Petrogenesis of the Late Cenozoic Egrigöz Pluton in Western Anatolia, Turkey: Implications for Magma Genesis and Crustal Processes

Abstract

The western Anatolian magmatic province is typified by a large number of Late Cenozoic postcollisional granitoids. Of these magmatics, the Egrigöz pluton is one of the largest and leastunderstood plutons in the Menderes Massif. The Egrigöz intrusives are subalkaline, high-K, and calc-alkaline, and have characteristics of I-type granites. They consist mainly of granodiorite and granite. The intrusive rocks show enrichment in LILE and LREE relative to HFSE. Their chondrite-normalized REE patterns are fractionated and have small negative Eu anomalies. Geochemical characteristics of the Egrigöz pluton indicate an origin through partial melting of mafic lower-crustal source rocks. In western Anatolia, the melt generation mechanism for the intrusive rocks could be crustal extension and uplift following collision.