Kibici, YasarIlbeyli, NurdaneYildiz, AhmetBagci, Metin2024-09-182024-09-1820080020-68141938-2839https://doi.org/10.2747/0020-6814.50.10.931https://hdl.handle.net/20.500.12483/13731Tavsanli Zone in northwest Turkey is intruded by many Late Cretaceous to Eocene (91-45 Ma) calc-alkaline granitoids, of which the Gunyuzu pluton in the Eskisehir region is the least studied. The Gunyuzu rocks are high-K, calc-alkaline (I-type) intrusions. and are comprised of diorite, granodiorite, granite, and granite porphyry. Typical minerals are plagioclase, K-feldspar, quartz, biotite, hornblende and Fe-Ti oxides. Chondrite-normalized REE patterns for the Gunyuzu rocks are moderately fractionated and have small negative Eu anomalies. They are enriched in LILE and LREE relative to HFSL, showing characteristics of arc-related granitoids. Low values of molar K2O/Na2O, Al2O3/(FeO+MgO+TiO2). and (Na2O+K2O)/(FeO+MgO+TiO2) ratios demonstrate that the Gunyuzu magma(s) were produced from mafic lower crustal rocks.eninfo:eu-repo/semantics/closedAccessMagmatic ComplexWesternEvolutionGenerationGranitoidsRocksZoneGeochronologyPetrogenesisMetamorphismArticle501093194710.2747/0020-6814.50.10.9312-s2.0-65649146141Q1WOS:000259154700005Q2