Abstract

A~a96ren Intrusive Suite (AIS) is represented the main intrusive body of the south western part of Central Anatolia and is composed of granitoid, gabbro and young dykes. Gabbroic rocks crop out paralel to the elongation of the suite and has sinuous contact with granitoid. Mafic microgranular enclaves are common features of the granitoid and they are dioritic and monzodioritic in composition. Acicular apatite, bladed biotite and quartz ocelli are the typical features of these encalves suggesting to a magma mixing/ mingling process for their origin. The anorthite contents of the plagioclases in the granitoid and its enclaves show an increase from the rim towards the core. The enclave plagioclases and core compositions overlapping with the composition of the gabbro plagioclases. These compositional similarities of the plagioclases suggest that the enclaves are derived from gabbroic magma and crystallized within the felsic magma which produced the A~a96ren granitoid.

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