Quaternary Basaltic Volcanism Reflecting Heterogeneous Mixture of Two Mafic Melts: Golova Basaltic Rocks, Southern Anatolia, Turkey

The Quaternary volcanic rocks from Golova region constitute an example of on intra-continental volcanism in Southern Anatolia, Turkey. These rocks were erupted along the left-lateral strike-slip Yumurta-l iota k fault zone. They comprise basaltic lavas containing mafic enclaves. The enclaves are distributed widely through the lavas and are spherical to ellipsoidal in shape. Both the host lavas and the mafic enclaves have an alkaline character. Fractional crystallization process was important in the formation of the mafic enclaves where olivine was the main crystallizing phase. However, fractional crystallization was not a dominant process in the host lavas. Geochemical and petrological characteristics of both the mafic enclaves and the host lavas imply that magma mingling occurred during or immediately before eruption.