Field, Petrographic and Geochemical Features of the Baranadağ Quartz Monzonite of the Central Anatolian Granitoids, Turkey

Authors: NURDAN S. AYDIN, A. PIRIL ÖNEN

Abstract: The Baranadağ quartz monzonite is one of the granitioid intrusions of the Central Anatolian Crystalline Complex (CACC) which represents the passive continental margin of the Anatolide-Tauride platform. Medium to coarse-grained Baranadağ quartz monzonites typically include mafic microgranular enclaves and K-feldspar megacrysts and are cut by aplitic dykes representing the youngest magmatic activity of the study area. The intrusion is mainly composed of orthoclase, plagioclase, quartz, hornblende, biotite and clinopyroxene. It displays a slightly alkaline character and relatively well-developed calc-alkaline trend. The metaluminous Baranadağ quartz monzonites show comparable field, petrographic and/or geochemical features with those of the H-type (Hybrid) granitoids of the CACC. This requires significant input from mafic magma. By considering the other H-type granitoids of the complex, the Baranadağ quartz monzonites have been classified as post-collisional granite (Post COLG).

Keywords: Baranadağ quartz monzonite, Central Anatolian Crystalline Complex, Hybrid-type granitoids, Post-collisional granites.

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