Petrographic Characteristics of the Mafic Enclaves of Neogene Lava Dome around Sağlık and Yatağan Area, Konya/Türkiye

Abstract

To the west of Konya, a widespread lava dome has evolved as a component of Neogene Erenlerdagi volcanism associated with subduction. Its formation involved assimilation-fractional crystallization (AFC) and/or magma mixing processes. The lava is characterized by occurrence well-developed Mafic Microcrystalline Enclaves (MME), which has variable sizes (from a few cm to a few meters) and shapes (ellipse/rounded-angular). The enclave comprises phenocrysts of plagioclase (10-50%), green amphibole (10-15%), quartz (ocelli) (0-10%), biotite (0-5%), epidote (0-5%), and opaque minerals (5-50%). The matrix consists of plagioclase, chlorite, light green epidote, green amphibole, biotite, and opaque iron ore.