Akademik Veri Yönetim Sistemi
12h International Multidisciplinary Scientific Geoconference (SGEM), Albena, Bulgaristan, 17 - 23 Haziran 2012, ss.241-248
Magmatism in western Turkey has been active since Pre-Cambrian and their origin has been focus of long lasting debate as it coincided with Tethyan events in the Mediterranean region. One of the well-defined massifs in Turkey, the Menderes Massif, was characterized by intense deformation and co-eval magmatism that was subjected to multiple metamorphic events. Magmatism, which corresponds to orthogneisses, porphyritic metagranites, and tourmaline-rich leucocratic metagranites, was mainly attributed to the Pan-African basement that was later deformed during Alpine event. This study deals with geochemical and Sr-Nd isotopic characteristics of the Pan-African rocks in the central Menderes Massif. Orthogneisses and porphyritic metagranites display intrusive contact relationships into the high-grade metaclastic rocks that comprise garnet-mica schists intercalated with amphibolites/amphibolite schists. Tourmaline-rich leucocratic metagranites appear as latest intrusive phase, intruding the pre-existing Pan-African basement rocks. They plot mostly in the granite field and are calc-alkaline and have medium to high-K and K-series, peraluminous and S-type characteristics. REE patterns show low LREE/HREE ratios and negative Eu anomalies. Sr-87/Sr-86 and Nd-143/Nd-144 values range from 0.729933-0.768649 and from 0.512293 to 0.512599, respectively. Geochemical data combined with isotopic values suggest that these rocks within the Menderes Massif derived from crustal magma sources associated with syn-collisional or post-orogenic events.