Original paper

Geochemistry and petrogenesis of the Late Paleozoic magmatism in the Sakarya Zone (NW Turkey)

İlbeyli, Nurdane; Demirbilek, Mehmet; Kibici, Yaşar


A petrological and geochemical study was carried out for the Late Paleozoic Söğüt pluton in the central Sakarya zone in order to constrain its petrogenesis and tectonic setting. The pluton is made up of quartz diorite, granodiorite and granite. These rock types are composed of plagioclase, K-feldspar, quartz, biotite, hornblende and Fe-Ti oxides. The plutonic rocks are medium- to high-K showing I- to S-type granitic characteristics. These rock types are defined by enrichment in LILE, LREE and relative depletion in HFSE indicating arc-related origin. Geochemical data demonstrate that the Söğüt rocks originated as partial melts of a basic crustal source that experienced hybridization and also fractional crystallization during magma ascent.


fractionationhybridized lower crustsöğüts-type granitei-type granitecentral sakaryapartial melting