoid emplacing along the Sakarya River were evaluated considering the kinematical characteristics of discontinuities on granitoids, petrographic/geochemical works, formation of geothermal spring and irregularities in topographic structure. It was determined that the Beypazari granitoid was witnessed with NE-SW compressional stress and NW-SE extensional stress which resulted in the formation of the Kapullu normal fault with N55-72°E, 78°SE crossing the Kapullu spring site. There are also several other probable normal faults around this fault in the Sakarya River basin. The results of the geochemical studies reveal that SiO2, Na2O, Al2O3, CaO and K2O as a major oxide and As, Rb, Sr, Th and U as trace elements are decreased away from the Kapullu bath spring. On the other hand, the ratio of Fe2O3 and MgO as major oxide and Y as a trace element with the lost on ignition (LOI) are increased away from the Kapullu fault. Regard as the regional plate tectonism, there is a consistency between the direction of compression in the Beypazari granitoid and that developed by the southwesterly movement of the Anatolian plate. © 2006 Springer-Verlag.