Türkiye Jeoloji Bülteni

Geological Study of Horoz Granodiorite

Abstract: The Horoz granodiorite is located in the eastern part of the Bolkardağ. A detorled study of the gra-nodiorite showsthat the emplacement is shallow and has "delayed tectonics" sharacter. The emplacement of the granodiorite has increased thegeothermal gradient of the region. The dyke rocks which are related to the granodiorite are, in the order of emplacement, Biotitebearing tonalite porphyry, Muscovite bearing tonalite porphyry, and Diorite porphyry. The volume of these dykes within thegranodiorite body decrease inversely with time. Some of them are emplaced parallel to the main axis of the granodiorite during theevolution of the body. However, diagonally emplaced dykes are better developed and their directions change with time.