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

摘要

The western Anatolian magmatic province is typified by a large number of Late Cenozoic post-collisional granitoids. Of these magmatics, the Egrigoz pluton is one of the largest and least-understood plutons in the Menderes Massif. The Egrigoz 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 Egrigoz pluton indicate an origin through partial melting of mafic lower-cmstal source rocks. In western Anatolia, the melt generation mechanism for the intrusive rocks could be crustal extension and uplift following collision.